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CC RES 1984-073
RE SOLUTION N0. 84 -73 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF RANCHO PALOS VERDES APPROVING A PROPOSED REDEVELOP- MENT PLAN FOR PROJECT AREA NO* 19 THE CITY COUNCIL OF THE CITY OF RANCHO PALOS VERDES HEREBY FINDS, DETERMINES RESOLVES, AND ORDERS AS FOLLOWS: Section 1: The City Council hereby certifies that the Environmental Impact Report (the "EIR "), attached hereto as Exhibit A, on the proposed Redevelopment Plan for the Project Area No. 1 of the Rancho Palos Verdes Redevelopment Agency was completed pursuant to the provisions of the California Environmental Quality Act and the guidelines thereto and that the City Council has reviewed and considered the contents of the EIR prior to deciding whether to approve such Redevelopment Plan (the implementation of which is sometimes referred to as the "project "). With respect to the potential significant environmental effects identified in the EIR, the City Council finds as follows: A. The EIR identifies the loss of open space due to the construction of new housing which will be encouraged by the project as a potential significant environmental impact. Changes or alterations have been required in, or incorpo- rated incorporated into, the project which wlll substantially lessen this impact as recreation areas will be provided pursuant to the City's General Plan and access to open space- recreation areas will be increased as a result of the project. The social and economic goals and objectives of the project may not be achieved without the construction of such new housing because there is a need for housing and the development of new housing is an integral part of the plan to finance the public works essential to eliminating the blighted conditions due to the geologic instability of the project area. B. The EIR identifies increased surface water runoff due to the potential development of new housing and construction.of necessary infrastruc- ture as a potential significant environmental impact. Changes or alterations. have been required in, or incorporated into, the project which avoid or, lessen this effect as careful review of design features will be required before any construction or activity affecting water runoff is undertaken and.drainage and erosion control and silt containment measures will be imposed. C. The EIR identifies the visual impact of new housing and public work projects as a potential significant environmental impact. changes or alterations have been required in, or incorporated into, the project which substantially lessen this effect as only low density development will be permitted and detailed review and compliance with the City's Development Code, General Plan, and grading ordinance will be required prior to construction of any such improvements. The social and economic goals and objectives of the project cannot be achieved without the construction of housing and public works projects because there is a need for housing and development of housing is an integral part of the financing plan for the project. Public works projects, such as improved and expanded roadways, are essential to the development of housing, improved coastal access and the elimination of the blighted conditions and substandard infrastructure caused by the geologic instability of the project area. #701X -B20 D. The EIR identifies the disturbance of vegetation and topography as a potential significant environmental impact. Changes or alterations have been required in, or incorporated into, the project which substantially lessen this impact in that planting and-replacement of vegetation to minimize visual impacts and impacts on wildlife habitats and compliance with the City's grading ordinance and restrictions on recontouring and earth moving activities will be required before any construction or earth moving activities are permitted. Erosion control and silt containment measures will be imposed to avoid damage to wildlife habitat areas and earth moving activities will be restricted in certain areas to avoid impacts on wildlife habitats. In addition exhaustive site surveys by qualified biologists will be required prior to construciion activities and approproate mitigation to protect wildlife habitats will be imposed. the social and economic goals and objectives of the project cannot be achieved without impact on vegetation and topography because earth moving and construction activities are essential to the elimination of geologic instability and blight in the project area. E. The EIR identifies soil erosion due to earth moving and construc- tion activities as a potential significant environmental impact. Changes or alterations have been required in, or incorporated into, the project which avoid or substantially lessen this effect as erosion control and silt contain- ment measures will be imposed before earth moving or construction activities are permitted. F. The EIR identifies increased coastline visitor& and inadequate parking for such visitors as a potential significant environmental impact. The improved and expanded