RPVCCA_CC_SR_2011_12_20_02_EIR_San_RamonPUBLIC HEARING
Date:December 20,2011
Subject:.SAN RAMON CANYON STORM DRAIN IMPROVEMENT AND
EMERGENCY SLOPE STABILIZATION PROJECT (COASTAL
PERMIT &ENVIRONMENTAL ASSESSMENT [CASE NO.
ZON2011-00326])
Location:San Ramon Canyon near the Palos Verdes Drive East upper
switchback,extending southerly under Palos Verdes Drive South,
underground through Shoreline Park,and terminating at the base
of the bluff at the beach (APN 7564-019-900 &7564-024-901)
1.Declare the Hearing Open:Mayor Misetich
2.Report of Notice Given:City Clerk Morreale
3.Staff Report &Recommendation:Senior Planner Schon born
4.Public Testimony:
Appellant:N/A
Applicant:City of Rancho Palos Verdes
5.Council Questions:
6.Rebuttal:N/A
7.Declare Hearing Closed:Mayor Misetich
8.Council Deliberation:
9.Council Action:
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CITY OF
MEMORANDUM
RANCHO PALOS VERDES
TO:
FROM:
DATE:
SUBJECT:
REVIEWED:
Project Manager:
HONORABLE MAYOR &CITY COUN
JOEL ROJAS,COMMUNITY DEVELOP
DECEMBER 20,2011
SAN RAMON CANYON STORM DRAIN IMPROVEMENT
AND EMERGENCY SLOPE STABILIZATION PROJECT
(COASTAL PERMIT &ENVIRONMENTAL ASSESSMENT
[CASE NO.ZON2011-00326])
ApPLICANT:City of Rancho Palos Verdes,Public Works
ADDRESS:San Ramon Canyon near the PV Drive East upper
switchback,extending southerly under Palos Verdes Drive South,
underground through Shoreline Park,and terminating at the base
of the bluff at the beach (APN 7564-019-~H 7564-024-901)
CAROLYN LEHR,CITY MANAGERc.J>L-
Eduardo Schonborn,AICP,Senior Plann~
RECOMMENDATION
Adopt Resolution No.2011-_,approving a Mitigated Negative Declaration and a Finding
of No Significant Impact;and adopt Resolution No.2011-_,approving a Coastal Permit
for the San Ramon Canyon Storm Drain Improvement and Emergency Slope Stabilization
Project (Case No.ZON2011-00326).
EXECUTIVE SUMMARY
On March 1,2011,the City Council identified a preferred alternative design for the San
Ramon Canyon storm drain improvement and emergency stabilization.City Staff has been
working closely with a firm to engineer an alignment that is located completely within the
City of Rancho Palos Verdes.The design includes a new mid-canyon storm drain inlet
near the upper switchback of Palos Verdes Drive East;tunnel alignment from the mid-
canyon inlet north of 25 th Street that would gravity flow through the tunnel to a cut and
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covered section of buried pipe located south of Palos Verdes Drive South;and transition
into a second tunnel to a new outlet structure at the base of the bluff at the beach.The
design of the storm drain project is nearing completion and is currently estimated to be
80%complete,with biddable construction documents anticipated in Spring 2012.
Since Staff continues to seek funding opportunities from various agencies at both the State
and Federal levels,Staff has coordinated compiling the appropriate environmental
documents to address the environmental requirements for CEQA and NEPA,which
address State and Federal environmental requirements,respectively.After conducting the
environmental analyses in accordance with these applicable regulations,it has been
determined that the proposed storm drain project will have a less than significant impact
and/or the impacts can be mitigated to less than significant.As a result,a Mitigated
Negative Declaration and a Finding of No Significant Impact have been prepared for the
City Council's approval.Further,since the project includes a new outlet at the base of the
bluff along the beach in the City's Coastal Zone,a Coastal Permit is also being presented
to the City Council for approval.
BACKGROUND
The San Ramon Canyon drainage system poses ongoing threats to the City of Rancho
Palos Verdes and the community below 25
th Street.Access along Palos Verdes Drive
South is frequently impacted during and following storm events.There is a ~ossibiHty that
access could be cut-off entirely for an extended period should the 25 h Street road
embankment fail.The lower switchback on Palos Verdes Drive East is also being
threatened by progressive erosion within the canyon,largely as a result of the Tarapaca
Landslide.Runoff during storm events erodes the top of the landslide causing the
landslide to continue to slip,which drives the stream bed to move to the west which erodes
the embankment adjacent to the lower switchback.As the runoff within the canyon
continues to erode the toe of the landslide and the Tarapaca Landslide continues to move,
the Tarapaca neighborhood above the landslide is being threatened.The community
below 25th Street (which is part of the San Pedro community in the City of Los Angeles)is
in the path of the drainage system,which could be overwhelmed in a severe storm.The
current system is not capable of managing large amounts of debris that are generated from
within the canyon,and since storm water generated from the canyon does not have a
direct outlet to the ocean,25th Street at the mouth of the canyon stores rocks,mud and
water that results in the flooding and road closures of 25th Street.
As a result of these storm impacts,a project study report was prepared to identify how best
to address the drainage deficiencies.The report was presented to the City Council on
March 1,2011;at which time the Council identified a preferred alternative and directed
Staff to solicit professional services to engineer and design the preferred alternative.
In July 2011,City Staff released an Early Consultation Public Draft environmental
document for the proposed storm drain improvements to the general public,and to State
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and Federal agencies that will also issue permits and approvals for the project.This gave
the resource agencies an opportunity to review the documents and provide feedback to the
City to strengthen the document.The document was also made available on the City's
website and a Notice was published in the Peninsula News advertising the availability of
the document.
After addressing the resource agencies' preliminary comments and conducting additional
analyses,a Mitigated Negative Declaration (MND)was prepared in accordance with the
California Environmental Quality Act (CEQA).Further,a Finding of No Significant Impact
(FONSI)was prepared in accordance with the National Environmental Policy Act (NEPA).
Since both documents assess the project's environmental impacts,the documents were
combined into one MND/FONSI environmental document.Furthermore,a Coastal Permit
was initiated for the portion of the project that will be conducted on Shoreline Park,which is
in the City's Coastal Zone.
On November 16,2011,the City mailed notices to the 71 property owners within a 500-foot
radius from the subject properties,and subsequently published the notice in the Peninsula
News on November 17,2011,informing the public of the pending environmental document
and Coastal Permit.On November 17,2011,Staff also circulated the Initial
Study/Mitigated Negative Declaration to all applicable public agencies,including the
California State Clearinghouse,affording a comment period of at least thirty days (as
required by CEQA and NEPA)prior to action on the MND/FONSI.All property owners and
public agencies were given a 30-day period in which to submit comments and concerns,
which will expire on December 19,2011.As of the date of this report,Staff has received
two comments on the project.The comment identifies an alternative design/alignment,and
does not raise issues or concerns with the environmental documentation orthe associated
Coastal Permit.This comment is addressed in more detail in the Public Comments section
of this Staff Report.The second comment is from the Los Angeles County Fire
Department,indicating that the environmental document addresses their issues and
criteria.
SITE DESCRIPTION
The project area is located within the south eastern portion of the City of Rancho Palos
Verdes.The site is generally bound by Palos Verdes Drive East (PVDE)on the west,Calle
Aventura and Tarapaca Road to the north,Friendship Regional Park and the City of Los
Angeles boundary to the east,and the Pacific Ocean to the south.San Ramon Canyon is
located north of W.25th Street.
The storm drain system is proposed to be completely within City-owned property and
rights-of-way.The system will commence midway up the San Ramon Canyon,adjacent to
the upper switchback of Palos Verdes Drive East.The project will be tunneled in a
southerly direction under the PV Drive South roadway,onto the City's Shoreline Park
property,which is part of the City's Nature Preserve,and outlet at the beach below.Lastly,
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the area of the proposed outlet,which is at the base of the coastal bluffs (Le.,shore),is
seaward of the Coastal Setback Line (CSL)and within the City's Coastal Zone.
PROJECT DESCRIPTION
The project consists of constructing a large diameter (54 inch)steel storm drain system to
convey storm water from San Ramon Canyon to the beach,and will be designed to handle
existing upstream flows for a 1OO-year storm event.The project undertaking includes a
new mid-canyon storm drain inlet structure and tunnel alignment north of PVDS/25th Street
that will gravity flow through the tunnel to a "cut and covered"section of buried pipe located
within a one hundred foot wide easement along the eastern property boundary at Shoreline
Park south of PVDS/25th Street,and transition into a second tunnel to a new outlet
structure at the base of the bluff.In addition to construction of the inlet structure in the
canyon and tunnel,a dirt filled gravity-type buttress and associated terrace drains would be
constructed within the canyon in order to reduce the potential for future deep-seated
movement within the actively failing portion of the canyon that is caused by the active
Tarapaca landslide.The buttress will be established at an elevation which is similarto the
pre-erosion elevation within the canyon.The inlet structure will be screened with new
vegetation along the perimeter,while the buttressed fill and the construction areas in the
canyon will be restored with native vegetation.
From San Ramon canyon,the storm drain system will be tunneled under the PVDS
roadway and into the City's Shoreline Park property where it will connect to a section of
pipe that will be installed using a "cut and cover"method so that the pipe is completely
underground and not visible.This underground pipe will extend along the eastern edge of
the park property and down towards the ocean where it will terminate at an outlet structure
at the base of the bluff at the beach,which will be located above the high tide line.The
beach apron will include large beach boulders to dissipate flow velocities and protect the
beach from erosion.Any construction related runoff will be confined to the beach and will
not enter the ocean.The new outlet at the beach lies seaward of the Coastal Setback Line
(CSL),within an Appealable Area of the City's Coastal Specific Plan district.
After construction,the area along Shoreline Park will be restored to enhance the open
space and recreation uses of this Preserve area by providing an improved access path
from PVDS to Shoreline Park.The improved access path will allow maintenance workers
to access the site to perform any required maintenance of the storm drain facility.In
addition,the improved access path will provide a better connection for pedestrians seeking
access to Shoreline Park from PVDS/25th Street.The maintenance access path will
connect to the existing trail network on Shoreline Park and would be located outside of the
preserve boundary wholly within the existing 1OO-foot wide utility easement,consistent with
the City's NCCP.
The project's total storm drain alignment will measure approximately 4,200 lineal feet of 54"
diameter pipe from inlet to outlet.No improvements or cleaning are proposed to the
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existing storm drain system that is below 25th Street,as it is located within the San Pedro
community of the City of Los Angeles.However,the existing storm drain will remain in
place,serving as a drain for the Los Angeles watershed and as a backup system to San
Ramon Canyon as necessary.
Lastly,the project will require two vehicular access roads north of 25th Street in order to
access the San Ramon Canyon area.The first access road would be constructed from the
northern-most switchback of PVDE in order to access the canyon for construction of the
inlet structure.The second construction access road would utilize the existing access road
located on the southern side of the southern-most switchback of PVDE,which will provide
access for the buttress fill portion of the project.This second construction access road was
recently installed as part of the recently completed sewer line undergrounding project in the
same location.Both access roads will not be paved and will remain after the project is
completed to facilitate access for any required maintenance of the storm drain facility.
CODE CONSIDERATIONS AND ANALYSIS
ENVIRONMENTAL ASSESSMENT
NEPA/CEQA Overview:
As with any project in the City,the project is subject to California Environmental Quality Act
(CEQA)review,which establishes the environmental guidelines for all projects within the
State of California.The Federal equivalent of CEQA is the National Environmental Policy
Act,or NEPA.CEQA defines procedures for environmental review and impact analysis of
projects that need approval by local or state agencies,while NEPA does the same for
projects that need approval by federal agencies.Both laws require that the potential
environmental impacts of a proposed project be assessed,quantified,disclosed,
minimized,and eliminated whenever possible.
Since Staff continues to seek funding opportunities from various agencies at both the State
and Federal levels,Staff has coordinated compiling the appropriate environmental
documents to address the environmental requirements for CEQA and NEPA,which
address State and Federal environmental requirements,respectively.Further,since the
project will be reviewed by the US Army Corps of Engineers,Staff has merged the NEPA
process into the CEQA assessment.Thus, although the environmental document is
heavily weighted towards CEQA references,it is important to note that it also suffices for
and addresses the requirements of NEPA.
A decision to prepare a MND/FONSI or an EIR/EIS was based upon the results of the
Initial Study.If an Initial Study shows that there may be impacts resulting from a proposed
project that cannot be mitigated to such a degree that the project would still result in a
significant adverse impact,then an EIR must be prepared.Alternatively,if potential
significant adverse impacts can be mitigated so that such impacts would no longer be
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considered a significant adverse impact,then an MND may be prepared.In making its
decision,as it does with any other project,the initial study checklist and environmental
assessment were completed for the proposed project,and based upon the design
parameters of this specific project,and the technical studies for the project that addressed
the impacts,Staff felt that any potentially significant adverse impacts could be mitigated to
an insignificant level.Although NEPA and CEQA identify a number of categorical
exclusions and exemptions that would exclude and exempt a proposed project from the
preparation of environmental documents,an exclusion or exemption could not be identified
for the proposed project.As such,Staff felt that an MND was the appropriate document to
address the environmental effects of the project in accordance with CEQA,and a FONSI
was the appropriate document in accordance with NEPA.
As a result,the Initial Study and subsequent Mitigated Negative Declaration (MND)were
prepared.In accordance with the provisions of CEQA,as a result of the Initial Study a
Mitigated Negative Declaration (MND)was prepared;and,in accordance with the
provisions of NEPA,as a result of an Environmental Assessment a Finding of No
Significant Impact (FONSI)was prepared.The combined document is attached forthe City
Council's review.
It is important to note that the NEPA process requires that an Alternative project analysis
be conducted, which is not a requirement for an MND pursuant to CEQA.As such,
alternatives were developed to meet the purpose and needs of the project by the City.
Although all impacts with the proposed project are mitigated to less than significant levels,
alternatives were also analyzed to avoid resource impacts to wetlands,floodplains,
endangered species,etc.Based on the alternatives reviewed,when compared to the
proposed project,the proposed project presents the least amount of jurisdictional and
native habitat impacts.Further,the proposed design eliminates reliance on other
jurisdictions and their processes since the project would be wholly confined to the City of
Rancho Palos Verdes.
Document Circulation:
The MND/FONSI was circulated to all applicable public agencies on November 17,2011,
including the California State Clearing House for a posting and comment period of 30-days.
A public notice was also mailed to all property owners and interested parties within a 500-
foot radius from the storm drain system,and a notice was published in the Peninsula News
on November 17,2011.Lastly,the Notice and the environmental documents were posted
on the City's website,with direct links on a webpage devoted to the San Ramon Canyon
Storm Drain Improvement and Emergency Stabilization Project.As of the date of this
report,Staff has received two comments on the project.One comment identifies an
alternative design/alignment,and does not raise issues or concerns with the environmental
documentation or the associated Coastal Permit.This comment is addressed in more
detail in the Public Comments section of this Staff Report.The second comment is from
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the Los Angeles County Fire Department,indicating that the environmental document
addresses their issues and criteria.
Environmental Findings:
As shown in the attached Initial Study/Environmental Assessment,the project will not result
in or create any significant impacts,or have less than significant impacts to:
•Agriculture and Forestry Resources;
•Cultural Resources;
•Geology,Soils,and Seismicity;
•Greenhouse Gas Emissions;
•Hazards and Hazardous Materials;
•Land Use and Planning;
•Energy and Mineral Resources;
•Population and Housing;
•Public Services;
•Recreation;and,
•Utilities and Service Systems.
However,it was identified that the storm drain project would create significant impacts to
Aesthetics;Air Quality;Biological Resources;Hydrology and Water Quality;Noise;and,
Transportation and Traffic,unless mitigated with appropriate measures.These potential
impacts and the associated mitigation measures that reduce said potential impacts to an
insignificant level are discussed below.
Aesthetics:It was identified that the project may result in an aesthetic impact with regards
to the visibility of the outlet structure at the beach,and the resulting aesthetics of the areas
in San Ramon Canyon that will be trenched to lay the drain pipe and the buttressed fill.
The potential aesthetic impacts have led to the incorporation of mitigation measures that
require revegetation ofthe impacted areas near the inlet,and stealthing the outlet structure
with natural earth-tone color.Prior to revegetating these areas,the City will ensure the use
of a local native plant seed mix that will be coordinated with the Palos Verdes Land
Conservancy.Incorporation of these mitigation measures will result in a less than
significant impact upon aesthetics.
Air Quality:It was identified that the project may result in an air quality impact with regards
to exposing sensitive receptors to short-term,construction related pollutants,odors and
dust.Residences are identified as a sensitive receptor,and exposure to dust and exhaust
emissions from construction activities was identified as a potential impact.However,this
potential impact has led to the incorporation of mitigation measures that require the use of
Best Management Practices (BMPs),such as watering of graded areas to minimize dust,
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for avoiding short-term related air quality impacts.As such,by incorporating these
mitigation measures,there will be no significant adverse impacts upon air quality.
Biological Resources:It was identified that the project may result in a biological resources
impact due to habitat loss of coastal sage scrub and jurisdictional drainage.Specifically,
the project will impact 0.34-acre of coastal sage scrub,0.02-acre of coastal bluff scrub,and
1.36-acres of grassland habitat.
The City's NCCP,which was approved in 2004 by the City Council,creates a habitat
preserve forthe purpose of mitigating a set amount of habitat loss resulting from public and
private projects in the City over a span of 50 years.One of the covered projects identified
in the City's NCCP is the Lower San Ramon Canyon Project,which was anticipated to
result in 2-acres of coastal sage scrub loss and 6-acres of non-native grassland loss.
These anticipated impacts are mitigated through the dedication of City-owned land into the
Preserve and habitat restoration in the Preserve performed by the Palos Verdes Peninsula
Land Conservancy (PVPLC)for the City.Since the quantity of habitat loss resulting from
the proposed project is within the quantity of loss estimated in the NCCP,the loss is
mitigated pursuant to the City's NCCP.
With regards to the jurisdictional drainage impacts,the storm drain project will impact 0.07-
acre of jurisdictional drainage.The impacts from the canyon and jurisdictional fill will be
mitigated by post-construction re-vegetation of the new streambed at a ratio of 3:1,per the
requirements of the Army Corps of Engineers (ACOE).Thus,0.21-acres will be restored
through the ACOE's 404 permit process.The City will ensure the use of a local native
plant seed mix that will be coordinated with the applicable agencies prior to re-vegetating
the area.It is important to note that City Staff has been working with the Army Corps for
several months,and the application was submitted on December 9,2011 to start their
approval process.As such,by incorporating such mitigation measures,there will be no
significant adverse impacts upon biological resources.
HvdrologvlWater Quality:It was identified that the project may result in an impact with
regards to wastewater discharge and storm water runoff.The potential impact has led to
incorporation of a mitigation measure that requires preparation and approval of a Standard
Urban Storm Water Mitigation Plan (SUSMP)prior to commencing work on the project.
Further,a Storm Water Pollution Prevention Plan (SWPPP)will be prepared to address
construction storm water runoff,and incorporated into the City's Water Quality
Management Plan as outlined by the Los Angeles Regional Water Quality Control Board
(LARWQCB).It is important to note that City Staff has also been working with the
LARWQCB Staff for several months to ensure that the necessary information is submitted
with the application.As such,the application was submitted on December 9,2011 to
commence their approval process.Thus,incorporation of a mitigation measure will result
in a less than significant impact upon hydrology and water quality.
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Noise:It was identified that the project may result in impacts with increased noise levels as
a result of the construction activity.Although the noise impact will be short-term and
related to construction,it has led to incorporation of mitigation measures that limit hours of
construction and the queuing of construction vehicles.Incorporation of mitigation
measures will result in a less than significant impact upon noise.
Transportation/Traffic:It was identified that the project may result in transportation and
traffic impacts with regards to construction activity.As a result,mitigation measures have
been incorporated in the form oftraffic control measures,construction timing and phasing,
and queuing of construction vehicles.As such,by incorporating these mitigation
measures,there will be no significant adverse impacts upon transportation and traffic.
As such,Staff has concluded that a Mitigated Negative Declaration and a Finding of No
Significant Impact can be approved for this project since mitigation measures have been
incorporated to result in a project with less than significant impacts.
COASTAL PERMIT
As indicated above,the San Ramon Storm Drain system will terminate with a new outlet at
the beach below Shoreline Park.The outlet portion of the proposed storm drain system will
be located within the appealable portion of the Coastal Zone and completely seaward of
the coastal setback line.As a result,approval of a Coastal Permit is required pursuant to
Chapter 17.72 of the Rancho Palos Verdes Development Code (RPVDC).Further,
pursuant to Section 17.72.080.C,the City Council is authorized to conduct the public
hearing on the Coastal Permit when the purpose of the application is to maintain access or
essential public services.Staff believes that the proposed San Ramon Storm Drain Project
is an essential public service that ensures proper drainage of the canyon and ensures that
access to and from the City is maintained during storm events.
Although the project entails grading to install the infrastructure of the drainage system,a
grading approval is not required because construction of a Public Works project is exempt
from Planning Division review pursuant to RPVDC Section 17.76.040(C)(4).
Nonetheless,in considering a coastal permit application,Rancho Palos Verdes
Development Code Section 17.72.090 requires the City Council to consider two findings in
reference to the property and project under consideration (RPVDC language is boldface,
followed by Staff's analysis in normal type):
1.The proposed development is consistent with the Coastal Specific Plan:
The proposed project includes construction of a new storm drain system that will outlet
directly onto the beach below the City's Shoreline Park,thereby redirecting the storm flows
that have historically flooded the 25tti Street roadway and made it impassable.The subject
property is located within Subregion 8 of the City's coastal zone,as established by the
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Rancho Palos Verdes Coastal Specific Plan,and is designated as a natural open space
area.As described above,the new storm drain system will be underground as it traverses
the Shoreline Park property and will not be visible.Further,the project will include a
maintenance access path that will also serve to facilitate pedestrian access from PV Drive
South/25th Street,to Shoreline Park at the northeastern portion of the site.As a result,
Staff believes that the project is consistent with Coastal Specific Plan Policy No.4 for
Subregion 8,which states in part,"Encourage ...at least two walkways:one from 25th Street
along the eastern portion of the site;the other access point should align with the City's trail
in Subregion 7."
Staff believes that the project is also consistent with policies nos.1 and 4 in the Natural
Environment Element of the Coastal Specific Plan,which state:
Policy No.1:''Allow only low intensity activities within [CRM-1]."
Policy NO.4:''Allow non-residential structures not requiring significant excavation or
grading within Coastal Resource Management Districts within [CRM-4]..."
The Park site falls within general categories established by the Coastal Specific Plan called
Coastal Resource Management districts.The Park falls specifically within CRM-1 (Extreme
Slope),CRM-4 (Marginally Stable)and CRM-9 (Wildlife Habitat)of the Coastal Specific
Plan Natural Environment Element.Consistent with the aforementioned policies,the
project is considered low intensity since it will not result in an intensification of use of the
property,and it will not be visible since the drainage system will be wholly underground.
Further,the project entails a non-residential structure,which after some excavation,will be
covered and re-vegetated so that the infrastructure is not visible.
Lastly,the proposed project is consistent with the specific criteria/purpose of each of the
Coastal Resource Management districts (i.e.,CRM-1,CRM-4 and CRM-9 districts).Each
CRM is as follows:
CRM-1 (Extreme Slope)indicates that "the retention of natural topographic
conditions is important and nonstructured uses such as passive parks,trails,
agriculture,etc.,are appropriate."
CRM-4 (Marginally Stable)indicates that the "preferred land use would include
recreational facilities such as picnic areas,hiking trails ...and only small,
nonpermanent units not requiring significant earthwork,such as picnic shelters,are
desirable".
CRM-9 ("Wildlife Habitat)indicates that "it is important to review any proposed
development within or adjacent to wildlife habitat districts for the nature of the
impact upon the wildlife habitat and possible mitigation measures to fully offset any
impacts."
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Detailed geologic and biology reports have been conducted for the proposed alignment,
which have concluded that allowing the new system will not negatively impact the area
since the storm drain system will prevent uncontrolled erosion of the bluff face and the
alignment will be re-vegetated,which would be consistent with and/or furthers the
aforementioned standards ofthe CRM-1,CRM-4 and CRM-9 districts.In addition,although
there will be permanent loss of coastal bluff scrub as a result of the project,these impacts
have been mitigated by the City's NCCP Subarea Plan,which requires that a certain
amount of habitat be restored by the City on an annual basis within the City's nature
Preserve.
The proposed project will also facilitate access to the site and the trail network on Shoreline
Park.Further,the project will not alter the uses on the site and will continue to operate as
a park facility with passive recreational opportunities.Lastly,the new outlet will be located
at the base of the bluff at the beach where it will discharge storm water to the ocean.With
the outlet located at the beach below,it will prevent damage and erosion of the coastal
bluff.Further,although the storm drain system would carry sediment during storm events
that would directly outlet to the ocean,it is not anticipated that the sediment will adversely
impact coastal resources since the system will collect water from a natural canyon upslope
of the site.Lastly,the amount of debris would be reduced by the inlet structure,which will
include steel grates to reduce the amount of debris entering the storm drain.Therefore,
Staff believes that the proposed project is consistent with the Coastal Specific Plan.
2.The proposed development,when located between the sea and the first public
road,is consistent with applicable public access and recreation policies of the
Coastal Act.
The Shoreline Park property is located between the sea and the first public road (Le.,Palos
Verdes Drive South).It is a public park that facilitates public access from the street to the
coastline through a web of paths that have been carved by foot traffic.As discussed
above,the proposed project is the construction of a new storm drain system,which is
entirely underground and outlets directly onto the beach below Shoreline Park.The public
access policies of the Coastal Act (Chapter 3,Article 2)generally require the provision of
public coastal access as a condition of new development.However,Section 30212(b )(5)
of the Coastal Act exempts maintenance activities such as this storm drain system from the
definition of "new development."Notwithstanding,public coastal access would be
maintained and would not be hindered since the storm drain system would be below
ground.Consequently,access would be improved since a new maintenance access path
would be installed at the northeastern portion of the park site,which will also serve to
improve the current pedestrian accessibility to the site from along PV Drive South/25th
Street.With respect to the recreation policies of the Coastal Act (Chapter 3,Article 3),the
subject property is designated and functions as an unimproved park,and will continue to
provide for reasonable passive coastal recreation.Therefore,Staff believes that the
proposed project is consistent with the applicable public access and recreation polices of
the Coastal Act.
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ADDITIONAL INFORMATION
Overlay Control District:
The subject property is included within the Socia-Cultural Overlay Control (OC-2)District
and the Urban Appearance Overlay Control (OC-3)District,as established by RPVDC
Sections 17.40.050 and 17.40.060,respectively.The OC-2 and OC-3 district impose
performance criteria on proposed development.The proposed project does not involve
any development on the subject property that would be substantially inconsistent with any
of these performance criteria.However,to ensure that construction impacts are further
minimized,Staff has incorporated a condition that requires a qualified paleontologist and
archeologist to monitor and grading and excavation activities on the Shoreline Park
property.
Public Comments:
As indicated above,Staff has received two comments,one from the Los Angeles County
Fire Department and another from Gene Dewey.The Los Angeles County Fire
Department indicates that the environmental document addresses their issues and criteria
regarding land development,planning,erosion control,and watershed management.
Mr.Dewey's comment is not in direct response to the Notice,environmental document or
Coastal Permit;rather,Mr.Dewey raises an alternative storm drain design that relies on
connecting to the existing system in the City of Los Angeles.Consistent with NEPA
requirements,Staff considered alternatives to the proposed design.As indicated in the
attached MND/FONSI,seven alternative designs were considered,including several
designs that rely on connecting to the existing storm drain system in the City of Los
Angeles.However,the condition of the existing storm drain system in the City of Los
Angeles is unknown,as no technical information has been submitted to the City of Rancho
Palos Verdes regarding the condition and capacity of the system.Since the capacity and
condition of that system is unknown,the City of Rancho Palos Verdes would have to
expend more time and money to assess the system.Notwithstanding the lack of
information,these alternatives have not been well received by the City of Los Angeles.
The City of Los Angeles Department of Public Works Staff has indicated in numerous past
meetings with the City of Rancho Palos Verdes that such alternatives that include
construction at the mouth of San Ramon Canyon (adjacent to 25th Street)and traversing
the privately owned parcel immediately to the north of 25th Street is not likely due to
environmental and jurisdictional constraints at the mouth of San Ramon Canyon and the
impacts to the downstream residents in the mobile home park during construction.As a
result,based on the alternatives reviewed,and considering the alternative design
expressed by Mr.Dewey that relies on connecting to the system in Los Angeles,the
proposed design has been identified as presenting the least amount of jurisdictional and
2-13
STAFF REPORT -CP &EA (Case No.ZON2011-00326)
San Ramon Canyon Storm Drain Improvement &Emergency Stabilization Project
December 20,2011
native habitat impacts,and eliminates reliance on other jurisdictions and their processes
since the project would be wholly confined to the City of Rancho Palos Verdes.
No other comments were received by Staff in response to the Notice forthis public hearing.
Staff believes that the workshops conducted by the Public Works Department,releasing a
preliminary draft environmental document,and keeping the public informed by consistently
updating the City's website regarding this project and providing updates in the City's
Newsletter,have all been instrumental in keeping the public informed ofthe project and its
status.
Access to the Environmental Document
Due to the size of the total environmental document,the printed Staff Report has the Initial
Study/Environmental Assessment,and the Mitigated Negative Declaration/Finding of No
Significant Impact document.The technical appendices that support the MND/FONSI are
included in the enclosed CD.Further,they are available online at the City's website,where
they have been since the notice was circulated in November.Specifically,access to the
technical appendices is available at the following address:
http://www.palosverdes.com/rpv/publicworks/San-Ramon/Appendices/.Lastly,the
information is also available at the Public Works and Community Development
Departments at City Hall.
CONCLUSION
Based upon the discussion above,Staff believes that a Mitigated Negative Declaration and
a Finding of No Significant Impact can be adopted for this project since mitigation
measures result in a project with less than significant impacts.Further,Staff believes that
both of the required findings for the approval of a coastal permit can be made for the
proposed project.Therefore,Staff recommends that the City Council adopt the Mitigated
Negative Declaration and Finding of No Significant Impact,and approve the requested
coastal permit (Case No.ZON2011-00326).
ALTERNATIVES
In addition to Staff's recommendation,the following alternatives are available for
consideration by the City Council:
1.Deny Case No.ZON2011-00326 for a Coastal Permit;or,
2.Identify any issues of concern with the proposed project,and provide the City's
Public Works Department with direction in modifying the project.
2-14
STAFF REPORT -CP &EA (Case No.ZON2011-00326)
San Ramon Canyon Storm Drain Improvement &Emergency Stabilization Project
December 20,2011
FISCAL IMPACT
The cost associated with the City Council's actions of adopting the MND/FONSI and
approving the Coastal Permit will result in a $2,119 expenditure that will be borne by the
City.This cost includes the environmental filing fees and the document posting fee with
the Los Angeles County Recorder's Office.
ATTACHMENTS
•Public comments
•Resolution No.2011-_adopting the Mitigated Negative Declaration and Finding of No
SigniHcant Impactforthe San Ramon Canyon Storm Drain Improvement &Emergency
Stabilization Project
•Resolution No.2011-_approving the Coastal Permit for the San Ramon Canyon
Storm Drain Improvement &Emergency Stabilization Project
•Initial Study/Environmental Assessment,and /Mitigated Negative Declaration/Finding of
No Significant Impact
2-15
PUBLIC COMMENTS
2-16
COUNTY OF LOS ANGELES
FIRE DEPARTMENT
1320 NORTH EASTERN AVENUE
LOS ANGELES,CALIFORNIA 90063"3294
(323)881-2401
DARYL L.OSBY
FIRE CHIEF
FORESTER &FIRE WARDEN
December 7,2011
Alan Braatvedt,Staff Member
City of Rancho Palos Verdes
Public Works Department
30940 Hawthorne Blvd.
Rancho Palos Verdes,CA 90275
Dear Mr.Braatvedt:
RECEIVED
City of Rancho Palo$Verdes
DEC 12 20B
PUI311C WORKS DEPARTMENT
NEPA ENVIRONMENTAL ASSESSMENT AND FINDING OF NO SIGNIFICANT IMPACT.CEQA
INITIAL STUDY AND MITIGATED NEGATIVE DECLARATION.SAN RAMON CANYON STORM
DRAIN TUNNEL PROJECT SCH 2G110711Q84,PLANNING.CONSTRUCTION AND OPERATION
OF STORM DRAIN AND TUNNEL,WEST 25TH STREET AT PALOS VERDES DRIVE EAST.
RANCHO PALOS VERDES.(FFER#201100190)
The NEPA Environmental Assessment and Finding of No Significant Impact has been reviewed bythe
Planning Division,Land Development Unit,Forestry Division,and Health Hazardous Materials
DiVision of the County of Los Angeles Fire Department.The folloWing are their comments:
PLANNING DIVISI.ON:
1.We have no comments at this time.
LAND DEVELOPMENT UNIT:
1.The County of Los Angeles Fire Department,Land Development Unit has no objection to the
proposed project.
FORESTRY DIVISION -OTHER ENVIRONMENTAL CONCERNS:
j
1.The statutory resp.onsibilities of the County of Los Angeles Fire Department.Forestry Division
include erosion control,watershed management,rare and endangered species,vegetation,
SERVING THE UNINCORPORATED AREAS OF LOS ANGELES COUNTY AND THE CITIES OF:
AGOURA HILLS
ARTESIA
AZUSA
BALDWIN PARK
BELL
BELL GARDENS
BELLFLOWER
BRADBURY
CALABASAS
CARSON
CERRITOS
CLAREMONT
COMMERCE
COVINA
CUDAHY
DIAMONOBAR
DUARTE
El MONTE
GARDENA
GLENDORA
HAWAIIAN GARDENS
HAWTHORNE
HIDDEN HILLS
HUNTINGTON PARK
INDUSTRY
INGLEWOOD
IRWINDALE
LA CANADA FLINTRIDGE
LA HABRA
LA MIRADA
LA PUENTE
LAKEWOOD
LANCASTER
LAWNDALE
LOMITA
LYNWOOD
MALIBU
MAYWOOD
NORWALK
PALMDALE
PALOS VERDES ESTATES
PARAMOUNT
PICORIVERA
POMONA
RANCHO PALOS VERDES
ROLLING HILLS
ROLLING HILLS ESTATES
ROSEMEAO
SAN DIMAS
SANTA CLARITA
SIGNAL HILL
SOUTH EL MONTE
SOUTHGATE
TEMPLECrTY
WALNUT
WEST HOLLYWOOD
WESTLAKE VilLAGE
WHiniER
2-17
Alan Braatvedt,Staff Member
December 7,2011
Page 2
fuel modification for Very High Fire Hazard Severity Zones or Fire Zone 4,archeological and
cultural resources,and the County Oak Tree Ordinance.
2.The areas germane to the statutory responsibilities of the County of Los Angeles Fire
Department,Forestry Division have been addressed.
HEALTH HAZARDOUS MATERIALS DIVISION:
1.The Health Hazardous Materials Division has no objection to the proposed project.
If you have any additional questions,please contact this office at (323)890-4330.
very truly YOu~
J~~.CHIEF,FORESTRY (JIVISJON
PREVENTION SERVICES BUREAU
JRT:lj
2-18
EduardoS
From:Tom adom [tomo@rpv.com]
Sent:Thursday,December 08,2011 8:27 AM
To:'Ron Dragoo';'Andy Winje';'Alan Braatvedt';'EduardoS'
Cc:'Ray Holland'
Subject:FW:San Ramon Canyon
Here is the email from Gene Dewey and Barry Hildebrand regarding San Ramon requesting a meeting to
discuss an alternative to San Ramon as per our discussion yesterday.
Tom A.adom
Director -Department of Public Works
City of Rancho Palos Verdes
30940 Hawthorne Blvd.
Rancho Palos Verdes,CA 90275
31 0-544-5335
From:R.Gene Dewey [mailto:rgdewey@cox.net]
Sent:Monday,November 28,20111:45 PM
To:'Tom adom'
Cc:Barry Hildebrand
Subject:RE:San Ramon Canyon
Thanks Tom,
I'll contact you when I return.Barry Hildebrand would like to join us when we meet.The city of LA
installed some 2.5 II thick polypropylene pipe for the rerouted storm drain on the east side of the
Paseo de Mar slide.It is excellent material and will last a long time.Possibly this type of pipe could be
placed in the bottom of San Ramon Canyon.You might want to take a quick look at it.They just finished
installing it last week.
