City of Torrance - FY2019-021 MEMORANDUM OF AGREEMENT
TORRANCE AIRPORT STORM WATER INFILTRATION PROJECT
STAKEHOLDER GROUP
PRELIMINARY DESIGN WORK COST SHARING AGREEMENT
This Memorandum of Agreement ("MOA") is made, entered into, as of the date of
the last Party signature set forth ("Effective Date"), by and among the City of Torrance, a
municipal corporation ("Torrance"); the City of Palos Verdes Estates, a municipal
corporation ("Palos Verdes Estates"); the City of Rolling Hills, a municipal corporation
("Rolling Hills"), the City of Rolling Hills Estates, a municipal corporation ("Rolling Hills
Estates"); the City of Rancho Palos Verdes, a municipal corporation ("Rancho Palos
Verdes"); and the County of Los Angeles ( "County"), a political subdivision of the State
of California; (each, individually a "Party," and collectively, "Parties"), with respect to the
following:
RECITALS
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A. WHEREAS, the U.S. Environmental Protection Agency (USEPA) and the
California Regional Water Quality Control Board, Los Angeles Region (Regional Board)
have classified the Greater Los Angeles County Municipal Separate Storm Sewer
System Permit (MS4) as a large MS4 pursuant to 40 CFR section 122.26(b)(4) and a
major facility pursuant to 40 CFR section 122.2; and
B. WHEREAS, the Regional Board adopted National Pollutant Discharge p•
Elimination System Municipal Separate Storm Sewer System Permit Order No. R4-
2012-0175 as amended by State Water Board Order WQ 2015-0075 and Los Angeles
Water Board Order R4-2012-0175-A01 (MS4 Permit); and
C. WHEREAS, the MS4 Permit became effective on December 28, 2012, and
requires that the LACFCD, the COUNTY, and 84 of the 88 cities (excluding Avalon,
Long Beach, Palmdale, and Lancaster) within the County comply with the prescribed
elements of the MS4 Permit; and
D. WHEREAS, the Regional Water Quality Control Board, Los Angeles Region
adopted an amendment to the Water Quality Control Plan for the Los Angeles Region
incorporating a Total Maximum Daily Load ("TMDL") for Nutrients in Machado Lake, with
an effective date of March 11, 2009; and
E. WHEREAS, the Regional Water Quality Control Board, Los Angeles Region
adopted an amendment to the Water Quality Control Plan for the Los Angeles Region
incorporating a TMDL for Pesticides and PCBs in Machado Lake, with an effective date
of March 20, 2012; and
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F. WHEREAS, the proposed work will consist of preliminary design work
("Preliminary Design Work") of the Torrance Airport Storm Water Infiltration Project
("Project"). The Project proposes to divert the stormwater and urban runoff from the Los
Angeles County Flood Control District's ("LACFCD") Reinforced Concrete Box storm
drain BI 9827 U1, Line B into a pre-treatment system, temporary storage, and infiltration
system for groundwater recharge underneath the Torrance Airport; and
G. WHEREAS, the City of Torrance awarded a Consulting Services Agreement
("Contract") to a consultant ("Consultant") for the Preliminary Design Work for the Project
on February 6, 2018. The scope of work and budget have been defined in Exhibit A,
which is attached and incorporated by this reference; and
H. WHEREAS, Torrance is the main agency for the administration of the Contract on
behalf of all of the Parties; and
WHEREAS, the Parties desire to enter into this MOA voluntarily to, among other
things: 1) complete Preliminary Design Work of the Project to determine the feasibility
and associated costs of the Project, 2) set forth the Parties' intent to have the Contract
administered and coordinated by Torrance, 3) and establish a formula(s) to calculate the
respective financial share of the costs for each Party for future cost sharing agreements
for final design and/or construction of the Project; and
J. WHEREAS, the Parties agree to fund their pro-rata share for the Preliminary
Design in accordance with Exhibit B, which is attached and incorporated by this reference.
AGREEMENT
NOW, THEREFORE, in consideration of the mutual benefits and representations made
herein, the Parties hereby agree as follows:
1. Incorporation of Recitals —The recitals above are incorporated by reference and
hereby made a part of this MOA.
2. Information Sharing — The Parties agree to share, to the extent not otherwise
prohibited by law or by legal or trade secret privilege, all information required to develop,
prepare and submit documents required for the Preliminary Design Work and the Project,
including monitoring data, CADD and GIS or other electronic data. Such sharing shall be
subject to any applicable license agreements or other restrictions. All data shared among
the Parties shall be provided "as is" and without warranties as to accuracy or as to any
other characteristic, whether express or implied. The intent of this data-sharing provision
is to facilitate the Project. The Parties agree not to use such data for tasks not related to
the Project, unless required by law.
3. Funding Agreements—Any funds contributed for the Preliminary Design Work of
the Project, including contributions for consultants or other services as agreed upon by
the Parties, shall be per the cost-sharing formula described in Exhibit B, All funding shall
apply to the Project, and shall not be used for any activities not included in the Project.