roadways which are part of the project will be adequate for visitor access and changes or alterations have been required in, or incor- porated into, the project, which avoid or lessen this effect as additional parking will be provided pursuant to the City's General Plan. G. The EIR identifies loss of coastal resources as a result of re- contouring, earth movement, breakwaters and seawalls as a potential significant environmental impact. Changes or alterations have been required in, or incorpor- ated into, the project which substantially lessen this effect in that careful review and compliance with the City's grading ordinance and General Plan will be required before any such activities are undertaken and coastal access and recreation areas will be provided pursuant to that Plan. The social and economic goals and objectives of the project cannot be achieved without the planned recontouring, earth movement, breakwaters and sea walls because they are essential to eliminating the geologic instability of the project area. H. The EIR identifies the loss of cultural resources as a potential significant environmental imp; tions have been required in, or incorporated into, the lessen this effect as archeological and palentological and measures to.protect such resources will be imposed or construction activities are permitted* and archeological act. Changes or altera- project which avoid or surveys will be required before any earth moving I. The EIR identifies loss of habitat areas for the Palos Verdes Blue Butterfly as a potential significant environmental impact. Changes or alterations have been required in, or are incorporated.into, the project which -2- #701X -B21 RESOLUTION N0. 84 -73 avoid or lessen this effect as surveys to identify any such habitats and any colonies of or individual blue Butterflies will be required before earth moving or construction activities are permitted and relocation or other mitigation will be required. Section 2: The City Council finds that the social and economic benefits of, increasing geologic stability, providing housing, and eliminating the blighted and deteriorated conditions and the danger to human safety and property which results from the existing geologic instability outweigh the unavoidable adverse environmental impacts of the project. Section 3: The Report required by California Health and Safety Code Section 33352, attached hereto as Exhibit A, is hereby approved. The City Council has considered such Report and all evidence and testimony for and against adoption of such Redevelopment Plan. All oral and written objections to such Redevelopment Plan are hereby overruled. Section 4: The proposed Redevelopment Plan for Project Area No. 1, attached hereto as Exhibit B, is hereby approved. Section 5: The City may expend funds which may be necessary.,or appropriate in connection with the redevelopment of Project Area No. 1. The City Council hereby declares its intention to undertake and complete any proceedings necessary to be carried out by the City under the provisions of the Redevelopment Plan. _ q Section 6: Section 6.02 of such Redevelopment Plan provides that the Agency may pay for all or part of the value of the land for, and the cost of the installation or construction of certain buildings, facilities, structures and other improvements which will be publicly owned. Each of such buildings, facilities, structures or other improvements will benefit Project Area No. 1 in that they will assist the abatement or stabilization of landslide activity, and in the case of the relocation and reconstruction of Palos Verdes Drive South, will provide needed improvements to the major thoroughfare in the Project Area. The annual budget of the City does not include funds for the installation and construciton of buildings, facilities, structures and other improvements to abate the landslide activity of the nature and scope contemplated by the Redevelopment Plan. In the case of the relocation or reconstruction of Palos verdes Drive South, the City has expended disproportionate amounts of City funds on constant repairs made necessary by landslide activity. The reconstruc- tion or relocation of Palos Verdes Drive South is not within the budget of the City. In light of the addition of Article XIIIA to the California Constitution, the City is effectively precluded from issuing its general obligation bonds to finance the above - described improvements. The issuance of special assessment bonds by the City to finance the above - described improvements in not feasible since it would place an unreasonable financial burden on benef itted property owners. } Neither the general fund of the-City nor the annual budget of the City could support debt service on other types of bonds or obligations issued to finance the above - described improvements. The City Council hereby finds and determines that the buildings facilities, structures and improvements described in -3- RESOLUTION NO. 84 -73 #701X -B22 Section 6.02 of the Redevelopment Plan are of benefit to Project Area No. 1 and that no other reasonable means of financing such