Gene
From:Tom Odom [mailto:tomo@rpv.com]
Sent:Monday,November 28,2011 8:02 AM
To:'R.Gene Dewey'
Cc:'Ray Holland';'Ron Dragoo';'Andy Winje'
Subject:RE:San Ramon Canyon
Hello Gene,
Thanks for the information and I will forward to our project engineers for their information and we can
schedule a meeting upon your return.Have a safe trip to Antarctica and take some pictures as I would
like to see some of your trip when we get together.
Tom A.adom
Director -Department of Public Works
City of Rancho Palos Verdes
30940 Hawthorne Blvd.
Rancho Palos Verdes,CA 90275
31 0-544-5335
From:R.Gene Dewey [mailto:rgdewey@cox.net]
Sent:Sunday,November 27,2011 9:56 AM
To:Tom Odom
Cc:Steven LaPine;Barry Hildebrand;Mickey Rodich
12/13/2011
Page 1 of2
2-19
Page 2 of2
Subject:San Ramon Canyon
Hi Tom,
I walked the San Ramon Canyon area the other day.The work the contractors did to stabilize the west side adjacent to
PVDE looks great.I visited with my friend in the city of LA survey department to confirm what I had discusses with you
regarding the storm water drainage system that is currently in place from PVDS to the ocean.The city cleaned out and
reestablished the drainage from the north side of PVDS.There are two 12 "pipes that feed a 42"line that runs under
the golf course then it connects to a 60 "line that outfalls in the ocean.This has been inspected with a camera and is in
good shape They have reestablished the debris barrier above the inlet to the two 12 inch pipes on the north side of
PVDS.
After walking the entire length of the canyon,I am convinced that a large culvert could be placed in the bottom of the
canyon with strategically placed decant towers,that could be designed to be extended as the canyon fills around
them.This storm drain would then connect to the city of LA storm drain with some modifications to extend the 42 "
line to the present invert and still have the ability to capture runoff.I recognize that there are some property issues that
might require som~negotiations for the right of way.
I understand that the slide on the east side of the canyon needs to be addressed.Possibly by installing decant towers in
the storm drain it would remain functional even if the slide fell onto the drain.It might even be possible to put a strong
enough culvert in the bottom of the canyon to dump fill over the top of it to stabilize the slide.The fill could be a money
maker for the city.Stabilize the slide,stop the erosion and create a few jobs for a couple of years while the canyon is
being backfilled with clean fill.
One of the mining properties I worked for used the decant tower system to remove water from the tailings pond.The
earthen dam was 200 feet high and there are people living below the dam.
I would like to take you up on the offer to visit with the city engineer at his convince to discuss this.I will be traveling to
Antarctica for the first two weeks in December,but I am free any time after that that fits his schedule.
Thanks,
Gene Dewey
12/13/2011
2-20
RESOLUTION No.2011--
.ADOPTING THE MITIGATED NEGATIVE
DECLARATION AND FINDING OF No
SIGNIFICANT IMPACT FOR THE SAN RAMON
CANYON STORM DRAIN IMPROVEMENT &
EMERGENCY STABILIZATION PROJECT
2-21
RESOLUTION NO.2011-
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF RANCHO
PALOS VERDES CERTIFYING A MITIGATED NEGATIVE DECLARATION
MAKING CERTAIN ENVIRONMENTAL FINDINGS IN ASSOCIATION WITH
AN ENVIRONMENTAL ASSESSMENT,FOR CASE NO.ZON2011-00326
FOR THE SAN RAMON CANYON STORM DRAIN IMPROVEMENT AND
EMERGENCY SLOPE STABILIZATION PROJECT,AND THE
ASSOCIATED COASTAL PERMIT;LOCATED AT SAN RAMON CANYON
NEAR THE PALOS VERDES DRIVE EAST UPPER SWITCHBACK,
EXTENDING SOUTHERLY UNDER PV DRIVE SOUTH,UNDERGROUND
ALONG THE EASTERN SIDE OF SHORELINE PARK,AND TERMINATING
AT'THE BASE OF THE BLUFF AT THE BEACH BELOW THE PARK IN
THE CITY'S COASTAL ZONE (APN 7564-019-900 &7564-024-901).
WHEREAS,it has been identified that The San Ramon Canyon drainage system
poses ongoing threats to the City of Rancho Palos Verdes and the community below 25th
Street,and access along Palos Verdes Drive South/25th Street is frequently impacted
during and following storm events;and,
WHEREAS,the current San Ramon Canyon drainage system is not capable of
managing large amounts of debris that are generated from within the canyon,and since
storm water generated from the canyon does not have a direct outlet to the ocean,25 th
Street at the mouth of the canyon is impacted by flooding,rock and debris;and,
WHEREAS,as a result of these storm impacts,a project study report was prepared
to identify how best to address the drainage deficiencies;and,
WHEREAS,on July 21,2010,a duly noticed community meeting was held at the
Miraleste Intermediate School auditorium to discuss the proposed storm drain project and
solicit comments from the surrounding residents;and,
WHEREAS,on March 1,2011,the project study report was presented to the City
Council,who identified a preferred alternative design,and directed Staff to solicit
professional services to engineer and design this preferred alternative design,which is
referred to as the San Ramon Canyon Storm Drain Improvement and Emergency Slope
Stabilization Project;and,
WHEREAS,In July 2011,City Staff released an Early Consultation Public Draft
Initial Study/Environmental Assessment for the proposed storm drain improvements to the
general public,and to State and Federal agencies;thereby allowing the resource agencies
an opportunity to review the documents and provide preliminary feedback to the City to
strengthen the document.Further,the document was also made available on the City's
website and a Notice was published in the Peninsula News advertising the availability of
the document.
2-22
WHEREAS,pursuant to the provision of the California Environmental Quality Act,
Public Resources Code Section 21000 et.seq.("CEQA"),the State's CEQA Guidelines,
California Code of Regulation,Title 14,Section 15000 et.seq.,the City's Local CEQA
Guidelines,and Government Code Section 65962.5(F)(Hazardous Waste and Substances
Statement),the City of Rancho Palos Verdes prepared an Initial Study and determined
that,by incorporating mitigatton measures into the Negative Declaration,there is no
substantial evidence that the approval of Case No.ZON2011-00326,otherwise known as
an Environmental Assessment and Coastal Permit,would result in a significant adverse
effect on the environment.Accordingly,a Draft Mitigated Negative Declaration was
prepared and notice of that fact was given in the manner required by law;and,
WHEREAS,pursuant to the provision of the National Environmental Protection Act,
42 U.S.C.4321 et seq.("NEPA"),the City of Rancho Palos Verdes prepared an
Environmental Assessment and determined that,in incorporating mitigation measures into
the project,there is no substantial evidence that the approval of Case No.ZON2011-
00326,otherwise known as an Environmental Assessment and Coastal Permit,would
result in a significant adverse effect on the environment.Accordingly,a Draft Finding of No
Significant Impact was prepared and notice of that fact was given in the manner required
by law;and,
WHEREAS,the Mitigated Negative Declaration/Finding of No Significant Impact and
Initial Study/Environmental Assessment were prepared and circulated for public review
between November 17,2011 and December 19,2011;and,
WHEREAS,on November 16,2011,the City mailed notices to all property owners
within a 500-foot radius from the subject properties upon which the storm drain system will
be constructed on,informing them of the City Council hearing to consider the pending
environmental documents and the Coastal Permit application.Further,the notice was
published in the Peninsula News on November 17,2011;and,
WHEREAS,in accordance with the requirements of CEQA,a Mitigation Monitoring
program has been prepared,and is attached to the MND/FONSI document,and to this
Resolution as Exhibit "A";and,
WHEREAS,copies ofthe Mitigated Negative Declaration were distributed to the City
Council and prior to taking action on the proposed project associated with Case No.
ZON2011-00326,the City Council independently reviewed and considered the information
and findings contained in the Mitigated Negative Declaration and determined that the
document was prepared in compliance with the requirements of CEQA and local
guidelines,with respect thereto;and,
WHEREAS,after issuing notice pursuant to the requirements of the City's
Development Code and the State CEQA Guidelines,the City Council of the City of Rancho
Palos Verdes held a public hearing on December 20,2011,at which time all interested
parties were given an opportunity to be heard and present evidence.
Resolution No.2011-_
Page 22-23
NOW,THEREFORE,THE CITY COUNCIL OF THE CITY OF RANCHO PALOS VERDES
DOES HEREBY FIND,DETERMINE,AND RESOLVE AS FOLLOWS:
Section 1:The proposed project consists of constructing a large diameter (54
inch)steel storm drain system to convey storm water from San Ramon Canyon to the
beach,and will be designed to handle existing upstream flows for a 1OO-year storm event.
The project undertaking includes a new mid-canyon storm drain inlet structure and tunnel
alignment north of PVDS/25th Street that will gravity flow through the tunnel to a cut and
covered section of buried pipe located within a one hundred foot wide easement along the
eastern property boundary at Shoreline Park south of PVDS/25th Street,and transition into
a second tunnel to a new outlet structure at the base of the bluff.
Section 2:The City Council has independently reviewed and considered the
proposed.Mitigated Negative Declaration/Finding of No Significant Impact,the public
comments upon it,and other evidence before the Council prior to taking action on the
proposed project and finds that the Mitigated Negative Declaration/Finding of No
Significant Impact was prepared in the manner required by law and that there is no
substantial evidence that,with appropriate mitigation measures,the approval of Case No.
ZON2011-00326 would result in a significant adverse effect upon the environment.
Section 3:The Initial Study identified the following issue areas that may result in
a potentially significant environmental impact(s)as a result of the proposed project:
Aesthetics,Air Quality,Biological Resources,Hydrology and Water Quality,and
Transportation and Circulation.However,with the appropriate mitigation measures in the
attached Mitigation Monitoring Program (Exhibit "A"),which address impacts upon the
aforementioned issue areas,the project will not have a significant adverse environmental
impact.
Section 4:The City Council finds that the project would not result in significant
adverse environmental impacts.In making this finding,the City Council considered the
project's mitigation measures that address the following issues:
a)Aesthetics:It was identified that the project may result in an aesthetic impact
with regards to the visibility of the outlet structure at the beach,and the
resulting aesthetics of the areas in San Ramon Canyon that will be trenched
to lay the drain pipe and the buttressed fill.The potential aesthetic impacts
have led to the incorporation of mitigation measures that require revegetation
of the impacted areas near the inlet,and stealthing the outlet structure with
natural earth-tone color.Prior to revegetating these areas,the City will
ensure the use of a local native plant seed mix that will be coordinated with
the Palos Verdes Land Conservancy.Incorporation of these mitigation
measures will result in a less than significant impact upon aesthetics.
b)Air Quality:It was identified that the project may result in an air quality
impact with regards to exposing sensitive receptors to short-term,
construction related pollutants,odors and dust.Residences are identified as
Resolution No.2011-_
Page 32-24
a sensitive receptor,and exposure to dust and exhaust emissions from
construction activities was identified as a potential impact.However,this
potential impact has led to the incorporation of mitigation measures that
require the use of Best Management Practices (BMPs),such as watering of
graded areas to minimize dust,for avoiding short-term related air quality
impacts.As such,by incorporating these mitigation measures,there will be
no significant adverse impacts upon air quality.
c)Biological Resources:It was identified that the project may result in a
biological resources impact due to habitat loss of coastal sage scrub and
jurisdictional drainage.Specifically,the project will impact 0.34-acre of
coastal sage scrub,0.02-acre of coastal bluff scrub,and 1.36-acres of
grassland habitat.These habitat losses do not exceed the maximum
accounted by the City's NCCP.
The City's NCCP,which was approved in 2004 by the City Council,creates a
habitat preserved in exchange for allowing a certain amount of habitat loss
resulting from public and private projects over a span of 50 years.One of
the covered projects identified in the City's NCCP is the Lower San Ramon
Canyon Project,which anticipated 2-acres of coastal sage scrub loss and 6-
acres of non-native grassland loss.These anticipated impacts are mitigated
through the dedication of City-owned land into the Preserve and habitat
restoration in the Preserve performed by the Palos Verdes Peninsula Land
Conservancy (PVPLC)for the City.Since the quantity of habitat loss
resulting from the proposed project is within the quantity of loss estimated in
the NCCP,the loss is mitigated pursuant to the City's NCCP.
With regards to the jurisdictional drainage impacts,the storm drain project
will impact O.Ol-acre of jurisdictional drainage.The impacts from the canyon
and jurisdictional fill will be mitigated by post-construction re-vegetation of the
new streambed at a ratio of 3:1,per the requirements of the Army Corps of
Engineers (ACOE).Thus,0.21-acres will be restored through the ACOE's
404 permit process.The City will ensure the use of a local native plant seed
mix that will be coordinated with the applicable agencies prior to re-
vegetating the area.It is important to note that City Staff has been working
with the Army Corps for several months,and the application was submitted
on December 9,2011 to start their approval process.As such,by
incorporating such mitigation measures,there will be no significant adverse
impacts upon biological resources.
d)Hydrology and Water Quality:It was identified that the project may result in
an impact with regards to wastewater discharge and storm water runoff.The
potential impact has led to incorporation of a mitigation measure that
requires preparation and approval of a Standard Urban Storm Water
Mitigation Plan (SUSMP)prior to commencing work on the project.Further,
a Storm Water Pollution Prevention Plan (SWPPP)will be prepared to
Resolution No.2011-_
Page 42-25
address construction storm water runoff,and incorporated into the City's
Water Quality Management Plan as outlined by the Los Angeles Regional
Water Quality Control Board (LARWQCB).It is important to note that City
Staff has also been working with the LARWQCB Staff for several months to
ensure that the necessary information is submitted with the application.As
such,the application was submitted on December 9,2011 to commence
their approval process.Thus,incorporation of a mitigation measure will
result in a less than significant impact upon hydrology and water quality.
e)Noise:It was identified that the project may result in impacts with increased
noise levels as a result of the construction activity.Although the noise
impact will be short-term and related to construction,it has led to
incorporation of mitigation measures that limit hours of construction and the
queuing of construction vehicles.Incorporation of mitigation measures will
result in a less than significant impact upon noise.
f)Transportation and Circulation:It was identified that the project may result in
transportation and traffic impacts with regards to construction activity.As a
result,mitigation measures have been incorporated in the form of traffic
control measures,construction timing and phasing,and queuing of
construction vehicles.As such,by incorporating these mitigation measures,
there will be no significant adverse impacts upon transportation and traffic.
Section 5:In accordance with the requirements of the National Environmental
Policy Act (NEPA),alternatives to the proposed design were considered.Seven alternative
designs were considered,including designs that rely on connecting to the existing storm
drain system in the City of Los Angeles.However,the condition of the existing storm drain
system in the City of Los Angeles is unknown,as no technical information has been
submitted to the City of Rancho Palos Verdes regarding the condition and capacity of the
system.Further,the alternatives have not been well received by the City of Los Angeles,
as the City of Los Angeles Department of Public Works Staff has indicated that such
alternatives which include construction at the mouth of San Ramon Canyon (adjacent to
25th Street)and traversing the privately owned parcel immediately to the north of 25th
Street is not likely due to environmental and jurisdictional constraints at the mouth of San
Ramon Canyon,and due to the impacts to the downstream residents in the mobile home
park during construction.
Based on all alternatives considered,the proposed design has been identified as
presenting the least amount of jurisdictional and native habitat impacts,and eliminates
reliance on other jurisdictions and their processes since the project would be wholly
confined to the City of Rancho Palos Verdes.Further,since the project will be wholly
within the City of Rancho Palos Verdes and on vacant parcels,this design minimizes
impacts to existing residents and to the adjacent mobile home park in the City of Los
Angeles.Furthermore,construction of the proposed project will not necessitate impacting
the existing residential developments in the area.
Resolution No.2011-_
Page 52-26
Section 6:For reasons discussed in the Initial Study,which is incorporated herein
by reference,the proposed project will not have any potential to achieve short-term,to the
disadvantage of long-term,environmental goals,nor would the project have impacts which
are individually limited,but cumulatively considerable.
Section 7:The Lead Agency has consulted the lists compiled pursuant to Section
65962.5 of the Government Code,and has certified that the development project and any
alternatives proposed in this application are not included in these lists of known Hazardous
Waste and Substances Sites as compiled by the California Environmental Protection
Agency.
Section 8:Based upon the foregoing findings,the adoption of the proposed
Mitigated Negative Declaration/Finding of No Significant Impact is in the public interest.
Section 9:The mitigation measures set forth in the Mitigation Monitoring
Program,Exhibit "A",attached hereto,are incorporated into the scope of the proposed
project.These measures will reduce potential significant impacts identified in the Initial
Study to a less than significant level.
Section 10:The time within which the judicial review of the decision reflected in
this Resolution,if available,must be sought is governed by Section 1094.6 of the California
Code of Civil Procedure or other applicable shortened periods of limitation.
Section 11:For the foregoing reasons and based on the information and findings
included in the Staff Report,Environmental Assessment and other components of the
legislative record,in the proposed Mitigated Negative Declaration/Finding of No Significant
Impact,and in the public comments received by the Council,the City Council ofthe City of
Rancho Palos Verdes hereby certifies that the Mitigated Negative Declaration/Finding of
No Significant Impact has been prepared in compliance with CEQA/NEPA,and therefore
adopts the attached Mitigation Monitoring Program (Exhibit "A")associated with Case No.
ZON2011-00326 (Coastal Permit).
PASSED,APPROVED,and ADOPTED this 20th day of December 2011.
MAYOR
ATTEST:
CITY CLERK
STATE OF CALIFORNIA )
Resolution No.2011-_
Page 62-27
COUNTY OF LOS ANGELES )ss
CITY OF RANCHO PALOS VERDES )
I,Carla Morreale,City Clerk of the City of Rancho Palos Verdes,hereby certify that the
above Resolution No.2011-_was duly and regularly passed and adopted by the said City
Council at a regular meeting held on December 20,2011.
Carla Morreale,City Clerk
City of Rancho Palos Verdes
Resolution No.2011-_
Page 72-28
Exhibit A
Mitigation Monitoring Program
Project:San Ramon Canyon Storm Drain Improvement and Emergency Slope
Stabilization Project (Case No.ZON2011-00326,Coastal Permit).
Location:San Ramon Canyon near the PV Drive East upper switchback,extending
southerly under Palos Verdes Drive South,underground through Shoreline Park,
and terminating at the base of the bluff at the beach (APN 7564-019-900 &
7564-024-901),Rancho Palos Verdes,CA 90275
Applicant:City of Rancho Palos Verdes,Public Works Department
Landowner:City of Rancho Palos Verdes
TABLE OF CONTI;NTS
I.Introduction 2
II.Management of the Mitigation Monitoring Program 3
Roles and Responsibilities 3
Mitigation and Monitoring Program Procedures 3
Mitigation Monitoring Operations 3
III.Mitigation Monitoring Program Checklist.,.4
IV.Mitigation Monitoring Summary Table 5
Page 1 Mitigation Monitoring Program
Resolution No.2011-2-29
I.INTRODUCTION
PURPOSE
This Mitigation Monitoring Program (MMP)is to allow the construction of the San Ramon Canyon
Storm Drain Improvement and Emergency Slope Stabilization Project on two City-owned parcels,the
City's Right-of-way,and an outlet at the beach (APN7564-019-900 &7564-024-901),in the City of
Rancho Palos Verdes.The project includes the following:
The installation of a new mid-canyon storm drain inlet near the upper switchback of Palos
Verdes Drive East;tunnel alignment from the mid-canyon inlet north of 25th Street that would
gravity flow through the tunnel to a cut and covered section of buried pipe located south of
Palos Verdes Drive South;and transition into a second tunnel to a new outlet structure at the
base of the bluff at the beach.The total storm drain alignment will measure approximately
4,200 lineal feet.The existing storm drain below 25th Street in the City of Los Angeles would
remain in place and no improvements are proposed to this segment,but will be utilized and
serve as abackup system.
In addition to construction of the inlet structure in the canyon and tunnel,a dirt filled gravity-
type buttress and associated terrace drains would be constructed within the canyon in order to
reduce the potential for future deep-seated movement within the actively failing portion of the
canyon that is caused by the active Tarapaca landslide.The buttress will be established at an
elevation which is similar to the pre-erosion elevation within the canyon.
After construction,the area along Shoreline Park will be restored to enhance the open space
and recreation uses in this area by providing a maintenance access path so that routine
maintenance can be performed by workers as needed.The maintenance access path will also
serve as a connection for pedestrians seeking access to Shoreline Park.The maintenance
access path will connect to the existing trail on Shoreline Park.
The MMP responds to Section 21081.6 of the Public Resources Code,which requires a lead or
responsible agency that approves or carries out a project where a Mitigated Negative Declaration has
identified significant environmental effects,to adopt a "reporting or monitoring program for adopted or
required changes to mitigate or avoid significant environmental effects."The City of Rancho Palos
Verdes is acting as lead agency for the project.
An Initial Study/Mitigated Negative Declaration was prepared to address the potential environmental
impacts of the project.Where appropriate,this environmental document recommended mitigation
measures to mitigate or avoid impacts identified.Consistent with Section 21080 (2)(c)of the Public
Resources Code,a mitigation reporting or monitoring program is required to ensure that the adopted
mitigation measures under the jurisdiction of the City are implemented.The City will adopt this MMP
when adopting the Mitigated Negative Declaration.
ENVIRONMENTAL PROCEDURES
This MMP has been prepared in accordance with the California Environmental Quality Act of 1970
(CEQA),as amended (Public Resources Code Section 21000 et seq.)and the State Guidelines for
Implementation of CEQA (CEQA Guidelines),as amended (California Administrative Code Section
15000 et seq.).This MMP complies with the rules,regulations,and procedures adopted by the City of
Rancho Palos Verdes for implementation of CEQA.
Page 2 Mitigation Monitoring Program
Resolution No.2011-2-30
MITIGATION MONITORING PROGRAM REQUIREMENTS
Section 21081.6 of the Public Resources Code states:"When making the findings required by
subdivision (a)of Section 21081 or when adopting a negative declaration pursuant to paragraph (2)of
subdivision (c)of Section 21081,the public agency shall adopt a reporting or monitoring program for
the changes to the project which it has adopted or made a condition of project approval in order to
mitigate or avoid significant effects on the environment.The reporting or monitoring program shall be'
designed to ensure compliance during project implementation.For those changes which have been
required or incorporated into the project at the request of an agency having jurisdiction by law over
natural resources affected by the project,that agency shall,if so requested by the lead or responsible
agency,prepare and submit a proposed reporting or monitoring program."
II.MANAGEMENT OF THE MITIGATION MONITORING PROGRAM
ROLES AND RESPONSIBILITIES
The MMP for the project will be in place through all phases of the project including final design,pre-
grading,construction,and operation.The City will have the primary enforcement role for the
mitigation measures.
MITIGATION MONITORING PROGRAM PROCEDURES
The mitigation monitoring procedures for this MMP consists of,filing requirements,and compliance
verification.The Mitigation Monitoring Checklist and procedures for its use are outlined below.
Mitigation Monitoring Program Checklist
The MMP Checklist proVides a comprehensive list of the required mitigation measures.In addition,
the Mitigation Monitoring Checklist includes: the implementing action when the mitigation measure will
occur;the method of verification of compliance;the timing of verification;the department or agency
responsible for implementing the mitigation measures;and compliance verification.Section III
provides the MMP Checklist.
Mitigation Monitoring Program Files
Files shall be established to document and retain the records of this MMP.The files shall be
established,organized,and retained by the City of Rancho Palos Verdes department of Planning,
Building,and Code Enforcement.
Compliance Verification
The MMP Checklist shall be signed when compliance of the mitigation measure is met according to
the City of Rancho Palos Verdes Director of Planning,Building,and Code Enforcement.The
compliance verification section of the MMP Checklist shall be signed,for mitigation measures
requiring ongoing monitoring,and when the monitoring of a mitigation measure is completed.
Page 3 Mitigation Monitoring Program
Resolution No.2011-_2-31
MITIGATION MONITORING OPERATIONS
The following steps shall be followed for implementation,monitoring,and verification of each
mitigation measure:
1.The City of Rancho Palos Verdes,Community Development Director and/or Public Works
Director shall designate a party responsible for monitoring of the mitigation measures.
2.The City of Rancho Palos Verdes,Community Development Director and/or Public Works
Director shall provide to the party responsible for the monitoring of a given mitigation measure,
a copy of the MMP Checklist indicating the mitigation measures for which the person is
responsible and other pertinent information.
3.The party responsible for monitoring shall then verify compliance and sign the Compliance
Verification column of the MMP Checklist for the appropriate mitigation measures.
Mitigation measures shall be implemented as specified by the MMP Checklist.During any project
phase,unanticipated circumstances may arise requiring the refinement or addition of mitigation
measures.The City of Rancho Palos Verdes,Community Development Director and/or Public Works
Director with advice from Staff or another City department,is responsible for recommending changes
to the mitigation measures,if needed.If mitigation measures are refined,the Community
Development Director and/or Public Works Director would document the change and shall notify the
appropriate design,construction,or operations personnel about refined requirements.
III.MITIGATION MONITORING PROGRAM CHECKLIST
INTRODUCTION
This section provides the MMP Checklist for the project as approved by the Planning Commission of
the City of Rancho Palos Verdes on December 11,2008.Mitigation measures are listed in the order
in which they appear in the Initial Study.
*
*
*
*
Types of measures are project design,construction,operational,or cumulative.
Time of Implementation indicates when the measure is to be implemented.
Responsible Entity indicates who is responsible for implementation.
Compliance Verification provides space for future reference and notation that
compliance has been monitored,verified,and is consistent with these mitigation
measures.
Page 4 Mitigation Monitoring Program
Resolution No.2011-2-32
MITIGATION MEASURES
A-1:The vegetation within the storm drain
right-of-way (ROW)impacted due to construction will
be replaced.Re-vegetation shall be conducted prior to
permit final,or within 90-days of completing the project,
whichever occurs first.
A-2:The outlet structure at the beach will be designed
and constructed to "hide"the structure to the greatest
extent possible.Specifically, the new outlet structure,
including any riprap and gunite,shall utilize earth-tone
colored concrete to blend with the bluff,in a color to be
approved by the Community Development Director.
A-3:The access roads will be paved with an earth tone
color to blend with the natural surroundings.
AQ-1:During construction,all unpaved construction
areas shall be watered at least twice a day during
excavation and construction to reduce dust emissions
and meet SCAQMD Rule 403 which prohibits dust
clouds to be visible beyond the project site boundaries.
TYPE
Project Design
/Operational
Project Design
/Operational
Project Design
/Operational
Construction
TIME OF
IMPLEMENTATION
Prior to building permit final,
and on-going
Prior to building permit final,
and on-going
Prior to building permit final,
and on-going
On-going during construction
RESPONSIBLE
ENTITY
Property Owner /
applicant.
Property Owner /
applicant.
Property Owner /
applicant.
Property Owner /
Applicant
COMPLIANCE
VERIFICATION
Community
Development
Department
Community
Development
Department
Public Works
Department
AQ-2:During construction,all clearing,grading,earth
moving or demolition activities shall be discontinued
during periods of high winds (Le.,greater than 30
mph),so as to prevent excessive amounts of dust.
AQ-3:During construction,the General contractors
shall maintain and operate construction equipment so
as to minimize exhaust emissions.
AQ-4:A weatherproof notice/sign setting forth the
name of the person(s)responsible for the construction
site and a ohone number(s)to be called in the event
Construction IOn-going during construction I Property Owner /Public Works
Applicant Department
Construction IOn-going during construction I Property Owner /Public Works
Applicant Department
Construction IOn-going during construction I Property Owner /Public Works
Applicant Department
Page 5 Mitigation Monitoring Program
Resolution No.2011-
2
-
3
3
MITIGATION MEASURES
that dust is visible from the site as described in
mitigation measure AQ-1 above,shall be posted and
prominently displayed on the construction fencing.
AQ-5:Trucks shall not park,queue and/or idle at the
project site or in the adjoining public rights-of-way
before 7:00 AM,Monday through Saturday,in
accordance with the permitted hours of construction
TYPE
Construction
TIME OF
IMPLEMENTATION
On-going during construction
RESPONSIBLE
ENTITY
Property Owner /
Applicant
COMPLIANCE
VERIFICATION
Public Works
Department
810-1:To mitigate the impact to the 0.07-acre of
jurisdictional drainage to a less than significant level,a
Landscape Establishment Conformance Mitigation Plan
shall be submitted to the Community Development
Director prior to construction.The Mitigation Plan shall
include the following:
o All related coordination and specification preparation
required to enforce this establishment /mitigation plan
as conditioned by the MND/FONSI and outside
regulatory agencies.
o The plan will include a description of the
enhancement and restoration activities,timelines,plant
palettes,maintenance and monitoring for at least 0.21
acres of jurisdictional impacts.
Monitoring shall include:
o Detailing physical work to be performed by others to
prevent the re-invasion of nonnative plants.
o Prepare annual report after the initial mitigation
implemented,photo documentation from designated
"photo stations."
o Documentation of re-vegetation survival
percentages/sizes/species.
o Direct/document the number and species of
replacement plants (shrubs &trees).
o Documentation of the methods used to assess all
parameters.
o Survival aoals include:minimum of 80%on year one
Operational Prior to commencement of
construction
Property Owner I
Applicant
Community
Development
Department
Page 6 Mitigation Monitoring Program
Resolution No.2011-
2
-
3
4
MITIGATION MEASURES TYPE TIME OF RESPONSIBLE COMPLIANCE
IMPLEMENTATION ENTITY VERIFICATION
and 100%thereafter and/or 75%coverage with native
woody species after 3-years and 90%after 5-years.
Non-native species shall comprise less that 5%of the
cover after 5-years.Monitoring and replacement plants
will be required for the 5-year period mentioned,with
the option of stopping the plan 2-years prior IF all
success criteria is met.Total re-vegetated area will
likely be greater.
BI0-2:To mitigate the potential impact to the Island
Green DUdleya,a preconstruction survey shall be
prepared to determine the presence of said plant
species within the limits of construction.The results of Prior to commencement of Property owner /Community
the survey shall be submitted to the Community Operational construction Applicant Development
Development Director.If the plant species is found to Department
be present and within the limits of the proposed project,
then species relocation shall be conducted to the
satisfaction of the Community Development Director.
BI0-3:To mitigate the potential impact to Southern
Coast Bluff Scrub,a preconstruction survey shall be
prepared to determine the presence of said plant
species within the limits of construction.The results of Prior to commencement of Property owner /Community
the survey shall be submitted to the Community Operational construction Applicant Development
Development Director.If the plant species is found to Department
be present and within the limits of the proposed project,
then species relocation shall be conducted to the
satisfaction of the Community Develooment Director.
HWQ-1:The project shall comply with the requirements
of the statewide National Pollutant Discharge
Elimination System (NPDES)General Permit for Storm
Water Discharges Associated with Construction Activity
to prevent storm water pollution from impacting waters
of the U.S.in the vicinity of the project site.
HWQ-2:In accordance with the Clean Water Act,the
rior to construction,Reaional Water Quality Control
Project design
and operational
Project design
On-going
Prior to building and/or grading
ermit issuance
Property Owner /
applicant
Property Owner /
aoolicant
Public Works
Department
Public Works
Deoartment
Page 7 Mitigation Monitoring Program
Resolution No.2011-
2
-
3
5
MITIGATION MEASURES
Board (RWQCB)the required National Pollutant
Discharge Elimination System (NPDES)permit for the
project shall be obtained.The permit shall be secured
prior to construction.
HWQ-3:Appropriate Best Management Practices
(BMP),including sandbags shall be used by the project
applicant to help control runoff from the project site
during project construction activities.Measures to be
used shall be established prior to construction.
HWQ-4:A Water Quality Management Plan shall be
prepared prior to construction and trenching activity.
HWQ-5:All spills,leaks or other losses of oils and
other hazardous or toxic materials will be immediately
cleaned up.Under no circumstances is any hazardous
or toxic material to be allowed in or near the maintained
drainage channel.
TYPE
Construction
Construction
Construction
TIME OF
IMPLEMENTATION
On-going during construction
On-going during construction
On-going during construction
RESPONSIBLE
ENTITY
Property Owner /
applicant
Property Owner /
applicant
Property Owner /
applicant
COMPLIANCE
VERIFICATION
Public Works
Department
Public Works
Department
Public Works
Department
N-1:Grading and construction activities shall be limited
to the hours of 7:00am and 7:00pm,Monday through
Saturday.There shall be no construction on Sundays
or federallv observed holidavs.
N-2:During demolition,construction and/or grading
operations,trucks shall not park,queue and/or idle at
the project site or in the adjoining public rights-of-way
before 7:00 AM,Monday through Saturday,in
accordance with the permitted hours of construction
stated above.
Construction
Construction
On-going.
On-going.
Property Owner /
applicant.
Property Owner /
applicant
Public Works
Department
Public Works
Department
Page 8 Mitigation Monitoring Program
Resolution No.2011-
2
-
3
6
MITIGATION MEASURES TYPE TIME OF RESPONSIBLE COMPLIANCE
IMPLEMENTATION ENTITY VERIFICATION
roads are open during construction to at least one lane applicant.Department
of traffic in two directions,with the use of flaggers..
T-2:Open trenches will be covered with steel plates Construction On-going during construction Property Owner /Public Works
during non-working hours.applicant Department
T-3:During construction,the City shall provide
alternative parking areas and verify that residents within
the mobile home park on 25th Street can enter and exit Construction On-going during construction Property Owner /Public Works
the street at all times.The City will also facilitate good applicant Department
communication with residents through public notices of
impacted parking areas and construction times.
Page 9 Mitigation Monitoring Program
Resolution No.2011-
2
-
3
7
RESOLUTION No.2011-
APPROVING THE COASTAL PERMIT FOR THE
SAN RAMON CANYON STORM DRAIN
IMPROVEMENT &EMERGENCY STABILIZATION
PROJECT
2-38
RESOLUTION NO.2011-
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF RANCHO
PALOS VERDES CONDITIONALLY APPROVING CASE NO.ZON2011-
00326 FOR A COASTAL PERMIT FOR THE SAN RAMON CANYON
STORM DRAIN IMPROVEMENT AND EMERGENCY SLOPE
STABILIZATION PROJECT THAT WILL TRAVERSE THE CITY'S
SHORELINE PARK PROPERTY AND OUTLET AT THE BASE OF THE
BLUFF AT THE BEACH BELOW THE PARK IN THE CITY'S COASTAL
ZONE (APN 7573-014-013).
WHEREAS,it has been identified that The San Ramon Canyon drainage system
poses ongoing threats to the City of Rancho Palos Verdes and the community below 25th
Street,ar.ld access along Palos Verdes Drive South/25th Street is frequently impacted
during and following storm events;and,
WHEREAS,the current San Ramon Canyon drainage system is not capable of
managing large amounts of debris that are generated from within the canyon,and since
storm water generated from the canyon does not have a direct outlet to the ocean,25 th
Street at the mouth of the canyon is impacted by flooding,rock and debris;and,
WHEREAS,as a result of these storm impacts,a project study report was prepared
to identify how best to address the drainage deficiencies;and,
WHEREAS,on July 21,2010,a duly noticed community meeting was held at the
Miraleste Intermediate School auditorium to discuss the proposed storm drain project and
solicit comments from the surrounding residents;and,
WHEREAS,on March 1,the project study report was presented to the City Council,
who identified this preferred alternative design,and directed Staff to solicit professional
services to engineer and design this preferred alternative design,which is referred to as
the San Ramon Canyon Storm Drain Improvement and Emergency Slope Stabilization
Project;and,
WHEREAS,In July 2011,City Staff released an Early Consultation Public Draft
Initial Study/Environmental Assessment for the proposed storm drain improvements to the
general public,and to State and Federal agencies;thereby allowing the resource agencies
an opportunity to review the document and provide preliminary feedback to the City to
strengthen the document.Further,the document was also made available on the City's
website and a Notice was published in the Peninsula News advertising the availability of
the document.