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The total matching fund contribution by all of the Parties for the Preliminary Design Work
collectively shall not exceed $238,336 unless otherwise agreed to by the Parties by
written amendment of this MOA. Any cost to be invoiced above this sum will require an
amendment to this MOA. If for any reason-certain aspects of the Preliminary Design Work
or the Project are not implemented, the cost sharing formula shall be proportionately
adjusted to reduce the contribution of the Party or Parties that otherwise would have
contributed an amount in connection with the work that would have been completed. This
cost sharing adjustment to reduce the Party's or Parties' contribution may be done by
Torrance without an amendment to this MOA upon thirty (30) days written notice to the
Parties, and such notice must include the new adjusted cost-share amounts.
4. Contracting — The Parties agree that Torrance shall be the Party that contracts
with the Consultant for the Preliminary Design Work of the Project and shall be considered
the contracting agency. The Contract requires the Consultant to look solely to Torrance
for payment of the funds contributed by the Parties and look solely to Torrance to resolve
any issues with the Contract.
5. Supervision of Preliminary Design Consultant— Torrance shall be responsible
for coordinating the activities of the Consultant and its sub-contractors, in accordance
with applicable law. Torrance shall be responsible for ensuring adherence to the scope
of work in Exhibit A. Time is of the essence in this MOA. Torrance shall notify the other
Parties regarding all change orders, including any proposed cost and scope changes,
and shall offer the other Parties reasonable time to comment. Unless an increase in costs
for the Preliminary Design Work is approved by all effected Parties, no proposed change
in the cost of the Preliminary Design Work may be implemented by Torrance.
6. Payment— Upon the Effective Date of the MOA, Torrance shall invoice each Party
for its respective share of the costs of the Preliminary Design Work based on the cost
sharing formula described in Exhibit B. Each Party shall pay that invoice within 30 days
of receipt.
7. Term of MOA; Withdrawal — This MOA shall continue in effect until the
Preliminary Design Work of the Project is completed and all payments due to Consultant
under the Contract are made, unless earlier terminated or extended by written agreement
of all Parties. A Party may withdraw from this MOA ("Withdrawing Party") by sending
notice to each Party in accordance with the notice provision of this MOA stating that
Party's decision to withdraw from this MOA. However, prior to withdrawing, the
Withdrawing Party must be current on all financial obligations resulting from this MOA.
Once the Withdrawing Party withdraws from the MOA, it will no longer be a participant in
the Project. Further, the Withdrawing Party forfeits any funds contributed prior to
withdrawing, unless it is later determined that certain aspects of the Project were not
implemented and the Withdrawing Party's contribution should have been reduced
pursuant to Section 3 above, in which case the Withdrawing Party shall be entitled to a
reimbursement, which reimbursement must be paid by Torrance no later than 60 days
from the date of the final payment to the Consultant for the Preliminary Design Work.
Withdrawal is effective 60 days after the date of written notice to all the Parties.
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8. Entire Agreement — This MOA, including any other documents incorporated
herein by specific reference, represents the entire and integrated agreement between the
Parties and supersedes all prior negotiations, representations or agreements, either
written or oral.
9. Amendment — This MOA may be modified or amended, or provisions or breach
may be waived, only by subsequent written agreement signed by all Parties.
10. Authority — Each of the persons executing this MOA on behalf of each Party
represents and warrants that he or she has the authority to execute this MOA on behalf
of such Party and has the authority to bind the Party to the performance of its obligations
hereunder.
11. Counterparts - This MOA may be signed in counterparts, and each counterpart
shall be deemed an original, but all of which shall constitute one and the same instrument.
12. Indemnification — Each Party shall indemnify, defend, and hold harmless every
other Party, including its special districts, elected and appointed officers, employees,
agents, attorneys, and designated volunteers from and against any and all liability,
including, but not limited to demands, claims, actions, fees, costs, and expenses
(including reasonable attorney's and expert witness fees), arising from or connected with
the respective acts of that Party arising from or related to this MOA; provided, however,
that no Party shall indemnify another Party for that Party's own negligence or willful
misconduct. This provision shall survive termination of this MOA.
In light of the provisions of Section 895.2 of the Government Code of the State of
California imposing certain tort liability jointly upon public entities solely by reason of such
entities being parties to an agreement (as defined in Section 895 of said Code), each of
the Parties hereto, pursuant to the authorization contained in Government Code Sections
895.4 and 895.6, shall assume the full liability imposed upon it or any of its officers,
agents, or employees, by law for injury caused by any act or omission occurring in the
performance of this MOA to the same extent such liability would be imposed in the
absence of Section 895.2 of the Government Code. To achieve the above stated purpose,
each Party indemnifies, defends, and holds harmless every other Party for any liability,
cost, or expense that may be imposed upon such other Party solely by virtue of said
Section 895.2. The provisions of Section 2778 of the California Civil Code are made a
part hereof as if incorporated herein.
13. Insurance - The Parties are self-insured public entities for purposes of
Professional Liability, General Liability, and Worker's Compensation. The Parties warrant
that through their programs of self-insurance, they have adequate Professional Liability,
General Liability and Workers' Compensation to provide coverage for liabilities arising out
of the Parties' performance of this MOA.
14. Access to Los Angeles County Flood Control District Facilities — Any Party
intending to enter onto the Los Angeles County Flood Control District ("LACFCD") right
of way shall first apply for Flood permit from the County of Los Angeles Department of
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Public Works (Public Works) Land Development Division, Permit Section. Once such a
permit is obtained, the Party shall, among other permit provisions, contact the Public
Works Stormwater Maintenance Division at least 48 hours prior to entering the facility.