buildings, facilities, structures, or other improvements is available to the City. Section 7: The City Council hereby finds that the provision of low and moderate income housing outside Project Area No. 1 will be of benefit to the project and to Project Area No. 1 will be of benefit to the project and to Project Area No. 1 and is in conformity with the provisions for low and moderate income housing in the City's General Plan. PASSED, APPROVED AND ADOPTED November 20, 1984. Mayor State of California County of Los Angeles ) ss City of Rancho Palos Verdes ) I, JO PURCELL, City Clerk of the City of Rancho.Palos.Verdes, hereby certify that the above Resolution No. 84 -73 wassw duly and `' `regularly passed and adopted by the said City Council at a regular meeting thereof held on November 20, 1984. = ~. J City Clerk,itit s of Rancho Palos Verdes -4- .RESOLUTION NO. 84 -73 #701X -B23 I I , • 1 -I •:::- • ..... .....„ •—.:de—.....1,- ' 1 , ./ , 11'111,11 i ,, . ..,...., i •p, 1 . ..1 liosi'''011 1 I 1 - -•,- ' 1 3 i ' -------- - _;,., • ..., . '').. 1 ,---1 . •_ . 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Fullerton .1 ..: ,.„, Vancouver , - , , I I , ....„ i J ::::.:....,1 46 . , 1 ••• .1 I 1:: 1 . i I , 1 I E 1 re_ 4+-4 k -4Ce-iikfr2 /00 liArd- ENVIRONMENTAL IMPACT REPORT FOR THE RANCHO PALOS VERDES REDEVELOPMENT PROJECT SCH # 84081511 City of Rancho Palos Verdes Redevelopment Agency 30940 Hawthorne Boulevard Rancho Palos Verdes , California 90274 FJ: November , 1984 • DRAFT EIR (Circulated 10/2/84 FINAL EIR (Approved FINAL EIR (Certified Complete j(-Zo-'1'-{ DRAFT ENVIRONMENTAL IMPACT REPORT FOR THE RANCHO PALOS VERDES REDEVELOPMENT PROJECT SCH # 84081511 M.- Lead Agency: City of Rancho Palos Verdes Redevelopment Agency 30940 Hawthorne Boulevard Rancho Palos Verdes, California 90274 410 Contact Person: Sharon Hightower , Director of Environmental Services Phone: (213 ) 377-0360 Prepared by: Urban Futures, Inc. 140 E. Commonwealth, Suite 201 Fullerton, California 92632 Contact Person: Jack Segal (714 ) 738-4277 October , 1984 411 , , IliENVIRONMENTAL IMPACT REPORT FOR RANCHO PALOS VERDES REDEVELOPMENT PLAN TABLE OF CONTENTS SECTION PAGE 1 yi 1 .0 SUMMARY OF ACTIONS AND CONSEQUENCES 1 2.0 INTRODUCTION 9 3 .0 PROJECT DESCRIPTION 10 3 .1 LOCATION AND BOUNDARIES 10 3 .2 PHYSICAL SETTING 10 '3 .3 • SOCIOECONOMIC CHARACTERISTICS 11 3 .4 PROJECT HISTORY 11 ' 3 .5 PROJECT GOALS AND OBJECTIVES 11 3 .6 PROJECT CHARACTERISTICS 13 3.7 SCHEDULE AND PHASING 16 ,s 3 .8 RELATED PROJECTS . 17 3 .9 INTENDED USE OF THE EIR 18 4 .0 ENVIRONMENTAL IMPACT ANALYSIS - (Primary, Secondary and Cumulative) 23 4 .1 GENERAL PLAN, ZONING AND REGIONAL PLANS 23 411 4 .2 TRAFFIC AND CIRCULATION 29 4 . 3 LANDFORMS AND TOPOGRAPHY 34 4 .4 GEOLOGY, SEISMICITY AND SOILS 35 4 .5 HYDROLOGY 42 4 .5 .1 GROUNDWATER QUALITY/QUANTITY 42 4 .5.2 SURFACE WATER QUALITY/QUANTITY 45 4 .6 VEGETATION AND WILDLIFE 49 4 .7 CULTURAL AND ARCHAEOLOGICAL RESOURCE 62 4 .8 SOCIAL 63 4 .9 AIR QUALITY 65 4 .10 NOISE 74 4 .11 COMMUNITY FACILITIES AND SERVICES 76 4 .11 .1 WATER 76 4 .11.2 SEWERS 77 4 .11.3 DRAINAGE AND FLOOD CONTROL 79 4 .11.4 SOLID WASTE 80 4 .11 .5 ELECTRICAL SUPPLY 81 4 .11.6 NATURAL GAS 82 4 .11.7 COMMUNICATIONS 83 4 .11.8 POLICE PROTECTION 84 ;. 4 .11 .9 FIRE PROTECTION 84 4 .11.10 PARKS AND RECREATION 85 _1 4 .11 .11 SCHOOLS 87 4 .11.12 HOSPITALS 88 4 .12 VISUAL 89 III 5 .0 UNAVOIDABLE ADVERSE IMPACTS 90 5.1 UNAVOIDABLE SIGNIFICANT EFFECTS 90 5 . 2 - RELATIONSHIP BETWEEN SHORT-TERM USES - AND LONG-TERM PRODUCTIVITY 92 6 .0 GROWTH INDUCING IMPACTS 93 7 .0 ALTERNATIVES TO THE PROPOSED PROJECT 94 8 .0 IRREVERSIBLE AND IRRETRIEVABLE COMMITMENT OF RESOURCES 96 9. 0 EFFECTS FOUND NOT TO BE SIGNIFICANT 97 10 .0 AGENCIES, ORGANIZATIONS AND PERSONS CONSULTED 98 11 .0 PREPARERS OF AND CONTRIBUTORS TO THIS EIR 99 12.0 BIBLIOGRAPHY 100 13.0 APPENDIX 13.1 GENERAL APPENDIX 102 A. NOTICE OF PREPARATION 103 B . COMMENTS ON NOTICE OF PREPARATION 107 13 .2 TECHNICAL APPENDIX 125 A. LEGAL DESCRIPTION 126 B. GEOTECHNICAL CONSIDERATIONS 131 14 .0 COMMENTS AND RESPONSES TO COMMENTS 144 LIST OF FIGURES 1 .0 REGIONAL LOCATION 6 2 .0 REDEVELOPMENT PROJECT AREA AND TOPOGRAPHY 7 2.0 REDEVELOPMENT PLAN 8 3.6 STABILIZATION PROJECTS 15 4 .4 SLIDE AREA 40 4 .6 HABITAT AREAS 55 4 .10 TYPICAL WINDS IN SOUTH COAST AIR BASIN 70 411 • LIST OF TABLES 411 SECTION PAGE 4 .5 .2 WATER RUNOFF VOLUMES 45 4 .6 ANIMAL SURVEY 51 4 .6 VASCULAR PLANTS 53 sf 4 .7 MARINE ORGANISMS 61 4 .10 SITE CLIMATE DATA 66 4 .10 PROJECT ANNUAL EMISSIONS: TONS PER YEAR 67 4 .10 AIR QUALITY DATE (1983) SOUTH COAST AQMD 69 4 .10 AMBIENT AIR QUALITY STANDARDS 72 4 .12 .9 FIRE PROTECTION SERVICE 85 4 .12.11 SCHOOL FACILITIES 88 411 411 411 1.0 SUMMARY OF ACTIONS AND CONSEQUENCES The proposed Project is the adoption and implementation of a Redevelopment Plan for the City of Rancho Palos Verdes in Los Angeles County. The Plan is in conformance with the City's adopted General Plan and is directed at eliminating blight by stabilizing the landslide activity within an area adjacent to the Pacific Ocean and Palos Verde Drive South. The proposed Project