WHEREAS,pursuant to the provision of the California Environmental Quality Act,
Public Resources Code Section 21000 et.seq.("CEQA"),the State's CEQA Guidelines,
California Code of Regulation,Title 14,Section 15000 et.seq.,the City's Local CEQA
Guidelines,and Government Code Section 65962.5(F)(Hazardous Waste and Substances
Statement),the City of Rancho Palos Verdes prepared an Initial Study and determined
2-39
that,by incorporating mitigation measures into the Negative Declaration,there is no
substantial evidence that the approval of Case No.ZON2011-00326,otherwise known as
an Environmental Assessment and Coastal Permit,would result in a significant adverse
effect on the environment.Accordingly,a Draft Mitigated Negative Declaration was
prepared and notice of that fact was given in the manner required by law;and,
WHEREAS,pursuant to the provision of the National Environmental Protection Act,
42 U.S.C.4321 et seq.("NEPA"),the City of Rancho Palos Verdes prepared an
Environmental Assessment and determined that,in incorporating mitigation measures into
the project,there is no substantial evidence that the approval of Case No.ZON2011-
00326,otherwise known as an Environmental Assessment and Coastal Permit,would
result in a significant adverse effect on the environment.Accordingly,a Draft Finding of No
Significant Impact was prepared and notice of that fact was given in the manner required
by law;and,
WHEREAS,the Mitigated Negative Declaration/Finding of No Significant Impact and
Initial Study/Environmental Assessment were prepared and circulated for public review
between November 17,2011 and December 19,2011;and,
WHEREAS,on November 16,2011,the City mailed notices to all property owners
within a 500-foot radius from the subject properties upon which the storm drain system will
be constructed on,informing them of the City Council hearing to consider the pending
environmental documents and the Coastal Permit application.Further,the notice was
published in the Peninsula Newson November 17,2011;and,
WHEREAS,in accordance with the requirements of CEQA,a Mitigation Monitoring
program has been prepared,and is attached to the MND/FONSI document,and to
Resolution No.2011-_,as Exhibit "A";and,
WHEREAS,copies of the Mitigated Negative Declaration were distributed to the City
Council and prior to taking action on the proposed project associated with Case No.
ZON2011-00326,the City Council independently reviewed and considered the information
and findings contained in the Mitigated Negative Declaration and determined that the
document was prepared in compliance with the requirements of CEQA and local
guidelines,with respect thereto;and,
WHEREAS,after issuing notice pursuant to the requirements of the City's
Development Code and the State CEQA Guidelines,the City Council of the City of Rancho
Palos Verdes held a public hearing on December 20,2011,at which time all interested
parties were given an opportunity to be heard and present evidence.
NOW,THEREFORE,THE CITY COUNCIL OF THE CITY OF RANCHO PALOS VERDES
DOES HEREBY FIND,DETERMINE,AND RESOLVE AS FOLLOWS:
Section 1:The proposed project consists of constructing a large diameter (54
inch)steel storm drain system to convey storm water from San Ramon Canyon to the
beach,and will be designed to handle existing upstream flows for a 1OO-year storm event.
2-40
The project undertaking includes a new mid-canyon storm drain inlet structure and tunnel
alignment north of PVDS/25th Street that will gravity flow through the tunnel to a cut and
covered section of buried pipe located within a one hundred foot wide easement along the
eastern property boundary at Shoreline Park south of PCDS/25th Street,and transition into
a second tunnel to a new outlet structure at the base of the bluff.
Section 2:The City Council finds that the request for a Coastal Permit to allow
the development project within the "appealable area"of the City's Coastal Zone is
warranted for the following reasons:
A.The project is consistent with the Coastal Specific Plan.The subject property is
located within Subregion 8 of the City's coastal zone,as established by the
Rancho Palos Verdes Coastal Specific Plan,and is designated as a natural
.open space area.The project includes a maintenance access path that will also
serve to facilitate pedestrian access from PV Drive South/25th Street,to
Shoreline Park at the northeastern portion of the site.As such,it is consistent
with Coastal Specific Plan Policy NO.4 for Subregion 8,which states in part,
"Encourage ...at least two walkways:one from 25th Street along the eastern
portion of the site;the other access point should align with the City's trail in
Subregion 7."
The project is also consistent with policies nos.1 and 4 in the Natural
Environment Element of the Coastal Specific Plan,which state:
Policy NO.1:"Allow only low intensity activities within [CRM-1]."
Policy NO.4:''Allow non-residential structures not requiring significant
excavation or grading within Coastal Resource Management Districts within
[CRM-4]..."
The Park site falls within general categories established by the Coastal Specific
Plan called Coastal Resource Management districts.The Park falls within CRM-
1 (Extreme Slope),CRM-4 (Marginally Stable)and CRM-9 (Wildlife Habitat)of
the Coastal Specific Plan Natural Environment Element.Consistent with the
aforementioned policies,the project is considered low intensity since it will not
result in an intensification of use of the property,and it will not be visible since
the drainage system will be wholly underground.Further,the project entails a
non-residential structure,which after some excavation,will be covered and re-
vegetated so that the infrastructure is not visible.
Lastly,the project is consistent with the specific criteria/purpose of each of the
Coastal Resource Management districts (Le.,CRM-1,CRM-4 and CRM-9
districts).Each CRM is as follows:
CRM-1 (Extreme Slope)indicates that "the retention of natural topographic
conditions is important and nonstructured uses such as passive parks,trails,
agriculture,etc.,are appropriate."
2-41
CRM-4 (Marginally Stable)indicates that the "preferred land use would
include recreational facilities such as picnic areas,hiking trails ...and only
small,nonpermanent units not requiring significant earthwork,such as picnic
shelters,are desirable".
CRM-9 ("Wildlife Habitat)indicates that "it is important to review any
proposed development within or adjacent to wildlife habitat districts for the
nature of the impact upon the wildlife habitat and possible mitigation
measures to fully offset any impacts."
The detailed geologic and biology reports have concluded that the new system
will not negatively impact the area since the storm drain system will prevent
uncontrolled erosion of the bluff face and the alignment will be re-vegetated,
.which would be consistent with and/or furthers the aforementioned standards of
the CRM-1,CRM-4 and CRM-9 districts.In addition,although there will be
permanent loss of coastal bluff scrub as a result of the project,these impacts
have been mitigated by the City's NCCP Subarea Plan,which requires that a
certain amount of habitat be restored within the City's nature Preserve.
The proposed project will also facilitate access to the site and the trail network
on Shoreline Park.Further,the project will not alter the uses on the site and will
continue to operate as a park facility with passive recreational opportunities.
Lastly,the new outlet will be located at the base of the bluff at the beach where
it will discharge storm water to the ocean.With the outlet located at the beach
below,it will prevent damage and erosion ofthe coastal bluff.Further,although
the storm drain system would carry sediment during storm events that would
directly outlet to the ocean,it is not anticipated that the sediment will adversely
impact coastal resources since the system will collect water from a natural
canyon upslope.Therefore,Staff believes that the proposed project is consistent
with the Coastal Specific Plan.
B.The proposed project,when located between the sea and the first public road,is
consistent with applicable public access and recreation policies of the Coastal
Act.The proposed storm drain project will traverse the eastern side of Shoreline
Park,which is an open space park parcel between the sea and the first public
road.The public access policies of the Coastal Act (Chapter 3,Article 2)
generally require the provision of public coastal access as a condition of new
development.However,30212(b)(S)of the Coastal Act exempts maintenance
activities such as this storm drain system from the definition of "new
development."Notwithstanding,public coastal access would be maintained and
would not be hindered since the storm drain system would be below ground.
Consequently, access would be improved since a new maintenance access path
would be installed at the northeastern portion of the park site,which will also
serve to improve the current pedestrian accessibility to the site from along PV
Drive South/2Sth Street.Further,with respect to the recreation policies of the
Coastal Act (Chapter 3,Article 3),the subject property is designated and
2-42
functions as an unimproved park,and will continue to provide for reasonable
passive coastal recreation.
Section 3:The time within which the judicial review of the decision reflected in
this Resolution,if available,must be sought is governed by Section 1094.6 of the California
Code of Civil Procedure and other applicable shortened period of limitations.
Section 4:For the foregoing reasons and based on the information and findings
included in the Staff Report,Environmental Assessment and other components of the
legislative record,in the proposed Mitigated Negative Declaration/Finding of No Significant
Impact,and in the public comments received by the City Council,the City Council of the
City of Rancho Palos Verdes hereby approves Case No.ZON2011-00326 subject to the
conditions in Exhibit A attached hereto,thereby allowing a Coastal Permit to allow the
constructi,on of the San Ramon Storm Drain Improvement Project and the associated outlet
structure within the appealable area of the City's Coastal Zone.
PASSED,APPROVED,and ADOPTED this 20 th day of December 2011.
MAYOR
ATTEST:
CITY CLERK
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES )ss
CITY OF RANCHO PALOS VERDES )
I,Carla Morreale,City Clerk of the City of Rancho Palos Verdes,hereby certify that the
above Resolution No.2011-_was duly and regularly passed and adopted by the said City
Council at a regular meeting held on December 20,2011.
Carla Morreale,City Clerk
City of Rancho Palos Verdes
2-43
EXHIBIT "A"
CONDITIONS OF APPROVAL
CASE NO.ZON2011-00326
(ENVIRONMENTAL ASSESSMENT AND COASTAL PERMIT)
1.This permit shall be valid for a period of one (1)year from the date of the City's final
action on this application.
2.This approval is for the Coastal Permit associated with the San Ramon Canyon Storm
Drain Improvement and Emergency Slope Stabilization Project,as presented and
approved by the City Council on December 20,2011.
3.Construction of the storm drain project shall be substantially consistent with the
project approved by the City Council on December 20,2011.However,the Director
of Public Works,and/or the Director of Community Development is authorized to
approve minor modifications to the project or any of the conditions if such
modifications achieve substantially the same results as would strict compliance with
said project and conditions.
4.All mitigation measures contained in the Mitigation Monitoring Program contained in
the Mitigated Negative Declaration for the San Ramon Storm Drain Improvement and
Emergency Slope Stabilization Project,as certified by the City Council on December
20,2011 by adoption of Resolution No.2011-_,shall be incorporated into the
implementation of the proposed project and adhered to,and are incorporated herein
by reference.
5.The new outlet structure,including any riprap and gunite,shall utilize earth-tone
colored concrete to blend with the bluff,in a color to be approved by the Director of
Community Development.
6.Prior to re-vegetation activities of the disturbed areas,the City shall coordinate with
the Palos Verdes Land Conservancy or other similar organization as deemed
appropriate by the City,to ensure the use of a local native plant seed mix.
7.Unless absolutely necessary for the immediate protection of public health and safety,
the construction activities associated with the construction of the storm drain shall not
unreasonably interfere with existing lateral public coastal access along the shoreline.
8.Permitted hours and days for construction activity are 7:00 AM to 7:00 PM,Monday
through Saturday,with no construction activity permitted on Sundays or on the legal
holidays specified in Section 17.96.920 of the Rancho Palos Verdes Development
Code.
9.Trucks shall not park,queue and/or idle at the project site or in the adjoining public
rights-of-way before 7:00 AM,Monday through Saturday,in accordance with the
permitted hours of construction stated in Condition NO.9 above.
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10.Failure to comply with any condition(s)of approval of this permit,or conducting any
activity that is beyond the scope of this permit,as determined by the City at its sole
discretion,shall be grounds for suspension or revocation of this permit.The City will
generally provide notification of a violation and direction to the applicant to correct the
violation within twenty-four (24)hours of the notice.However,the City shall not be
obligated to provide such notice,particularly when imminent health and safety issues
are involved.
11.Prior to the commencement of grading,the applicant shall retain a qualified
paleontologist and archeologist to monitor grading and excavation.In the event
undetected buried cultural resources are encountered during grading and excavation,
work shall be halted or diverted from the resource area and the archeologist and/or
paleontologist shall evaluate the remains and propose appropriate mitigation
mea.sures.
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INITIAL STUDy/ENVIRONMENTAL ASSESSMENT,
AND
MITIGATED NEGATIVE DECLARATION/FINDING
OF No SIGNIFICANT IMPACT
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San Ramon Canyon Storm Drain Tunnel Project
SCH # 2011071084
NEPA Environmental Assessment and Finding
of No Significant Impact
CEQA Initial Study and Mitigated Negative
Declaration
City of Rancho Palos Verdes, California
Prepared For:
Harris & Associates
34 Executive Park, Suite 150
Irvine, CA 92614
Contact: Randall Berry, P.E.
(949) 655-3900 x314
On behalf of the
City of Rancho Palos Verdes
Public Works Dept.
30940 Hawthorne Blvd.
Rancho Palos Verdes, CA 90275
Contact: Alan Braatvedt, P.E.
(310) 544-5253
Prepared By:
SFC Consultants
65 Post, Suite 1000
Irvine, CA 92168
Contact: Saundra F. Jacobs REA
(949) 348-1233
November 16, 2011
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TABLE OF CONTENTS
Section Page
1.0 Introduction 6
1.1 Project Location 7
1.2 Project Purpose and Need 9
1.3 Project Goals 12
1.4 Description of the Undertaking/Project Description 12
1.5 Cumulative Effects 26
1.6 Proposed Funding Source 29
1.7 Alternatives Analysis 29
1.8 Community Outreach 33
1.9 Interagency Coordination and Consultation 35
1.10 Project Sponsors and Contact Persons 35
1.11 Source Documents 37
2.0 Existing Environment/Setting 38
2.1 Biological Resources 39
2.1.1 Determination of Significance 39
2.1.2 Regulations 39
2.1.3 Jurisdictional Drainages and Wetlands 42
2.1.4 Existing Plant Communities 46
2.1.5 Sensitive Plant Resources 49
2.1.6 Sensitive Wildlife Resources 54
2.1.7 Biological Resource Avoidance and Mitigation 57
2.2 Cultural Resources 60
2.2.1 Regulatory Setting 60
2.2.2 Regional Archaeological Studies 61
2.2.3 Records Search 61
2.2.4 Cultural Resource Survey/Field Recon 61
2.2.5 Native American Consultation 62
2.2.6 State Historic Preservation Officer 62
2.2.7 Paleontological Resources 63
2.2.8 Cultural Resource Avoidance and Mitigation 63
2.3 Geology – Soils – Seismicity 64
2.3.1 Regulatory Setting 64
2.3.2 Geologic Setting 64
2.3.3 Subsurface Conditions 65
2.3.4 Groundwater 66
2.3.5 Faulting and Seismicity 66
2.3.6 Geologic Hazards 66
2.3.7 Geologic Avoidance and Mitigation 67
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TABLE OF CONTENTS, CON’T
Section Page
2.4 Hydrology/Water Quality/Flood Control 68
2.4.1 Existing Hydrologic Setting 68
2.4.2 Coastal Zone/Coastal Barrier Resources 68
2.4.3 Water Quality and Storm water Runoff 70
2.4.4 Sole-source Aquifer/Drinking Water Supplies 72
2.4.5 Flood Control 72
2.4.6 Hydrologic Avoidance, Minimization and Mitigation 72
2.5 Air Quality 73
2.5.1 Federal Regulatory Setting 73
2.5.2 Climate 74
2.5.3 Air Quality Management 74
2.5.4 Ambient Air Quality 75
2.5.5 Storm Term Construction Activity 75
2.5.6 Greenhouse Gases and Global Climate Change 77
2.5.7 Air Quality Resources Avoidance and Mitigation 79
2.6 Noise Resources 79
2.6.1 Regulatory Setting 79
2.6.2 Noise Impact Avoidance and Mitigation 80
2.7 Traffic and Circulation 80
2.7.1 Vehicular Networks 80
2.7.2 Public Transportation 81
2.7.3 Path and Trail Networks 81
2.7.4 Traffic Impact Avoidance and Mitigation 81
2.8 Land Use 81
2.8.1 Land and Water Conservation Fund 82
2.8.2 Environmental Justice 82
2.8.3 Growth 82
2.8.4 Land Use Impact Conclusions 83
2.9 Visual Resources 83
2.9.1 Regulatory Setting 83
2.9.2 Visual Resource Mitigation 83
2.10 Hazardous Materials/Hazardous Waste 84
2.10.1 Regulatory Setting 84
2.10.2 Project Summary and Conclusions 85
3.0 Area of Potential Affect/Project Impacts/Mitigation 86
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TABLE OF CONTENTS, CON’T
Section Page
Photos:
Photo 1 Aerial of canyon 9
Photo 2 View north up San Ramon Canyon 10
Photo 3 View from PVDE toward Tarapaca Landslide 11
Photo 4 Aerial view of San Ramon Canyon 11
Photo 5 View northeast up San Ramon Canyon from W. 25th St. 12
Photo 6 View north up San Ramon Canyon from canyon bottom 13
Photo 7 View south down San Ramon Canyon from canyon bottom 15
Photo 8 Photo before buttress fill 16
Photo 9 Photo simulation after buttress fill 16
Photo 10 View north toward cut and cover area 20
Photo 11 View south toward cut and cover area 20
Photo 12 View off coastal bluff near outlet area 21
Photo 13 Photo simulation of outlet structure 22
Photo 14 Existing outlet structure for McCarrell Canyon storm drain 23
Photo 15 Areas of project access and impacts 25
Photo 16 Jurisdictional drainage 43
Photo 17 Island green dudleya on bluff near project area 51
Photo 18 Photo simulation of outlet structure 84
Photo 19 Photo simulation of post construction buttress fill and re-vegetation 84
Figures
Figure 1 Regional Map 8
Figure 2 Vicinity Map 8
Figure 3 Inlet Structure plan and profile 14
Figure 4 Buttress fill plan and profile 15
Figure 5 Canyon fill terminus plan and profile 17
Figure 6 Permanent access road cross section 18
Figure 7 Permanent access road plan and profile 19
Figure 8 Cut and cover lower trench plan and profile 21
Figure 9 Lower tunnel and outlet structure 22
Figure 10 Trail and construction access 24
Figure 11 Alternative 1 30
Figure 12 Alternative 2 31
Figure 13 Alternative 5 32
Figure 14 Topographic map 38
Figure 15 NCCP map 41
Figure 16 Plant Communities, upper section 47
Figure 17 Plant Communities, lower section 48
Figure 18 Hydrology Map 69
Figure 19 Flood Insurance Rate Map 73
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TABLE OF CONTENTS, CON’T
Section Page
Tables
Table 1 Excavation Quantities 26
Table 2 Project Alternatives 34
Table 3 Habitat Impact Areas 58
Appendices
CEQA NEPA Initial Study Checklist (Attached to EA/MND)
1. Site Plans
2. Maps
3. Biological Resources
4. Cultural Resources
5. Geologic Resources
6. Hydrologic Resources
7. Visual Resources
8. Hazardous Materials
9. Public Consultation
10. Alternatives
This report is intended only for the use of Harris and Associates, in care of the City of Rancho Palos Verdes, and should not be relied
upon by other parties without the express written consent of SFC Consultants. The findings are relevant to the dates of our site work
and should not be relied upon to represent site conditions on other dates
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1.0 Introduction
In October 2010, SFC Consultants (SFC) completed an expanded CEQA Initial Study for six (6)
different storm drain alignments and tunnel alternatives for San Ramon Canyon drainage. Adverse
impacts associated with each alternative were reviewed, and a preferred alternative was selected by
the City of Rancho Palos Verdes. This proposed storm drain tunnel alignment project is the
preferred alternative which will be analyzed under both CEQA and NEPA guidelines.
This Draft MND/FONSI addresses the general storm drain backbone canyon design, landslide
creep, new ocean outfall, and the environmental impacts associated with them. This backbone
system will augment the existing system which currently drains San Ramon Canyon into the storm
drain below W. 25th Street in the City of Los Angeles, flows under the homes and golf course to the
south, and discharges via an existing outlet pipe in the bluff and ocean. This existing storm drain
and outlet is currently permitted by the City of Los Angeles Municipal Storm water Permit
administered by the LA County Flood Control District. The existing system will remain in place
and function as a back-up overflow system. The City anticipates that the existing ocean discharge
system will only be needed during very heavy rains as a secondary or back-up device.
The objectives of this document is to review and address environmental impacts associated with the
planning, construction and operation of storm drain and tunnel improvement designed to convey the
100-year storm flood flows from San Ramon Canyon. Environmental mitigation measures have
been incorporated in the project description.
The City of Rancho Palos Verdes, in compliance with the California Environmental Quality Act
(CEQA) as amended, and National Environmental Protection Act (NEPA) as amended, requires
CEQA/NEPA documentation consistent with the Project Study Report for the drainage of San
Ramon Canyon. The NEPA portion of the document has been included because of the potential for
Federal financial assistance. As such, this environmental document will be a combination of both
State and Federal environmental review requirements. The NEPA portion of the document will
include several alternatives that were outlined in the original Initial Study and cumulative impacts
as applicable.
This document has been prepared in compliance with the California Environmental Quality Act of
1970 (CEQA), as amended (Public Resources Code, Section 21000, et seq.), and the State
Guidelines for Implementation of the California Environmental Quality Act of 1970 (California
Code of Regulations, Title 14, Section 15000, et seq.), as amended in 2010. This report also
generally complies with the rules, regulations, and procedures for implementation of the California
Environmental Quality Act adopted by the City of Rancho Palos Verdes.
CEQA
A Mitigated Negative Declaration (MND) is the appropriate CEQA document based on CEQA
Article 6, Section 15070(b)1, Decision to prepare a Negative Declaration. This CEQA section
states the following:
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Section 15070(b)1
A proposed negative declaration shall be prepared for a project subject to CEQA when the
initial study identified potentially significant effects but:
Revisions in the project plans or proposals made by or agreed to by the applicant
before the proposed negative declaration is released for public review would
avoid the effects or mitigate the effects to a point where clearly no significant
effects would occur.
NEPA
An Environmental Assessment and Section 4(f) evaluation with Findings of No Significant Impact
(FONSI) is required for compliance with NEPA Section 1508.9.
Section 1508.9
Concise public document for which a Federal agency is responsible that serves to:
1) Provide sufficient evidence and analysis for determining whether an EIS or
FONSI is needed; 2) Aid an agency’s compliance with the Act when no EIS is
necessary; 3) Facilitate preparation of an EIR when one is necessary.
This document was prepared by SFC Consultants, a qualified environmental consulting firm under
contract to Harris & Associates, the consulting engineers for the project, who is under contract with
the City of Rancho Palos Verdes. The City of Rancho Palos Verdes is the Lead Agent for the
project as defined by Section 21067 of CEQA. This Initial Study was prepared under the direction
of City staff and represents the independent judgment from the City. A copy of the Initial Study
and its determinations are included in the Appendix. All environmental issues as identified by the
City in the Initial Study and Environmental Assessment, and consistent with the California
Environmental Quality Act and National Environmental Protection Act, will be analyzed in this
MND/FONSI.
1.1 Project Location
The project area is located within the south eastern portion of the City of Rancho Palos Verdes, Los
Angeles County, California. The site is generally bound by Palos Verdes Drive East (PVDE) on the
west, Calle Aventura and Tarapaca Road to the north, Friendship Regional Park and the City of Los
Angeles boundary to the east, and the Pacific Ocean to the south (Figures 1 and 2, Photo 1).
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Figure 1: Regional Map
Figure 2: Vicinity Map
Project
areas
Site
North
North
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Photo 1 Aerial photo
1.2 Project Purpose and Need
The City of Rancho Palos Verdes has determined that the existing San Ramon Canyon drainage
system does not work effectively. Flooding of the W. 25th Street area is primarily due to the
existing clogged and buried storm drain inlet (Photo 2 below) which collects only a minimal amount
of surface water during a storm event. The existing inlet structure is a 48-inch diameter pipe
system. The resulting flow of water is forced to cross W. 25th Street/Palos Verdes Drive South
(PVDS), carrying with it boulders, mud and other debris across the W. 25th Street roadway and into
the mobile home properties to the south. For safety and to protect property, a new “backbone”
drainage system for San Ramon Canyon is proposed. The project is an independent utility with
logical termini. The San Ramon Canyon storm drain project is intended to serve a necessary
drainage purpose to prevent degradation of topsoil, property damage, and avoid a hazard to public
safety. Further, the storm drain project will minimize road closure of PV Drive South/W. 25th
Street (one of only three major arterials that connect the City of Rancho Palos Verdes with the
regional transportation system) during storm events.
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Photo 2: View north up San Ramon Canyon from W. 25th Street. Existing storm drain inlet structure in foreground.
Erosion and flash flood episodes within San Ramon Canyon ranges from moderate to severe. Areas
of severe erosion are generally in the area of the Tarapaca landslide and downstream (Photo 3). The
episodic and active downslope movement of the Tarapaca landslide is forcing the flowline of the
canyon to shift westerly, causing increased erosion of the western walls of the canyon. These
canyon walls are directly downslope of the switchbacks of PVDE, in particular, the lower
switchback (Photo 4). The PVDE switchbacks are a significant ingress and egress for residents,
commuters and emergency personnel. Based on the geotechnical documentation, and discussed in
more detail later in this document, the canyon walls are eroding at an average rate of about 5 feet
per year. The existing slope face would only need to erode back approximately 35 feet before the
road way would be in a state of imminent failure.
Moderate to severe erosion of the canyon walls and floor due to heavy flow of surface water and
flash flooding during rains has caused deep cutting of the canyon, in some areas generating vertical
cuts up to 30 feet in height (Photo 6). Instability of these cuts is triggering surficial failures and
toppling of the vertical walls. Buttress filling of the canyon and the proposed storm drain will
reduce the rate of erosion within the canyon, reduce the flow of water and debris down the canyon,
and reduce the movement of the Tarapaca landslide.
In addition to providing needed storm drain capacity, another major project objective will be to
reduce the depth and duration of flooding along San Ramon Canyon thus reducing the need for
reoccurring maintenance by City crews to remove sediment and debris from the roadway,
which is primarily due to the inadequate size of the existing inlet structure and debris basin, and
inadequate size of portions of the existing storm drain pipe. This will also assist in achieving
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the project goal, outlined below, of improving both emergency vehicle access and local
residence access and safety both during and after storm events.
Photo 3: View from PVDE toward the east side of Canyon toward Tarapaca landslide.
Photo 4: Aerial view of San Ramon Canyon
Tarapaca Landslide
Palos Verdes Drive E
North
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1.3 Project Goals
Protect the health, safety and welfare of the community from flooding events.
Protect area families and property.
Improve both emergency vehicle access and local residence access and safety,
during and after storm events for W. 25th Street and from the PVDE switchbacks.
Minimize reoccurring city maintenance by reducing depth and duration of flooding.
Stabilize the Tarapaca landslide.
Stabilize Palos Verdes Drive East switchbacks.
Preserve the coastal bluffs and reduce erosion.
Minimize local community impact during construction.
1.4 Project Description/Description of the Undertaking
The project undertaking would include a new mid-canyon storm drain inlet structure and tunnel
alignment north of W. 25th Street that would gravity flow through the tunnel to a cut and covered
section of buried pipe located south of W. 25th Street, and transition into a second tunnel to a new
outlet structure at the base of the bluff. Total storm drain alignment is approximately 4,200 lineal
feet of 54” diameter pipe from inlet to outlet. Total tributary area draining into the new storm drain
would be 123.7 acres. The existing 48” storm drain below W. 25th Street would remain in place and
serve as backup as necessary. No improvements or cleaning are proposed to the existing storm
drain system, which is located in the City of Los Angeles. A more detailed description of the
undertaking and photos are provided below. Post construction photo simulations are included in the
visual resource section 2.9.
Photo 5: View northeast toward mouth of San Ramon Canyon from W. 25th Street/PVDS.
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Photo 6: View north up San Ramon Canyon, western wall of canyon.
Detailed Description of the Undertaking/Project
Inlet Structure. The inlet structure and storm drain project would be designed to handle existing
upstream flows for a 100-year storm event. It would also provide for a restored streambed, taking
advantage of infiltration and biological pollutant uptake available in the new riparian system and
lower canyon area. Excavation of the inlet structure improvements would require approximately
1,250 cubic yards (cy) of fill, approx. 660 cy of cut, and encompass approx. 200 lineal feet of the
canyon. These excavation quantities include a small amount of hand trenching needed for a terrace
drain along the eastern canyon slope adjacent to the inlet structure. Figure 3 below provides an
engineering plan and profile for the inlet structure. Larger scale plans are attached to the
appendices for convenience. These plans help to show the depth of canyon fill needed to not only
direct storm flows into the new tunnel system, but provide canyon wall buttressing, as discussed
below.
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Figure 3: Inlet Structure plan and profile.
Buttress Fill. In addition to construction of the inlet structure in the canyon and tunnel, a dirt filled
gravity-type buttress and associated terrace drains would be constructed within the canyon in order
to reduce the potential for future deep-seated movement within the actively failing portion of the
canyon that is caused by the active Tarapaca landslide. This gravity buttress will be created by
filling portions of the canyon floor approximately 20 to 30 feet in depth from the inlet structure, to a
point downstream of the existing Tarapaca landslide area for a distance of approximately 900-feet,
tapering down to join the existing canyon bottom (Figures 4 and 5, Photos 6, 7, 8 and 9).
Approximately 51,000 cy of excavated fill will be needed and will primarily come from the tunnel
spoils. The resulting surface area of fill will be approximately 2.75 acres. The fill will be placed on
a thin drainage layer of crushed rock, with a filter fabric layer to prevent the fine particles from
clogging the sub-soil drainage system. The canyon fill will be placed in engineered layers to lock it
into the existing canyon walls. Un-grouted rip rap will be placed into the new, elevated, stream-bed
and the flattened slopes will be hydro-seeded with an approved native plant mix in combination
with jute mesh, fiber roles and other recommended erosion control measures that will allow the
plants time to establish a root system. This filled canyon area will ultimately become the mitigation
area for re-establishment of jurisdictional impacts and other plant species impacted during
construction. This mitigation will be monitored through a Landscape Establishment Conformance
Plan, and is described in further detail in Section 3.0.
North
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Photo 7: View south down San Ramon Canyon near buttress fill area.
Figure 4: Buttress fill plan and profile.
North
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Photo 8: Before photo of buttress fill location. View north up San Ramon Canyon.
Photo 9: After Photo simulation of buttress fill and established re-vegetation.
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Figure 5: Canyon fill terminus plan and profile.
Construction Access Roads north of W. 25th Street. This project would require construction of two
access roads north of W. 25th Street in order to access the canyon. The first access road location
was developed after several alternative storm drain alignments. Construction access to the canyon
from the east would require significant remedial grading due to the location of the Tarapaca
Landslide.
The first access road would be constructed from the northern-most switchback of PVDE in order to
access the canyon for construction of the inlet structure. This access road would be approximately
350-feet in length and, due to the steepness of the slope, would be stabilized in place utilizing a
retaining wall. Approximately 2,400 cy of cut and 500 cy of fill will be required for the permanent
access road. The retaining wall would vary in height from 0-feet at the access road entrance at
PVDE, to a maximum of 12.5-feet midway down the slope. Immediately behind the retaining wall
will be a 2-foot gutter with wall drain and pipe dome per Caltrans standards. The access road itself
is proposed to be 17-feet in width which includes 14-feet of road, 2-feet of K-rail on the downward
slope side of the road, and 1-foot of shoulder on the downward slope side of the k-rail. The access
road would gently slope westward, away from the canyon, so that no storm water flows directly
over the road and into the canyon. Over excavation of the canyon wall will be required in order to
properly place the retaining wall and associated access road appurtenances. Excavated dirt would
then be replaced at no greater than a 2:1 slope. Retaining wall and access road detail in Figures 6
and 7.
North
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Figure 6: Perm. access road cross section.
Because of the extensive engineering and construction required of this access road and retaining
wall, this first access road would be subsequently paved after construction with neutral colors and
serve as the permanent maintenance road for the City. The permanent access road must be paved in
order to avoid uncontrolled infiltration of water into the canyon from storm events and to support
maintenance of the inlet.
The second construction access road was chosen due to the minimal amount of grading that would
be required due to the existing underground sewer line easement in the same location. Therefore,
the second access road would be located on the southern side of the southern-most switchback of
PVDE, and provide temporary access for the buttress fill portion of the project. Access from this
location will be considerably easier and require little or no grading. Construction vehicles will be
able to travel over the existing terrain. At the project’s completion, this second temporary access
road would be re-vegetated with the native mix hydro seed. Construction of both access roads
would likely coincide with commencement of the tunnel drilling operations.
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Figure 7: Permanent Access road plan and profile.
Tunnel and Cut and Cover Pipe. A large diameter tunnel will be constructed from the inlet structure
to a point below the steep slopes, south W. 25th Street, approximately 1,900 feet in length.
Approximately 3,000 cy of dirt will be cut for the tunnel and used in the buttress fill. A pipe will be
installed in this tunnel and the annular space between the pipe and tunnel will be filled by pumping a
cement-slurry into the space. The pipe from the storm drain tunnel will connect to a section of pipe
that will be installed using a cut and cover method of installation (Figure 8, Photos 10 and 11). The
cut and cover pipe extends approximately 1,900 feet to a point just a couple of hundred feet from the
ocean bluff top where it will connect to another tunnel, approximately 300 feet in length, to the
outlet structure (Figure 9, Photos 12, 13 and 14). The cut and cover pipe section will be located
within the existing 100’ wide utility easement and required approximately 7,090 cy of excavated cut.
After construction, this area will be restored to enhance the open space and recreation uses in this
area.
North
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Photo 10: View north toward 100’ wide easement, cut and cover area.
Photo 11: View south toward 100’ wide easement, cut and cover area.
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Figure 8: Cut and cover lower trench plan and profile.
Outlet Structure. The outlet structure would be located above the high tide line and connected from
the second tunnel, approximately 300 feet in length. Excavation of 660 cy of cut and 285 cy of fill
are anticipated for the outlet structure. The beach apron will include large beach boulders to
dissipate flow velocities and protect the beach from erosion. Construction related runoff will be
confined to the beach and will not enter the ocean. Planned access to the outlet structure for
construction is discussed in further detail below.
Photo 12: View of coastal bluff near outlet area. Facing west.
North
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Figure 9: Lower tunnel and outlet structure.
Photo 13: Outlet structure photo simulation.
North
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Photo 14: Existing outlet structure for McCarrell Canyon storm drain.
Construction Access south of W. 25th Street. Construction access south of W. 25th Street/PV Drive
South (PVDS) will come through an existing utility road from the adjacent mobile home park to the
east. The City and contractor will be required to obtain permission from the trailer park association
for access through their community from W. 25th Street. Preliminary discussions between the City
and the mobile home park association have indicated a willingness to accommodate the access.
However, if permission cannot be obtained, secondary access to this area can be accommodated via
W. 25th Street/PVDS. In this second access scenario, the existing trail within the utility easement
would be graded into gentle switch backs to allow construction equipment to access this section of
the storm drain. However, regardless of where construction access is obtained, after construction of
the storm drain project, the switch back trail will remain as a public access casual trail that creates a
gateway to this open space parcel (Figure 10). The finished trail will be consistent with the City-
wide NCCP and would be located wholly within the existing 100-foot wide utility easement.
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Figure 10: Trail and construction access switchback.
Construction of the outlet structure will require access from the Royal Palms State Beach in San
Pedro, California (Photo 15). The park is approximately 1 mile south of the project. Access from
this park would follow the beach line at low tide. No grading will be required for construction
equipment to travel along the shore. The project will not extend into the coastal waters, and no
impacts to fish or wildlife are expected to occur with the implementation of Best Management
Practices by the contractor during construction.
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
Photo 15: Areas of project access and impacts.
Construction Staging. Construction staging would occur within the existing 100’ wide utility
corridor south of W. 25th Street near the proposed lower tunnel launching pit. A smaller staging area
will be located near the northern PVDE switchback where the first canyon access road will be
located.
Traffic Control. Traffic control measures during construction will be implemented to maintain
continuous through-traffic and emergency access on Palos Verdes Drive East and along W. 25th
Street/PVDS.
Construction Schedule. Construction of the entire project is estimated to take approximately 17
months from completion to end. The tunneling portions of the project would likely start first, both at
the bluff and at the launch pit just south of W. 25th Street. Construction of the outlet structure will
be predicated on avoiding high tides and seasonal storms. Drilling would continue northward to the
inlet structure location. Tunneling operations typically start at the lowest elevation to take advantage
of gravity for the dirt spoils. The access roads and buttress fill areas will commence when the
tunneling is complete.