15. Notices — Any notices, bills, invoices, or reports relating to this MOA and any
request, demand, statement or other communication required or permitted hereunder
shall be in writing and shall be delivered to all of the representatives of the Parties (unless
the MOA provides for notice to a lesser number of the Parties) at the addresses set forth
on in Exhibit C attached hereto and incorporated herein by reference. A notice shall be
deemed to have been received on (a) the day of delivery, if delivered by hand during
regular business hours or by confirmed facsimile; or(b) on the third business day following
deposit in the United States mail, postage prepaid to the addresses set forth in Exhibit C.
16. Relationship of the Parties —The Parties are, and shall at all times remain as to
each other, wholly independent entities. No Party to this MOA shall have power to incur
any debt, obligation, or liability on behalf of any other Party or otherwise act on behalf of
any other Party as an agent except as expressly provided by this MOA. No official,
employee, agent, or officer of a Party shall represent that he, she or anyone else from
that Party is in any manner an official, agent, employee or officer of another Party.
17. Governing Law — This MOA shall be governed, interpreted, construed and
enforced in accordance with the law of the State of California, excluding California's
choice of law rules. Venue for any legal action or other proceeding relating to this MOA
shall be in the Los Angeles County Superior Court.
18. Severability — If any provision of this MOA shall be determined by any court to be
invalid, illegal or unenforceable to any extent, the remainder of this MOA shall not be
affected and this MOA shall be construed as if the invalid, illegal or unenforceable
provision had never been contained in this MOA.
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IN WITNESS WHEREOF, the Parties hereto have signed this MOA on the date
afterwards indicated.
The City of Palos Verdes Estates,
a municipal corporation
By: Date: ((o °h
Betty Lin eterson, Mayor
Attest: Approved as to Form:
42 nr By:
uren Pettit, Christi Hogin, City Altit,ey
City Clerk
Mailing Address: City of Palos Verdes Estates
340 Palos Verdes Drive West
Palos Verdes Estates, CA 90274
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The City of Rolling Hills,
a municipal cor•o a ••
By: ' ' Date: eC7?
c Wils• , - or
Attest: Approved as to Form:
By: By: - , / ' T-25YL—
vette
Hal , ' Cler Mihael Jen ins, City Attorney
Mailing Address: City of Rolling Hills
2 Portuguese Bend Road
Rolling Hills, CA 90274
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The City of Torrance,
a municipal corporation
By: CJS Date: 1 / 14 )
icer ey, I r
4
Attest: Approved as to Form:
BY (IA ' By: �i .-)
ecca Poirier, MMC City Clerk Patrick Q. Sullivan, City Attorney
Mailing Address: City of Torrance
Public Works Department
20500 Madrona
Torrance, CA 90503
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The City of Rolling Hills Estates,
a municipal corporation
By: �� Date: iii/CI/3
Britt Huff, Mayo/
Attest: Approved as to Form:
By: `fT By: 1 ��2�1.t //17601
Heidi Luce, City Clerk Donald M. Davisy'ttorney
Mailing Address: City of Rolling Hills Estates
4045 Palos Verdes Drive North
Rolling Hills Estates, CA 90274
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The City of Rancho Palos Verdes,
a municipal corporation
By: gift. . Date: 7 " ( 7 l
Susan Brooks, ayor
Attest: q Approved as to Form:
By: �`►� By: 4
T11[ ol••rn, City Clerk William Wynder, City Attorney
Mailing Address: City of Rancho Palos Verdes
30940 Hawthorne Boulevard
Rancho Palos Verdes, CA 90275
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County of Los Angeles,
a political subdivision of the State of California
I /
By:
Date: l42
Ma ella,
811_ Director of Public Works
Approved as to Form:
Mary C. Wickham
County Counsel
/ /
By: ,I,d"..../%1111 - p-
Date: 7/3/i 0
i ep, 0
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Exhibit A
Copy of Scope of Work
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Engineers..rm-,-wc.r.:,,x,':, Waw Exhibit A-1
Torrance Airport Stormwater Infiltration Project
Scope of Work
The Scope of Work for the project is described below, and the proposed tasks are consistent with the
schedule and budget.
TASK 'I - PROJECT MANAGEMENT
Carollo will develop a Project Management Plan to facilitate successful completion of this project
including planning, monitoring, controlling, and reporting functions. We will develop a Quality Assurance
(QA)/Quality Control (QC) Plan to establish procedures and guidelines to assure an acceptable level of
quality.
The following tasks are also anticipated to be part of the project management activities we will perform:
Project Kick-Off Meeting: Prior to beginning work, we will coordinate and participate in a project kick-
off meeting with the City.
Progress Meetings: Our team will attend progress meetings with the City staff on a monthly basis. We
will submit plans and other documents for review and comments prior to meetings and will make
revisions as requested by City staff. We anticipate attending three (3) progress meetings with the City
and stakeholders during the Preliminary Design phase of this project and three (3) meetings with
Regional Board.
We will prepare and distribute all meeting agendas prior to each meeting.We will also prepare and
distribute all meeting notes highlighting the discussion and/or decisions following each meeting.