Area includes an active landslide, scattered residential enclaves, a major arterial, open-space/recreation, ocean-viewing points/coastal beaches, limited agriculture, and institutions. By providing for stabilization of the slide area, anticipated growth and upgrading of public facilities/utilities will occur . Residential infill and expansion, in accord with the General Plan, will produce revenue to the Redevelopment Area which will provide a base for financing necessary public improvements . Considering the magnitude of the tasks to be accomplished, in a highly scenic and sensitive section of the coast, it is anticipated that the overall long-term impacts of the Plan should be positive and beneficial. It will improve currently substandard public facilities, and it will reduce certain negative environmental conditions caused by the landslide. However , there will be some short-term and long-term negative effects and disruptions. Most of the impacts will not be substantial when properly mitigated. Still, some impacts cannot be completely eliminated with mitigation measures. The Plan provides for a major funding method which would establish a sound foundation for implementation . It also establishes the intention of the City/Agency to implement specific proposals to enhance the stability of the Area. These actions will encourage additional development as depicted in the Plan. Major public works .z. projects will create impacts which are considerable (particularly aesthetic) and they must be evaluated against the overall benefits the general public and local citizens will receive; certain environmental impacts are unavoidable. Mitigation measures may reduce the full negative impact of specific projects; however , a few negative effects may nevertheless result. At this general level of environmental evaluation, it is not possible to fully determine that all proposed segments of development and upgrading in the Project Area will not have significant impacts, even after mitigation; thus, it is strongly suggested that specific impacts be evaluated prior to undertaking major portions of the Redevelopment Plan. 1 The implementation of the City/Agency Redevelopment Plan will establish a setting for additional residential 410 development; it will also enhance upgrading opportunities for established land uses. Land use and population levels would be within the guidelines established in the General Plan. It is anticipated that property values, which have been greatly reduced, will be increased. Implementation of the Plan will result in a physically safe residential portion of the City. The increased private investment in the Project Area will provide the financial resources, through tax increments , to accomplish the expressed goals and objectives of the Plan. Beyond an increase in residential units, and the services required to meet their needs, growth inducing -impacts will be minimal in the Project Area. The Project is in conformance with the City's General Plan. Adverse impacts can be anticipated in relation to open space/recreation, aesthetics and wildlife/natural resources. Regarding aesthetics, the Project Area is highly scenic with vistas and views from land towards the Ocean; however , when seen from the highway or waterfront (looking towards land) it reveals a landscape consisting of a shattered, narrow road generally void of orderly vegetation with a utility "system" consisting of exposed pipes and wires. This condition particularly applies to "foreground" views from the roadway, or views of those areas close to the road. The background and middleground looking inland from the road, however , appears natural and relatively undisturbed. The foreground hillside as seen from the road, is rather scarred and broken with clear evidence of substantial erosion. Residential units appear scattered, older and in some cases, on uncommon foundations. With a road-speed limit of fifteen (15 ) miles per hour , automobile occupants are able to fully observe all aspects of a seriously deteriorated natural and people-made environment. Pedestrian and bicycle traffic are also exposed to the scenic decline of the Area and elements of a hazardous physical condition. Along the immediate waterfront, land is barren and its interface with the Ocean shows signs of extreme erosion--e.g. , brown water areas extending outward from the shoreline. Broken material and earth from previous road construction is fully exposed to viewers. In general, certain parts of the Project Area, whether viewed from the Ocean or roadway, are visual blighting influences on scenic beauty. The readily apparent conditions are only a glimpse of the hazardous deterioration below the surface of the Area. 2 yj 411 With the implementation of the Redevelopment Plan, the view from the Ocean and Palos Verdes Drive South towards the hillside will reveal more residential uses which will, to a noticeable degree, detract from a more open-recreational environment. Mitigation, including maintaining a suburban residential density, landscaping, new streets which "flow" with the topography, and building