Excess Excavated Materials. It is anticipated that much of the excess spoils from tunneling
operations would be used for the buttress fill needed in the canyon. Excess excavated materials that
cannot be used due to the dirt quality, or is not needed, would be disposed of by 3rd party dirt
brokers. No excess dirt will be deposited on the beach.
Operation and Maintenance after Construction. Future maintenance of the facility after
construction will follow measures covered in the City’s NCCP section 5.4.
Beach access for outletOutlet structure
Canyon grading
Cut and cover trench
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
TABLE 1
Excavation quantities
Location Lineal
Feet
Cut
CY
Fill
CY
Canyon Inlet Structure 200 ft. 660cy 1,250 cy
Canyon Tunnel 1,900
ft.
3,000 cy -
Buttress Fill and Terrace drains 900 ft. 50,110 cy
Access/maintenance road 350 ft. 2,400 cy 500 cy
Lower trench for cut and cover
section of buried pipe
1,900
ft.
7,090 cy -
Lower Tunnel 300 ft. Included in canyon
tunnel quantity.
-
Outlet structure 50 ft. 660cy 285 cy
1.5 Cumulative Effects
Consistent with NEPA requirements for cumulative analysis, cumulative impacts shall be discussed
where they are significant and reflect the level and severity of the impacts and the likelihood of
occurrence, but not in as great a level of detail as that necessary for the project alone. Cumulative
impacts are the results of incremental impacts on the environment from the action when added to
other past, present, and reasonably foreseeable future actions regardless of what agency (federal or
non-federal) or person undertakes such actions. Cumulative impacts can result from individually
minor but collectively significant actions taking place over time (40 C.F.R. § 1508.7).
The City began analyzing cumulative effects of the project by reviewing the impacts of the
Proposed Action and alternatives on the specific environmental resources presented in Section 2.0.
The City then identified past, present, and reasonably foreseeable future actions that could
contribute to cumulative effects on each resource, and defined an area of analysis and timeframe for
the potential cumulative effects for each resource.
The City used a variety of sources to identify and collect information on past, present, and
reasonably foreseeable actions in the project area that could contribute to cumulative effects. These
include:
City and County flood control and storm water reports
City and/or County General Plans
Project Hydrology Report
Existing environmental documents
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City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
The City also contacted various public agencies by phone and in person in conjunction with projects
that could contribute to cumulative effects.
Los Angeles County Flood Control District, Department of Public Works
City of Los Angeles Public Works Department
California Department of Transportation.
As a result, the City concluded the following projects in the vicinity that were recently completed in
the past 2 years and/or planned by either the City of RPV or the County of Los Angeles:
San Ramon Sewer Relocation (sewer relocated adjacent to PVDS in 2011).
San Ramon storm drain catch basin connection south of W. 25th Street.
McCarrell Canyon Storm Drain (Past storm drain located north of San Ramon). Similar
analysis and impacts.
1. Resources considered in the cumulative impact analysis.
The environmental resources listed in Table 2 (on page 34) were considered in the
cumulative impact analysis, primarily because of their significance and applicability in this
environmental information document.
Biological-Fish/Wildlife/Threat.-Endangered Species-Wetlands-Coastal Zone/Barrier
Resources-Wild and Scenic Rivers-Protected Farmlands/Agriculture & Forestry
Resources
Cultural Resources/Native Americans/SHPO
Geology/Soils/Liquefaction
Hydrology/Water Quality-Floodplain/Storm Water-Sole Source Aquifer/Drinking Water
Supplies
Air Quality/GHG
Noise
Traffic/Circulation
Land Use-Land-Water Conservation Fund-Env. Justice Geo. Assess./Relocation Impacts
Visual Resources
Hazardous Materials/Hazardous Waste
Public Services/Utilities
2. Define the geographic boundary or Resource Study Area (RSA) for each resource to be
addressed in the cumulative impact analysis.
Hydrology/Water Quality-Floodplain/Storm Water-Sole Source Aquifer/Drinking Water
Supplies-The RSA for assessing hydrologic impacts encompasses 123.7 acres of surface area
for the project.
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
The RSA for assessing the balance of these impacts encompasses an area of approximately 5
acres. The estimated 5 acres includes 2.75 acres of permanent surface area after the buttress
fill and access road.
3. Describe the current health and the historical context of each resource.
Each resource noted above has the same health and historical context and will therefore be
assessed collectively in Table 2.
4. Identify the direct and indirect impacts of the proposed project that might contribute to a
cumulative impact on the identified resources.
Although construction of the storm drain project will be completed within approximately 6
months, storm drain construction will not create direct or indirect impacts that might
contribute to a cumulative impact to the resources listed in Section 1.5 #1 above. See Table
2 for cumulative and alternative impact comparison.
5. Identify the set of other current and reasonably foreseeable future actions or projects and
their associated environmental impacts to include in the cumulative impact analysis.
The City’s engineering consultant has analyzed the existing storm drain system through as-
built plans from the Los Angeles County Flood Control District and has determined that the
downstream storm drain system in the City of Los Angeles is insufficient to receive the flows
from San Ramon Canyon, which has led to constant flooding and road closures of W. 25th
Street during rain events. Major improvements would be needed by the City of Los Angeles
to upgrade the existing storm drain system, as noted in Alternative #5.
6. Assess the potential cumulative impacts.
Based on the type of construction project, the cumulative impacts listed in Table 2 will be
less than significant with mitigation incorporated.
Long term cumulative effects of the project will be beneficial to hydrology and flooding
because the new storm drain will direct and channel storm flows into the storm drain, rather
than down the canyon, across the street, and into adjacent residences.
7. Report the results of the cumulative impact analysis.
Based on the cumulative impacts reviewed in Table 2 for the affected resources, impact
results are primarily considered
Less than significant with mitigation incorporated to:
Hydrology/Water Quality
Coastal Zone/Barrier Resources
Fish/Wildlife/Threatened-Endangered Species/Wetlands
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
Visual Resources
Noise
Traffic/Circulation
Air Quality/GHG
Less than significant to:
Land Use/Land-Water Conservation Fund
Geology/Soils/Liquefaction
Cultural Resources/Native Americans/SHPO
Haz. Mat/Waste
No Impact to:
Sole Source Aquifer/Drinking Water Supplies
Wild and Scenic Rivers
Protected Farmlands/Agriculture & Forestry Resources
Env. Justice Geo. Assess./Relocation Impacts
Beneficial to:
Floodplain/Storm Water
8. Assess the need for mitigation and/or recommendations for actions by other agencies to
address a cumulative impact.
No additional mitigation, other than that listed in this document, is required by other agencies
to reduce impacts to less than significant levels.
1.6 Proposed Funding Source
Project costs for the storm drain are approximately $19-$20 million. The City has been
recommended on a draft list to receive funding from the Department of Water Resources for a
Storm Water Flood Management Grant (Proposition 1E) in the amount of $9.4 million (50% of the
estimated cost). The City has to date, spent approximately $1.5 million on various emergency
repairs in this vicinity which will offset future storm drain construction costs. The City is prepared
to fund the remaining $8 million from other local, state and federal sources.
1.7 Alternatives Analysis
The requirement that alternatives be considered for a proposed action is required by NEPA. The
alternatives discussed below were developed to meet the purpose and needs of the project by the
City of Rancho Palos Verdes. Although all impacts with the proposed project are mitigated to less
than significant levels, alternatives were also analyzed to avoid resource impacts to wetlands,
floodplains, endangered species, etc.
Alternative 1: Up Gradient Strom Drain with Tunnel – This storm drain alternative is an upper-
canyon inlet with “tunnel alignment”, similar to the proposed project. It has a tributary area of 98
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
acres that would outlet to the ocean. This option would connect the new system to the existing
storm drain system at the head of the canyon (Figure 11). No landslide stabilization or buttressing
of the canyon walls would be proposed, so the continued threat of deep-seated movement from the
Tarapaca landslide would still be present. Erosion of the canyons walls may be slowed with the
new storm drain, but not eliminated. This alignment is all within the City of Rancho Palos Verdes.
Alternative 1 inlet structure would impact approximately 0.08 acres of jurisdiction drainage and
0.50 acres of Coastal sage scrub habitat, buckwheat-dominated. Any additional habitat impacts
would be limited to grassland only. This alternative would also impact approximately 0.02 acres of
bluff which consists of a small amount of Southern coastal bluff scrub. This alternative is
consistent with applicable State, regional and local habitat conservation plans and programs but
would have slightly greater biological impacts.
Figure 11: Inlet structure for Alternative 1.
Alternative 2: Mid Canyon Storm Drain to 25th Street Storm Drain – This alternative is a mid-
canyon inlet with “canyon fill alignment” storm drain, which would discharge into the existing 25th
Street Storm Drain (Figure 12). The tributary area at the proposed inlet is 123.7 acres. This inlet
structure would collect surface water into a subsurface storm drain system consisting of a 48-inch
diameter pipe system with a 12-inch diameter underlying the subdrain system. Construction of the
storm drain system would include placing fill within the majority of the canyon in order to restore
the ground surface to “pre-erosion” conditions and to mitigate the over-steepened canyon walls and
failing areas. This system would tie into the existing insufficient system that underlies W. 25th
Street; therefore it is not likely that this alternative will alleviate future flooding events onto W. 25th
Street. This alignment is primarily within the City of Rancho Palos Verdes, but also partially within
the City and County of Los Angeles.
Alternative 2 inlet structure and buried drainage improvements would impact approximately 0.74
acres of jurisdiction drainage and approximately 0.50 acres of Coastal sage scrub habitat,
buckwheat-dominated. Any additional habitat impacts would be limited to grassland only. No
impact to the beach bluff will occur with this alternative. This alternative is partially consistent
with applicable State, regional and local habitat conservation plans and programs. The City of Los
Angeles does not have a proposed or adopted NCCP for potential project impacts.
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
Figure 12: Inlet structure for Alternative 2.
Alternative 3: Up Gradient Storm Drain to 25th Street Storm Drain – This alternative proposes an
upper-canyon inlet (similar to Alt. 1) with “canyon fill alignment” (similar to Alt. 2) storm drain
which discharges into the existing inefficient W. 25th Street storm drain, rather than a tunnel. This
alternative would help to stabilize the Tarapaca Landslide movement from further erosion of the
canyon walls. This alternative will not alleviate future flooding events onto W. 25th Street without
upgrading the City owned storm drain. This alignment is primarily within the City of Rancho Palos
Verdes, but also partially within the City and County of Los Angeles.
Alternative 3 inlet structure and buried drainage improvements would impact all 0.81 acres of the
jurisdiction drainage and approximately 0.50 acres of Coastal sage scrub habitat, buckwheat-
dominated. Any additional habitat impacts would be limited to grassland only. No impact to the
beach bluff will occur with this alternative. This alternative is partially consistent with applicable
State, regional and local habitat conservation plans and programs but would have greater
environmental impacts than the proposed alternative. The City of Los Angeles does not have a
proposed or adopted NCCP for potential project impacts in this area.
Alternative 4: Upsizing of the 25th Street Storm Drain System – This alternative would upsize the
25th Street storm drain inlet structure and downstream piping. Up sizing of the existing storm drain
would require replacement of the entire line from the inlet structure, through the mobile home park
and golf course, and a new enlarged outlet structure. This alternative would include grading of a
retention basin at the entrance to the canyon to slow down storm flows before they enter the existing
storm drain. The retention basin would result in the greatest impacts to jurisdictional waters over a
smaller area because most of the qualifying jurisdictional waters are at the mouth of the canyon.
Large boulders and rip rap would be placed up the canyon to slow storm flows before they reach the
inlet structure and stabilize the Tarapaca Landslide from continued failures. The City of LA has
indicated in past meetings with the City of RPV that upsizing the San Ramon storm drain is not
likely due to environmental and jurisdictional constraints at the mouth of San Ramon Canyon and
impacts to downstream residents during construction. This alternative is not consistent with
applicable State, regional and local habitat conservation plans and programs. The City of Los
Angeles does not have a proposed or adopted NCCP for potential project impacts in this area.
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San Ramon Canyon Storm Drain
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Alternative 5: Upsizing of the 25th Street Storm Drain Inlet Structure only – This alternative would
upsize the 25th Street storm drain inlet structure but would not upgrade the entire pipe system as
discussed in Alternative 4. This alternative would include grading of a retention basin at the
entrance to the canyon to slow down storm flows before they enter the existing storm drain. The
retention basin would result in the greatest impacts to jurisdictional waters over a smaller area
because most of the qualifying jurisdictional waters are at the mouth of the canyon. Large boulders
and rip rap would be placed up the canyon to slow storm flows before they reach the inlet structure.
This rip rap may or may not extend to the Tarapaca Landslide. Therefore the problem of continued
erosion of the canyon walls would not be solved. The City of LA has indicated in past meetings
with the City of RPV that upsizing the San Ramon storm drain is not likely due to jurisdictional
environmental constraints at the mouth of San Ramon Canyon. This alternative is not consistent
with applicable State, regional and local habitat conservation plans and programs. The City of Los
Angeles does not have a proposed or adopted NCCP for potential project impacts.
Figure 13: Alterative 5
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San Ramon Canyon Storm Drain
IS/EA FONSI MND
Alternative 6: Cleaning of the W 25th Street Storm Drain Inlet Structure - This alternative would
simply dig out all the debris at the mouth of San Ramon Canyon adjacent to W. 25th Street in the
City of Los Angeles. The City of LA has indicated in past meetings that any grading in this area is
not likely due to environmental constraints at the mouth of the canyon. This alternative is partially
consistent with applicable State, regional and local habitat conservation plans and programs.
Alternative 7: No Impact/No Cost Alternative - This alternative would balance the continued risks
associated with flooding, both in terms of life and property. The alternative would continue to
require maintenance after a flood event to clean up the streets.
Alternative Summary
Based on the alternatives reviewed, when compared to the proposed project, the proposed project
presents the least amount of jurisdictional and native habitat impacts.
1.8 Community Outreach/Public Participation
The proposed project is not considered controversial and is not anticipated to generate public
controversy. Families that live in the single family homes on the northeast side of the canyon,
above the Tarapaca landslide, are very supportive of the project. The following community
outreach and public notification was conducted by City staff and the consultant team.
July 21, 2010: Residents located within the surrounding communities and those potentially
impacted by any temporary construction impacts along Palos Verdes Drive East, were publicly
noticed within the local newspaper and significant signage was placed at key intersections near
the project area. On the evening of July 21, 2010, a community meeting was held at the
Miraleste Intermediate School auditorium, to discuss the proposed project and solicit comments
from the surrounding residents. A list of those residents/owners and owner representatives
present at the meeting are attached to this document. Approximately 75 residents as well as City
officials and members of the design engineering and environmental team were in attendance.
Comment cards were also distributed at the meeting and have been attached to this document.
July 14, 2011: The draft Initial Study was issued to the California State Clearinghouse for
distribution to affected resource agencies during the early consultation. Copies were also made
available at the City of RPV.
July 15, 2011: The City of RPV published the draft Initial Study on their web site.
July 28, 2011: On July 28, 2011, the City of RPV published a Notice for Early Consultation on
the City’s website. Subsequently, the notice was published in the Palos Verdes Peninsula News
on July 28, 2011. The notice provided the public with a 30-day comment period to submit
comments on the environmental issues that should be addressed in the MND/FONSI.
November 16, 2011: Pending distribution of draft MND/FONSI.
INITIAL STUDY ATTACHMENT-33
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No Impact No ImpactNo Change from Existing Conditions INITIAL STUDY ATTACHMENT-34
SFC
Solutions for
Compliance
35
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
1.9 Interagency Coordination and Consultation Activities/Crosscutters
The following agencies were consulted by phone, mail or in person.
State Historic Preservation Office: The SHPO office was submitted a project package
via mail, including the cultural resource study, survey results and Native American
consultation. Approval from SHPO is pending.
California Department of Transportation: Caltrans was contacted by phone with regard
to proposed alternative solutions for storm flows. Caltrans will likely require
encroachment permit(s) for any work done in, over or under W. 25th Street.
Los Angeles County Flood Control District: The LACFCD was contacted numerous
times by phone and via several meetings with the City of Rancho Palos Verdes Project
engineer with regard to future improvements to the San Ramon canyon storm drain at W.
25th Street. The county has indicated, as documented in the Alternative #5, that
improvement to the storm drain at San Ramon canyon is not feasible at this time due to
environmental constrains to wetlands and jurisdictional habitat.
The storm drain tunnel project, as proposed, will be located further up the canyon and not
impact the lower jurisdictional area.
City of Los Angles Public Works Department: The City of Los Angeles participated in
at least 1 early meeting with the City of RPV and via numerous phone calls by the City of
RPV project engineer. The City of LA is supportive of the City of RPV’s storm drain
actions because the City of LA does not have the funding sources to improve the storm
drain at W. 25th Street.
1.10 Project Sponsors and Contact Persons
The City of Rancho Palos Verdes is the applicant and lead agent for the preparation of this
CEQA/NEPA document. The following agencies, organizations and individuals are associated with
this project in the capacities indicated:
Lead Agency/Applicant:
Mr. Alan Braatvedt, P.E
KOA Corp., consultant to the City of Rancho Palos Verdes
Public Works Dept.
30940 Hawthorne Blvd.
Rancho Palos Verdes, CA 90275
(310) 544-5253
INITIAL STUDY ATTACHMENT-35
SFC
Solutions for
Compliance
36
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
Environmental Consultant:
SFC Consultants
65 Post, Suite 1000
Irvine, CA 92618
Ms. Saundra Jacobs, R.E.A.
(949) 348-1233
Design Engineers
Harris & Associates
34 Executive Park, Suite 150
Irvine, CA 92614
Contact: Randall Berry, P.E.
(949) 655-3900 ext. 2314
Biological Resources:
(biological assessment)
Natural Resources Assessment c/o
SFC Consultants
3415 Valencia Hill Drive
Chino, CA
Ms. Karen Kirkland
(909) 686-1141
(California gnatcatcher survey)
Rincon Consultants, Inc. c/o
SFC Consultants
180 North Ashwood Avenue
Ventura, CA 93003
Cultural Resources:
Historical Environmental Archaeological Research Team c/o
SFC Consultants
8701 Lava Place
West Hills, CA 91304
(818) 340-6676
Geotechnical Engineer
GMU Geotechnical Inc.
23241 Arroyo Vista
Rancho Santa Margarita, CA 92688
Ms. Lisa Bates-Seabold, PG, CEG
949-888-6513
INITIAL STUDY ATTACHMENT-36
SFC
Solutions for
Compliance
37
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
1.11 Source Documents/References:
1. Air Resources Board, Cal EPA, Urban Forest Greenhouse Gas Protocols.
2. California Agricultural Land Evaluation and Site Assessment Model, 1997.
3. City of Rancho Palos Verdes Citywide NCCP, URS, July 2004.
4. City of Rancho Palos Verdes General Plan.
5. City of Rancho Palos Verdes Local Coastal Program.
6. GMU Geotechnical, Inc. Preliminary Geotechnical Study Report for San Ramon Canyon
Storm Drain System, City of Rancho Palos Verdes, CA. Sept. 27, 2010.
7. Harris & Associates, Hydrology and Hydraulics Study for San Ramon Canyon Storm
Drain. Pending Final.
8. Historic Environmental Archaeological Research Team, Phase I Archaeological Study,
Aug. 2011.
9. Native American Heritage Commission, Aug. 10, 2010.
10. Natural Resources Assessment, Wetlands Delineation, Biological Report, Sept. 2010.
11. Rincon Consultants, Coastal California Gnatcatcher Focused Survey Report, Aug. 2011.
12. Santa Monica Bay Watershed Management Area, and 303(d) lists.
13. South Central Coastal Information Center, August 25, 2010.
INITIAL STUDY ATTACHMENT-37
SFC
Solutions for
Compliance
38
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
2.0 Existing Environment/Setting
The project area is generally undeveloped as seen in the photos in Section 1.0. The canyon floor is
generally used by hikers. There is one shelter/cave area (use unknown) approximately one-third of
the way up the canyon. An existing sewer line is located between PVDE and the canyon slope.
Overhead utility lines are located on the east side of the canyon. PVDE is located to the west, and
W. 25th Street roadways to the south. Single family residences are located upslope of the upper
portions of San Ramon Canyon, and the Palos Verdes Shores mobile home park to the south of W.
25th Street.
The major topographical feature within the project site is San Ramon Canyon, which trends
generally north-south. Prior to development, this canyon extended to the Pacific Ocean. However,
during construction of 25th Street, the lower portion of the canyon was buried and the flow of water
was collected into a storm drain system that begins at W. 25th Street and extends down to the ocean.
Currently, the inlet structure that is the upstream terminus of the system has been buried by debris.
The remaining portions of the project site consist of gentle to very steep slopes, with the steeper
slopes found within the canyon. The topography of the project site is generally controlled by the
large ancient landslide that comprises the majority of the site. This landslide, the South Shores
landslide, is considered dormant having no documented movement in 10,000 years.
Figure 14: Topographic map of project area.
INITIAL STUDY ATTACHMENT-38
SFC
Solutions for
Compliance
39
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
2.1 Biological Resources
A General Biological Resources Assessment and Jurisdictional Delineation was prepared for the
San Ramon Canyon Storm Drain Improvements on September 29, 2010 by Natural Resources
Assessment (NRA) of California. Supplemental information was also reviewed on the City’s
Natural Communities Conservation Planning Subarea Plan, prepared by URS and dated July 2004.
A focused California gnatcatcher survey was conducted per California Department of Fish and
Game protocol during the breeding season in April and May 2011. Findings from that report are
provided below.
Review of information on plant and wildlife species known to occur within the vicinity of
the project.
Reviewed of available information provided by technical references, SFC Consultants
and the City of Palos Verdes.
Field survey on September 29 and 30, 2010.
Review of the Rancho Palos Verdes Citywide Natural Community Conservation Plan.
2.1.1 Determination of Significance
The determination of significance is based on the status of the species, the habitat type, and
coverage under other regulatory mechanisms such as the Federal Endangered Species Act, the
Clean Water Act, the California Department of Fish and Game 1600 Streambed regulations, and
other legislation. Negative impacts to listed species are a mandatory finding of significance,
regardless of the extent or type of impact. Impacts to protected habitats are generally considered
significant, and are usually covered under other regulations such as the 404 and 1602 regulations,
including a Local Coastal Program (LCP).
For the determination of the level of significance to sensitive but non-listed resources, the
California Environmental Quality Act (CEQA) requires that the impact be such that the habitat
of the protected resource will be substantially degraded or reduced, cause a wildlife population to
drop below self-sustaining levels, or that the plant or animal community will be eliminated.
CEQA also finds that the impacts are significant if there are cumulative effects from future
probable projects.
2.1.2 Regulations
Citywide Natural Community Conservation Plan
On August 31, 2004, the City Council conceptually approved a Citywide Natural Community
Conservation Plan (NCCP) Subarea Plan that identifies Biological Resource Areas and
establishes habitat preserves. The Subarea Plan is currently being reviewed by the Resource
Agencies (Federal and State), and is pending final approval in 2012. The subarea plan for the
project is also consistent with the criteria in Section 10(a) of the Federal Endangered Species
Act.
INITIAL STUDY ATTACHMENT-39
SFC
Solutions for
Compliance
40
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
IS/EA FONSI MND
According to the NCCP, the City anticipated the need to repair or improve drainage systems in
areas of the City that are not located within the Portuguese Bend Landslide Area or the Palos
Verdes Drive East drainage study area. It also anticipated that some of these drainage projects
would necessitate work in habitat areas, and estimated that these City projects would result in a
cumulative combined loss of 10 acres of CSS habitat and 24 acres of non-native grassland. The
development of the NCCP included all the relevant provisions of the Local Coastal Program.
Any requirements under the LCP are part of the NCCP.
The improvement of San Ramon Canyon was addressed as part of the development of the NCCP
(excepted below). The project area falls within the NCCP Switchbacks, and Shoreline Park
Preserve Properties. All impacts, other than impacts to jurisdictional waters, are covered by the
provision of that document and no additional mitigation for those impacts is required.
Section 3 from NCCP: “19. Lower San Ramon Canyon Repair (Proposed) It is
anticipated that the City will need to do some remedial grading in Lower San Ramon
Canyon to prevent a landslide from blocking water flow in the canyon. Geologic studies
have identified a landslide in the canyon that has the potential to create blockage of the
stream flow. Blockage of the stream flow could cause water to percolate into the
adjacent South Shores Landslide. It is estimated that the grading activity would result in
the loss of 2.0acres of CSS habitat and 6.0 acres of non-native grassland. The City
proposes 6.0 acres of offsite CSS mitigation and 3.0 acres of offsite non-native grassland
mitigation (city property dedication)”.
Switchback Preserve Property
The Switchback Preserve Property encompasses the San Ramon canyon inlet structure,
tunnel and buttress fill. Vegetation designations include Grassland and Coastal Sage
Scrub (CSS) – undifferentiated. The biological assessment prepared for the project
substantiated the grass land habitat on Figure 15. However, while CSS is shown on the
NCCP maps at the inlet structure and buttress fill locations, the biological field survey
resulted in no CSS in these areas.
The switchback preserve property map also indicates several historic sightings of the
Palos Verdes Blue Butterfly. However, based on the biological assessment, field survey
and California gnatcatcher survey conducted, no PVBB habitat was observed. Therefore
no PVBB special survey was conducted.
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Figure 15: NCCP Preserve Properties, Switchbacks
Shoreline Park Preserve Property
Shoreline Park, with its conservation easements, is the mitigation area for the Tarapaca
HCP. The biological values immediately along the dirt road south of W. 25th Street/Palos
Verdes Drive East are minimal, appearing to consist of mostly non-native plants
established during past re-vegetation efforts. West of this area, the park is most
Grassland, except for a large stand of Coastal Sage Scrub habitat along the extreme
western boundary of the park. This Coastal Sage Scrub habitat would not be impacted
with the proposed storm drain project. The City will be required to issue a Coastal
Permit for the project under the requirements of the Local Coastal Plan.
Coastal Zone Management Act
The project outlet structure is located in the coastal zone. The coastal zone for the City of RPV
extends seaward of PVDS. The Coastal Zone Management Act (CZMA) of 1972 is the primary
federal law enacted to preserves, protects, develops, restores and enhances coastal zone
resources. The CZMA directs the states to develop Coastal Zone Management Programs
(CZMP) to protect coastal resources within state borders, including wetlands.
California has developed a coastal zone management plan and has enacted its own law, the
California Coastal Act of 1976, to protect the coastline. The policies established by the
California Coastal Act are similar to those for the CZMA; they include the protection and
Project Area
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expansion of public access and recreation, the protection, enhancement and restoration of
environmentally sensitive areas, protection of agricultural lands, the protection of scenic beauty,
and the protection of property and life from coastal hazards. The California Coastal Commission
is responsible for implementation and oversight under the California Coastal Act. The
Commission has delegated the management of coastal zones to local governmental entities,
requiring them to develop a Local Coastal Plan (LCP) for coastal resources within their
boundaries.
The City of Rancho Palos Verdes has developed a Coastal Specific Plan (CSP) per the
requirements of the CZMA and the California Coastal Commission requirements. The CSP
defines the areas of sensitivity for biological resources and other resources (such as fire) along
the coastline and offshore waters. For this project, the coastal zone area is the portion of the
project seaward of the lower PVDS switchback. As noted above, compliance with the CSP will
require issuance of a Coastal Permit for this project.
Coastal Resource Management District
The proposed storm drain lies within a Coastal Resource Management (CRM) District with a
terrestrial designation of CRM-10. This is an area that contains other natural vegetation areas,
meaning that this District has some terrestrial wildlife value. The offshore waters in this CRM
are protected under the LCP as a marine preservation area, meaning that all marine resources
must be protected against impacts. They include kelp beds, abalone habitat, rock reef habitat and
their associated wildlife. Mitigation has been incorporated into the construction methodology
along the shore to comply with the LCP and protect marine resources.
Coastal Barrier Resources Act (CBRA)
The Coastal Barrier Resources Act (CBRA) is managed by the Federal Emergency Management
Agency (FEMA) and implemented by the US Fish and Wildlife Service. The CBRA restricts
development on the Coastal Barrier Resources System (CBRS) which serves as an important
buffer between coastal storms and inland areas. Coastal barriers also provide a protective habitat
for aquatic plants and animals. Implementation of the LCP and Coastal Permit for the portion of
the project seaward of PVDS will be required to comply with the CBRA.
2.1.3 Jurisdictional Drainages and Wetlands
U. S. Army Corps of Engineers (ACOE)
The ACOE regulatory jurisdiction pursuant to Section 404 of the Clean Water Act is founded on
a connection or nexus between the water body in question and interstate (waterway) commerce.
This connection may be direct, through a tributary system linking a stream channel with
traditional navigable waters used in interstate or foreign commerce, or may be indirect, through a
nexus identified in the Corps regulations. The Corps also regulates navigable waters, defined as
waters “that are, could be, or were used to transport interstate or foreign commerce” (Cylinder, et
al 2004). These waters are regulated under Sections 9 and 10 of the River and Harbors Act. The
ACOE regulates discharges of dredged or fill material into waters of the United States. These
watersheds include wetlands and non-wetland bodies of water that meet specific criteria.
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San Ramon Canyon has a clear connection to the ocean and would come under the jurisdiction of
the ACOE.
Photo 16: Jurisdictional drainage
The lateral limit of Corps jurisdiction extends to the Ordinary High Water Mark (OHWM) and to
any wetland areas extending beyond the OHWM; thus, the maximum jurisdictional area is
represented by the OHWM or wetland limit, whichever is greater.
USACE issues two types of 404 permits: Standard and General permits. There are two types of
General permits, Regional permits and Nationwide permits. Regional permits are issued for a
general category of activities when they are similar in nature and cause minimal environmental
0.81 acres of jurisdictional
drainage. No wetlands
habitat.
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effect. Nationwide permits are issued to authorize a variety of minor project activities with no
more than minimal effects.
There are two types of Standard permits: Individual permits and Letters of Permission.
Ordinarily, projects that do not meet the criteria for a Nationwide Permit may be permitted under
one of USACE’s Standard permits. For Standard permits, the USACE decision to approve is
based on compliance with U.S. EPA’s Section 404 (b)(1) Guidelines (U.S. EPA CFR 40 Part
230), and whether permit approval is in the public interest. The Section 404(b)(1) Guidelines
were developed by the U.S. EPA in conjunction with USACE, and allow the discharge of
dredged or fill material into the aquatic system (waters of the U.S.) only if there is no practicable
alternative which would have less adverse effects. The Guidelines state that USACE may not
issue a permit if there is a least environmentally damaging practicable alternative (LEDPA), to
the proposed discharge that would have lesser effects on waters of the U.S., and not have any
other significant adverse environmental consequences. Per Guidelines, documentation is needed
that a sequence of avoidance, minimization, and compensation measures has been followed, in
that order. The Guidelines also restrict permitting activities that violate water quality or toxic
effluent standards, jeopardize the continued existence of listed species, violate marine sanctuary
protections, or cause “significant degradation” to waters of the U.S. In addition every permit
from the USACE, even if not subject to the Section 404(b)(1) Guidelines, must meet general
requirements. See 33 CFR 320.4.
ACOE Summary: Based on review of the regulations, the historic connection the canyon
drainage has with the ocean, the extent of earthwork proposed to remedy erosion, flash
flood episodes and construction of the storm drain structure, the project will likely require
an ACOE 404 permit.
State Water Resources Control Board
California’s Porter-Cologne Act, enacted in 1969, provides the legal basis for water quality
regulation within California. This Act requires a “Report of Waste Discharge” for any discharge
of waste (liquid, solid, or gaseous) to land or surface waters that may impair beneficial uses for
surface and/or groundwater of the State. It predates the CWA and regulates discharges to waters
of the State. Waters of the State include more than just Waters of the U.S., like groundwater and
surface waters not considered Waters of the U.S. Additionally, it prohibits discharges of “waste”
as defined and this definition is broader than the CWA definition of “pollutant”. Discharges
under the Porter-Cologne Act are permitted by Waste Discharge Requirements (WDRs) and may
be required even when the discharge is already permitted or exempt under the CWA.
SWRCB Summary: San Ramon Canyon is a state water as defined by the State Water
Resources Control Board (SWRCB). The Corps has delegated the authority for use of
404 permits to each individual state. The SWRCB is the state agency that allows the use
of a 404 permit in the state, with the authority in the state being vested in regional offices.
The use of a 404 permit in Rancho Palos Verdes is regulated by the Los Angeles
Regional Water Quality Control Board (LARWQCB) under Section 401 of the Clean
Water Act regulations. In addition, the Board has the responsibility to require that
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projects address ground water and water quality issues, which would be evaluated as part
of the geotechnical and hydrology studies. Their authority extends to all waters of the
State (of California). Under the Porter-Cologne Act of 2003, the RWQCB has extended
its responsibilities to include impacts to water quality from non-point source pollution.
California Department of Fish and Game
California has enacted a similar law at the state level, the California Endangered Species Act
(CESA), California Fish and Game Code, Section 2050, et seq. CESA emphasizes early
consultation to avoid potential impacts to rare, endangered, and threatened species and to
develop appropriate planning to offset project caused losses of listed species populations and
their essential habitats. The California Department of Fish and Game (CDFG) is the agency
responsible for implementing CESA. Section 2081 of the Fish and Game Code prohibits “take”
of any species determined to be an endangered species or a threatened species. Take is defined
in Section 86 of the Fish and Game Code as “hunt, pursue, catch, capture, or kill, or attempt to
hunt, pursue, catch, capture, or kill.” CESA allows for take incidental to otherwise lawful
development projects; for these actions an incidental take permit is issued by CDFG. For species
listed under both FESA and CESA requiring a Biological Opinion under Section 7 of the FESA,
CDFG may also authorize impacts to CESA species by issuing a Consistency Determination
under Section 2080.1 of the California Fish and Game Code. CDFG regulates any alteration of
streambeds or lakes through their Code 1600 et seq. program. Any channel area displaying bed
and banks falls within CDFG's jurisdiction. Lateral limits of jurisdiction are not clearly defined,
but generally include any riparian resources associated with a stream or lake.
CDFG Summary: San Ramon Canyon has a bed and definable banks and would come
under the jurisdiction of the CDFG. There are 0.81 acres of jurisdictional streambed, but
no riparian habitat. The project will likely require a CDFG 1602 permit to address
impacts to the maintained drainage channel. It is not clear whether the project proponent
will have to obtain a 401 permit from the RWQCB, because no 404 permit is required.
However, the project will be required to obtain a National Pollutant Discharge and
Elimination System (NPDES) permit from the RWQCB or as part of the Los Angeles
County MS4 permit.
Jurisdictional Summary
Based on the field visit conducted, there was no riparian plant species, hydric soils or hydrology
to support a wetlands habitat. There is no wetland habitat in the canyon. However, the project is
a jurisdictional drainage and will come under the jurisdiction of the three agencies listed above.
The jurisdictional waters of San Ramon Canyon are a total of 0.81 acres (Figure 16). The project
alternatives were reviewed to avoid jurisdictional impacts to the extent feasible. However, due
to the nature of storm drain construction, avoidance of impacts was not possible with any of the
alternatives and still be able to achieve the goals of protecting the downstream community from
flash flood episodes, minimizing erosion of the canyon wall and stabilizing PVDE and the
Tarapaca landslide. Therefore, minimization and compensation measures were reviewed for
each alternative. Based on analysis of project information available, the proposed project has the
least impacts with 0.07 acres of jurisdictional waters. The proposed project is the least impactful
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of the alternatives reviewed. These impacts are proposed to be mitigated at a 3:1 ratio.
Therefore, at least 0.21 acres of the restored streambed will provide the mitigation needed
through the Landscape Mitigation Plan required.
2.1.4 Existing Plant Communities
The area south of W. 25th Street to the top of the bluffs overlooking the ocean is impacted by
foot traffic and recreational biking. A maintenance road and foot path area extends from W. 25th
Street down to the ocean bluffs. East of the path is a mostly non-native plant community
indicative of prior disturbance. West of the path, there is an area that appears to have been re-
vegetated using a mix of local and inland native plant species (such as Encelia farinosa, desert
brittlebush, not normally found on the coast). Based on field observations and NCCP
information, the project area supports three distinct plant communities (Figures 16 and 17).