Project Management: This task addresses the management responsibilities associated with proper
scheduling, budget control, invoice preparation and coordination with the City. Our project manager will
review the status of budget, schedule and relevant project issues together on a bi-weekly basis. This bi-
weekly status update will be used to confirm work progress, identify critical information needs, and
where appropriate alert City to any potential issues which may impact the project scope, schedule or
budget. These bi-weekly project status updates will be supplemented with monthly project status
reports that will be prepared and distributed along with Carollo's invoices.
Technical Review and QA/QC: Carollo will provide quality assurance and quality control (QA/QC)
reviews through the course of the project consistent with City's policies. Our QA/QC and quality
management procedures establish and maintain a structure for providing reviews of all work products
and adherence to industry design standards. Specific efforts for this project will include:
• Development of a Project Management Plan (PMP), which defines the project scope,
approach, deliverables, schedule, budget and provides a basis for QA/QC and technical
reviews.
City of Torrance—Torrance Airport Stormwater Infiltration Project 1
• Conformance to City's drafting and design standards, guide specifications and standard
details.
• Internal constructability review prior to each submittal
• Review of all calculations by appropriate reviewers independent of the project design
team prior to each submittal.
All work product deliverables, including detailed checking of work by in-house staff will be reviewed
prior to submittal to City. Technical reviews will include reviews for code compliance, safety,
operability, constructability, bid-ability, errors/omissions and clarity.
TASK - 2 COLLECTION/COMPILATION OF RECENT DATA
The objective of this task will be to identify common periods of record for use in the calibration effort, to
eliminate data not considered reliable, and to focus the most intensive data-gathering effort on the
most valuable items. Meetings with the technical staff of the City will be held at regularly scheduled
intervals (see Task 1) to facilitate the exchange of data and focus the data collection effort.
Task 2 will consist of the collection and organization of available data (aquitards, geological conditions,
etc.) required to comprehensively develop a robust groundwater (GW) model of the project area. This
data input to groundwater within the project area includes infiltration from precipitation and irrigation,
surface water recharge to groundwater, and influx from bedrock into the alluvial aquifers and existing
groundwater contamination plume.These inputs will be estimated using available data and hydrogeologic
analyses.
During this task, Carollo will review the inventory of data compiled by other agencies including Water
Replenishment District (WRD) and City in order to flag the data necessary for development of the GW
simulation model. These data will include groundwater elevations and quality and existing groundwater
contamination plume, aquifer tests, any additional geologic logs, precipitation records, well pumping
records, imported water use, recharge, cropping, and land use maps.
Deliverables
1) Inventory of existing data to be used in the model configuration process.
TASK 3 — GEOTECHNICAL INVESTIGATION AND MONITORING WELL INTALLATION
This task involves drilling, logging, and sampling of four borings at locations shown on Attachment A,
conversion of two borings to groundwater monitoring wells, monitoring well development, purging, and
baseline groundwater sampling, groundwater Monitoring Plan (MP) and Quality Assurance Project Plan
(QAPP), analysis of the groundwater samples by a state of California certified laboratory, and
preparation of a geotechnical report of the investigations. The work to be completed under this task will
be conducted by or overseen by a state of California licensed professional geologist or a professional
engineer experienced in this task. Additional costs are included for conducting the field activities during
the night in compliance with the Federal Aviation Administration (FAA permit) approvals.
Subtask 3.1 Geotechnical Evaluation and Monitoring Well Installation
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The subtask will include:
• Drill two 110' borings, each of which will be converted to a 4" diameter groundwater monitoring
well.
• Drill two 285' borings for soil and water sampling. Assume no more than 2 shallow water
bearing zones will require sealing off during drilling.
• Soil and water samples will be collected at 10-foot intervals to the total depth in all borings, and
boring logs will be prepared. Soil samples will be preserved and transported to the laboratory
for analysis of VOCs by EPA Method 8260B, PAHs by UEPA Method 8270 SIM.
• The two groundwater monitoring wells will be developed 48 hours after installation by surging
and pumping/purging. Water quality indicator parameters will be measured during purging and
stabilized. The two wells will be sampled seven days after development, in accordance with
Representative Sampling of Groundwater for Hazardous Substances, Guidance Manual for
Groundwater Investigation, July 1995, Revised February 2008, and California Environmental
Protection Agency Department of Toxic Substance Control. These baseline groundwater
samples will be analyzed in the laboratory for VOCs by EPA Method 8260B, PAHs by UEPA
Method 8270 SIM, and Nitrates by UEPA Method 300.
• Preparation of geotechnical report, and submittal to the Los Angeles Regional Board for review.
Subtask 3.2 Groundwater Monitoring Plan (MP) and Quality Assurance Project Plan (QAPP)
1. Prepare and submit a Monitoring Plan (MP), in a format provided by the Grant Manager.
Changes to the MP shall be submitted to the Grant Manager for review and a decision regarding
approval prior to implementation.
2. Prepare, maintain, and implement a Quality Assurance Project Plan (QAPP) in accordance with
the United States Environmental Agency's (USEPA's) QAPP guidance document (EPA QA/G-5)
or State Water Board's Surface Water Ambient Monitoring Program's (SWAMP) QAPP and data
reporting requirements, as appropriate for the proposed activities. Water quality monitoring data
includes physical, chemical and, biological monitoring of any surface water. The QAPP shall be
submitted to the Grant Manager for review and approval. A template for the USEPA QAPP is
available from the Grant Manager.