material with an emphasis on earthtones, will reduce negative impacts. Mitigation should be applied on a case-by-case basis within an overall community design framework . The reduction of open-recreational land will occur as residential uses are developed along with necessary infrastructure; however, this development will take .place within the context of the General Plan and Redevelopment Plan and subject to individual environmental analysis. Recreational land will be ' provided as contained in the General Plan. Approval and implementation of the Rancho Palos Verdes Redevelopment Plan will enable the use of land resources in various ways that are consistent with the current General Plan. This would increase residential dwellings by 300-500 units and thus, reduce present open space. Residential uses would require additional streets . Streets should be developed to local standards and follow established topography. Surface runoff would be increased and existing topography and vegetation would be disturbed. Refer to the paragraphs that follow for suggested mitigation measures. Major public works projects would become readily visible throughout the Project and possibly not all of them would blend fully into the coastal environment. Visitors to the coastline will generate demand for parking; while the roadway will be adequate for travel, parking may be a major problem unless adequate off-street parking is provided. Additional parking is anticipated by local plans. In order to eliminate or minimize impacts to vegetation and wildlife, and in order to offset unavoidable impacts, the following mitigation activities shall be performed and incorporated in the proposed Redevelopment Plan. All earth moving activities shall be restricted to the areas where it is absolutely necessary. No earth moving activities are planned to occur in Habitat Area A, except for the purpose of installing lined channels . (Refer to the Habitat Areas Map in the body of this Report) . 411 Erosion control and silt containment practices shall be implemented during all earth moving activities in order to prevent unnecessary addition of silt to adjacent marine habitats. 3 Af-ter earth moving activities are completed, the exposed soil shall be re-seeded/re-planted with species of 411 natural Coastal Sage Scrub/Chaparral vegetation. These species can withstand the dry southern California climate, provide excellent soil stability control, and provide natural food and shelter resources for natural wildlife. Once final dewatering plans are developed, they shall be carefully evaluated in order to assess the potential impact that a drop in groundwater could have on deep-rooted trees, springs, riparian vegetation and other groundwater related resources in the project site. Measures to minimize such impacts shall be implemented after the investigation. Dewatering well pumps shall be placed underground in the long term to 'minimize visual and. noise impacts . Once final seawall and rock revetment plans are developed, they shall be carefully evaluated in order to ensure that their construction will not significantly impact intertidal or offshore marine communities. The study shall identify needed mitigation measures which should be implemented as a part of their construction. Once final plans are developed for the construction of channels at various site locations, they shall be carefully evaluated and designed to ensure that their construction will not significantly impact natural Coastal Sage Scrub/Chaparral, riparian and other native habitats in their vicinity. The vegetation and wildlife survey performed for the EIR was not exhaustive and only provides basic information as to the generalized biotic regime of the project site; it is neither exhaustive nor necessarily complete. Therefore, before any construction begins or is approved, for any portion of the project, detailed and exhaustive site surveys for each respective construction area shall be performed by a qualified biologist in order to ensure that impacts on vegetation and wildlife are minimized, eliminated or otherwise properly mitigated. Detailed surveys shall be performed for various construction areas for the specific purpose of finding evidence of the presence of the endangered Palos Verdes Blue Butterfly or its principal food sources. Surveys shall be performed only during seasons where the butterfly and its food source are active in the environment. 4 411 Impacts upon individual or colonies of the Palos Verdes Blue Butterfly shall be avoided. If any impacts appear to be likely, relocation or other proper mitigation measures should be taken. Archaeological/Paleontological surveys shall be conducted before construction and earthmoving activities by a qualified expert to determine if such resources are present. Measures shall be taken to mitigate impacts on x these resources, if present, prior to construction activities. Among impacts found to be insignificant are energy, noise, air quality, seismic, circulation, solid waste, communications, safety services, education, medical, shopping and employment. !II 5 LOS ANGELES COUNTY VENTURA COUNTY LOS ANGELES • SA TA MONICA • LONG B ACH ORANGE COUNTY _ N RANCHO PALOS VERDES SITE MIFF REGIONAL LOCATION MAP 6 • .........morriiii• t 5 .