Grassland
The upland areas around San Ramon Canyon north of W. 25th Street support a Grassland plant
community. The dominant species at the time of the survey were wild oats (Avena fatua) and
slender wild oats (Avena barbata). Other annual species in the plant community include shortpod
mustard (Hirschfeldia incana), ripgut brome (Bromus diandrus) and hare barley (Hordeum
murinum). Shrub species found in sparse abundance include coastal brittlebush (Encelia
californica), California sagebrush (Artemisia californica) and lemonade berry (Rhus
integrifolia). Peruvian pepper tree (Schinus molle) occurs as scattered individual tree.
South of W. 25th Street, the habitat east of the path is a mix of Grassland and bare earth. Ripgut
brome and purple false-brome (Brachypodium distachyon) are common in the Grassland plant
community in this area, along with fountain grass (Pennisetum setaceum) and cliff aster
(Malacothrix saxatilis). West of the path is more Grassland, and to the extreme west, Coastal
Sage Scrub, Buckwheat-dominated. Appendix B in the biological report contains a list of all
plant species observed. There are 63.48 acres of Grassland shown on Figure 15, canyon section,
and 41.65 acres of Grassland shown on Figure 16, lower project section.
Coastal Sage Scrub
San Ramon Canyon supports an open stand of Coastal Sage Scrub, Buckwheat-dominated. Plant
cover was relatively low along the bottom (main flow area) of the canyon, with most of shrub
species concentrated on the canyon’s slopes and where the canyon widens out at the bottom.
Shrubs in addition to ashyleaf buckwheat (Eriogonum cinereum) include California sagebrush
and coastal brittlebush. Found scattered on the canyon bottom near Palos Verdes Drive East is
arroyo willow (Salix lasiolepis), Indian tree tobacco (Nicotiana glauca) and castor bean (Ricinus
communis). There are 15.82 acres of Coastal Sage Scrub, Buckwheat-dominated shown on
Figure 15, and 10.43 acres of CSS shown on Figure 16.
Southern Coastal Bluff Scrub
The coastal bluff supports a stand of Southern Coastal Bluff Scrub. One cactus species observed
is coastal prickly pear (Opuntia littoralis). Shrub species observed in this plant community
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include coastal brittlebush, California sagebrush and white-flowered goldenbush (Isocoma
menziesii).
Figure 16: Plant communities, upper section
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Figure 17: Plant Communities, Lower section.
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2.1.5 Sensitive Plant Resources/Threatened-Endangered Species
The primary federal law protecting threatened and endangered species is the Federal Endangered
Species Act (FESA): 16 USC Section 1531, et seq. See also 50 CFR Part 402. This act and
subsequent amendments provide for the conservation of endangered and threatened species and
the ecosystems upon which they depend. Under Section 7 of this act, federal agencies, such as
the Federal Highway Administration (FHWA), are required to consult with the U.S. Fish and
Wildlife Service (USFWS) and the National Oceanic and Atmospheric Administration’s
National Marine Fisheries Service (NOAA Fisheries Service) to ensure that they are not
undertaking, funding, permitting or authorizing actions likely to jeopardize the continued
existence of listed species or destroy or adversely modify designated critical habitat. Critical
habitat is defined as geographic locations critical to the existence of a threatened or endangered
species. The outcome of consultation under Section 7 is a Biological Opinion or an Incidental
Take statement. Section 3 of FESA defines take as “harass, harm, pursue, hunt, shoot, wound,
kill, trap, capture or collect or any attempt at such conduct.”
This section of the document discusses natural communities of concern. The focus of this
section is on biological communities, not individual plant or animal species. The emphasis of
the section should be on the ecological function of the natural communities within the area. This
section also includes information on wildlife corridors [include fish passage as appropriate] and
habitat fragmentation. Wildlife corridors are areas of habitat used by wildlife for seasonal or
daily migration. Habitat fragmentation involves the potential for dividing sensitive habitat and
thereby lessening its biological value. Include any regulations that pertain to the natural
communities discussed (i.e. Oak Woodland protection, California Fish and Game Code, etc.)
The CNDDB identified nineteen sensitive biological resources recorded on the San Pedro
quadrangle. Of these nineteen resources, seven are either found in similar habitat within three
miles of the project site, or there is suitable habitat present on site. Three of the six resources
were present on site, and one additional species not mapped on the San Pedro topographic
quadrangle was also found on site. Six of the resources found on site are covered species in the
City’s NCCP. Following are detailed discussions on the ten sensitive biological resources
present or potentially present in the vicinity of the project area.
Woolly Seablite
Woolly seablite (Suaeda taxifolia) is an evergreen shrub that occurs on coastal bluffs, in coastal
dunes and along the margins of salt marshes. It blooms throughout the year from January
through December, growing at elevations from sea level to 50 meters. It occurs in coastal areas
from Santa Barbara and the Channel Islands south to Baja California, including the Palos Verdes
Peninsula.
Woolly seablite is impacted mostly by habitat loss and degradation from coastal development
and use. It is listed on List 4.2 of the CNPS Inventory and is a covered species in the City’s
NCCP. It is not listed by the USFWS or the CDFG. Although Woolly seablite was observed on
the bluff face, the species will likely not be affected by the outlet construction due to its location
from the outlet structure.
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Aphanisma
Aphanisma (Aphanisma blitoides) is an annual herb that occurs only in coastal areas, on bluffs
and slopes near the ocean. It prefers sandy or clay soils in coastal bluff scrub, coastal dune and
coastal scrub habitats. It blooms from March through June at elevations from one to 305 meters.
It is on the Channel Islands and on the mainland, including the Palos Verde Peninsula.
Threats to this species are mostly habitat decline from urbanization, residential development and
foot traffic along bluff faces. On a few of the Channel Islands, aphanisma is threatened by feral
herbivores such as goats. Aphanisma is on List 1B.2 of the CNPS inventory. It is not listed by
the USFWS or the CDFG. However, it is a covered species in the City’s NCCP. Although
Aphanisma was found on the bluff face, the species will likely not be affected by the outlet
construction due to its location from the outlet construction.
South Coast Saltscale
South Coast saltscale is an annual herb that occurs along the coast and in suitable playa habitat
away from the coast. It occurs on alkali soils in coastal bluff scrub, coastal dune and coastal
scrub on the coast, and in chenopod scrub in playa habitats. South Coast saltscale flowers from
March through October at elevations from sea level to 140 meters.
Threats to this species include coastal development and recreational use of sand dunes and
playas. South Coast saltscale is on List 1B.2 of the CNPS inventory. It is not listed by the
USFWS or the CDFG. It is a covered species in the City’s NCCP. South coast saltscale was not
observed during the field survey.
Davidson’s Saltscale
Davidson’s saltscale (Atriplex serenana var. davidsonii) is an annual herb that occurs along
bluffs and lower slopes along the coast and in suitable habitats inland from the coast. It is found
in coastal bluff scrub and coastal scrub habitats on alkaline soils. Davidson’s saltscale blooms
from April to October at elevations from 10 to 240 meters.
Threats to this species include recreational use of coastal areas, urbanization of coastal slopes
and channelization and disking of suitable alkaline soil habitats inland. Davidson’s saltscale is on
List 1B.2 of the CNPS inventory. It is not listed by the USFWS or the CDFG. Davidson’s
saltscale was not observed during the field survey.
Catalina Crossosoma
Catalina crossosoma (Crossosoma californicum) is a deciduous shrub that grows on rocky sea
bluffs, in wooded canyons and dry open sunny areas on rocky clay. It is found in coastal scrub
and chaparral habitats, primarily on the Channel Islands. The mainland populations are mostly
limited to the undeveloped areas of the coast, including the Palos Verdes Peninsula. It is present
year round, flowering from February through May at sea level to 500 meters elevation.
The mainland populations are subject to loss from urbanization. Catalina crossosoma is on List
1B.2 of the CNPS inventory. It is not listed by the USFWS or the CDFG, but it is a covered
species in the City’s NCCP. Catalina crossosoma was not observed during the field surveys.
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Santa Catalina Island Desert-thorn
Santa Catalina Island desert-thorn (Lycium brevipes var. hassei) is a deciduous shrub growing on
coastal bluffs and slopes along the coast. It occurs in coastal bluff scrub and coastal bluff scrub
habitats. This species blooms in June at elevations ranging from ten to 300 meters.
The mainland population has very few individuals and is threatened by coastal development in
unprotected areas. One population was found in 1992 at the Abalone Cove Ecological Reserve.
Santa Catalina Island desert-thorn is on List 1B.1 of the CNPS inventory. It is not listed by the
USFWS or the CDFG, but it is a covered species in the City’s NCCP. Catalina Island desert-
thorn was not observed during the field surveys.
Island Green Dudleya
Island green dudleya (Dudleya virens ssp. insularis) is a perennial herb growing on rocky sea
bluffs along the coast and on the Channel Islands (Photo 17). It prefers rocky soil in coastal
scrub and coastal bluff scrub habitats. This species blooms from April through June from five to
300 meters in elevation.
The mainland populations are threatened by coastal development. Island green dudleya is on List
1B.2 of the CNPS inventory. It is not listed by the USFWS or the CDFG. It is a covered species
in the City’s NCCP. Island green dudleya was observed all along the upper bluff face,
apparently growing along a line of substantially rocky soils. Although this species will likely not
be affected by the outlet construction, a preconstruction survey, and species relocation if
necessary, will be conducted as a precautionary measure.
Photo 17: Island green dudleya on bluff near project area.
Small-flowered Morning Glory
Small-flowered morning glory (Convolvulus simulans) is an annual herb that grows on coastal
bluffs and slopes, as well as in inland slopes and flatlands. It is found in chaparral, coastal scrub
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and valley and foothill grassland habitats. This species grows on clay soils and serpentinite seeps
at elevations from 30 to 700 meters. Small-flowered morning glory blooms from March through
July.
This species is threatened by development along the coast and in inland flatland and shallow
slopes areas. It is on List 4.2 of the CNPS Inventory, but is not listed by the CDFG or the
USFWS. Small-flowered morning glory was observed on the bluff face; however, the species
will likely not be affected by the outlet construction due to its location of the from the outlet
construction area.
Coastal Sage Scrub
Coastal sage scrub is a plant community composed of semi-deciduous shrubs such as California
buckwheat, California sagebrush and coastal encelia. This plant community was once common
through the coastal areas inland areas of southern California, but has been lost to development.
It provides habitat for a number of listed and sensitive species, including the California
gnatcatcher. Coastal sage scrub is present along portions of the upper San Ramon Canyon area.
Therefore a California gnatcatcher survey was conducted, consistent with California Dept. of
Fish and Game protocol during nesting season. Findings of the gnatcatcher survey are included
in Section 2.1.6 below.
Southern Coastal Bluff Scrub
Southern coastal bluff scrub is a plant community composed of several scrub species tolerant of
coastal salt spray and winds. It is found along the mainland and the Channel Islands on steep
bluffs. This plant community is in decline because of increasing coastal development and
recreational damage by illegal trail construction and human-created erosion of bluff faces.
Southern coastal bluff scrub is present along the entire bluff face. Although it is covered by the
City’s NCCP, a preconstruction survey and species relocation will be conducted as a
precautionary measure.
Wild and Scenic Rivers
Based on review of the US Dept. of the Interior and US Fish and Wildlife Service web site
resource (www.doi.gov), review of the CDNNB for this area, review of the City’s NCCP, the
site visit and reconnaissance survey the project is neither within, nor adjacent to a Wild and
Scenic River System.
Protected Farmlands/Agriculture & Forestry Resources
The National Environmental Policy Act (NEPA) and the Farmland Protection Policy Act (FPPA,
7 USC 4201-4209; and its regulations, 7 CFR Part 658) require federal agencies, such as FHWA,
to coordinate with the Natural Resources Conservation Service (NRCS) if their activities may
irreversibly convert farmland (directly or indirectly) to nonagricultural use. For purposes of the
FPPA, farmland includes prime farmland, unique farmland, and land of statewide or local
importance.
The California Environmental Quality Act (CEQA) requires the review of projects that would
convert Williamson Act contract land to non-agricultural uses. The main purposes of the
Williamson Act are to preserve agricultural land and to encourage open space preservation and
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efficient urban growth. The Williamson Act provides incentives to landowners through reduced
property taxes to deter the early conversion of agricultural and open space lands to other uses.
Based on review of the City’s General Plan, and the Farmland Protection Policy Act (FPPA), as
implemented by the Secretary of Agriculture, the project area is not located within a protected
farmland and is not covered by the Williamson Act.
In determining whether impacts to agricultural resources are significant environmental effects,
lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment
(LESA) Model (1997) prepared by the California Dept. of Conservation as an optional model to
use in assessing impacts on agriculture and farmland. In determining whether impacts to forest
resources, including timberland, are significant environmental effects, lead agencies may refer to
information compiled by the California Department of Forestry and Fire Protection regarding the
state’s inventory of forest land, including the Forest and Range Assessment Project and the
Forest Legacy Assessment project; and forest carbon measurement methodology provided in
Forest Protocols adopted by the California Air Resources Board.
The LESA model is composed of 6 different factors. Two land evaluation factors are based on
measures of soil resource quality (composing 50% of score), and four site assessment factors
provide measure to a given project’s size, water resource availability, surrounding agricultural
lands, and surrounding protected resource lands (composing the other 50% of score). The LESA
system is a point-based approach with separate ratings on a 100-point scale. When complete, the
final score is measured by the LESA thresholds of significance. More detailed information on
LESA can be found at: http://www.consrv.ca.gov/dlrp/LESA/lesamodl.pdf.
Based on review of the above mentioned resources, the proposed project is not located within,
nor will impact designated agriculture and forestry resources. Based on review of historic aerial
photos, the project area has never been utilized for any agricultural use for active forestry.
Invasive Species
On February 3, 1999, President Clinton signed Executive Order 13112 requiring federal agencies
to combat the introduction or spread of invasive species in the United States (U.S.). The order
defines invasive species as “any species, including its seeds, eggs, spores, or other biological
material capable of propagating that species, that is not native to that ecosystem whose
introduction does or is likely to cause economic or environmental harm or harm to human
health." Federal Highway Administration guidance issued August 10, 1999 directs the use of the
State’s invasive species list currently maintained by the California Invasive Species Council to
define the invasive species that must be considered as part of the NEPA analysis for a proposed
project.
No invasive species will be utilized with landscape mitigation program. Annual maintenance of
the Landscape Establishment Conformance Mitigation Plan will monitor invasive species and
recommend removal if necessary.
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2.1.6 Sensitive Wildlife Species/Threatened-Endangered Species
NRA, Inc. reviewed the available literature and used site photographs to determine what
sensitive animal species may use the bluff. The scrub habitat on the bluff and the upland habitat
in the drainage may provide habitat for some of these species, such as the house finch, mourning
dove and northern mockingbird. The area to be disturbed in the maintained drainage channel
does not provide suitable habitat for sensitive wildlife species because of its previously disturbed
condition and periodic maintenance and cleaning.
Most of the wildlife observed on site were bird species. The most commonly observed were
California towhee (Pipilo crissalis), western scrub jay (Aphelocoma californica), mourning dove
(Zenaida macroura), Ana’s hummingbird (Calypte anna) and house sparrow (Passer
domesticus). Less commonly observed were wrentit (Chamaea fasciata), Bewick’s wren
(Thryomanes bewickii), and common raven (Corvus corax). The only reptile species observed
was the western fence lizard (Sceloporus occidentalis). The only mammal species for which sign
was observed was the striped skunk (Mephitis mephitis). Appendix B of the biological report
contains a list of all wildlife species observed.
California Gnatcatcher
The California gnatcatcher (Polioptila californica californica) is a small songbird that is a year
round resident of sage scrub communities. Sage scrub communities preferred by this species are
typically dominated by low-growing, drought deciduous and succulent shrubs, as well as sub-
shrub species including California sage (Artemisia californica), California buckwheat
(Eriogonum fasciculatum), brittlebush (Encelia farinosa), sage species (Salvia spp.), and cacti
(Opuntia spp.).
California gnatcatchers begin nesting in mid to late February. Re-nesting attempts may be made
into August. Territory size ranges from 2 to 40 acres. They have a repetitive, kitten-like mewing
call and appear to be most vocal in the early morning and evening. Detection is exceedingly
difficult if the birds are not vocalizing.
The original range for this species included all of the coastal sage scrub communities of southern
California, from Ventura County south to San Diego and on into Mexico. This species also
occurred in extensive coastal sage scrub habitat in Riverside County. Fragmentation or removal
of sage scrub plant communities has reduced the known populations to scattered localities in Los
Angeles, Orange, Riverside and San Diego counties. Even these populations are generally found
only in the larger open space areas in and around development.
On March 25, 1993, the California gnatcatcher was listed by the Service as a threatened species
pursuant to the Federal Endangered Species Act (ESA), and is a Species of Special Concern by
the CDFG. Suitable habitat for the California gnatcatcher may exist within the vicinity of the
project area. Therefore a California gnatcatcher survey was conducted by a Senior Avian
Ecologist qualified by the CDFG to conduct gnatcatcher surveys.
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Survey Results: Six surveys were completed at least one week apart within the breeding
season (March 15 – June 30). The surveys occurred between 0700 and 1025 hours each
day, within all portions of the project site containing potentially suitable coastal sage
scrub habitat. A total of approximately 16.26 acres were surveyed. No coastal California
gnatcatchers were observed during any of the six surveys and the site is considered
unoccupied. The CNDDB and City NCCP records coastal California gnatcatcher
occurrence in the general vicinity of the project as of 2006. However, this occurrence is
likely associated with intact, higher quality coastal sage scrub south and west of the site.
Based on the negative findings of surveys and marginal quality of habitat onsite, no
further actions with regard to coastal California gnatcatcher are recommended.
Cactus Wren
The coastal cactus wren (Campylorhynchus brunneicapillus couesi) is a subspecies of the cactus
wren, which occurs throughout the Southwest and California. The coastal cactus wren is
confined to coastal areas, breeding in coastal sage scrub that is dominated by extensive stands of
prickly pear or cholla cactus (Opuntia spp.). The range of the coastal cactus wren once extended
from Ventura to the border with Baja California. However, coastal development and loss of
suitable habitat had reduced the population to less than 3,000 pairs as of 1990 (Rea and Weaver,
1990). These populations were divided up into colonies of varying size. According to Atwood
(1990) the populations on the Palos Verdes Peninsula were relatively stable during the mid-
1990s.
This species is threatened by development along the coast and in inland. It is listed as a Bird of
Conservation Concern by the USFWS, and as a Species of Special Concern by the CDFG. There
is no cactus-dominant habitat suitable for the coastal cactus wren within the immediate vicinity
of the project area. The NCCP has records of nesting populations east of the canyon in the
cactus-dominated scrub on the plateau above San Ramon Canyon.
Summary: Based on personal communication with the biologist conducting the
gnatcatcher survey, no cactus wrens were observed during the survey.
Palos Verdes Blue Butterfly
The City’s NCCP identified an historic Palos Verdes Blue Butterfly (PVBB) sighting west of the
project area. Based on information from the biological report, no appropriate PVBB habitat was
identified in the project area and no PVBB were observed. In addition, no PVBB were identified
during the gnatcatcher survey. Therefore, no specific PVBB survey was conducted for this
project.
Raptors, Migratory Birds and Habitat
Most of the raptor species (eagles, hawks, falcons and owls) are experiencing population
declines as a result of habitat loss. As a group, raptors are of concern to state and federal
agencies. Some, such as the peregrine falcon, have also experienced population losses as a result
of environmental toxins affecting reproductive success, animals destroyed as pests or collected
for falconry, and other direct impacts on individuals. Only a few species, such as the red-tailed
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hawk and barn owl, have expanded their range in spite of or a result of human modifications to
the environment. As a group, raptors are of concern to state and federal agencies.
Raptors and all migratory bird species, whether listed or not, also receive protection under the
Migratory Bird Treaty Act (MBTA) of 1918. The MBTA prohibits individuals to kill, take,
possess or sell any migratory bird, bird parts (including nests and eggs) except in accordance
with regulations prescribed by the Secretary of the Interior Department (16 U. S. Code 703).
Additional protection is provided to all bald and golden eagles under the Bald and Golden Eagle
Protection Act of 1940, as amended. State protection is extended to all birds of prey by the
CDFG Code, Section 2503.5. No take is allowed under these provisions except through the
approval of the agencies or their designated representatives.
Based on the biological assessment, no suitable raptor nesting habitat occurs in the project area.
The level of human activity along the project alignment has already impacted any nesting
activity, and this impact is ongoing. The excavation, tunneling and various construction
activities is not expected to significantly impact nesting migratory or raptor species. The project
area may provide foraging habitat for raptors. The available habitat is mostly covered by dense
weeds and grasses, but may be somewhat suitable for raptor species that hunt from the air. There
is no substantial woodland perching habitat for arboreal raptor species. No significant loss to
raptors and migratory birds or their habitats are expected, and therefore no mitigation is required.
Essential Fish Habitat
As indicated in the coastal resources of Regulations 2.1.2, the off shore habitat is important for
fish species in this area. Access to the outlet structure will require movement of equipment
along the shore during low tides from Royal Palms State Beach in the City of San Pedro, located
approximately 1 mile south of the project. No grading will be required for construction
equipment to travel along the shore. The project will not extend into the coastal waters, and no
impacts to fish or wildlife are expected to occur with the implementation of Best Management
Practices by the contractor during construction.
Black Abalone: The final black abalone critical habitat area has been published for a 3-
mile expanse from the Torrance/Palos Verdes Estates border to Los Angeles Harbor.
Mitigation will be incorporated to avoid any and all black abalone impacts along the
construction access route or outlet structure area. A preconstruction survey, and species
relocation if necessary, will be conducted.
Montrose Settlement Restoration Program: The Phase 2 Restoration Plan of the
Montrose Settlements Restoration Program (MSRP) identifies three potential restoration
sites in the ocean near the PV shelf near the vicinity of the project site. Part of the goal of
the restoration plan is to build artificial reef modules for restoration of natural resources,
including marine birds, fish and the habitats upon which they depend. The closest
restoration site identified by MSRP Staff would be located approximately 1 mile off the
coast where the storm drain outlet is proposed. Although the storm drain system could
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carry sediment during storm events that would directly outlet to the ocean, it is not
anticipated that sediment could be carried out 1 mile to the potential restoration site.
Habitat Fragmentation and Wildlife Movement
Wildlife movement and the fragmentation of wildlife habitat are recognized as important wildlife
issues that must be considered in assessing impacts to wildlife. In summary, habitat
fragmentation is the division or breaking up of larger habitat areas into smaller areas that may or
may not be capable of independently sustaining wildlife and plant populations. Wildlife
movement (more properly recognized as species movement) is the temporal movement of
species along various types of corridors. Wildlife corridors are especially important for
connecting fragmented wildlife habitat areas.
Habitat fragmentation has already occurred with the development of this area of the Palos Verdes
peninsula and Friendship Regional Park immediately east of the project will not be impacted.
The project will not add to the fragmentation of habitat. There are no substantial wildlife
corridors on site. The project will not impede or significantly impact wildlife movement in this
area. No significant impacts to habitat fragmentation and wildlife movement are expected to
occur, and therefore no mitigation is required.
2.1.7 Biological Avoidance, Minimization and/or Mitigation Measures
The proposed project will have impacts to general biological resources, resulting in a minor loss
of upland habitat (grassland, bare slope, and CSS). Table 3 below provides a breakdown of
impacted areas.
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TABLE 3
Project Summary Table of Habitat Impact Areas
Location Lineal
Feet
Cut
CY
Fill
CY
Habitat Impact area
Canyon Inlet Structure 200ft. 660cy 1,250 cy 0.04 acres jurisdictional
drainage.
Canyon Tunnel 1,900 ft. 3,000 cy - 0
Buttress Fill and
Terrace drains
900 ft. n/a 50,110 cy 0.37 acres Bare Slope.
1.36 acres Grassland.
0.03 acres jurisdictional
drainage.
0.34 acres of CSS.
Access/maintenance
road
350 ft. 2,400 cy 500 cy Grassland impacts included
in total above.
CSS impacts included in
total above.
Lower trench for cut
and cover section of
buried pipe
1,900 ft 7,090 cy - Grassland impacts included
in total above.
Lower Tunnel 300 ft Incl. in
canyon
tunnel
quantity.
- 0
Outlet structure 50 ft 660cy 285 cy 0.02 acres Southern coastal
bluff scrub.
Construction of the inlet structure and canyon stabilization will impact approximately 0.07 acres
of jurisdictional drainage. As identified in the biological report, this jurisdictional drainage is
not considered wetlands habitat. The filling of this jurisdictional drainage within the San Ramon
Canyon will require appropriate mitigation as part of an ACOE 404 permit and RWQCB 401
permit. Post-construction re-vegetation of the new elevated streambed and affected canyon
slopes with native vegetation will be required at a 3:1 ratio (0.21 acres total) through a
Landscape Establishment Conformance Plan and described in further detail below. Re-
vegetation activity will include a plant palette, consistent with the Resource Agency and Native
Plant Society criteria, that lists exact species of plants to be restored and the native plants derived
from local genetic sources be used. The re-vegetation program will be consistent with the City
NCCP restoration guidelines set forth in Section 7.0 of the NCCP.
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Landscape Establishment Conformance Mitigation Plan would include the following:
o All related coordination and specification preparation required to enforce this
establishment / mitigation plan as conditioned by the MND/FONSI and outside regulatory
agencies shall be consistent with the City NCCP.
o The plan will include a description of the enhancement and restoration activities,
timelines, plant palettes, maintenance and monitoring.
The monitoring would include:
Detailing physical work to be performed by others to prevent the re-invasion of non-
native plants.
Prepare annual report after the initial mitigation implemented, photo documentation from
designated “photo stations.”
Documentation of re-vegetation survival percentages/sizes/species.
Direct/document the number and species of replacement plants (shrubs & trees).
Documentation of the methods used to assess all parameters.
Survival goals include: minimum of 80% on year one and 100% thereafter and/or 75%
coverage with native woody species after 3-years and 90% after 5-years. Non-native
species shall comprise less that 5% of the cover after 5-years. Monitoring and
replacement plants will required for the 5-year period mentioned, with the option of
stopping the plan 2-years prior IF all success criteria is met.
We recommend the following be included as part of the application process:
A qualified biologist/plant restoration specialist to retrieve and replant any of the
sensitive plant species that may be impacted prior to construction on the bluff.
All spills, leaks or other losses of oils and other hazardous or toxic materials will
be immediately cleaned up. Under no circumstances is any hazardous or toxic
material to be allowed in or near the maintained drainage channel.
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2.2 Cultural Resources
Mr. Rob Wlodarski, Registered Archaeologist and Principal Investigator, performed a cultural
resources survey consistent with Section 4(f) of the US Dept. of Transportation Act and Section
106 of the National Historic Preservation Act of 1966, to locate any recorded cultural resources.
The methods employed for the cultural resources survey included:
A review of previously filed site records and reports at the California Historical
Resources Information System (CHRIS) inventory center for prehistoric sites and
historic landmarks in the project area from the South Central Coastal Information
Center (SCCIC).
A comprehensive field survey reconnaissance of the San Ramon Canyon project
area and construction access locations.
A review of the regional literature for previously published archaeological sites and
historical landmarks associated with the region.
A review of aerial photos of the San Ramon Canyon drainage area.
2.2.1 Regulatory Setting
“Cultural resources” as used in this document refers to all “built environment” resources
(structures, bridges, railroads, water conveyance systems, etc.), culturally important resources,
and archaeological resources (both prehistoric and historic), regardless of significance. Laws
and regulations dealing with cultural resources include:
The National Historic Preservation Act of 1966, as amended, (NHPA) sets forth national policy
and procedures regarding historic properties, defined as districts, sites, buildings, structures, and
objects included in or eligible for the National Register of Historic Places. Section 106 of NHPA
requires federal agencies to take into account the effects of their undertakings on such properties
and to allow the Advisory Council on Historic Preservation the opportunity to comment on those
undertakings, following regulations issued by the Advisory Council on Historic Preservation (36
CFR 800). On January 1, 2004, a Section 106 Programmatic Agreement (PA) between the
Advisory Council, the Federal Highway Administration (FHWA), State Historic Preservation
Officer (SHPO), and the Department went into effect for Department projects, both state and
local, with FHWA involvement. The PA implements the Advisory Council’s regulations, 36
CFR 800, streamlining the Section 106 process and delegating certain responsibilities to the
Department. The FHWA’s responsibilities under the PA have been assigned to the Department
as part of the Surface Transportation Project Delivery Pilot Program (23 CFR 327) (July 1,
2007).
The Archaeological Resources Protection Act (ARPA) applies when a project may involve
archaeological resources located on federal or tribal land. ARPA requires that a permit be
obtained before excavation of an archaeological resource on such land can take place. Historic
properties may also be covered under Section 4(f) of the U.S. Department of Transportation Act,
which regulates the “use” of land from historic properties.
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Historical resources are considered under the California Environmental Quality Act (CEQA), as
well as California Public Resources Code (PRC) Section 5024.1, which established the
California Register of Historical Resources. PRC Section 5024 requires state agencies to
identify and protect state-owned resources that meet National Register of Historic Places listing
criteria. It further specifically requires the Department to inventory state-owned structures in its
rights-of-way. Include the following sentence as applicable. Sections 5024(f) and 5024.5
require state agencies to provide notice to and consult with the State Historic Preservation
Officer (SHPO) before altering, transferring, relocating, or demolishing state-owned historical
resources that are listed on or are eligible for inclusion in the National Register or are registered
or eligible for registration as California Historical Landmarks.
2.2.2 Regional Archaeological Studies
An overview of the regional archaeological and historical literature provided the background
information contained in the cultural resources survey. It summarizes current archaeological
knowledge and the cultural traditions represented in the region, as well as unresolved problems
of information and interpretation that give significance to the heritage resources that might be
encountered. No reference was found to any published archaeological sites or historical
landmarks in and adjacent to the project area.
2.2.3 Record Search
A records search was performed at the South Central Coastal Information Center August 25,
2010 and updated by a professional archaeologist on August 4, 2011 to review recorded
prehistoric or historic archaeological sites or isolates or historic properties exist within the
boundaries of the project area. Nine previously recorded prehistoric archaeological resources
were noted within a ½ mile radius of the project. One site is located within the project site. No
sites are listed on the Archaeological Determination of Eligibility (DOE) list. No isolates are
located within the project site.
No National Register of Historic Places are identified (1979-2005 and supplements to date). No
California Register of Historic Resources exists (1992, with supplemental information to date).
No California Historical Landmarks are listed (1995, with supplemental information to date).
No California Points of Historical Interest are noted (1992, with supplemental information to
date). No State Historic Resources Commission issues are presented (1980-present. Minutes
from quarterly meeting). The California Historic Resources Inventory (HRI) lists no properties
within the search radius.
2.2.4 Cultural Resource Survey/ Field Reconnaissance
A pedestrian survey was performed on July 30, 2011 by RPA certified archaeologist Robert
Wolodarski and Wayne Bonner. No visible signs of prehistoric or historic archaeological
resources were observed during the survey. All exposed surface terrain and fortuitous exposures
such as rodent burrows, drainage cuts, and graded, cleared, or landscaped areas were thoroughly
inspected for signs of cultural resources. No resources were found.
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Any proposed improvements or modifications within the project area will have no direct, adverse
impact on known cultural resources. Since the nature of an on-foot surface reconnaissance can
only confidently assess the potential for encountering surface cultural resource remains;
therefore, customary caution is advised in developing within the project area. Should
unanticipated cultural resource remains be encountered during land modification activities, work
must cease and be relocated, and the lead agency contacted immediately to determine appropriate
measures to mitigate adverse impacts to the discovered resources. Cultural resource remains may
include artifacts, shell, bone, features, altered soils, foundations, trash pits and privies, etc. If
human remains are encountered during excavations associated with this project, all work must
halt, and the County Coroner must be notified (Section 7050.5 of the California Health and
Safety Code). The coroner will determine whether the remains are of forensic interest. If the
coroner, with the aid of the supervising archaeologist, determines that the remains are
prehistoric, the coroner will contact the Native American Heritage Commission (NAHC). The
NAHC will be responsible for designating the most likely descendant (MLD), who will be
responsible for the ultimate disposition of the remains, as required by Section 5097.98 of the
Public Resources Code. The MLD should make his/her recommendations within 48 hours of
their notification by the NAHC. This recommendation may include A) the nondestructive
removal and analysis of human remains and items associated with Native American human
remains; (B) preservation of Native American human remains and associated items in place; (C)
relinquishment of Native American human remains and associated items to the descendants for
treatment; or (D) other culturally appropriate treatment.
2.2.5 Native American Consultation
Attached to this document is evidence that interested parties associated with the Native
American Heritage Commission (NAHC) have been consulted. Based on the letter received
from Mr. Dave Singleton with the NAHC and dated August 10, 2010, a record search of the
sacred land file has failed to indicate the presence of Native American cultural resources in the
immediate area. SFC was provided a list of Native Americans for consultation for Los Angeles
County. This list was compared with the City distribution list for local tribes and Native
American interests. Project information was directed to each tribe and/or individual listed. Nine
(9) Native American tribes were sent separate correspondences via certified mail and each has
been attached to this report. Those tribes with email addresses were also sent the same
information electronically. Two responses were received. One from John Tommy Rosas with
the Tongva Ancestral Territorial Tribal Nation, and one from Andy Sala from the Gabrielino
Band of Mission Indians. Both recommended monitoring during excavation.
2.2.6 State Historic Preservation Officer
Consistent with Section 106 of the National Historic Preservation Act, SFC completed and
submitted a complete package to the State Historic Preservation Office (SHPO) on September
23, 2011. Approval is pending.
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2.2.7 Paleontological Resources
Paleontology is the study of life in past geologic time based on fossil plants and animals. A
number of federal statutes specifically address paleontological resources, their treatment, and
funding for mitigation as a part of federally authorized or funded projects. (e.g., Antiquities Act
of 1906 [16 USC 431-433], Federal-Aid Highway Act of 1960 [23 USC 305]), and the Omnibus
Public Land Management Act of 2009 [16 USC 470aaa]). Under California law, paleontological
resources are protected by the California Environmental Quality Act. The cultural resource
assessment did not indicate paleontological resources in the project area.
2.2.8 Cultural Resource Avoidance, Minimization and/or Mitigation Measures
Based on the findings and conclusions noted in the cultural resource report, the project will have
no direct, adverse impact on known cultural resources. However, the standard mitigation has
been incorporated here should unanticipated cultural resource remains be encountered during
earth work activities. Impacts are still less than significant.
Should unanticipated cultural resource remains be encountered during land modification
activities, work must cease and be relocated, and the lead agency contacted immediately to
determine appropriate measures to mitigate adverse impacts to the discovered resources. Cultural
resource remains may include artifacts, shell, bone, features, altered soils, foundations, trash pits
and privies, etc. If human remains are encountered during excavations associated with this
project, all work must halt, and the County Coroner must be notified (Section 7050.5 of the
California Health and Safety Code). The coroner will determine whether the remains are of
forensic interest. If the coroner, with the aid of the supervising archaeologist, determines that the
remains are prehistoric, the coroner will contact the Native American Heritage Commission
(NAHC). The NAHC will be responsible for designating the most likely descendant (MLD), who
will be responsible for the ultimate disposition of the remains, as required by Section 5097.98 of
the Public Resources Code. The MLD should make his/her recommendations within 48 hours of
their notification by the NAHC. This recommendation may include A) the nondestructive
removal and analysis of human remains and items associated with Native American human
remains; (B) preservation of Native American human remains and associated items in place; (C)
relinquishment of Native American human remains and associated items to the descendants for
treatment; or (D) other culturally appropriate treatment.
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2.3 Geology - Soils - Seismicity
GMU Geotechnical Inc. performed a geotechnical investigation to evaluate the subsurface soil and
bedrock conditions long the drainage system’s alignment in order to provide geotechnical
recommendations for design and construction.