TASK 4 - DEVELOP CONCEPTUAL MODEL
The objective of this task will be to develop a thorough understanding of the local and regional geology,
hydrogeology, subsurface hydrology, water quality and existing recharge and extraction operations.
Detailed hydrogeologic studies are requisite to evaluate the contamination problems and to develop
viable and effective and management solutions. Carollo will utilize, to the maximum extent possible, the
basic data collected and analytical work completed by the other agencies including the City and WRD
to eliminate any duplication of effort. The data and products assumed to be available from the City and
WRD will include:
• Base maps showing well locations (WRD);
• Surface topography and land use ( City);
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• Regional and local scale geologic cross-sections and fence (WRD);
• Diagrams identifying the major aquifers and aquitards in the study area (WRD);
• A contour map of the base of the aquifer system in the study area (WRD);
• Maps showing the areal variation in aquifer and aquitard hydraulic conductivity,
storativity/specific yield, effective porosity (WRD);
• Water level contour maps (WRD);
• Contaminant concentration maps (WRD);
• Monthly summary of well production (WRD, City);
• Monthly summary of rainfall (City).
The maps are intended to summarize available data, consequently there may be maps which do not
cover the entire study area due to lack of reliable data. Meetings will be held with the technical staff of
City to review (see Task 1) and finalize the conceptual model proposed by Carollo.
Deliverables:
1. Technical memorandum describing conceptual model. This tasks assumes that one
draft and one final TM will be provided.
TASK 5 — UPDATE & CALIBRATE EXISTING GW MODEL
The objective of this task is to update an existing local flow simulation model (MODFLOW) needed to
analyze the infiltration and contamination issue. This analysis is needed to refine the layout and design
of the underground storage and alternative infiltration systems. The work to be completed under this
task is divided into four subtasks, as described below:
Subtask 5.1 Discretize Model (cut up model area into small pieces)
A finite grid pattern will be developed to represent the major aquifers of the study area. The location of
grids will delineate the aquifer(s) both vertically and horizontally. The density of the grids will be
governed by the scale of the model, the number and location of individual extraction/monitoring wells
and potential source areas and the need to accurately model the piezometric variations within a given
well field.
Subtask 5.2 Parameterize or Assign Hydraulic Properties
Using data collected and compiled in Task 2 and Task 3, Carollo will prepare initial estimates of aquifer
properties for each grid including:
• Hydraulic conductivity with respect to the x, y, and z directions
• Storativity/specific yield
• Effective porosity
City of Torrance—Torrance Airport Stormwater Infiltration Project 4
• Dispersivity coefficients in the x, y, and z directions
Subtask 5.3 Select Calibration Criteria, Initial and Boundary Conditions
Based on the data review, Carollo will develop the initial conditions to be simulated at the beginning of
the calibration period. Boundary conditions will be assigned to those grids located along the perimeter
of the area modeled. The boundary conditions will be either constant head, constant discharge or
impermeable (no-flow). Using available historic data, well extraction and recharge data will be
developed for the calibration period and for subsequent simulation runs.
After reviewing the data compiled in Task 2 and Task 3, Carollo will select key wells with long
histories of water level and water quality monitoring, for use in the calibration process. Using historic
data from these wells, hydrographs and piezometric levels will be selected to serve as calibration
targets to be compared with values calculated during model calibration.
Subtask 5.4 Calibration of Model
This task will include steady-state and transient calibration of the model to historical groundwater
levels, pumping, and recharge beneath the Basin. The model will be calibrated over a multi-year
period using monthly stress periods based on the patterns of change in recharge (precipitation)and/or
water level observations in the Basin. The model will also be calibrated to available pumping
(drawdown) tests. The accuracy of the transient calibration will be dependent on number and length of
stress periods simulated and the available observation data. The calibration process will involve
iterative modification of aquifer parameters and boundary conditions (within reasonable limits) in order
to minimize the residual (difference) between observed and simulated heads at selected observation
points. Information gained during the model calibration process will be used to refine and verify the
water balance estimated for the Basin.
Hydrologic data collected during Task 2 and Task 3 including well logs, aquifer test data, and, to some
extent, zone specific water level data, will be used to refine the calibration to improve model simulation
accuracy.
The objective of the model calibration, Subtask 5.4 is to adjust certain hydraulic parameters (e.g.,
horizontal and vertical hydraulic conductivity, storativity) and modify selected recharge and discharge
components until a reasonable match between the measured and modeled heads and flows is
achieved. Calibration of the groundwater flow model will be performed according to ASTM (1996,
Reapproved 2002) "Standard Guide for Calibrating a Ground-Water Flow Model Application."
Deliverables:
1. Calibrated flow simulation models (using, existing data).
2. Technical memorandum on calibration process.
3. Identification of data deficiencies.
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TASK 6 - SENSITIVITY ANALYSIS FOR A GROUND-WATER FLOW MODEL
APPLICATION
Once the updated groundwater model has been satisfactorily calibrated, a sensitivity analysis will be
performed by evaluating the response of the calibrated model to changes in estimated hydraulic
parameters or to changes in uncertain recharge and discharge components. Key parameters or
components will be those that have the most significant impact on model results within their range of
uncertainty. The sensitivity analysis model runs will be compared to a baseline model run of the
calibrated updated model to illustrate differences in results for a given parameter or component change.