• .. , ,. 0 • .. - ‘,.• 4 ill. ...••... • . . ler ..... ...,‘ .., ..t ..„..1%::? dip ■ . ."-it I 1.7, .8 ..„.....,.....4. :cl.: ..• ..„. ..:..,• I,i./' • z \ • .‘••et ...;-•-,„1, ., -, , N.. -„," • .. ..•.-,.. '• •-... . •• - .- • - •. o ...4."N ,11, , ► 2 fit' ;:� i : :'. I'l.. 41;•e• .•. -•0 i (Obt.,,,; 7-. ' P. ... t is .0!r• - ,;,••)"..-:,,.. 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I ACRE ••• • -• . ••••••• ••- •• •••.. • •♦••. , i, ., ••••,• •fr.•1%.••••.•:••`••��::ii fA-: 411 2.0 INTRODUCTION The purpose of this Environmental Impact Report (EIR) is to fully assess the impacts associated with the establishment and implementation of the Rancho Palos Verdes Redevelopment Project in Los Angeles County. The Redevelopment Project does not propose specific developments with detailed design; therefore, the scope of this EIR is more general, with its focus on overall impacts . Additional environmental studies will be undertaken on each significant development, or series of projects, as proposed during the life of the redevelopment project. Mitigation measures set forth in this EIR can be incorporated by reference into subsequent environmental studies on detailed development plans within the Project Area. Principal benefits resulting from the formation of the Rancho Palos Verdes Redevelopment Project and adopting the Redevelopment Plan include the ability to-- * Exercise more local control over the future approach to stablization and use of land within the Redevelopment Area. * Accomplish capital improvements so as to eliminate blight and stimulate more productive land use. 410 * Recover expenditures incurred by capturing the incremental increases in property taxes resulting from the addition of assessed value in the Project Area. The EIR has been prepared to comply with the California Environmental Quality Act (CEQA) , State EIR Guidelines and the City/Agency EIR procedures. It is intended to provide information and analysis enabling appropriate public agencies, concerned organizations and individuals to evaluate the environmental impacts of adopting the proposed Redevelopment Plan. It sets forth specific measures to mitigate potential significant adverse effects upon the environment. 2` The City of Rancho Palos Verdes and its Redevelopment Agency are obligated to balance potential adverse environmental impacts against social and economic policies and objectives. This document presents an objective analysis of existing conditions, impacts and mitigation measures and is not intended P 9 to provide recommendations as to whether or not the Rancho Palos Verdes Redevelopment Project should ultimately be adopted. 411 9 3.0 PROJECT DESCRIPTION 3 .1 LOCATION AND BOUNDARIES Alb The proposed City of Rancho Palos Verdes Redevelopment Project encompasses approximately twelve hundred and forty (1,240 ) acres including an unstable slide area along the coast. It is an Area generally between Sea Cove Drive extended north towards Crest Road (west boundary) and land west of Schooner Drive extended north to the City of Rolling Hills (east boundary) . The northern boundary terminates prior to reaching Crest Road and the southern boundary is to the mean hi gh tide line along the City' s boundary with the Ocean. Refer to the Project Area Map for more precise boundaries and the legal description included as Technical Appendix A. The proposed Project is primarily a residential and recreational land-use undertaking focusing on an area of the City which the Redevelopment Agency has determined is in a state of blight (physical, social and economic) as defined by the California Community Redevelopment Law. • 3 .2 PHYSICAL SETTING The Redevelopment Project is situated on land containing steep slopes and marine terrace benches underlined with metamorphic rock ; an overlay of sedimentary rock extends landward from the Ocean. The movement of the landslide over time has modified the Project Area landscape so that presently land stability is a major problem. Due to sea cliff erosion hazards along most of the coastline in the Project, special setback (no build) areas have been established; these areas of coastal-setback zoning , provide considerable open space and access for the general public. Because of active slides, a moritorium has been placed over much of the Project Area; the focal point of the unstable topography is Portuguese Canyon supplemented by Klondike and Altamira Canyons. Palos Verdes Drive South is the main people-made physical feature in the Project Area; a water tank exists north of Peppertree Drive within the Portuguese Bend Canyon Area. Over the last forty (40) years, both people-made and natural events have had a considerable impact on the Project Area's physical form and stability. Existing land and uses in the Project include about two hundred twenty (220) dwelling units, a riding club, Wayfarers Chapel and substantial open space. Open space-recreational land comprise more than half the acreage in the Project . The established development pattern consists of single-family dwellings on large lots, one-half acre or greater , with the eastern area of the Project containing a number of smaller parcels. 