2.3.1 Regulatory Setting
For geologic and topographic features, the key federal law is the Historic Sites Act of 1935, which
establishes a national registry of natural landmarks and protects “outstanding examples of major
geological features”. Topographic and geologic features are also protected under the California
Environmental Quality Act.
This section also discusses geology, soils, and seismic concerns as they relate to public safety and
project design. Earthquakes are prime considerations in the design and retrofit of structures. The
Department’s Office of Earthquake Engineering is responsible for assessing the seismic hazard for
Department projects. The current policy is to use the anticipated Maximum Credible Earthquake
(MCE), from young faults in and near California. The MCE is defined as the largest earthquake
that can be expected to occur on a fault over a particular period of time.
2.3.2 Geologic Setting
The Palos Verdes Peninsula is primarily underlain by Tertiary sedimentary units over basement
rock of the Catalina Schist. Large-scale anticline folding and faulting have been uplifted over time
and generally trending northwest-southeast. Tectonic uplift in the area may be primarily due to
movement on the Cabrillo and Palos Verdes fault zones. Quaternary sediments overlie the
Tertiary materials in much of the lower portions of the peninsula due to deposition of sediments
by wave action during uplift and through sediment deposition due to gravity, erosion or in-site
weathering.
The two most significant landslide features in the Palos Verdes area are the Portuguese Bend
landslide, located approximately 2 miles west of the project, and the South Shores landslide,
located partially within the project area.
The South Sores landslide is considered to be approximately 16,200 years old, and failed as a
clock glide type failure. Some geologist include the currently active Tarapaca landslide as part of
the South Sores landslide, while others map the active landslide as originating upslope of the
limits of the dormant landslide mass. Bedding inclinations to the north of the site are generally
oriented towards the south. Bedding inclinations to the east of the site are generally oriented to
the west. And inclinations to the west of the site are generally oriented to the east. This synclinal
geologic structure likely contributed to and controlled the lateral extent of the failure of the South
Shores landslide, which dominate the project site.
The Tarapaca landslide appears to have failed on a continuous, planar bedding plane surface
within the Altamira Shale bedrock east of the South Shores landslide. The most likely scenario
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for the failure of the Tarapaca landslide is an over-steepening of the canyon walls, resulting in a
“daylighted” adverse bedding condition.
2.3.3 Surface Conditions
Topsoil
Topsoil was observed during the geotechnical field investigation. Where observed, the topsoil
consisted of dark drown silty clay, dry to damp, with no soil structure.
Resent Alluvium
These materials are generally located within San Ramon Canyon, on the canyon floor and in a
relatively thick deposit on the northern side of the intersection of the canyon and W. 25th Street.
Where encountered, the recent alluvium generally consisted of dark drown clay with fine to
medium grained sand. Generally moist and very soft, to soft with scattered to abundant bedrock
fragments and organic materials, the thickest deposit of these recent alluvial materials was found
to be about 31 feet thick.
Artificial Fill
These materials are generally located underlying and adjacent to the paved roadways. PVDE and
W. 25th Street, and as such were likely placed during grading of the roads pre-1950s. Where
observed, fill materials were dark drown, dry to damp, soft to firm silty clay and sandy silt with
fragments of bedrock. The maximum thickness of these fill soils was observe to be about 18 feet.
Older Alluvium
Deposits of older alluvium were located in the upper portions of San Ramon Canyon. Where
observed by the geologist within the canyon bottom and sidewalls, these materials consisted of
dark brown clayey silts with scattered to abundant bedrock fragments and rare charcoal
fragments. These soils were moderately well-developed, with blocky to columnar structure and
local porosity. The maximum thickness is estimated to be less than 50 feet.
Resent Landslide Debris
Recently failed materials derived from bedrock and ancient landslide debris were observed
during the field exploration on the east wall of San Ramon Canyon. These materials are referred
to in geologic publications as the Tarapaca landslide. This landslide is considered to be actively
moving. The materials of the Tarapaca landslide consist of loose bedrock fragments up to
cobble-sized with a soil matrix. Pockets of topsoil with organic debris were observed within the
landslide mass.
Ancient Landslide Debris
These materials, known as the South Shores landslide, underlie the majority of the project site
and were encountered within all of the geotechnical boring logs. These materials consisted of
remnant blocks of bedrock up to 10 feet think within a silty clay matrix. These materials are
varicolored, soft to hard, dry to moist, and contain clocks of siliceous siltstone that can be very
hard.
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Altamira Shale Member, Monterey Formation
Bedrock of the Altamira Shale member of the Monterey Formation underlies the project site at
depth, and is exposed within portion of San Ramon Canyon. The Altamira Shale member
consisted of interbedded siltstone and siliceous siltstone with tuffaceous siltstone, bentonitic tuff,
and bentonite. These beds are generally thinly to thickly bedded, planar, with some local soft
sediment deformation. The materials are generally gray to olive drown, damp to moist, firm to
very hard, with scattered fracturing and jointing.
2.3.4 Groundwater
Groundwater was not observed during the geologic investigation. However, groundwater
encountered at 103 feet appeared to be seepage or a perched zone. No surface water was
encountered during the investigation; however, it is likely water flows in this canyon during the
winter months.
2.3.5 Faulting and Seismicity
The project site is located in the highly seismic Southern California region within the influence
of several fault systems that are considered to be active or potentially active. An active fault is
defined by the State of California as a “sufficiently active and well defined fault that has
exhibited surface displacement within Holocene time (the last 11,000 years)”. A potentially
active fault is defined by the State as a “fault with a history of movement within Pleistocene time
(between 11,000 and 1.6 million years ago).”
The site is not within an Alquist-Priolo Earthquake Fault Zone and no known active faults are
shown on current geologic maps as crossing the site. The nearest known active fault is the Palos
Verdes fault, which is located approximately 5.0 kilometers from the site and is capable of
generating a maximum earthquake magnitude of 7.3. The site is also located within 15.6
kilometers of the Newport-Inglewood fault, which is capable of generating a maximum
earthquake magnitude of 7.1. Given the proximity of the site to these and numerous other active
and potentially active faults, the site will likely be subject to earthquake ground motions in the
future.
2.3.6 Geologic Hazards
The City of Rancho Palos Verdes has developed a Local Coastal Plan (LCP) per the
requirements of the Coastal Zone Management Act (CZMA) of 1972 and the California Coastal
Commission requirements. In the coastal areas of the City, the LCP defines areas of extreme
Geologic and slope hazards associated with the bluff and bluff face.
The storm water pipeline lies within several Coastal Resource Management (CRM) Districts
with designations of CRM-1 Extreme Slope, CRM-2 High Slope and CRM-3 Hazards. These
designations are areas for consideration of public health and safety and generally pertain to
restrictions to the development in these areas. Any development within CRM-2 is required to
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perform independent engineering studies conceding the geotechnical, soils and other stability
factors, including seismic considerations.
Slope Stability
Tarapaca Landslide
To evaluate how much fill is required in the canyon bottom to act as a gravity buttress, result of
the analyses indicate that approximately 10 to 30 feet of fill will be required to obtain a safety
factor of approximately 1.23. Approximately 20 to 30 feet of fill placed in the canyon at the toe
of the landslide would be required to obtain a safety factor of approximately 1.5.
The coastal bluff at the existing outlet structure is in a state of constant erosion and is subject to
slope failures due to toppling blocks loosened from the cliff face and rock falls due to over
steepened slopes along the coast line. Furthermore, the coastal bluff is located within a Seismic
Hazard Zone for Earthquake-Induced Landsliding (CDMG, 1999). However, since the tunnel
crown at the outlet structure will be a depth of more than 100 feet below the top of the bluff, the
tunnel runs perpendicular to the bluff, and the tunnel opening will be small relative to the
geometry of the bluff, the proposed tunnel construction will not adversely affect the stability of
the slope. Furthermore, engineering controls will be proposed that will mitigate the introduction
of water up-gradient of the slope.
Lower Switchback PVDE
Existing slope stability safety factors for PVDE were estimated at approximately 1.4. The
analysis indicates that the existing slope face would have to be eroded back approximately 35
feet before the roadway would be in a state of imminent failure. At the current rate of 5 feet of
erosion per year, PVDE may fail in the next 7 years.
Upper Switchback PVDE
Existing slope stability safety factors for PVDE were estimated at approximately 1.3. The
analysis indicates that the existing slope face would have to be eroded back approximately 40
feet before the roadway would be in a state of imminent failure.
2.3.7 Geologic Avoidance, Minimization and/or Mitigation Measures
The report concluded that the proposed project is geotechnically feasible, provided their
recommendations are incorporated into the project design and construction. Therefore, the
project will require consistency with Public Resources Code Section 2693(c). Environmental
impacts will be less than significant.
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2.4 Hydrology/Water Quality/Flood Control
2.4.1 Existing Hydrologic Setting
The total hydrologic area for San Ramon Canyon is 187 total acres of tributary from which
debris-laden flows spill out onto 25th Street and quickly overwhelm the existing deficient City of
Los Angeles storm drain system, which is suffering from dwindling interception capacity due to
sediment build up over the last 40-years. The proposed San Ramon Canyon Drainage System
will be designed to convey either a 100-year storm (debris-laden flows) out-letting to the coastal
bluff or a 50-year storm (clear water flows) out-letting into the CLA owned/maintained storm
drain.
Out of the 187 acres, 160 acres is located within the City of Rancho Palos Verdes with the
remaining 27 acres being tributary from the County of Los Angeles. The steep watershed
naturally concentrates run-off in high concentrations (Q100 = 262 cfs and Q50 = 217 cfs) at high
velocity flows for relatively short durations that are capable of conveying a considerable amount
of debris.
The periodic flooding associated with almost every storm event is significantly exacerbated by
the Tarapaca Landslide that provides a continuous source for new sediment to the creek bed,
which in turn is transported downstream to 25th Street. A vicious circle of undercutting of the
toe of the Tarapaca Landslide and subsequent land movement refills the creek bed with newly
loosened sediment. Further, the Tarapaca Landslide is redirecting powerful storm flows towards
the toe of the slopes of the two PDVE switchbacks resulting in an erosion rate of approximately
five feet per year, which could destabilize PVDE if it is allowed to encroach as little as 35-feet
additional towards the switchbacks into the toe of the existing slope.
The situation is further impacted by the deficient existing inlet structure at 25th Street that was
originally constructed as a 42” CMP culvert crossing under 25th Street resulting in a 25’ high
imported fill roadway embankment that constricted flows and eventually filled the depression
with sediment. Over the past 40 to 50 years, as sediment built up, the original inlet pipe was
extended multiple times to the new/raised sediment surface to allow at least some of the flow to
make it to the culvert crossing. More recently, growing environmental constraints contributed to
County of Los Angeles’ lack of maintenance for fear of disturbing nesting birds, etc. and/or
incurring fines for lack of proper environmental studies and clearances to do the required
maintenance work.
2.4.2 Coastal Zone/Coastal Barrier Resources
The City of Rancho Palos Verdes has developed a Local Coastal Plan (LCP) per the
requirements of the Coastal Zone Management Act (CZMA) of 1972 and the California Coastal
Commission requirements. In the coastal areas of the City, the LCP defines areas for
preservation of natural drainage systems, including hydrologic factors. For this project, the
coastal zone area is the portion of the project seaward of the lower PVDS switchback.
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Figure 18: Hydrology Map
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The proposed storm drain lies within a Coastal Resource Management (CRM) District with a
terrestrial designation of CRM-10. This is an area that contains other natural vegetation areas,
meaning that this District has some terrestrial wildlife value. The offshore waters in this CRM
are protected under the LCP as a marine preservation area, meaning that all marine resources
must be protected against impacts. They include kelp beds, abalone habitat, rock reef habitat and
their associated wildlife.
The Coastal Barrier Resources Act (CBRA) is managed by the Federal Emergency Management
Agency (FEMA) and implemented by the US Fish and Wildlife Service. The CBRA restricts
development on the Coastal Barrier Resources System (CBRS) which serves as an important
buffer between coastal storms and inland areas. Coastal barriers also provide a protective habitat
for aquatic plants and animals. Implementation of the LCP and Coastal Permit for the portion of
the project seaward of PVDS will be required to comply with the CBRA.
2.4.3 Water Quality and Stormwater Runoff
In 1972 Congress amended the Federal Water Pollution Control Act, making the addition of
pollutants to the waters of the United States (U.S.) from any point source unlawful unless the
discharge is in compliance with a National Pollutant Discharge Elimination System (NPDES)
permit. Known today as the Clean Water Act (CWA), Congress has amended it several times.
In the 1987 amendments, Congress directed dischargers of storm water from municipal and
industrial/construction point sources to comply with the NPDES permit scheme.
Watershed Management
The Los Angeles Regional Water Quality Control Board (RWQCB) has the responsibility to
require that projects address groundwater and water quality issues. Their authority extends to all
waters of the State (of California). Under the Porter-Cologne Act of 2003, the RWQCB has
extended its responsibilities to include impacts to water quality from non-point source pollution.
The storm drain project is located within the Santa Monica Bay Watershed Management Area
(WMA) of the LARWQCB and encompasses an area of approximately 414 square miles. Its
borders reach from the crest of the Santa Monica Mountains on the north and from the Ventura-
Los Angeles County line to downtown Los Angeles. From there it extends south and west across
the Los Angeles plain to include the area east of Ballona Creek and north of the Baldwin Hills.
A considerable number of monitoring programs have been implemented in the Santa Monica
Bay WMA, particularly over the last twenty years. Sampling efforts tend to center around
assessing urban runoff effects in general along the coastline and reservoirs of PCBs and DDT
contaminated sediment in the area of the Palos Verdes Shelf. Four statewide monitoring
programs, State Mussel Watch, Bay Protection and Toxic Cleanup, Coastal Fish Contamination
Program and Toxic Substances Monitoring, had focused on biological measurements.
The data from these programs indicate that in general the open coastline is much cleaner than the
Bay's enclosed waters, except with regards to DDT and PCBs on the Palos Verdes Shelf.
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Pollutants of particular concern are chlordane, DDT, copper, and zinc. The Bay Protection and
Toxic Cleanup Program (BPTCP) has listed the Santa Monica Bay - Palos Verdes Shelf area as a
toxic hot spot for DDT and PCBs human health advisories (fishing) and National Academy of
Science (NAS) exceedances of DDT levels in fish.
Section 303(d) of the Clean Water Act (CWA) requires that the State identify a list of impaired
water-bodies and develop and implement Total Maximum Daily Loads (TMDLs) for these
water-bodies (33 U.S.C. §1313(d)(1)). A TMDL specifies the maximum amount of a pollutant
that a water-body can receive, still meet applicable water quality standards and protect beneficial
uses.
Abalone Cove Beach, located east of the shore line from the proposed storm drain outlet
structure, is listed on the Clean Water Act (CWA) 303(d) List of Water Quality Limited
Segments as having High TMDL for nonpoint source pollutants and beach closures. The same
area is also listed with Low TMDL’s for DDT and PCB’s, also from non-point sources. A fish
consumption advisory for PCB’s has been listed for Abalone Cove Beach.
Storm Water Programs MS4/NPDES
The Los Angeles County Flood Control District, the County of Los Angeles, and 84 incorporated
cities within the Los Angeles County Flood Control District (permitees) discharge or contribute
to discharges of storm water and urban runoff from municipal separate storm sewer systems
(MS4s), also called storm drain systems. The discharges flow to water courses within the Los
Angeles County Flood Control District and into receiving waters of the Los Angeles Region.
These discharges are covered under countywide waste discharge requirements contained in
Order No. 96-054 adopted by the Regional Board on July 15, 1996. Order No. 96-054 also
serves as a National Pollutant Discharge Elimination System (NPDES) permit for the discharge
of municipal storm water into surface waters. The Report of Waste Discharge (ROWD), for
renewal of an NPDES permit, includes a proposed Storm Water Quality Management Program
(SQMP) and a Monitoring Program. The proposed SQMP contains programs in the following
areas: a) Public Information and Participation; b) Development Planning, c) Development
Construction, d) Public Agency Activities and e) Illicit Connection/Illicit Discharge Elimination
Program.
Construction General Permit (Order No. 2009-009-DWQ), adopted on September 2, 2009,
became effective on July 1, 2010. The permit regulates storm water discharges from
construction sites which result in a Disturbed Soil Area (DSA) of one acre or greater, and/or are
smaller sites that are part of a larger common plan of development. By law, all storm water
discharges associated with construction activity where clearing, grading, and excavation results
in soil disturbance of at least one acre must comply with the provisions of the General
Construction Permit. Construction activity that results in soil disturbances of less than one acre
is subject to this Construction General Permit if there is potential for significant water quality
impairment resulting from the activity as determined by the RWQCB. Operators of regulated
construction sites are required to develop storm water pollution prevention plans; to implement
sediment, erosion, and pollution prevention control measures; and to obtain coverage under the
Construction General Permit.
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Under the Los Angeles County existing MS4 Permit, the City of Rancho Palos Verdes will
require compliance with the NPDES for excavation, trenching, and dewatering adjacent to the
ocean and at the proposed inlet structure. A Storm Water Pollution Prevention Plan (SWPPP)
should be prepared to address construction storm water runoff. The SWPPP may be
incorporated into the City’s Water Quality Management Plan. All construction activity will be
required to comply with construction site runoff control minimum control measures, as outlined
by the LARWQCB.
2.4.4 Sole-source Aquifer/Drinking Water Supplies
The project is not located in or near the four (4) sites in California that have been designated as
sole-source aquifers (Fresno County Aquifer, Santa Margarita Aquifer - Scotts Valley [northern
California], Camp/Cottonwood Creek and Ocotillo-Coyote Wells Aquifers [southern
California/Mexico border]). Based on information from the City of RPV, the canyon does not
overlie a groundwater basin. Therefore the project will not impact drinking water supplies.
2.4.5 Flood Control
The base floodplain is defined as “the area subject to flooding by the flood or tide having a one
percent chance of being exceeded in any given year.” An encroachment is defined as “an action
within the limits of the base floodplain.”
Flood inundation hazards are those associated with major atmospheric events that result in the
inundation of developed area, due to overflows of nearby stream courses or inadequacies in local
storm drain facilities. The general project area is located within Flood Insurance Rate Map
(FIRM) panel 06037C2027F. Within the coastal region and throughout the City, the County
Flood Control District and the County Roads Department are responsible for the operation and
maintenance of flood control channels, storm drains, and culverts. Flood control and water
quality are tied to requirements from the LARWQCB which were previously discussed above.
2.4.6 Hydrologic Avoidance, Minimization and/or Mitigation Measures
NPDES Permit for General Construction Activities will be required for lineal trenching,
excavation and dewatering in accordance with the Regional Water Quality Control Board. The
NPDES permit will dictate the required water quality allowed to be discharged during
construction and specify BMP’s used during construction. The tunnel outlet point to the
beach will be required to be fully lined and bordered with sandbags so that no debris or
construction water of any kind is allowed to the ocean. The tunneling operations will be required
to use conveyors or other means other than hydraulic slurry pumping to convey the spoils so as
to prevent a potential spill onto to the beach.
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All spills, leaks or other losses of oils and other hazardous or toxic materials will be immediately
cleaned up. Under no circumstances is any hazardous or toxic material to be allowed in or near
the maintained drainage channel.
Figure 19: FIRM Flood Insurance Rate Map
2.5 Air Quality
2.5.1 Federal Regulatory Setting
The Federal Clean Air Act (FCAA) as amended in 1990 is the federal law that governs air
quality. The California Clean Air Act of 1988 is its companion state law. These laws, and related
regulations by the United States Environmental Protection Agency (U.S. EPA) and California
Air Resources Board (ARB), set standards for the quantity of pollutants that can be in the air. At
the federal level, these standards are called National Ambient Air Quality Standards (NAAQS).
NAAQS and State ambient air quality standards have been established for six transportation-
related criteria pollutants that have been linked to potential health concerns. The criteria
pollutants are: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter
(PM, broken down for regulatory purposes into particles of 10 micrometers or smaller – PM10
and particles of 2.5 micrometers and smaller – PM2.5), lead (Pb), and sulfur dioxide (SO2). In
addition, State standards exist for visibility reducing particles, sulfates, hydrogen sulfide (H2S),
and vinyl chloride. The NAAQS and State standards are set at a level that protects public health
with a margin of safety, and are subject to periodic review and revision. Both State and Federal
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regulatory schemes also cover toxic air contaminants (air toxics); some criteria pollutants are
also air toxics or may include certain air toxics within their general definition.
2.5.2 Climate
The climate in the City of Rancho Palos Verdes, as in all of Southern California, is controlled
largely by the strength and position of the subtropical high-pressure zone over the Pacific Ocean.
It maintains moderate temperatures between 67 degrees and 50 degrees Fahrenheit and
comfortable humidity’s, and limits precipitation to a few storms during the winter "wet" season.
Temperatures are normally mild with rare extremes above 100o or below freezing. Daily and
seasonal variations above the annual mean temperature are small.
Winds in the project area are almost always driven by the dominant land/sea breeze circulation
system. Regional wind patterns are dominated by daytime, on-shore sea breezes. At night, the
wind generally slows and reverses direction traveling toward the sea. Wind direction will be
altered by local canyons, with wind tending to flow parallel to the canyons. During the transition
period from one wind pattern to the other, the dominant wind direction rotates into the south and
causes a minor wind direction from the south. The frequency of calm winds (less than 5 miles
per hour) is less than 15 percent. Therefore, there is little stagnation in the coastal area,
especially during busy daytime traffic hours.
2.5.3 Air Quality Management
The City is located in the South Coast Air Basin (SCAB). Air quality management planning is
the responsibility of the South Coast Air Quality Management District (SCAQMD) and the
California Air Resources Board (CARB). The SCAQMD sets and enforces regulations for
stationary sources in the basin. The CARB is primarily responsible for controlling motor vehicle
emissions. The nearest air quality monitoring station is located to the east in Long Beach
(Station 72, Los Angeles County, APCD).
The SCAQMD in coordination with the Southern California Association of Governments
(SCAG) has developed an Air Quality Management Plan (AQMP) for the air basin. Due to the
trough-like nature of the basin, the SCAB has been designated a non-attainment area for ozone,
carbon monoxide, nitrogen dioxide, total suspended particulates, PM 2.5 and lead. The AQMP
has the goal of achieving healthful levels of air quality and is mandated by State and Federal
laws. Included in the plan are new stationary and mobile source controls, and controls on
indirect sources such as shopping centers or stadiums which attract large number of vehicles.
The AQMP is designed to accommodate a moderate amount of new development and growth
throughout the basin. The AQMP projections and mitigations are based on the SCAG Growth
Forecasts.
The proposed project would not adversely affect the AQMP. As stated previously, the AQMP is
designed to accommodate new development and growth based on SCAG Growth Forecasts.
Since the proposed storm drain construction would not directly generate new population or
growth, and is being considered primarily due to the condition of the existing San Ramon
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Canyon area drainage pattern, the criteria and issues of the AQMP are not applicable to the
project, and are not anticipated to be affected.
2.5.4 Ambient Air Quality
Air quality within the Rancho Palos Verdes area is dependent on the regional air quality and
local pollutant sources. Regional air quality is determined by the release of pollutants
throughout the air basin. The data indicates that mobile sources are the major source of regional
emissions. Motor vehicles account for 46 percent of reactive hydrocarbon emissions, 59 percent
of nitrogen oxide emissions, and 87 percent of carbon monoxide emissions.
As indicated above, the AQMP is designed to accommodate new development and growth based
on SCAG Growth Forecasts. The proposed storm drain construction would not directly generate
new population or growth and therefore would not impact ambient air quality standards in
Rancho Palos Verdes.
2.5.5 Short Term Construction Activity
The California standard for total suspended particulates has been defined as particles less than 10
micrometers aerodynamic diameter (PM10). The standards are 30 ug/m3 (annual geometric
mean) and 50 ug/m3 (24 hour average).
For regionally important pollutants, the SCAQMD has identified emission levels that should be
considered as potentially regionally significant. For construction activities, the AQMD’s
significance thresholds are as follows:
AQMD’s SIGNIFICANCE THRESHOLDS
Regional Organic Gases (ROG) 75 lbs/day
Nitrogen Oxides (NOx) 100 lbs/day
Particulate Matter (PM-10) 150 lbs/day
Sulfur Oxides (SOx) 150 lbs/day
Carbon Monoxide (CO) 550 lbs/day
These thresholds, in conjunction with any microscale violations of clean air standards in the
immediate vicinity of any construction activity, are therefore the appropriate criteria by which to
evaluate air quality impacts.
Short-term temporary impacts will result from construction activities associated with proposed
storm drain. Air pollutants will be emitted by construction equipment which will be emitted into
the atmosphere from equipment exhaust. Secondary construction-related impacts to air quality
will result from fugitive dust emitted from excavation and backfill. Air pollutants will also be
emitted from construction worker commutes. Project-related impacts are anticipated to be short-
term in duration, and will occur only during construction of the project. Mitigation measures
will be implemented to ensure low sulfur fuel burning construction equipment and dust control.
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Construction of the entire length of the storm drain would not occur simultaneously due to traffic
issues.
Construction activities generate substantial quantities of large diameter material. Such dust,
which settles out on nearby parked cars, foliage, and other surfaces, is more of a soiling nuisance
than a potential health impact. It is, however, the greatest source of nuisance complaints when
construction activities occur in close proximity to sensitive receptors such as schools, residences,
and churches. Based on the approximate length of the proposed storm drain and the proposed
construction schedule of approximately 5 to 30 lineal feet per day, it is estimated that excavation
activity will take approximately 86 weeks (21.5 months) with a total construction schedule of 69
weeks (17 months) due to overlapping operations.
A program of good housekeeping and dust control will be implemented to reduce nuisance
potential. With such a program, and given the transitory nature of impact potential, soiling
nuisance impacts can be maintained at less than significant levels. Recommended measures for
such control are listed under impact mitigation.
Heavy-duty equipment emissions are difficult to quantify because of day-to-day variability in
construction activities and equipment used. However, based on the type of trenching excavation
proposed, backhoes, front-end wheeled loaders, and heavy trucks, are equipment typical of
construction activities of this sort. Typical emission rates for a front-end wheeled loader are
provided below.
TYPICAL EMISSION RATES FOR WHEELED LOADER
(Grams per Hour)
POLLUTANTS EMISSION RATE
Carbon Monoxide 260
Nitrogen Oxides 858
Hydrocarbons 113
Sulfur Oxides 83
Particulates 78
Source: SCAQMD, Air Quality Handbook
Emissions will be generated by construction equipment and at times may seem excessive to
adjacent residents. However, the level of impact can be mitigated to less than significant levels
with appropriate mitigation. While approximately 90% of construction equipment utilizes sulfur
burning diesel fuels, SCAQMD requires construction equipment to utilize at least low-sulfur
burning fuels. Non-sulfur burning construction vehicles may be cost prohibitive under the City’s
current budget for this project. Therefore the use of non-sulfur burning fuel use will be a
recommendation and not a requirement.
In summary the proposed project will not result in construction-related emissions which are
expected to exceed impact significance thresholds for any of the regionally significant pollutants.
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No short-term or long-term impacts on climate or air quality management are anticipated. All
such construction related air impacts are considered less than significant, given the
recommended measures to mitigate temporary impacts and the short duration of construction.
2.5.6 Greenhouse Gases and Global Climate Change
Climate change refers to long-term changes in temperature, precipitation, wind patterns, and
other elements of the earth's climate system. An ever-increasing body of scientific research
attributes these climatological changes to greenhouse gases (GHGs), particularly those generated
from the production and use of fossil fuels.
Regulatory Setting
Senate Bill No. 97, Chapter 185, amended CEQA guidelines to be able to address Greenhouse
Gases (GHG) and the effects of Global Warming/Climate Change. The California Global
Warming Solutions Act of 2006 (Assembly Bill No. 32) designates the State Air Resources
Board as the state agency charged with monitoring and regulating sources of emission of
greenhouse gases that cause global warming in order to reduce emission of greenhouse gases.
This bill will require the California State Office of Planning and Research, by July 1, 2009, to
prepare, develop, and transmit to the Resource Agency guidelines for the feasible mitigation of
greenhouse gas emissions or the effect of greenhouse gas emissions, as required by CEQA,
including, but not limited to, effects associated with transportation or energy consumption.
Greenhouse Gas Emissions
Common GHG include water vapor, carbon dioxide, methane, nitrous oxides,
chlorofluorocarbons, hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride (SF6), ozone,
and aerosols. Natural processes and human activities emit GHG. The accumulation of GHG in
the atmosphere regulates the earth’s temperature. Without the natural heat trapping effect of
GHG, the earth’s surface would be about 34 degrees Centigrade (°C) cooler (CAT 2006).
However, it is believed that emissions from human activities, such as carbon based electricity
production and vehicle use, have elevated the concentration of these gases in the atmosphere
beyond the level of naturally occurring concentrations.
Auto Emissions
The United States Bureau of Transportation Statistics suggests that an average United
States “trip” is about 11.4 miles. The amount of gasoline consumed per year can be
estimated by multiplying the total miles traveled per project trip by the United States fuel
economy average of 25 miles per gallon. Combustion of one gallon of gasoline produces
about 19 pounds of carbon dioxide.
Electrical Power Emissions
Electrical power greenhouse gas emissions are a function of total project demand.
Approximately 343 tons of carbon dioxide is produced for each megawatt hour of power
generated by California electrical suppliers.
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Natural Gas Emissions
Greenhouse gas emissions associated with the combustion of natural gas are a function of
natural gas use at buildout and carbon dioxide emissions produced when a unit of natural
gas is combusted. Natural Gas produces approximately 0.05467 tons of carbon dioxide
per 1,000 cubic feet combusted.
Other Greenhouse Gas Emissions
Emissions not included above include methane emissions from sources such as
wastewater treatment plants, solid waste that is landfilled, and potentially other non-
carbon dioxide greenhouse gas emissions that occur as a result of a project (e.g., sulfur
hexafluoride emissions from transformers installed as part of electrical infrastructure).
Landfill emissions are separately regulated and methane gas recovery is a required
element of that regulatory program
Implementation
The approaches to CEQA analysis of climate change and GHG emissions are in their
infancy and still evolving. Lead agencies throughout the State have approached GHG in
various ways. Several White Papers have been developed and reviewed as part of this
Initial Study for applicability to this project.
CEQA requires an agency to engage in forecasting “to the extent that an activity could
reasonably be expected under the circumstances. An agency cannot be expected to predict the
future course of governmental regulation or exactly what information scientific advances may
ultimately reveal.” (CEQA Guidelines section 15144, citing the California Supreme Court
decision in Laurel Heights Improvement Association v. Regents of the University of California
[1988] 47 Cal. 3d 376). CEQA does not require an agency to evaluate an impact that is “too
speculative” provided that the agency identifies the impact, engages in a “thorough
investigation” but is “unable to resolve an issue,” and then discloses its conclusion that the
impact is too speculative for evaluation. (CEQA Guidelines Section 15145). Additionally,
CEQA requires that impacts be evaluated at a level that is “specific enough to permit informed
decision making and public participation” with the “production of information sufficient to
understand the environmental impacts of the Proposed Project and to permit a reasonable choice
of alternatives so far as environmental aspects are concerned.” (CEQA Guidelines Section
15146).
Global Climate Change impacts are a result of cumulative emissions from anthropogenic
activities in the region, the State, and the world. Based on an investigation of compliance with
local air quality thresholds and future long-term operational impacts, the proposed Project would
not have the potential to result in emissions associated with greenhouse gas emissions and global
climate change.
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2.5.7 Air Quality Resource Avoidance, Minimization and/or Mitigation Measures
Short-term temporary impacts will result from construction activities associated with the
proposed storm drain. Air pollutants will be emitted by construction equipment which will be
emitted into the atmosphere from equipment exhaust. Secondary construction-related impacts
to air quality will result from fugitive dust emitted from excavation and backfill. Air pollutants
will also be emitted from construction worker commutes. Project-related impacts are
anticipated to be short-term in duration, and will occur only during construction of the project.
While approximately 90% of construction equipment utilizes sulfur burning diesel fuels,
SCAQMD requires construction equipment to utilize at least low-sulfur burning fuels. Non-
sulfur burning construction vehicles may be cost prohibitive under the City’s current budget for
this project. Therefore the use of non-sulfur burning fuel use will be a recommendation and not
a requirement.
No short-term or long-term impacts on climate or air quality management are anticipated. All
such construction related air impacts are considered less than significant, given the
recommended measures to mitigate temporary impacts and the short duration of construction.
The proposed storm drain project will create certain GHG’s during construction of the facility
primarily from construction equipment. The final project, after construction, will not create
GHG’s.
2.6 Noise Resources
2.6.1 Regulatory Setting
The National Environmental Policy Act (NEPA) of 1969 and the California Environmental
Quality Act (CEQA) provide the broad basis for analyzing and abating highway traffic noise
effects. The intent of these laws is to promote the general welfare and to foster a healthy
environment. The requirements for noise analysis and consideration of noise abatement and/or
mitigation, however, differ between NEPA and CEQA.
CEQA requires a strictly baseline versus build analysis to assess whether a proposed project will
have a noise impact. If a proposed project is determined to have a significant noise impact under
CEQA, then CEQA dictates that mitigation measures must be incorporated into the project
unless such measures are not feasible.
For highway transportation projects with FHWA (and the Department, as assigned)
involvement, the federal-Aid Highway Act of 1970 and the associated implementing regulations
(23 CFR 772) govern the analysis and abatement of traffic noise impacts. The regulations
require that potential noise impacts in areas of frequent human use be identified during the
planning and design of a highway project. The regulations contain noise abatement criteria
(NAC) that are used to determine when a noise impact would occur. The NAC differ depending
on the type of land use under analysis. For example, the NAC for residences (67 dBA) is lower
than the NAC for commercial areas (72 dBA).
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2.6.2 Noise Impact Avoidance, Minimization and/or Mitigation Measures
Ambient noise levels were not analyzed as part of this document because the final project, after
construction, will not expose persons to or generate noise levels in excess of standards
established in the local general plan or noise ordinance, or applicable standards of other agencies.
However, the project will result in short term construction related noise and vibration because
it includes tunnel drilling activity, temporary equipment staging, grading, etc. The project will
not create the potential for adverse construction-related noise impacts because all construction
will occur during normal working hours. No construction will occur at night or on Sundays.
Contractors will be required to comply with City Noise Ordinances and Caltrans noise
reduction requirements.
The noise impacts during construction could be mitigated to less than significant levels by
limiting hours of construction, maintaining construction equipment in good working order, and
prohibiting certain construction related activities such as rock crushing.
Tunneling activity may trigger canyon wall and landslide failure during construction. No
impacts to downstream mobile home park residents are anticipated. Construction worker risks
will be minimized by implementation of construction safety specifications.
2.7 Traffic and Circulation
The Transportation Systems section of the City’s General Plan provides a component for the
discussion of transportation infrastructure. The transportation infrastructure has been divided
into 3 major elements:
Vehicular Networks
Public Transportation
Path and Trail Networks
The City of Rancho Palos Verdes Traffic Safety Commission is responsible for implementation
of the Transportation Systems goals and policies.
There are no developed streets or roads within San Ramon Canyon. The closest streets include
PVDE to the west and W. 25th Street to the south. As noted in prior sections of this document,
PVDE is in eminent danger of failure in the next 7 to 8 years. W. 25th Street is annually
inundated by storm flows that are greater than the existing inlet structure can handle, and water,
dirt, rock and debris is washed onto and across W. 25th Street.
2.7.1 Vehicular Networks
Palos Verdes Drive South is a 4-laned registered scenic highway and a major arterial for the City
connecting the south-eastern portion of the City with San Pedro and Los Angeles further east.
The City’s General Plan indicated that Palos Verdes Drive South is approaching estimated peak
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hour capacities. Traffic impacts due to construction will be mitigated with traffic control
requirements upon the construction contractor, consistent with the City of Rancho Palos Verdes
traffic safety program.
Palos Verdes Drive East is a 2-laned major arterial road. The PVDE switchbacks are a
significant ingress and egress for residents, commuters and emergency personnel. Based on the
geotechnical documentation, the canyon walls are eroding at an average rate of about 5 feet per
year. The existing slope face would only need to erode back approximately 35 to 40 feet before
the road way would be in a state of imminent failure.
2.7.2 Public Transportation
Public transportation stops along PVDS and PVDE will not be impacted by the proposed project
because there are no transit stops in the vicinity of the proposed storm drain project.