The results of the calibration sensitivity analysis will be evaluated according to ASTM (1994,
Reapproved 2008) "Standard Guide for Conducting a Sensitivity Analysis."
TASK 7 - SIMULATE REGIONAL CONTAMINANT TRANSPORT
Using historical water quality and land use data from WRD and the City, Carollo will identify possible
pollutant source locations and estimate the historic level of contamination. This information will be used
with three GW Recharge Model Scenarios to simulate the plume response to the groundwater
recharge, and thereby determine the optimum size of the underground storage/infiltration system. The
three recharge scenarios are:
1. Scenario 1 — Base Run: no improvement;
2. Scenario 2 — EGRP® infiltration;
3. Scenario 3— Injection wells simulation
Deliverables:
1. Technical Memorandum which summarizes results of simulation runs and include the
following items:
a) Preliminary location of potential sources of contamination:
b) Identification of major deficiencies in available data
c) Recommendations for additional data collection activities designed to fully
characterize existing contaminant plumes and verify the suspected sources
d) Optimum size of the underground storage/infiltration system
e) Impacts on groundwater contamination plume
TASK 8 - UNDERGROUND STORAGE/INFILTRATION SYSTEM DESIGN
The optimized system will consist of two storm water treatment systems, detention units, and the storm
water injection system. Carollo will use iterative and optimization techniques to determine the size of
storage/infiltration units and select the number and capacity of injection wells. The optimized design will
be evaluated using the updated SWMM model coupled with the unsaturated and saturated flow model
(MODFLOW)_ Two storm events will be modeled using the three-dimensional saturated numerical
model MODFLOW. Recharge used in MODFLOW will be taken from the updated SWMM model.
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Carollo will evaluate up to two (2) design scenarios:
1) Storage/Infiltration system and injection wells only
2) Storage/infiltration system plus EGRP®(Energy-Passive Groundwater Recharge
Product) technology and infiltration capillary units
The EGRP®is a new technology that can be classified as a vertical capillary driven drainage device,
but in reality, it is more complex than most vertical drainage systems. In the optimized design for the
Torrance Airport Project, the top of the EGRP® may be positioned about 3 feet below the gravel bed in
which the infiltration chamber will be embedded and continues down for a depth of approximately 40
feet. Multiple EGRP®devices will be installed in groups across the entire site in a pattern designed to
maximize soil infiltration. The pattern allows the EGRP®to join separate soil layers and promotes
connectivity across the soil matrix, allowing for both improved mass flow and diffuse water movement.
TASK - 9 UTILITY RESEARCH
Carollo will research, identify and map utilities that may be impacted by this project. This task does not
include surveying the exact location of utilities. Completeness and mapping accuracy will depend on
the source data provided by Torrance Airport staff.
TASK 10 - PERMIT REQUIREMENTS
Carollo will identify permits required for the construction of the project and will create a log for tracking
the acquisition of the permits. Additionally, Carollo will coordinate with the relevant permitting agencies
to determine the specific application, application fee, contact, and any specific requirements that will
need to be incorporated into the design. Carollo will maintain a log for permitting agencies and contact
information. The log will be updated during the phase of this project. The permitting agencies include:
• Los Angeles County Flood Control District (LACFCD)
• Federal Aviation Administration (FAA)
• Los County Regional Water Quality Board (Regional Board)
Carollo will research and document all permit requirements from the permitting agencies. Final permits
will be obtained during final design.
TASK 11 CEQA DOCUMENTS
This task will be completed during Final Design of the project. Therefore, no costs are estimated for
this effort.
TASK 12 STAKEHOLDER OUTREACH
This task will be completed during Final Design of the project. Therefore, no costs are estimated for
this effort.
City of Torrance—Torrance Airport Stormwater Infiltration Project 7
TASK 13 - PRELIMINARY DESIGN REPORT (PDR)
Carollo will prepare a comprehensive PDR for Project Carollo will present the two storage/infiltration
and well field layout options and make a recommendation for the most appropriate option based on
input from the City on their goals, objectives, and budgetary restraints. The Project will require
optimizing storage volume, the hydraulic operability, the existing surface area, and capital expenditures
while eliminating the need to disrupt the existing operations of the Torrance Airport. Groundwater
quality data reported in the PDR will also be uploaded to the Geotracker GAMA by Carollo. As a
minimum, the PDR will cover the following Sections:
Section 1: Introduction / Project Overview
Section 2: Field Investigations/ Utility Research
Section 3: Design Criteria and Permitting Requirements
Section 4: Civil Site Layouts
Section 5: SWMM and Groundwater(MODFLOW) Modeling
Section 5: Underground Treatment Storage and Infiltration System Sizing, Layouts, and
Piping
Section 6: Environmental Permitting
Section 9: Construction Cost Estimates
Section 10: Design and Construction Schedules
Section 11: Conclusions and Recommendations
Appendix
1. Geotechnical Report
2. Conceptual Model Technical Memorandum
3. Technical Memorandum on Calibration Process
4. Identification of Data deficiencies
It is assumed that this task will consist of the preparation of one (1) draft and one (1)final PDR
document. The final PDR will be prepared by incorporating one set of consolidated comments
from City staff and other interested parties.