411 • 10 411 Due to recreational areas, large-parcel development, topography and road construction standards, streets and rights-of-way are below the usual twenty-five (25 ) to thirty (30) percent of developed land. The Project Area is void of commercial-industrial activity and the Redevelopment Plan provides for a continuation of this position. 3.3 SOCIOECONOMIC CHARACTERISTICS The estimated population in the City of Rancho Palos Verdes is 44,700 with a build-out holding capacity expected of between 49,700 and 50 ,700. Population of the Project Area is approximately 660 residents in mostly owner occupied, single-family homes at lower density. The City and Project Area_are residential in character; a majority of residents of the area are college educated and employed in professional and managerial occupations. Average income in the City is well above the State average; City housing values are more than $350,000 for single-family dwellings and about $200,000 for condominiums. Family size has been decreasing in the City and this has been reflected in a declining school enrollment of more than five (5) percent a year in the District. Approximately ninety (90) percent of School District graduates go onto institutions of higher learning. 3 .4 PROJECT HISTORY On July 17, 1984 the City Council adopted Resolution No. 84-43 designating a Survey Area for redevelopment project consideration by the Planning Commission. The Commission on July 24, 1984 adopted Resolution No. 84-20 selecting a specific Project Area; on September 4, 1984, the City Council approved the circulation of the Draft Redevelopment Plan for the Rancho Palos Verdes Redevelopment Project. After City Council/Agency approval of preliminary requirements, work began on the Redevelopment Plan, Report on the Plan and an Environmental Impact Report. 3 .5 PROJECT GOALS AND OBJECTIVES The General Plan has provided a flexible goals and objectives framework for more specific policies and implementation programs. A goal may be defined as an ultimate end towards which effort is directed. Goals are general and usually not completely achievable within the planning time frame. 411 11 An objective may be defined as a more specific statement focusing on one or more issues. Objectives are usually achievable within the planning period. 110 The Redevelopment Project's primary mission is to, with a keen awareness of the sensitivity of natural environment, stabilize the slide area and implement the General Plan. Additional goals and objectives are as follows: * Revitalize and place into productive use those activities expressed in the adopted Redevelopment Plan. * Retain recreational uses contained in the Plan. * Improve the transportation and circulation system in the Project Area. * Retain and improve vistas and physical access to the coastline. * Eliminate blighting influences . * Upgrade the drainage and utility system serving the Project Area. * Insure that additional residential development is environmentally sound and suburban densities are 411 retained. * Provide a positive financial program to implement improvements found necessary. • 410 12 3 .6 PROJECT CHARACTERISTICS Existing conditions are preventing the full implementation of the General Plan and hindering achievement of the stated goals and objectives for the Area. Through the redevelopment process, the Agency will determine the most productive and environmentally sound approach to stabilize and enhance the existing deteriorated conditions of the Project Area. The proposed redevelopment of the Project Area would attain the purposes of the Community Redevelopment Law of the State of California. The designated Area is in need of revitalization and is suitable for redevelopment under the provisions of the California Community Redevelopment law and statues (Part I of Division 24 of the Health and Safety Code) . A substantial number of parcels throughout the Project Area exhibit a lack of productive use. A number of existing residential structures are (approximately forty-40) threatened by the slide; this is a safety problem. The unstable physical environment is a serious condition which requires redevelopment. The redevelopment process will assist in establishing a stable physical base from which a more productive and safe portion of the City can be created. The Project as a whole shows blighting influences due to the 410 existence of slide-threatened structures, as well as below standard public improvements, public facilities and utilities. The active slides have also established a situation which hinders public access to coastal recreation areas and destroys marine life. The deficiencies are of such a magnitude that they cannot be remedied by private or local governmental action without redevelopment; the most productive approach to achieving the goals and objectives planned for the Area is by utilizing redevelopment. Benefits