Nonetheless, any lane closures due to construction will require public transportation stops and
facilities to remain accessible at all times.
2.7.3 Path and Trail Networks
Walkways, bikeways and equestrian trails make up the classification referred to as Path and Trail
Networks. The importance of path and trail networks also relates to recreation and
environmental amenities. Any lane closures due to construction will require walkways and
bikeways along Palos Verdes Drive South to remain accessible at all times. There are no Class
bikeways along either PVDE or W. 25th Street. Any lane closures due to construction will
require walkways and bikeways to remain accessible at all times.
2.7.4 Traffic Impact Avoidance, Minimization and/or Mitigation Measures
During construction, short-term related traffic impacts may result. However, these impacts can
be mitigated to less than significant levels through traffic control measures, construction timing
and construction phasing to avoid peak hours.
The City will ensure that roads are open during construction to at least one lane of traffic in two
directions, with the use of flaggers. Open trenches will be covered with steel plates during non-
working hours.
2.8 Land Use
The project area is in an undeveloped condition, except for PVDE roadway to the west, and W.
25th Street roadways to the south. Overhead utility lines are located on the east side of the
canyon, outside of the project area. Land use designations for this area of the City of Rancho
Palos Verdes include the following:
General Plan designation: Natural Environmental Hazard
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Zoning designation: Open Space Hazard (OH).
Land uses surrounding the canyon to the north, northeast and northwest are single family
residences within the City of Rancho Palos Verdes. Land use to the south includes higher
density residential in the City of Los Angeles, commonly referred to as the Palos Verdes Shores
mobile home park south of W. 25th Street.
2.8.1 Land and Water Conservation Fund
Based on information from the City of Rancho Palos Verdes, Land and Water Conservation
Fund Act funds have not been used in or near the project area. Therefore the project will not
have the potential to affect properties acquired or improved with Land and Water Conservation
Fund Act funds.
2.8.2 Environmental Justice Geographic Assessment / Relocation Impacts
All projects involving a federal action (funding, permit, or land) must comply with Executive
Order (EO) 12898, Federal Actions to Address Environmental Justice in Minority Populations
and Low-Income Populations, signed by President Clinton on February 11, 1994. This
Executive Order directs federal agencies to take the appropriate and necessary steps to identify
and address disproportionately high and adverse effects of federal projects on the health or
environment of minority and low-income populations to the greatest extent practicable and
permitted by law. Low income is defined based on the Department of Health and Human
Services poverty guidelines.
This section identifies minority and low income populations that exist within the project area
and evaluates whether the environmental impacts (if any), or each alternative, would result in a
disproportionately high and adverse impact on minority and low income populations. Based on
review of the Environmental Justice area of the EPA EJView web site, the project is located
within an area with per capita income from surrounding property owners averaging
approximately $37,000 to $64,000 annually. Zero to 10% of the population in this area is
below poverty, does not have a college education and all residents speak English. Only 20 to
20% of the population in this area are minorities.
No minority or low-income populations that would be adversely affected by the proposed
project have been identified as determined above. Therefore, this project is not subject to the
provisions of EO 12898.
2.8.3 Growth
The Council on Environmental Quality (CEQ) regulations, which established the steps necessary
to comply with the National Environmental Policy Act (NEPA) of 1969, require evaluation of
the potential environmental consequences of all proposed federal activities and programs. This
provision includes a requirement to examine indirect consequences, which may occur in areas
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beyond the immediate influence of a proposed action and at some time in the future. The CEQ
regulations, 40 CFR 1508.8, refer to these consequences as secondary impacts. Secondary
impacts may include changes in land use, economic vitality, and population density, which are
all elements of growth.
The California Environmental Quality Act (CEQA) also requires the analysis of a project’s
potential to induce growth. CEQA guidelines, Section 15126.2(d), require that environmental
documents “…discuss the ways in which the proposed project could foster economic or
population growth, or the construction of additional housing, either directly or indirectly, in the
surrounding environment…”
The proposed project is meant to protect existing residences and will not promote growth in new
areas.
2.8.4 Land Use Impact Conclusions
The project is consistent with land use plans and policies and will not create significant land
use issues. The project will not create land use impact to surrounding residents or growth
inducing impacts on the community.
2.9 Aesthetic/Visual Resources
2.9.1 Regulatory Setting
The National Environmental Policy Act of 1969 as amended (NEPA) establishes that the federal
government use all practicable means to ensure all Americans safe, healthful, productive, and
aesthetically (emphasis added) and culturally pleasing surroundings (42 USC 4331[b][2]). To
further emphasize this point, the Federal Highway Administration (FHWA) in its implementation
of NEPA (23 USC 109[h]) directs that final decisions regarding projects are to be made in the
best overall public interest taking into account adverse environmental impacts, including among
others, the destruction or disruption of aesthetic values.
Likewise, the California Environmental Quality Act (CEQA) establishes that it is the policy of
the state to take all action necessary to provide the people of the state “with…enjoyment of
aesthetic, natural, scenic and historic environmental qualities.” (CA Public Resources Code
Section 21001[b]).
2.9.2 Visual Resource Mitigation
As part of this environmental document, photo simulations have been prepared so the lead
agent and approving body of the City of RPV can see beforehand, when the final project will
look like (Photos 18 and 19 and appendices). There will be no new light or glare created by the
inlet structure of buttress fill. The outlet structure will be camouflaged to the extent possible
with neutral tone concrete and faux rock.
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Photo 18: Photo simulation of outlet structure.
Photo 19: Simulation of post construction buttress fill and re-vegetation.
2.10 Hazardous Materials/Hazardous Waste
2.10.1 Regulatory Setting
Hazardous materials and hazardous wastes are regulated by many state and federal laws. These
include not only specific statutes governing hazardous waste, but also a variety of laws regulating
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air and water quality, human health and land use. The primary federal laws regulating hazardous
wastes/materials are the Resource Conservation and Recovery Act of 1976 (RCRA) and the
Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA).
The purpose of CERCLA, often referred to as Superfund, is to clean up contaminated sites so that
public health and welfare are not compromised. RCRA provides for “cradle to grave” regulation of
hazardous wastes. Other federal laws include:
Community Environmental Response Facilitation Act (CERFA) of 1992
Clean Water Act
Clean Air Act
Safe Drinking Water Act
Occupational Safety and Health Act (OSHA)
Atomic Energy Act
Toxic Substances Control Act (TSCA)
Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)
In addition to the acts listed above, Executive Order 12088, Federal Compliance with Pollution
Control, mandates that necessary actions be taken to prevent and control environmental pollution
when federal activities or federal facilities are involved.
Hazardous waste in California is regulated primarily under the authority of the federal Resource
Conservation and Recovery Act of 1976, and the California Health and Safety Code. Other
California laws that affect hazardous waste are specific to handling, storage, transportation, disposal,
treatment, reduction, cleanup and emergency planning. Worker health and safety and public safety
are key issues when dealing with hazardous materials that may affect human health and the
environment. Proper disposal of hazardous material is vital if it is disturbed during project
construction.
2.10.2 Project Summary and Conclusions
The following local and State-maintained databases were reviewed: State NPL and CERCLIS,
LUST, UST, SWIS, RCRA, ERNS, Oil and Gas Wells, HWIS. The ADL registry for the DoD
(Department of Defense) was consulted for this project area and the results were negative. Since no
structures are located within the project street area, Lead Based Paints and Asbestos Containing
Materials will not be impacted.
One RCRA site noted is South Bay Industrial Services, Inc., which is located at 2701 San Ramon
Drive, RPV, CA. This hazardous materials handler disposes used oil and is fully permitted. No
violations were noted. No impacts from this REC are anticipated.
Saundra F. Jacobs, REA 04694, with SFC Consultants is a qualified Registered Environmental
Assessor with over 21 years of experience in hazardous materials and environmental compliance.
Based on the site visit conducted in June 2010 and again on Aug. 25, 2011, it is my opinion that the
Recognized Environmental Concerns (REC’s) noted in the database and field verified, does not
impact the project.
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3.0 Project Environmental Consequences/Impacts and Mitigation
The Lead Agency (City of Rancho Palos Verdes) must adopt a mitigation monitoring or reporting
program pursuant to Section 21081.6 of the Public Resources Code, California Environmental
Quality Statutes, upon approval of a mitigated Negative Declaration. The purpose of the program is
to ensure compliance with the required mitigation measures or project revisions during project
implementation. Section 21081.6 also requires that mitigation measures be adopted as conditions of
approval. Environmental issues that require mitigation to bring impacts to less than significant
levels have been included in this section.
Initial
Study
Designation
Mitigation Description Implementation and Timing
1 a, b, c Aesthetics. The vegetation within the storm drain
right-of-way (ROW) impacted due to construction
will be replaced.
Re-vegetation may also take the form of a passive
park and trailhead.
The outlet structure at the beach will be designed and
constructed to “hide” the structure to the greatest
extent possible
City of Rancho Palos Verdes will inspect the
re-vegetation within 90-days after
construction to ensure proper coverage.
Design and construction options will be
presented to the public works dept. for
approval.
The access roads will be paved with an earth
tone color to blend with the natural
surroundings.
3 a, b
Air Quality. Short-term construction related air
quality impacts may be associated with truck
emissions. While idling of some of the construction
trucks may be necessary, potential impacts will be
mitigated by utilizing the City of Rancho Palos
Verdes standard Best Management Practices for
construction. These measures include but are not
limited to: maintaining construction equipment in
good working condition, avoiding construction
equipment idling in residential areas and utilizing
low-sulfur burning fuels. Impacts are therefore less
than significant with mitigation incorporated.
Particulate matter emissions (PM10) will be
controlled by the contractor with watering trucks.
City of Rancho Palos Verdes Public Works
Department to verify that construction
contractors utilize standard Best
Management Practices for avoiding short-
term related air quality impacts, by
incorporation of conditions into project
specifications. BMP’s are currently listed on
the design drawings and are incorporated by
reference.
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4 a, b, c, e, f Biological Resources.
Implementation of the City’s NCCP through:
Landscape Establishment Conformance Mitigation
Plan would include the following:
o All related coordination and specification
preparation required to enforce this
establishment / mitigation plan as
conditioned by the MND/FONSI and
outside regulatory agencies.
o The plan will include a description of the
enhancement and restoration activities,
timelines, plant palettes, maintenance and
monitoring for at least 0.21 acres of
jurisdictional impacts. Total re-vegetated
area will likely be greater.
The monitoring would include:
o Detailing physical work to be performed by
others to prevent the re-invasion of non-
native plants.
o Prepare annual report after the initial
mitigation implemented, photo
documentation from designated “photo
stations.”
o Documentation of re-vegetation survival
percentages/sizes/species.
o Direct/document the number and species of
replacement plants (shrubs & trees).
o Documentation of the methods used to
assess all parameters.
o Survival goals include: minimum of 80% on
year one and 100% thereafter and/or 75%
coverage with native woody species after
3-years and 90% after 5-years. Non-native
species shall comprise less that 5% of the
cover after 5-years. Monitoring and
replacement plants will required for the 5-
year period mentioned, with the option of
stopping the plan 2-years prior IF all
success criteria is met.
We recommend the following be included:
A qualified biologist/plant restoration
specialist to retrieve and replant Southern
Coastal Bluff Scrub, Island Green Dudleya
and Aphanisma species that may be
impacted, prior to construction on the bluff.
All spills, leaks or other losses of oils and
other hazardous or toxic materials will be
immediately cleaned up. Under no
circumstances is any hazardous or toxic
material to be allowed in or near the
maintained drainage channel.
Preconstruction survey and species
relocation if necessary for the Black
Abalone.
The City of Rancho Palos Verdes shall
ensure that the USACOE 404 consultation,
CDFG 1602 Agreement and RWQCB 401
concurrence is applied for at least 90 days
prior to construction.
City of Rancho Palos Verdes will inspect the
re-vegetation within 90-days after
construction to ensure proper coverage.
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5 Cultural Resources. Native American monitoring
during excavation will be recommended.
Should unanticipated cultural resource remains be
encountered during land modification activities,
work must cease and be relocated, and the lead
agency contacted immediately to determine
appropriate measures to mitigate adverse impacts to
the discovered resources. Cultural resource remains
may include artifacts, shell, bone, features, altered
soils, foundations, trash pits and privies, etc. If
human remains are encountered during excavations
associated with this project, all work must halt, and
the County Coroner must be notified (Section 7050.5
of the California Health and Safety Code). The
coroner will determine whether the remains are of
forensic interest. If the coroner, with the aid of the
supervising archaeologist, determines that the
remains are prehistoric, the coroner will contact the
Native American Heritage Commission (NAHC).
The NAHC will be responsible for designating the
most likely descendant (MLD), who will be
responsible for the ultimate disposition of the
remains, as required by Section 5097.98 of the
Public Resources Code. The MLD should make
his/her recommendations within 48 hours of their
notification by the NAHC. This recommendation
may include A) the nondestructive removal and
analysis of human remains and items associated with
Native American human remains; (B) preservation of
Native American human remains and associated
items in place; (C) relinquishment of Native
American human remains and associated items to the
descendants for treatment; or (D) other culturally
appropriate treatment.
The City of Rancho Palos Verdes Public
Works Dept. will require the contractor to
provide Native American monitoring during
excavation of the inlet structure.
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9 a, k Hydrology and Water Quality. NPDES Permit for
General Construction Activities will be required for
lineal trenching, excavation and dewatering in
accordance with the Regional Water Quality Control
Board. The NPDES permit will dictate the required
water quality allowed to be discharged during
construction and specify BMP’s used during
construction. The tunnel outlet point to the
beach will be required to be fully lined and bordered
with sandbags so that no debris or construction water
of any kind is allowed to the ocean. The tunneling
operations will be required to use conveyors or other
means other than hydraulic slurry pumping to convey
the spoils so as to prevent a potential spill onto to the
beach.
All spills, leaks or other losses of oils and other
hazardous or toxic materials will be immediately
cleaned up. Under no circumstances is any hazardous
or toxic material to be allowed in or near the
maintained drainage channel.
The City will also be required to prepare a
Water Quality Management Plan as part of
its mitigation of water quality impacts from
construction and trenching activity.
12 a, d Noise. The proposed project is anticipated to have a
short-term noise and vibration impacts during
construction and less than significant impacts after
construction. The impacts during construction could
be mitigated to less than significant by limiting hours
of construction and maintaining construction
equipment in good working order.
The City of Rancho Palos Verdes Public
Works Department shall verify contractor
compliance with standard noise reduction
requirements during construction.
16 a, c, d Traffic and Circulation. During construction,
short-term related traffic impacts may result.
However, these impacts can be mitigated to less than
significant levels through traffic control measures,
construction timing and construction phasing to
avoid peak hours.
The City will ensure that roads are open during
construction to at least one lane of traffic in two
directions, with the use of flaggers. Open trenches
will be covered with steel plates during non-working
hours.
During construction, the City of Rancho
Palos Verdes Public Works Department shall
provide alternative parking areas and verify
that residents within the trailer part on W.
25th Street can enter and exit the street at all
times. The City will also facilitate good
communication with residents through public
notices of impacted parking areas and
construction times.
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NEPA Checklist
CEQA Initial Study Checklist
Project Title: San Ramon Canyon Storm Drain Tunnel Improvements.
Lead Agency Name and Address: City of Rancho Palos Verdes
Public Works Dept.
30940 Hawthorne Blvd.
Rancho Palos Verdes, CA 90275
Contact Persons and Phone Number: Mr. Alan Braatvedt, P.E. (310) 544-5253
Mr. Eduardo Schonborn, AICP (310) 544-5228
Project Location: San Ramon Canyon, north and south of W.25th Street/Palos Verdes Drive East, in
the City of Rancho Palos Verdes, Los Angeles County, California.
Description of the Undertaking/Project Description: The project undertaking would include a new
mid-canyon storm drain inlet structure and tunnel alignment north of W. 25th Street that would
gravity flow through the tunnel to a cut and covered section of buried pipe located south of W. 25th
Street, and transition into a second tunnel to a new outlet structure at the base of the bluff. Total
storm drain alignment is approximately 4,200 lineal feet of 54-inch diameter pipe from inlet to
outlet. Total tributary area draining into the new storm drain would be 123.7 acres. The existing
48” storm drain below W. 25th Street that is within the City of Los Angeles would remain in place
and serve as backup as necessary. No improvements or cleaning are proposed to the existing storm
drain system, which is located in the City of Los Angeles.
General Plan Designation: Natural Environment/Hazard
Zoning: OH Open Space Hazard
Existing Environment, Surrounding Land Uses and Setting: The open space areas of San Ramon
Canyon are comprised of non-native grasslands, coastal sage scrub and bare slopes in the steep
canyon area. Photos of existing settings are provided below. Surrounding land uses are generally
residential and natural open space. Detailed existing settings will be provided in the Environmental
Assessment and Mitigated Negative Declaration.
List of Participants and Other federal and state agencies consulted as part of the document/Cross
Cutters (e.g. permits, financing approval, or participation agreement):
EPA Region 9 (Pacific Southwest)
Federal Highway Administration
U.S. Fish and Wildlife Services
U.S. Army Corp of Engineers
California Department of Fish and Game
California Department of Transportation
California Coastal Commission
Los Angeles Regional Water Quality Control Board
City of Rancho Palos Verdes
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NEPA EA and CEQA IS
2
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED
The environmental factors checked below would be potentially affected by this project, involving at
least one impact that is a "Potentially Significant Impact" as indicated by the checklist of
environmental impacts and mitigation on the following pages.
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NEPA EA and CEQA IS
3
DETERMINATION: On the basis of this initial evaluation:
I find that the proposed project COULD NOT have a significant effect on the environment, and an
ENVIRONMENTAL ASSESSMENT - NEGATIVE DECLARATION will be prepared.
I find that although the proposed project could have a significant effect on the environment, there will not
be a significant effect in this case because the mitigation measures described on an attached sheet have
been added to the project and revisions in the project have been made by or agreed to by the project
proponent. An ENVIRONMENTAL ASSESSMENT/FINDING OF NO SIGNIFICANT IMPACT -
MITIGATED NEGATIVE DECLARATION will be prepared.
X
I find that the proposed project MAY have a significant effect on the environment, and an
ENVIRONMENTAL IMPACT STATEMENT - REPORT is required.
I find that the proposed project MAY have a "potentially significant impact" or "potentially significant
unless mitigated" impact on the environment, but at least one effect (1) has been adequately analyzed in an
earlier document pursuant to applicable legal standards, and (2) has been addressed by mitigation
measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL
IMPACT STATEMENT - REPORT is required, but it must analyze only the effects that remain to be
addressed.
I find that although the proposed project could have a significant effect on the environment, because all
potentially significant effects (a) have been analyzed in an earlier EIS - EIR or EA/FONSI - NEGATIVE
DECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to
that earlier EIS - EIR or EA/FONSI - NEGATIVE DECLARATION, including revisions or mitigation
measures that are imposed upon the proposed project, nothing further is required.
Eduardo Schonborn November 16, 2011_______________
Signature Date
Mr. Eduardo Schonborn, AICP
Name
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NEPA EA and CEQA IS
4
NEPA Environmental Compliance Checklist
YES NO
X 1. Is the facility located in an officially designated wilderness area?
According to a review of the California Natural Resources Agency Land Resources Map and the Department of
Agriculture’s list of wilderness areas (http://www.wilderness.net/index.cfm?fuse=NWPS), the Project Site is not
located in an officially designated wilderness area. In addition, according to SFC’s review of available on-line
resources, the Project Site is not located in a National Park (www.nps.gov/gis), National Park Service
Interactive Map Center, a designated Scenic and Wild River (http://www.rivers.gov/wildriverslist.html), a land
area managed by the Bureau of Land Management www.blm.gov/nhp/facts/index.htm), or within 1 mile of a
National Scenic Trail as identified by the National Park Service
http://www.nps.gov/ncrc/programs/nts/nts_trails.html). The Deane Dana Friendship Community Regional
Park is located east of the project but will not be impacted.
X 2. Is the facility located in an officially designated wildlife preserve?
According to a review of the California Natural Resources Agency Land Resources Map, the Project Site is not
located in an officially designated wildlife preserve. In addition, according to SFC’s review of available on-line
resources, the Project Site is not located in a US Fish and Wildlife Service National Wildlife Refuge
(http://www.fws.gov/refuges/refugeLocatorMaps/index.html).
X
3. Will/may the facility (i) affect listed, threatened or endangered species or designated critical habitats; or (ii.) likely jeopardize the
continued existence of any proposed endangered or threatened species or likely result in the destruction or modification of
proposed critical habitats?
Approximately 0.34 acres of Coastal Sage Scrub (CSS) may be permanently impacted due to construction of
this project. The resulting impacts from construction of the outlet structure at the bluff would include
approximately 0.02 acres of Southern coastal bluff scrub. The City NCCP identifies the lower San Ramon
Canyon repair as an approved project with an allowable impact area maximum of 2.0 acres of CSS habitat,
and 6.0 acres of non-native grassland habitat. Based on the biological report prepared for this project, the 0.34
acres of CSS habitat. 0.02 acres of coastal bluff scrub, and 1.36 acres of grassland habitat will not exceed the
allowable maximum for the NCCP approved project. Application of the NCCP allowable acreages will become
the necessary mitigation for this impact.
Site specific California gnatcatcher protocol surveys were conducted during the 2011 breeding season as part of
the NEPA/CEQA document. No gnatcatchers were found. No further mitigation is required.
Based on the biological report and the wetlands delineation, the jurisdictional drainage of San Ramon Canyon
does not support any wetlands or riparian habitat. However, the project will impact approximately 0.07 acres
of jurisdictional drainage. Impacts from the canyon and jurisdictional fill will be mitigated by post-
construction re-vegetation of the new streambed at a 3:1 ratio or a total of 0.21 acres. The Landscape
Establishment Conformance Mitigation Plan details are included in Section 3.0 of the MND. Impacts are
considered less than significant with mitigation incorporated.
X 4. Will/may the facility affect districts, sites, buildings, structures or objects significant in American history, architecture,
archaeology, engineering or culture, that are listed, or eligible for listing in the National Register of Historic Places?
The project will not disturb any human remains, including those interred outside of formal cemeteries.
Because of the flood “flushing” effect, the canyon is basically sterile of cultural resources. The cultural
INITIAL STUDY ATTACHMENT-93
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
5
resource survey conducted over the project area and construction access roads concluded that no cultural
resources are located in the project area and additional mitigation is not required. Further, the presence of
cultural resources is extremely low because it is unlikely that burial locations would have been sited in a
streambed. Thus, impacts are considered less than significant. However, it is important to note that Native
American monitoring was recommended by at least 2 tribes for the Los Angeles coastal area. As such, Native
American monitoring will be recommended as part of the MND mitigation.
X 5. Will/may the facility affect Indian religious sites?
Native American monitoring was recommended by at least 2 tribes for the Los Angeles coastal area. As such,
Native American monitoring will be recommended as part of the EA MND.
X 6. Is the facility located in a floodplain?
The proposed project includes construction of a new storm drain facility, and will not place housing within a
100-year flood hazard area, as mapped on a Federal Flood Hazard Boundary or Flood Insurance Rate map or
other flood hazard delineation map, which would impede or redirect flood flows. Impacts are considered less
than significant.
X 7. Will/may the construction of the facility involve a significant change in surface features (e.g. wetland fill, deforestation, or water
diversion)?
While the storm drain project will alter the existing drainage pattern of the site, it will not alter the course of a
stream or river in a manner which would result in substantial erosion or siltation on- or off-site. Areas of
severe erosion are generally in the area of the Tarapaca landslide and further downstream. The episodic and
active downslope movement of the Tarapaca landslide is forcing the flowline of the canyon to shift westerly,
causing increased erosion of the western walls of the canyon. The proposed project, which includes buttress
filling of the canyon and a new storm drain system will reduce the rate of erosion within the canyon, reduce the
flow of water and debris down through the canyon, and reduce the movement of the Tarapaca landslide. The
project will alleviate the flooding and siltation problem which has consistently blocked W.25th Street with
water, mud and debris after past storm events. As such, impacts are considered less than significant with
mitigation.
INITIAL STUDY ATTACHMENT-94
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
6
1. AESTHETICS. Would the project:
a) Have a substantial adverse effect on a scenic
vista?
Photo
simulations
X
The proposed project will not have a substantial adverse effect on a scenic vista since the new buttress fill will be located
at the bottom of the canyon floor, will not be readily visible by the public due to the topography and development
pattern of the area, and will be planted with new native vegetation. The proposed mitigation measures include
camouflaging the new storm drain outlet structure at the beach. Further, the inlet structure will be camouflaged to the
greatest extent possible while maintaining the integrity of the new design. As a result, aesthetic impacts are considered
less than significant with mitigation.
b) Substantially damage scenic resources, including,
but not limited to, trees, rock outcroppings or
historic buildings within a scenic highway?
Photo
simulations
X
The new buttress fill will be located at the bottom of the canyon floor, will not be visible to the public, and will be
planted with new native vegetation. The proposed project will not substantially damage scenic resources, including, but
not limited to, trees, rock outcroppings or historic buildings within a scenic highway. The proposed mitigation includes
camouflaging the new storm drain outlet structure at the beach. Further, the inlet structure will be camouflaged to the
greatest extent possible while maintaining the integrity of the new design. As such, aesthetic impacts are considered
less than significant with mitigation.
c) Substantially degrade the existing visual character
or quality of the site and its surroundings?
Photo
simulations
X
The proposed project will not substantially degrade the existing visual character or quality of the site and its
surroundings. The new buttress fill will not be readily visible by the public, and will be planted with new native
vegetation. The proposed mitigation measures include camouflaging the new storm drain outlet structure at the beach.
Further, the inlet structure will be camouflaged to the greatest extent possible while maintaining the integrity of the new
design. As such, aesthetic impacts are considered less than significant with mitigation.
d) Create a new source of substantial light or glare,
which would adversely affect day or nighttime
views in the area?
X
The proposed project includes a new underground storm drain facility, which will not create a new source of light or
glare, which would adversely affect day or nighttime views of the area. No light or glare impacts will occur.
INITIAL STUDY ATTACHMENT-95
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
7
2. AGRICULTURE AND FORESTRY RESOURCES. Would the project:
a) Convert Prime, Unique or Statewide Importance
Farmland to non-agricultural use?
Calif. Ag.
Land
Evaluation
X
Based on review of the City’s General Plan and California Agricultural Land Evaluation criteria, the project area is not
located in, nor is adjacent to, designated agricultural land. The proposed project will not convert prime, unique or
statewide importance farmland to non-agricultural use. Thus, no impacts to prime farmland will occur.
b) Conflict with existing zoning for agricultural use
or a Williamson Act contract?
Calif. Ag.
Land
Evaluation
X
Based on review of the City’s General Plan and California Agricultural Land Evaluation criteria, the project area is not
located in, nor is adjacent to, designated agricultural land or a Williamson Act contract. Thus, no impacts are
anticipated.
c) Conflict with existing zoning for, or cause
rezoning of, forest land (as defined in Public
Resources Code section 12220(g)), timberland (as
defined by Public Resources Code section 4526),
or timberland zoned Timberland Production (as
defined by Government Code section 51101(g))?
Calif. Ag.
Land
Evaluation
X
Based on review of the City’s General Plan and California Agricultural Land Evaluation criteria, the project area is not
located in, nor is adjacent to, designated timberland or zone for Timberland Production. The project will not conflict
with existing zoning, nor cause the rezoning of forest land, timberland or Timberland Production. Thus, no impacts will
occur to agriculture and forestry resources.
d) Result in the loss of forest land or conversion of
forest land to non-forest use?
Calif. Ag.
Land
Evaluation
X
Based on review of the City’s General Plan and California Agricultural Land Evaluation criteria, the project area is not
located in, nor is adjacent to, designated forest land. The proposed project will not result in the loss of forest land or
conversion of forest land to non-forest use. Thus, no impacts are anticipated to agriculture and forestry resources.
INITIAL STUDY ATTACHMENT-96
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
8
e) Involve other changes in the existing environment
which, due to their location or nature, could result
in conversion of Farmland, to non-agricultural
use or conversion of forest land to non-forest us?
Calif. Ag.
Land
Evaluation
X
The proposed project is an underground storm drain and will not result in changes to the existing environment which
could result in conversion of farmland to non-agricultural use, or conversion of forest land to non-forest use. Thus, no
impacts are anticipated.
3. AIR QUALITY (Where available, the significance criteria established by the applicable air quality management or
air pollution control district may be relied upon to make the following determinations.) Would the project:
a) Violate any air quality standard or contribute to
an existing or projected air quality violation?
Air Resources
Control
Board
X
The proposed project includes a new storm drain facility, which will not violate any air quality standard or contribute to
an existing or projected air quality violation. Short term construction related dust will be mitigated by using
construction dust reduction measures. These measures include but are not limited to: maintaining construction
equipment in good working condition, avoiding construction equipment idling and utilizing low-sulfur burning fuels.
b) Expose sensitive receptors to substantial pollutant
concentrations?
Air Resources
Control
Board
X
The proposed project, after construction, is not anticipated to expose sensitive receptors to substantial pollutant
concentrations. Short term construction related dust will be mitigated by using construction dust reduction measures.
These measures include but are not limited to: maintaining construction equipment in good working condition, avoiding
construction equipment idling and utilizing low-sulfur burning fuels.
INITIAL STUDY ATTACHMENT-97
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
9
c) Result in a cumulatively considerable net increase
of any criteria pollutant for which the project
region is non-attainment under an applicable
federal or state ambient air quality standard
(including releasing emissions which exceed
quantitative thresholds for ozone precursors)?
Air Resources
Control
Board
X
While the proposed project is within a non-attainment area for ozone, carbon monoxide, nitrogen dioxide, total
suspended particulate, PM 2.5 and lead, the proposed storm drain project is not anticipated to result in a cumulatively
considerable net increase under an applicable federal or state ambient air quality standard (including releasing
emissions which exceed quantitative thresholds for ozone precursors), Because short term construction related dust will
be mitigated by using construction dust reduction measures. These measures include but are not limited to: maintaining
construction equipment in good working condition, avoiding construction equipment idling and utilizing low-sulfur
burning fuels.
d) Create objectionable odors affecting a substantial
number of people?
Air Resources
Control
Board
X
The proposed storm drain project, after construction, is not anticipated to create objectionable odors affecting a
substantial number of people. Short term construction related odors may result from construction vehicles, by the
construction site is not immediately adjacent to a sensitive receptor. As such, less than significant impacts are
anticipated.
e) Conflict with or obstruct the implementation of
any applicable air quality plan.
Air Resources
Control
Board
X
The proposed storm drain project is not anticipated to conflict with or obstruct the implementation of any applicable air
quality plans. The project will result in a gravity-flow storm drain system, and will not result in a use that can impact
air quality. As such, there will be no impacts associated with the storm drain system.
INITIAL STUDY ATTACHMENT-98
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
10
4. BIOLOGICAL RESOURCES. Would the project:
a) Have a substantial adverse effect, either directly
or through habitat modifications, on any species
identified as a candidate, sensitive or special
status species in local or regional plans, policies,
regulations, or by the California Department of
Fish and Game or U.S. Fish and Wildlife
Service?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
Approximately 0.34 acres of Coastal Sage Scrub (CSS) may be permanently impacted due to construction of this
project. The resulting impacts from construction of the outlet structure at the bluff would include approximately 0.02
acres of Southern coastal bluff scrub. The City NCCP identifies the lower San Ramon Canyon repair as an approved
project with an allowable impact area maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland
habitat. Based on the biological report prepared for this project, the 0.34 acres of CSS habitat. 0.02 acres of coastal
bluff scrub, and 1.36 acres of grassland habitat will not exceed the allowable maximum for the NCCP approved project.
Application of the NCCP allowable acreages will become the necessary mitigation for this impact.
Site specific California gnatcatcher protocol surveys were conducted during the 2011 breeding season as part of the
NEPA/CEQA document. No gnatcatchers were found; therefore no further gnatcatcher surveys are required.
b) Have a substantial adverse effect on any riparian
habitat or other sensitive natural community
identified in local or regional plans, policies,
regulations or by the California Department of
Fish and Game or U.S. Fish and Wildlife
Service?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
Based on the biological report and the wetlands delineation, the jurisdictional drainage of San Ramon Canyon does not
support any wetlands or riparian habitat. However, the project will impact approximately 0.07 acres of jurisdictional
drainage. Impacts from the canyon and jurisdictional fill will be mitigated by post-construction re-vegetation of the new
streambed at a 3:1 ratio or a total of 0.21 acres through an ACOE 404 permit. The Landscape Establishment
Conformance Mitigation Plan details are included in Section 3.0 of the MND. Impacts are considered less than
significant with mitigation incorporated.
INITIAL STUDY ATTACHMENT-99
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
11
c) Have a substantial adverse effect on federally
protected wetlands as defined by Section 404 of
the Clean Water Act (including, but not limited
to, marsh, vernal pool, coastal, etc.) through
direct removal, filling, hydrological interruption
or other means?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
Based on the biological report and the wetlands delineation, the jurisdictional drainage of San Ramon Canyon does not
support any wetlands or riparian habitat. However, the project will impact approximately 0.07 acres of jurisdictional
drainage. As a result, the project will be required to obtain the necessary permits for the jurisdictional drainage as
outlined in the biological report. Further, impacts from the canyon and jurisdictional fill will be mitigated by post-
construction with re-vegetation of the new streambed at a 3:1 ratio or a total of 0.21 acres. The Landscape
Establishment Conformance Mitigation Plan details are included in Section 3.0 of the MND. Based on the biological
report, the Citywide NCCP and mitigation plan will mitigate impacts to less than significant levels.
d) Interfere substantially with the movement of any
native resident or migratory fish or wildlife
species or with established native resident or
migratory wildlife corridors or impede the use of
native wildlife nursery sites?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
Based on the biological report, the canyon is part of a fragmented natural area and does not provide significant habitat
value due to the velocities associated with each flood event. Because of this flood “flushing” effect, the canyon is
basically environmentally “sterile”. The biological report did not find suitable raptor nesting habitat in the project
area.
The Phase 2 Restoration Plan of the Montrose Settlements Restoration Program (MSRP) identifies three potential
restoration sites in the ocean near the vicinity of the project site. Part of the goal of the restoration plan is to build
artificial reef modules for restoration of natural resources, including marine birds, fish and the habitats upon which they
depend. The closest restoration site identified would be located approximately 1 mile off the coast where the storm drain
outlet is proposed. Although the storm drain system could carry sediment during storm events that would directly outlet
to the ocean, it is not anticipated that sediment could be carried out 1 mile to the potential restoration site.
Therefore, the proposed project will not interfere with the movement of any native resident, migratory fish or wildlife
species, or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery
sites. As such, impacts are considered less than significant.
INITIAL STUDY ATTACHMENT-100
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
12
e) Conflict with any local policies or ordinances
protecting biological resources, such as a tree
preservation policy or ordinance?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
The proposed project is consistent with local policies and ordinances protecting biological resources. The City’s NCCP
identifies the lower San Ramon Canyon repair as an approved project with an allowable impact area maximum of 2.0
acres of CSS habitat, and 6.0 acres of non-native grassland habitat. Based on the biological report prepared for this
project there will be 0.34 acres of CSS habitat loss and 1.36 acres of grassland habitat loss. These losses are significantly
less than the allowable maximums for the NCCP approved project. As such, since the NCCP has already taken this
project into account, the impacts are considered less than significant with implementation of the NCCP criteria.
f) Conflict with the provisions of an adopted Habitat
Conservation Plan, Natural Community
Conservation Plan or other local, regional or state
habitat conservation plan?
Biological
Assessment,
Wetlands
Delineation,
gnatcatcher
survey, City
NCCP
X
The City NCCP identifies the lower San Ramon Canyon repair as an approved project with an allowable impact area
maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland habitat. Based on the biological report
prepared for this project, the 0.34 acres of CSS habitat and 1.36 acres of grassland habitat, does not exceed the
allowable maximum from the NCCP approved project. These losses are significantly less than the allowable maximums
for the NCCP approved project. As such, since the NCCP has already taken this project into account, the impacts are
considered less than significant with implementation of the NCCP criteria.
5. CULTURAL RESOURCES. Would the project:
a) Cause a substantial adverse change in the
significance of a historical resource as defined in
Section 15064.5 of the State CEQA Guidelines?