TASK 14 GRANT ASSISTANCE
This task utilizes all work completed in the previous task to support the City in its application for Prop 1
Grant and provide exhibits for Regional Board Meetings. The task includes:
1. Design Memo for City of Torrance —ONLY Torrance area of concern
City of Torrance—Torrance Airport Stormwater Infiltration Project 8
2. Design Memo for City of Torrance and Peninsula Cities (PenCities)—Torrance and PenCities
areas of concern
3. Assistance in Grant Application (Exhibits and Cost Estimate)
4. Meetings with Regional Board (as identified in Task 1)
TASK 15 UPDATE EXISTING SWMM MODEL TO INCLUDE PENINSULA CITIES
FLOWS AND INJECTION WELLS
The Torrance SWMM model approved by the Regional Board will be updated to include the PenCities
flows to Torrance and additional that may needed to accommodate these flows. This assumes that
there are flows and GIS layers that can easily be extracted and included in the model. The updated
model will then be verified using WMMS model output. If the PenCities have an existing working model,
the results from that model will be used in the model verification process.
BUDGET ESTIMATE
Carollo's estimated budget is presented in Exhibit B-1. Carollo proposes to perform the above-
described scope of services on a time and material and Not-To-Exceed Fee of$431,672.
Total Carollo Labor: $231,176
Total Subconsultant Fee and ODCs: $200,496
Total Fee: $431,672
SCHEDULE
The schedule for performing the above tasks will take approximately eight (8) months to complete. The
estimated completion date is October 1, 2018.
Notice to Proceed: 02/01/2018
Kick off Meeting 02/15/2018
Start Work: 02/20/2018
Finish Work: 10/01/2018
City of Torrance—Torrance Airport Stormwater Infiltration Project 9
Exhibit B-1
Torrance Airport Storm Water Infiltration Project Fee Estimate 5/15/2018
Hourly Billing Rate $280 $252 $205 $195 $178 $155 $125 $95 $11.90
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1.0 Project Management 12 16 25 12 18 `0 0. 4 90 $ 19,056 $ 1,300 $ • 1,070 $ • S 21,426
1.1 Project Kickoff Meeting 2 2 2 2 1 9 $ 1,925 $ 200 $ 107 5 2,232
•
1.2 Project Schedule and Progress Meetings(assume 6 meetings) 8 12 6 6 12 1 45 $ 9,895 $ 400 $ 536 $ 10,831
I
1.3 Project Management 1 18 4 1 24 $ 4,845 $ 500 $ 286 $ 5,631
1.4 Quality Control/Quality Assurance 1 2 2 2 4 1 12 $ 2,391 $ 200 $ 142 $ 2,733
2.0 Collection/Compltatton of Recent DATA 0 0 4 4 16 ' 16 ' 8 '2 50 S 8,118 $ 200 $ 592 $ • $ 5,913
2.2 Data collection and research 4 4 16 16 8 2 50 $ 8,118 $ 200 $ 595 $ 8,913
3.0 Geotechnical Investigation and Monitoring Well Installation 0 0" • , 0 0 0 0 • 0 . 0 • 0• $ , -•$ $ • $ 181,531 $ 151,531
3.1 Geotechnical Evaluation and Monitoring Well Installation 0 $ - $ - $ 175,731 $ 175,731
3.2 Groundwater Monitoring and Quality Assurance Control Plan 0 $ - $ - $ 5,800 $ 5,800
4.0 Develop Conceptual Model 1 2 8 8 80 0 0 0 99 $ 18,224 $• 200 $ 1,178 $ - S 19,602
4.1 Develop a Conceptual Model 1 2 8 8 80 99 $ 18,224 $ 200 $ 1,178 $ 19,602
I 1 .4 • . 1 ,
5.0 Update end Catlbrate Existing Groundwater Model 4 5 32 10 200 .`'32' 0 4 257 $ 51,530 $ 500 $ 3,415 S • $ 58,045
5.1 Discretisize Model 1 1 10 4 72 8 1 97 $ 17,513 $ 200 $ 1,154 $ 18,867
5.2 Parameterize or Assign Hydraulic Properties 1 1 6 2 40 8 1 59 $ 10,607 $ 200 $ 702 $ 11,509
5.3 Select Calibration Criteria,Initial and Boundary Conditions 1 1 8 2 48 8 1 69 $ 12,441 $ 200 $ 821 $ 13,462
5.4 Calibration of Model 1 2 8 2 40 8 1 62 $ 11,269 $ 200 $ 738 $ 12,207
. 1
6,0 Sensitivity Analysis Fore Groundwater Flow Model 1 2, 5 2 40 5 0 1 62 $ 11,269 S • S 738 $ • $ 12,007
6.1 Perform Sensitivity Analysis on the Developed Model 1 2 8 2 40 8 1 62 $ 11,269 $ 738 $ 12,007
I
7.0 Slmualete Regional Contaminant Transport 1 1 4 4 32 8 0 1 51 $ 9,163 $ 200 $ 607 S - $ 9,970