Cultural
Resource
Survey
X
The proposed project will not cause substantial adverse change in any significance of a historical resource defined in
Section 15064.5 of CEQA. Because of the flood “flushing” effect, the canyon is basically sterile of cultural resources.
The cultural resource survey conducted over the project area and construction access roads concluded that no cultural
resources are located in the project area and additional mitigation is not required. Impacts are considered less than
significant.
INITIAL STUDY ATTACHMENT-101
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
13
b) Cause a substantial adverse change in the
significance of an archaeological resource
pursuant to Section 15064.5 of the State CEQA
Guidelines?
Cultural
Resource
Survey
X
The proposed project will not cause substantial adverse change in any significance of an archaeological resource defined
in Section 15064.5 of CEQA. Because of the flood “flushing” effect, the canyon is basically sterile of cultural resources.
The cultural resource survey conducted over the project area and construction access roads concluded that no cultural
resources are located in the project area and additional mitigation is not required. Impacts are considered less than
significant.
c) Directly or indirectly destroy a unique
paleontological resource or site or unique
geologic feature?
Cultural
Resource
Survey
X
The tunneling operation will not destroy any unique paleontological resources or unique geologic features. The cultural
resource assessment did not identify or find paleontological resources in the project area. Impacts are considered less
than significant.
d) Disturb any human remains, including those
interred outside of formal cemeteries?
Cultural
Resource
Survey
X
The project will not disturb any human remains, including those interred outside of formal cemeteries. Because of the
flood “flushing” effect, the canyon is basically sterile of cultural resources. The cultural resource survey conducted over
the project area and construction access roads concluded that no cultural resources are located in the project area and
additional mitigation is not required. Further, the presence of cultural resources is extremely low because it is unlikely
that burial locations would have been sited in a streambed. Thus, impacts are considered less than significant.
However, it is important to note that Native American monitoring was recommended by at least 2 tribes for the Los
Angeles coastal area. As such, Native American monitoring will be recommended as part of the MND mitigation.
INITIAL STUDY ATTACHMENT-102
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
14
6. GEOLOGY-SOILS-SEISMICITY. Would the project:
a) Expose people or structures to potential
substantial adverse effects, including the risk of
loss, injury or death involving:
i) Rupture of a known earthquake fault, as
delineated on the most recent Alquist-Priolo
Earthquake Fault Zoning Map issued by the
State Geologist for the area or based on other
substantial evidence of a known fault?
Geotechnical
Report
X
The site is not located within an Alquist-Priolo Earthquake Fault Zone. In addition, there are no known active faults
that pass directly through the site. The nearest known active fault is the Palos Verdes fault, located approx. 3.3. miles
from the site. The Newport-Inglewood fault is located approx. 9.7 miles from the site. Given the proximity of the site to
these and numerous other active and potentially active faults, the site would be subject to earthquake ground motions.
Therefore, the project mitigation will require consistency with Public Resources Code Section 2693(c). Environmental
impacts will be less than significant.
ii) Strong seismic ground shaking? Geotechnical
Report
X
Strong seismic ground shaking may be anticipated due to the Palos Verdes and Newport-Inglewood faults, as well as
other numerous active and potentially active faults. Therefore, the project will require consistency with Public
Resources Code Section 2693(c). Impacts are considered less than significant.
iii) Seismic-related ground failure, including
liquefaction?
Geotechnical
Report
X
Given the depth to groundwater outlined in the geotechnical report, and the well-consolidated nature of the landslide
and bedrock materials on site, the potential for liquefaction and lateral spreading of these materials is low. However,
localized areas where the canyon is underlain by recent alluvium or colluvium may be subject to these seismic hazards
should these surficial soils be saturated at the time of the seismic event. Therefore, the project will require consistency
with Public Resources Code Section 2693(c). Environmental impacts are considered less than significant.
iv) Landslides? Geotechnical
Report
X
Given the site is predominately underlain by a large, dormant landslide, and the existing walls and slopes of San Ramon
Canyon are generally over-steepened due to erosion, the potential for further landsliding due to a large seismic event is
high. Buttress filling of the canyon and the proposed storm drain will reduce the rate of erosion within the canyon,
reduce the flow of water and debris down canyon, and reduce the movement of the Tarapaca landslide.
INITIAL STUDY ATTACHMENT-103
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
15
b) Result in substantial soil erosion or loss of
topsoil?
Geotechnical
Report
X
Erosion within San Ramon Canyon ranges from moderate to severe. Areas of severe erosion are generally in the area of
the Tarapaca landslide and downstream. The episodic and active downslope movement of the Tarapaca landslide is
forcing the flowline of the canyon to shift westerly, causing increased erosion of the western walls of the canyon. These
areas are directly downslope of the switchbacks of PVDE, in particular, the lower switchback. Based on the geotechnical
report, it appears that the canyon walls are eroding at an average rate of about 5 feet per year. Continued annual
erosion of these areas may cause stability issues with the PVDE roadway. Moderate to severe erosion of the canyon
walls and floor due to heavy flow of surface water and flash flooding during rains has caused deep cutting of the canyon,
in some areas generating vertical cuts up to 30 feet in height. Instability of these cuts is triggering surficial failures and
toppling of the vertical walls. Buttress filling of the canyon in addition to the proposed storm drain that will divert
water flow away from the canyon will reduce the rate of erosion within the canyon, reduce the flow of water and debris
down canyon, and reduce the movement of the Tarapaca landslide. The buttress filling is part of the proposed storm
drain project and is not considered mitigation. As such, the impacts are considered less than significant.
c) Be located on a geologic unit or soil that is
unstable, or that would become unstable as a
result of the project, and potentially result in on-
or off-site landslide, lateral spreading,
subsidence, liquefaction or collapse?
Geotechnical
Report
X
As discussed in b) above, San Ramon Canyon is subject to severe erosion due to flash flooding episodes and continued
westerly movement of the Tarapaca Landslide. Buttress filling of the canyon and the proposed storm drain will reduce
the rate of erosion within the canyon, reduce the flow of water and debris down canyon, and reduce the movement of the
Tarapaca landslide. The storm drain and buttress fill is part of the overall project, and not considered mitigation. As
such, landslide impacts are considered less than significant.
d) Be located on expansive soil, as defined by the
Uniform Building Code, thus creating substantial
risks to life or property?
Geotechnical
Report
X
Much of the Palos Verdes Peninsula is underlain by soils characterized as expansive; however, based on the geotechnical
report, the proposed project is anticipated to have no such impact.
e) Have soils incapable of adequately supporting the
use of septic tanks or alternative wastewater
disposal systems where sewers are not available
for the disposal of waste water?
Geotechnical
Report
X
The proposed project includes construction of a new storm drain, and does not involve a use that includes or requires
said types of disposal systems. Based on the geotechnical report, the proposed project is anticipated to have no such
impact on the use of septic tanks or wastewater disposal.
INITIAL STUDY ATTACHMENT-104
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
16
7. GREENHOUSE GAS EMISSIONS. Would the project:
a) Generate greenhouse gas emissions, either
directly or indirectly, that may have a significant
impact on the environment?
Calif. State
Office of
Planning and
Research
GHG issues
X
The proposed storm drain project will create certain GHG’s during construction of the facility primarily from
construction equipment. After construction, the project will not create GHG’s since the proposed project includes
construction of a new gravity-flow storm drain facility. Thus, it is small and short term with regards to the scale of
projects that create significant GHG’s. As a result, the proposed storm drain project is not anticipated to generate
greenhouse gas emissions either directly or indirectly. Therefore, the impacts are considered less than significant.
b) Conflict with an applicable plan, policy or
regulation adopted for the purpose of reducing the
emissions of greenhouse gases?
Calif. State
Office of
Planning and
Research
GHG issues
X
The proposed storm drain project is short term and small with regards to the scale of projects that create significant
GHG’s. Currently, there are no adopted plans, policies or regulations for the purpose of reducing GHG emissions.
However, the South Coast Air Quality Management District (SCQAMD) has published a “Draft Guidance Document –
Interim CEQA Greenhouse Gas (GHG) Significance Threshold”. The proposed storm drain project does not trigger
any of the draft significance thresholds. Thus, the project will not conflict with applicable plans, policies or regulations
adopted for the purpose of reducing the emissions of greenhouse gases. As such, the impacts are considered less than
significant.
8. HAZARDS AND HAZARDOUS MATERIALS. Would the project:
a) Create a significant hazard to the public or the
environment through the routine transport, use or
disposal of hazardous materials?
Hazardous
Materials
Database
X
The proposed project includes construction of a new storm drain, and would not generate any hazardous materials and
no transport of hazardous materials is anticipated. As a result, the proposed project is not anticipated to create a
significant hazard to the public or the environment through the routine transport, use or disposal of hazardous
materials.
INITIAL STUDY ATTACHMENT-105
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
17
b) Create a significant hazard to the public or the
environment through reasonably foreseeable
upset and accident conditions involving the
release of hazardous materials into the
environment?
Hazardous
Materials
Database
X
The proposed project includes construction of a new storm drain, and would not generate any hazardous material. As a
result, it is not anticipated to create a significant hazard to the public or the environment through reasonably foreseeable
upset and accident conditions involving the release or hazardous material in to the environment.
c) Emit hazardous emissions or handle hazardous or
acutely hazardous materials, substances or waste
within one-quarter mile of an existing or
proposed school?
Hazardous
Materials
Database
X
The proposed project includes construction of a new storm drain facility, and would not generate or emit any hazardous
materials. As a result, it is not anticipated to emit hazardous emissions or handle hazardous or acutely hazardous
materials, substances or waste within one-quarter mile of an existing or proposed school.
d) Be located on a site which is included on a list of
hazardous materials sites compiled pursuant to
Government Code Section 65962.5 and, as a
result, would create a significant hazard to the
public or the environment?
Hazardous
Materials
Database
X
The project site is not listed as a hazardous material site pursuant to Government Code Section 65962.5. No impacts are
anticipated as a result of the project.
e) For a project within an airport land use plan or,
where such a plan has not been adopted, within 2
miles of a public airport, would the project result
in a safety hazard for people residing or working
in the project area?
X
The proposed project is not located within an airport land use plan or, where such a plan has not been adopted, within 2
miles of a public airport. Therefore, the project would not result in a safety hazard for people residing or working in the
project area.
f) For a project within the vicinity of a private
airstrip, would the project result in a safety hazard for
people residing or working in the project area.
X
INITIAL STUDY ATTACHMENT-106
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
18
The proposed project is not located within the vicinity of a private airstrip. Thus the proposed project will not result in
a safety hazard for people residing or working in the project area.
g) Impair implementation of, or physically interfere
with, an adopted emergency response plan or
emergency evacuation plan.
X
The proposed project is not anticipated to impair implementation of, or physically interfere with, an adopted emergency
response plan or emergency evacuation plan. The project will alleviate the flooding problem which has blocked W.25th
Street with water, mud and debris after past storm events.
h) Expose people or structures to a significant risk
of loss, injury or death involving wildland fires,
including where wildlands are adjacent to
urbanized areas or where residences are
intermixed with wildlands?
County of Los
Angeles, Fire
Department,
Incorporated
Fire Hazard
Severity Zone
Map, City
Rancho Palos
Verdes, Tile 3
X
The project site is designated a “High Fire Hazard” area by the California Department of Forestry and Fire Protection
(CAL FIRE) and the County of Los Angeles Fire Department. Wildfires on the Palos Verdes Peninsula are associated
with large tracts of open spaces, including those interspersed with developed areas like the project site. The proposed
project includes a new storm drain system, and would not place homes, businesses, or residents within a fire hazard area
and does not include a type of use that would increase the potential for wildland fire at the project site. As such, the
impacts are considered less than significant.
INITIAL STUDY ATTACHMENT-107
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
19
9. HYDROLOGY AND WATER QUALITY. Would the project:
a) Violate any water quality standards or waste
discharge requirements?
Hydrology
and
Hydraulics
Study
X
Under the Los Angeles County existing MS4 Permit, the City of Rancho Palos Verdes will require compliance with the
NPDES for excavation, trenching, and dewatering adjacent to the ocean. A Storm Water Pollution Prevention Plan
(SWPPP) may be prepared, as warranted, to address construction storm water runoff. The SWPPP may be
incorporated into the City’s Water Quality Management Plan. All construction activity will be required to comply with
construction site runoff control minimum control measures, as outlined by the LARWQCB.
The proposed storm drain system will result in less soil erosion in the canyon, which will reduce the amount of sediment
discharged to the ocean. As such, the project would improve the quality of water discharged into the ocean.
All spills, leaks or other losses of oils and other hazardous or toxic materials will be immediately cleaned up. Under no
circumstances is any hazardous or toxic material to be allowed in or near the maintained drainage channel.
Impacts are considered less than significant with this mitigation incorporated.
b) Substantially deplete groundwater supplies or
interfere substantially with groundwater recharge
such that there would be a net deficit in aquifer
volume or a lowering of the local groundwater
table level?
Hydrology
and
Hydraulics
Study
X
Based on the geotechnical report, in general, groundwater was not observed during the investigation. One geotechnical
boring encountered seepage or a perched zone of groundwater at 103-feet of depth. The storm drain and buttressing
project will not substantially deplete groundwater supplies. As such, the proposed storm drain project is anticipated to
have no such impact.
INITIAL STUDY ATTACHMENT-108
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
20
c) Substantially alter the existing drainage pattern of
the site or area, including through the alteration of
the course of a stream or river, in a manner which
would result in substantial erosion or siltation on-
or off-site?
Hydrology
and
Hydraulics
Study
X
While the storm drain project will alter the existing drainage pattern of the site, it will not alter the course of a stream or
river in a manner which would result in substantial erosion or siltation on- or off-site. Areas of severe erosion are
generally in the area of the Tarapaca landslide and further downstream. The episodic and active downslope movement
of the Tarapaca landslide is forcing the flow line of the canyon to shift westerly, causing increased erosion of the western
walls of the canyon. The proposed project, which includes buttress filling of the canyon and a new storm drain system
will reduce the rate of erosion within the canyon, reduce the flow of water and debris down through the canyon, and
reduce the movement of the Tarapaca landslide. The project will alleviate the flooding and siltation problem which has
consistently blocked W.25th Street with water, mud and debris after past storm events. As such, impacts are considered
less than significant.
d) Substantially alter the existing drainage pattern of
the site or area, including through the alteration of
the course of a stream or river, or substantially
increase the rate or amount of surface runoff in a
manner which would result in flooding on- or off-
site?
Hydrology
and
Hydraulics
Study
X
While the project will alter the existing drainage pattern of the site, it will not alter the course of a stream or river in a
manner which would result in substantial flooding on- or off-site. Construction of the storm drain project is intended to
help alleviate flooding and erosion of San Ramon Canyon, and alleviate the flooding and siltation problem that has
consistently blocked W.25th Street with water, mud and debris after past storm events. As such, impacts are considered
less than significant.
e) Create or contribute runoff water which would
exceed the capacity of existing or planned
stormwater drainage systems or provide
substantial additional sources of polluted runoff?
Hydrology
and
Hydraulics
Study
X
The existing storm drain system currently does not meet the flow capacity needs during a storm event, which results in
flooding and erosion of San Ramon Canyon and W. 25th Street. Therefore, the new storm drain will greatly improve the
storm flow capacity, and will minimize flooding and road closures. Thus, impacts are considered less than significant.
f) Otherwise substantially degrade water quality. Hydrology
and
Hydraulics
Study
X
INITIAL STUDY ATTACHMENT-109
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
21
The San Ramon Canyon storm drain project will not otherwise substantially degrade nor alter water quality. The storm
drain is intended to serve a necessary drainage purpose to prevent potential degradation of topsoil, property damage,
and potentially avoid a hazard to public safety. It is anticipated that the quality of water entering the new storm drain
could be slightly improved since the project will reduce the amount of soil erosion in the canyon, which will reduce the
amount of sedimentary discharge into the ocean. Construction Best Management Practices will prevent construction
related erosion. Thus, impacts are considered less than significant.
g) Place housing within a 100-year flood hazard area,
as mapped on a Federal Flood Hazard Boundary
or Flood Insurance Rate map or other flood
hazard delineation map?
Hydrology
and
Hydraulics
Study
X
The proposed project includes construction of a new storm drain facility, and will not place housing within a 100-year
flood hazard area, as mapped on a Federal Flood Hazard Boundary or Flood Insurance Rate map or other flood hazard
delineation map which would impede or redirect flood flows. Impacts are considered less than significant.
h) Place within a 100-year flood hazard area,
structures which would impede or redirect flood
flows?
Hydrology
and
Hydraulics
Study
X
The project includes construction of a new storm drain facility, and will not place within a 100-year flood hazard area,
structures which would impede or redirect flood flows. The new storm drain pipe will help to direct the storm flows in a
controlled manner. Therefore, impacts are considered less than significant.
i) Expose people or structures to a significant risk
of loss, injury or death involving flooding,
including flooding as a result of the failure of a
levee or dam?
Hydrology
and
Hydraulics
Study
X
The project will not expose people or structures to a significant risk of loss, injury or death involving flooding, including
flooding as a result of the failure of a levee or dam. Construction of the storm drain project does not include a levee or
dam, nor is it in the vicinity of a levee or dam. The proposed storm drain project will alleviate the flooding of San
Ramon Canyon and alleviate the flooding and siltation problem that consistently has blocked W.25th Street with water,
mud and debris after past storm events. As a result, the project will benefit the area. Therefore, less than significant
impacts are anticipated.
j) Expose people or property to inundation by
seiche, tsunami, or mudflow?
Hydrology
and
Hydraulics
Study
X
INITIAL STUDY ATTACHMENT-110
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
22
Based on review of the Torrance/San Pedro Quadrangle to the Tsunami Inundation Map for Emergency Planning
prepared by the California Geological Survey (CGS, 2009) (contained in the geotechnical report), the area at the toe of
the bluff within the project site may be susceptible to Tsunami inundation. No mitigation is proposed for this potential
impact. Further, the proposed project will address the current mudflow problem that results after storm events.
Therefore, impacts are considered less than significant.
k) Have construction impact on storm water runoff? Hydrology
and
Hydraulics
Study
X
BMP’s during construction will be required as part of the NPDES permit for the City. The tunnel outlet at the beach
during construction will be required to be fully lined and bordered with sandbags so that absolutely no debris or
construction water of any kind is allowed to the ocean. There will be stiff penalties imposed upon the contractor for any
accidental violation. The tunneling operations will be required to use conveyors or other means other than hydraulic
slurry pumping to convey the spoils so as to prevent a potential spill onto to the beach.
l) Have post construction activity impact on storm
water runoff?
Hydrology
and
Hydraulics
Study
X
The proposed project will not have post construction activity impact on storm water runoff. The new storm drain will
help alleviate flooding.
10. LAND USE AND PLANNING. Would the project:
a) Conflict with any applicable land use plan, policy
or regulation of an agency with jurisdiction over
the project (including, but not limited to a general
plan, specific plan, local coastal program or
zoning ordinance) adopted for the purpose of
avoiding or mitigating environmental effects?
City Wide
NCCP and
General Plan
X
The proposed project is not anticipated to conflict with any applicable land use plan, policy or regulation of an agency
with jurisdiction over the project including, but not limited to a general plan, specific plan, local coastal program or
zoning ordinance. The City’s NCCP identifies the lower San Ramon Canyon repair as an approved project with an
allowable impact area maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland habitat. Based on the
biological report prepared for this project, the 0.34 acres of CSS habitat and 1.36 acres of grassland habitat, is well
below the allowable maximum from the NCCP approved project. Therefore, the project is consistent with the City’s
NCCP, and the impacts are considered less than significant for land use impacts since the NCCP mitigation is applicable
in the biological section of this document.
INITIAL STUDY ATTACHMENT-111
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
23
b) Conflict with applicable environmental plans or
policies adopted by agencies with jurisdiction
over the project?
City Wide
NCCP and
General Plan
X
The proposed project is not anticipated to conflict with applicable environmental plans or policies adopted by agencies
with jurisdiction over the project. The City’s NCCP identifies the lower San Ramon Canyon repair as an approved
project with an allowable impact area maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland
habitat. Based on the biological report prepared for this project, the 0.34 acres of CSS habitat and 1.36 acres of
grassland habitat, does not exceed the allowable maximum from the NCCP approved project. Therefore, the project is
consistent with the City’s NCCP, and the impacts are considered less than significant for land use impacts since the
NCCP mitigation is applicable in the biological section of this document.
c) Be incompatible with existing land use in the
vicinity?
City Wide
NCCP and
General Plan
X
The proposed project is not anticipated to be incompatible with existing land use in the vicinity. The project includes a
subterranean drainage and piping that will not be readily visible by the public; fill material at the canyon floor will be
hydroseeded which will result in native foliage that will screen the area so that it is not apparent; and the outlet
structure will contain natural elements to blend the structure into the landscape. As such, the impacts are considered
less than significant.
d) Conflict with any applicable habitat conservation
plan or natural community conservation plan?
City Wide
NCCP and
General Plan
X
The proposed project is not anticipated to conflict with any applicable habitat conservation plan or natural community
conservation plan. The City NCCP identifies the lower San Ramon Canyon repair as an approved project with an
allowable impact area maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland habitat. Based on the
biological report prepared for this project, the 0.34 acres of CSS habitat and 1.36 acres of grassland habitat, does not
exceed the allowable maximum from the NCCP approved project. Therefore, the project is consistent with the City’s
NCCP, and the impacts are considered less than significant for land use impacts since the NCCP mitigation is applicable
in the biological section of this document.
e) Disrupt or divide the physical arrangement of an
established community (including a low-income or
minority community)?
City Wide
NCCP and
General Plan
X
The proposed project is occurring in a canyon and includes a subterranean storm drain facility. Thus, Due to the
project’s scope and location, the Project would not physically divide an established community and will not be
conducted within a residential neighborhood. As such, the project will have no such impact.
INITIAL STUDY ATTACHMENT-112
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
24
11. ENERGY AND MINERAL RESOURCES. Would the project:
a) Conflict with adopted energy conservation plans. X
The proposed project is a new gravity-flow storm drain facility that does not require the use of electricity or other form
of energy to operate. As such, the project will not conflict with any energy conservation plans and will have no impact.
b) Use non-renewable resources in a wasteful and
inefficient manner.
x
The proposed project includes a new storm drain facility that will not use non-renewable resources. As such, the
proposed project will have no such impact.
c) Result in the loss of availability of a known
mineral resource that would be of value to the
region and the residents of the state?
X
The project site is not known to contain mineral resources of value to the region and/or state residences. As such, there
will be no environmental impacts resulting from the proposed project with respect to mineral resource issues.
d) Result in the loss of availability of a locally-
important mineral resource recovery site
delineated on a local general plan, specific plan or
other land use plan?
X
No land use plan delineates the site as a locally important mineral resource recovery site. As such, the proposed project
is anticipated to have no such impact.
12. NOISE. Would the project result in:
a) Exposure of persons to or generation of noise
levels in excess of standards established in the
local general plan or noise ordinance, or
applicable standards of other agencies?
City General
Plan
X
After construction, the project will not expose persons to or generate noise levels in excess of standards established in the
local general plan or noise ordinance, or applicable standards of other agencies.
Short-term construction-related noise will be generated during construction. Sources of noise during construction
include truck road-noise, backup alarming and motorized construction equipment. Construction duration of 4 to 6
months weeks will require noise mitigation. The noise impacts during construction can be mitigated to less than
significant levels by limiting hours of construction, maintaining construction equipment in good working order, and
prohibiting certain construction related activities such as rock crushing.
INITIAL STUDY ATTACHMENT-113
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
25
b) Exposure of persons to or generation of excessive
groundborne vibration or groundborne noise
levels?
City General
Plan
X
After construction, the project will not expose persons to or generate excessive ground-borne vibration or ground-borne
noise levels. The proposed project may create short-term construction vibration. These impacts are considered to be
less than significant to the adjacent residents.
Tunneling activity may trigger canyon wall and landslide failure during construction. No impacts to downstream
residents are anticipated. Construction worker risk will be minimized by implementation of construction safety
specifications.
c) A substantial permanent increase in ambient
noise levels in the project vicinity above levels
existing without the project?
City General
Plan
X
The project includes a new storm drain system, and does not include a use that will generate noise. The long-term noise
levels which may occur during maintenance of the storm drain facility will not be excessive. Therefore, impacts are
considered less than significant.
d) A substantial temporary or periodic increase in
ambient noise levels in the project vicinity above
levels existing without the project?
City General
Plan
X
After construction, the project will not create a substantial temporary or periodic increase in ambient noise levels in the
project vicinity above levels existing without the project.
Short-term construction-related noise will be generated during construction. Sources of noise during construction
include truck road-noise, backup alarming and motorized construction equipment. While the short-term noise levels
will not be excessive, the construction duration of 4 to 6 weeks will require noise mitigation. The noise impacts during
construction can be mitigated to less than significant levels by limiting hours of construction, maintaining construction
equipment in good working order, and prohibiting certain construction related activities such as rock crushing.
INITIAL STUDY ATTACHMENT-114
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
26
e) For a project located within an airport land use
plan or, where such a plan has been adopted,
within 2 miles of a public airport or a public use
airport, would the project expose people residing
or working in the project area to excessive noise
levels?
City General
Plan
X
The proposed project is not located within an airport land use plan or within 2 miles of a public airport. Thus, there is
no impact resulting from the storm drain project.
f) For a project within the vicinity of a private
airstrip, would the project expose people residing
or working in the project area to excessive noise
levels?
City General
Plan
X
The proposed project is not located within the vicinity of a private airstrip. Thus the proposed project will not result in
a safety hazard for people residing or working in the project area, and will have no such impact.
13. POPULATION AND HOUSING. Would the project:
a) Cumulatively exceed official regional or local
population projects?
X
The proposed project includes a new storm drain facility to address flooding, and is not a residential development
project. Thus, the project is not anticipated to cumulatively exceed official regional or local population projects.
b) Induce substantial growth in an area, either
directly or indirectly (for example, through
projects in an undeveloped area of major
infrastructure)?
X
The proposed project includes a new storm drain facility to address flooding. The project will not induce substantial
growth either directly or indirectly, and does not accommodate new development; rather, the project
remedies an existing drainage problem. As such, there will be no impacts associated with the project.
INITIAL STUDY ATTACHMENT-115
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
27
c) Displace substantial numbers of existing housing,
especially affordable housing, necessitating the
construction of replacement housing elsewhere?
X
The proposed project includes a new storm drain facility to address flooding and does not require displacement of any
residences. As such, there is no impact.
d) Displace substantial numbers of people,
necessitating the construction of replacement
housing elsewhere?
X
The proposed project includes a new storm drain facility and will not displace any person, nor necessitate the
construction of replacement housing elsewhere.
14. PUBLIC SERVICES. Would the project:
a) Would the project result in substantial adverse
physical impacts associated with the provision of
new or physically altered governmental facilities,
need for new or physically altered governmental
facilities, the construction of which could cause
significant environmental impacts, in order to
maintain acceptable service ratios, response times
or other performance objectives for any of the
public services:
i) Fire protection? X
The proposed project includes a new storm drain facility to address flooding of San Ramon Canyon and W. 25th Street.
As a result, neither the project nor the resulting use will require additional fire protection service. Thus, the proposed
project will have no impact on fire protection.
ii) Police protection? X
The proposed project includes a new storm drain facility to address flooding of San Ramon Canyon and W. 25th Street.
As a result, neither the project nor the resulting use will require additional police protection service. Thus, the proposed
project will have no impact on police protection.
iii) Schools? X
The proposed project does not result in an increase in the student population. As such, the project will have no such
impact on schools.
INITIAL STUDY ATTACHMENT-116
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
28
iv) Parks? X
The proposed project does not generate additional population that would utilize park facilities. As such, the project will
have no such impact.
v) Other public facilities? X
The proposed project is anticipated to have no such impact on other public facilities in the City.
15. RECREATION. Would the project:
a) Would the project increase the use of existing
neighborhood and regional parks or other
recreational facilities such that substantial
physical deterioration of the facility would occur
or be accelerated?
X
A new trail is proposed along the southern portion of the project in the City’s Shoreline Park, seaward of PV Drive
South/W 25th Street, to minimize visual impacts after construction and facilitate pedestrian access to the coast. The
proposed project is not anticipated to increase the use of existing neighborhood and regional parks or other recreational
facilities such that substantial physical deterioration of the facility would occur or be accelerated. Impacts are therefore
less than significant on existing recreational facilities.
b) Does the project include recreational facilities or
require the construction or expansion of
recreational facilities which might have an
adverse physical effect on the environment?
X
A new trail is proposed along the southern portion of the project in the City’s Shoreline Park, seaward of PV Drive
South/ W 25th Street, to minimize visual impacts after construction and facilitate pedestrian access to the coast. Impacts
are therefore less than significant on existing recreational facilities.
16. TRANSPORTATION / TRAFFIC. Would the project:
a) Cause an increase in traffic which is substantial in
relation to the existing traffic load and capacity of
the street system?
City General
Plan
X
During construction, short-term related traffic impacts may result. Mitigation measures will be implemented which
limits the number of construction vehicles on the street at one time, traffic control measures, construction timing and
construction phasing to avoid peak hours. As a result of mitigation, the impacts will be less than significant.
INITIAL STUDY ATTACHMENT-117
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
29
b) Exceed, either individually or cumulatively, a
level of service standard established by the
county congestion management agency for
designated roads or highways?
City General
Plan
X
The proposed project is not anticipated to exceed, either individually or cumulatively, a level of service standard
established by the county congestion management agency for designated roads or highways.
c) Result in inadequate emergency access or
inadequate access to nearby uses?
City General
Plan
X
After construction, the proposed project is not anticipated to result in inadequate emergency access or inadequate access
to nearby uses. Consequently, the proposed storm drain will minimize the flooding that results in the closure of W. 25th
Street, which will ensure that the roadway remains open and emergency access is maintained along this major arterial.
During construction, short-term access impacts may result. Mitigation measures will be implemented which limits the
number of construction vehicles on the street at one time, traffic control measures, construction timing and construction
phasing to avoid peak hours.
d) Result in insufficient parking capacity on-site or
off-site?
City General
Plan
X
After construction there will be no long-term parking impacts. During construction, short-term related parking impacts
may result. Mitigation measures will be implemented which limits the number of construction vehicles on the street at
one time, traffic control measures, construction timing and construction phasing to avoid peak hours. As a result of
mitigation, the impacts will be less than significant.
e) Result in change in air traffic patterns, including
either an increase in traffic levels or a change in
location that results in substantial safety risks.
City General
Plan
X
The storm drain project will not result in change to air traffic patterns. No impacts are anticipated.
INITIAL STUDY ATTACHMENT-118
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
30
f) Conflict with adopted policies, plans or programs
supporting alternative transportation, including
mass transit and non-motorized travel and
relevant components of the circulation system
(e.g., bus turnouts, bicycle racks)?
City General
Plan
X
The proposed project includes a new storm drain facility, which does not increase demand for transportation. Thus, the
project will not conflict with adopted policies, plans or programs supporting alternative transportation (e.g., bus
turnouts, bicycle racks).
g) Substantially increase hazards due to a design
feature (e.g. sharp curve or dangerous
intersections) or incompatible uses (e.g. farm
equipment)?
City General
Plan
X
The proposed project will not result in the reconfiguration of any streets or highways, Thus, the proposed storm drain
project will not increase hazards due to a design feature (e.g. sharp curve or dangerous intersections) or incompatible
uses ( e.g. farm equipment).
17. UTILITIES AND SERVICE SYSTEMS. Would the project:
a) Exceed wastewater treatment requirements of the
applicable Regional Water Quality Control
Board?
X
The proposed project includes a new storm drain facility, which does not increase demand or exceed requirements for
wastewater treatment facilities. Thus, the project will not exceed wastewater treatment requirements of the Los Angeles
Regional Water Quality Control Board.
b) Require or result in the construction of new water
or wastewater treatment facilities or expansion of
existing facilities, the construction of which could
cause significant environmental effects?
X
The proposed project includes a new storm drain facility, which does not increase demand for new water or wastewater
treatment facilities or expansion of existing facilities.
INITIAL STUDY ATTACHMENT-119
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
31
c) Require or result in the construction of new storm
water drainage facilities or expansion of existing
facilities, the construction of which could cause
significant environmental effects?
X
The San Ramon Canyon storm drain project is intended to serve a necessary drainage purpose and to prevent potential
degradation of topsoil, property damage, and potentially avoid a hazard to public safety. The existing San Ramon
Canyon storm drain will remain in place act as an “over-flow” during significant storm events.
Construction of the new storm drain will have short-term environmental effects on traffic, air quality and noise that can
all be mitigated to less than significant levels. Long-term environmental effects on biological and cultural resources
after construction will be mitigated to less than significant levels. Other long-term environmental effects after
construction are considered a beneficial impact from the improvement of storm flows.
d) Have sufficient water supplies available to serve
the project from existing entitlements and
resources, or are new or expanded entitlements
needed?
X
The proposed storm drain project is anticipated to have no such impact on existing water supplies available to serve the
City.
e) Result in a determination by the wastewater
treatment provider which serves or may serve the
project that it has adequate capacity to serve the
project's projected demand in addition to the
provider's existing commitments?
X
The proposed storm drain project is not anticipated to result in a determination by the wastewater treatment provider
that is has adequate capacity to serve demand.
f) Be served by a landfill with sufficient permitted
capacity to accommodate the project's solid waste
disposal needs?
X
The project will generate additional waste from regular maintenance and cleaning of the catch basins. Based on
information from the City’s public works dept, the local landfills have sufficient disposal capacity. Therefore, the
proposed project is anticipated to have a less than significant impact on solid waste disposal.
g) Comply with federal, state and local statutes and
regulations related to solid waste?
X
The proposed storm drain project complies with all federal, state and local statutes related to solid waste.
INITIAL STUDY ATTACHMENT-120
Issues and Supporting Information
Sources
Source
Document
Potentially
Significant
Impact
Less than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact
SFC
Solutions for
Compliance
City of Rancho Palos Verdes
San Ramon Canyon Storm Drain
NEPA EA and CEQA IS
32
16. MANDATORY FINDINGS OF SIGNIFICANCE
a) Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or
wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or
animal community, reduce the number or restrict the range of a rare or endangered plant or animal or eliminate important
examples of the major periods of California history or prehistory?
With mitigation incorporated into the project description, construction of the storm drain will not substantially
reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels,
threaten to eliminate a plant or animal community, reduce the number or restrict the range of a rare or endangered
plant or animal or eliminate important examples of the major periods of California history or prehistory.
The City NCCP identifies the lower San Ramon Canyon repair as an approved project with an allowable impact area
maximum of 2.0 acres of CSS habitat, and 6.0 acres of non-native grassland habitat. Based on the biological report
prepared for this project, the 0.34 acres of CSS habitat loss and 1.36 acres of grassland habitat loss are significantly
below the allowable maximum from the NCCP approved project.
Construction of the inlet structure and canyon stabilization (buttress fill and terrace drains) will impact
approximately 0.07 acres of jurisdictional drainage because of the canyon’s connection to the ocean. This
jurisdictional drainage is not considered wetlands habitat. Post-construction re-vegetation of the streambed and
affected canyon slopes with native vegetation will be required at a 3:1 ratio (0.21 acres total). Re-vegetation activity
will include a plant palette, consistent with the Resource Agency and Native Plant Society criteria, that lists exact
species of plants to be restored and the native plants derived from local genetic sources be used.
The San Ramon Canyon storm drain project is intended to serve a necessary drainage purpose to prevent potential
degradation of topsoil, property damage, and potentially avoid a hazard to public safety. The project will not violate
any water quality standards.
b) Does the project have impacts that are individually limited, but cumulatively considerable? ("Cumulatively considerable"
means that the incremental effects of a project are considerable when viewed in connection with the effects of the past
projects, the effects of other current projects, and the effects of probable future projects.)
Based on the cumulative assessment prepared in Section 1.5 of the EA/MND and consistent with NEPA requirements
to review the effects of cumulative projects in the area, the proposed project will have no such cumulatively
considerable impact.
c) Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly
or indirectly?
The proposed project will have no such impact. The project will create a beneficial impact from the improvement.
INITIAL STUDY ATTACHMENT-121