7.1 Identify Possible Pollutant Source Locations and Estimate the Historic Level of Contamination 1 1 4 4 32 8 1 51 $ 9,163 $ 200 $ 607 $ 9,970
8.0 Underground Storage/infiltration System Design •1 12 8 16 48 16 16" 1 118 $ 21,183 $ 200 $ 1,404 $ • $ 22,787
8.1 Prepare Conceptual Design and Sizing of the Storage and Infiltration Units 1 12 8 16 48 16 16 1 118 $ 21,183 $ 200 $ 1,404 $ 22,787
9.0 Utility Research . 0 0 1 4 ,.8 12 2 1 28, $ 4,614 $ 200 5 333 $ - $ 5,147
9.1 Research,Identify and Map Existing Utilities within the Project Area 1 4 8 12 2 1 28 $ 4,614 $ 200 $ 333 $ 5,147
10.0 Permit Requirements1 1 6• 4 12 8 0 2 36 $ 0,518 i 150 $ 425 $ $ 7,096
10.1 Identify Required Permits 1 1 8 4 12 8 2 36 $ 6,518 $ 150 $ 428 $ 7,096
11.0 CEQA Documents 0 0 0. 0 0 0 0 . 0 0 $ • $ $ • $ - $ •
11.1 OMITTED
w ,
12.0 Stakeholder Outreach 0 0 0 0, 0 0 0 0 0 S - $ • $ - $ - $
I
12.1 OMITTED
13.0 Preliminary Design Report • 2 24 32 . 80. 100 8 40 1 287 $ 52,903 $ 400 $ 3,415 S • $ 56,718
13.1 Prepare and Submit Preliminary Design Report(PDR) 2 24 32 80 100 8 40 1 287 $ 52,903 $ 400 $ 3,415 $ 56,718
14.0 Grant Assistance 1 2 40 . 40 16 0 0 2 101 S 19,522 $ 230 5 1,294 $ - $ 21,348
14.1 Provide Assistance to the City forn Grant Information,Exhibits,act. 1 2 40 40 16 2 101 $ 19,822 $ 230 $ 1,294 $ 21,346
15.0 Update Existing SWMM Model to Include Pennisule Cities 1 1 ,2• 24 , 8 8 • 0 2 46 •S 6,476 $ • $ 606 $ - $ 9,052
15.1 Update City's Existing SWMM Model Approved by the Regional Board 1 1 2 24 8 8 2 46 $ 8,476 $ 606 $ 9,082
. TOTAL,TASKS(1.15) 25 66 175 208 578 116. 66 21 1,255 $ 231,176 $ 3,880 6 15,085 $ • 181,531 $ 431,672
Page 1 of 1
Exhibit B
Cost Sharing Formula
All Parties agree to share the cost of implementing the Torrance Airport Storm Water
Infiltration Project: Preliminary Design Work as follows:
LA#4848-0897- -13-
9810 v1 -
COST SHARING Exhibit B
Between Torrance, Peninsula Cities,and LA County Unincorporated for
Preliminary Design of Torrance Airport Storm Water Infiltration Project
Drainage Area* Share* yo Cost Share
)
Partner Cities Acre Square Miles ( ($)**
Torrance 726 1.13 20.03% $ 47,733.00
Palos Verdes Estates 93 0.15 2.57% $ 6,115.00
Rancho Palos Verdes 625 0.98 17.24% $ 41,092.00
Rolling Hills Estates 1098 1.72 30.29% $ 72,191.00
Rolling Hills 642 1.00 17.71% $ 42,210.00
LA County Unincorporated 441 0.69 12.17% $ 28,995.00
Total 3625 5.66 100.0% $ 238,336.00
*From Machado Lake Enhanced Watershed Management Program(EWMP)
**Per Carollo Engineers Revised Proposal dated May 15,2018
50% Prop 1 Grant $ 238,336.00
S0% Match Fund $ 238,336.00
100% Grand Total $ 476,672.00
Admin $ . 45,000.00
Prelim Design** $ 431,672.00
Total $ 476,672.00
EXHIBIT C
Responsible Agencies Representatives
Agency Address Agency Contact
City of Palos Verdes Estates Ken Rukavina
340 Palos Verdes Drive West E-mail: krukavina@pvestates.org
Palos Verdes Estates, CA 90274 Phone: 310-378-0383
Fax: 310-378-7820
City of Rolling Hills Yolanta Schwartz
2 Portuguese Bend Road E-mail: ys@cityofrh.net
Rolling Hills, CA 90274 Phone: 310-377-1521
Fax: 310-377-7288
City of Torrance John Dettle
Public Works Department E-mail: jdettle@torranceca.gov
20500 Madrona Phone: (310) 618-3059
Torrance, CA 90503 Fax: (310) 781-6902
City of Rolling Hills Estates Greg Grammer
4045 Palos Verdes Drive North E-mail:Gregg@ci.rolling-hills-
Rolling Hills Estates, CA 90274 estates.ca.us
Phone: 310-377-1577, ext. 107
Fax: 310-377-4468
City of Rancho Palos Verdes Charles Eder
30940 Hawthorne Boulevard E-mail: CharlesE@rpvca.gov
Rancho Palos Verdes, CA 90275 Phone: (310) 544-5282
Fax: (310) 544-5292
County of Los Angeles Paul Alva
Department of Public Works E-mail: palva(a�dpw.lacounty.gov
Stormwater Quality Division, 11th Floor Phone: (626) 458-4325
900 South Fremont Avenue Fax: (626) 457-1526
Alhambra, CA 91803-1331
4848-0897-9810 v1