will be provided to present and future residents of the City and Area as well as to visitors. The primary objective of the proposed Redevelopment Project, as previously stated, is to stabilize the active Portuguese Bend Landslide in the City of Rancho Palos Verdes in order to abate a significant geologic hazard. The Project Area includes the landslide itself plus additional hazardous land which immediately surrounds the slide. The overall project consists of numerous distinctive separate activities, each of which is essential in order to control the movement of the slide. Possible projects include the following: 1) Installation and operation of dewatering wells; 2) Surface drainage channels and piping; 3) Earth movement and grading; 4) Realignment of Palos Verdes Drive South; 5 ) Installation of Seawalls and/or breakwaters; and 6) Beach and bluff erosion control. 411 13 The development of each of these projects will only occur at certain designated locations throughout the Project Area. A summary description of each project and the proposed 410 development location is as follows: DEWATERING WELLS - Several dewatering wells will be installed and distributed rather uniformly throughout the central portion of the site (now mostly occupied by residential development) and within the heavy slide area which occupies the eastern portion of the site. The purpose of the wells is to extract lubricating water from the vicinity of the base of the slide. 1 SURFACE DRAINAGE - Culverts and channels may be installed at various locations within the Project Area. Several possible re-established drainage channels are proposed for the slide area itself . This would include surfacing of channels and the installation of underground flood control . Channels in upland canyons of the Project Area may be surfaced in order to reduce seepage into the soil. EARTH MOVEMENT AND GRADING - Approximately three million cubic yards of earth may be moved and recontoured. Earth moving activities principally should be restricted to the well-defined Portuguese Bend Landslide area in the eastern portion of the Project Area. Large amounts of earth may be removed (borrowed) from some portions of the slide in order to remove the driving force. The coastal bluffs should be reshaped, terraced and recompacted in order to reduce erosion. Grading and 411 recontouring may occur within, and immediately adjacent to the slide area adjacent a in order to establish proper surface water drainage. No significant earth movement projects are planned for any other areas of the site. REALIGNMENT OF PALOS VERDES DRIVE SOUTH - Palos Verdes Drive South should be realigned in the slide area. SEAWALL AND BREAKWATER CONSTRUCTION - Seawalls or revetments are proposed in the slide area in order to reduce beach and bluff erosion. Seawalls would be placed on a ortion of the existing P ing beach and would be back filled i l led with earth. Such seawalls would result in the elimination of beaches in these locations. The installation of a breakwater is a possible alternative to the seawall. A rock revetment is ro osed to be P P placed at the foot of the bluff between Portuguese Point and Inspiration Point in order to reduce bluff erosion. Such a revetment would not necessarily eliminate beaches in this area. Refer to map indicating potential locations and activities of these suggested projects. 410 14 , . ' 0 S redevelopment project ,1 4 , r \ I \l ....Al‘.... ‘ (.# ) ... .....m.....■,.. / ."'".*1 . ■ \I ■„... ) /,' kb. r \ — \\■ legend 1 Ii 4rft /4 % I \ ...4.....-eitiviwionts.-.........:::.............::.:.....:.::,... // SURFACE DRAINAGE l .:....Itti!sr:-...:.•••••inietiViii:•":1:::.:::::::.... ..........:::::::.:.:.::::iebv. 4 s Ito& •••••••:..,.....:::••• 11,1/pip ., I ■ ........::::i::•:.::•::::.:••:.-:.:::::: )**140-8#41AftitiViiiii'...:ill.7; biliP7 ( ii ::•:::::: :..i::::..::::::.:44,4$4,451#4..-..:•:::. :::::.:.Igt.'..:::'..*it/ ' ‘ WATER EXTRACTION I .....:::.:::::y::i:::::::::::41.k. %., 474m;:...::: ▪ •* *:::::::.:....:ii:::::::.:,:lifilll /pi (II ‘ /%, I :::::::::::::::•.::::::::::;.::40._,,o_cocissIVOYAO:11:::* :•fl• i.;::::::•:::::.....*:•:%:.iii.ii lit 11/1 1 / \ // i . .14,911741; " ••-:'..***:*•):.;.".,. :::i....::....:'Oil'.1 11 I '1 i -............-..:.„,,ig...ip„*.•...:::::::::::, ..::•::.:::::::1,, :Pro, borrow area 11111111ill BULK OF EARTHMOVING .1'-' ' ::-..N.-::.::•.9cw::::::*----.1.:i.:.:::.v.:::::::.:i:f7 li,1.0 ; • - LOS 440"::::::::';:::::::::::::..:::::.::::....*:;;;;::::::::.::•:::::::;:ii,II P iiiPS • , v ; `‘. 'N.* :i.:::::::::::::::;•::::::::::::,..::::::::.:.:........::::„04,illiglin , fill aria [7 RECONTOUR •\:.;::::...::::• ::.:-.. i ,...,,,,,,,. - • seawall‘Nt . ::—...7.7'.. --, :171:://11Hili—iiiiliilliii 0 11 .. . *. ..•• ' •—• "41-"••••••••••:::::.::. . ' *Ve.::.__ _•ee.:.'.. 1 /417,1 # ,._—_,444.4_,.u. < 1 i seawall -A— v rock revetment) 144 PACWIC OCEAN 7 \ \ / breakwater.(Ppaillbla) 4 , urban futures sept 84 N 0 •00 2400 4000 .0 .mm0 sumerms .......low 11..... 1111.11.11.1 mew Elmomme 400 1600 3200 1--b stabiluzation projects rancho palos verdes 411 3 .7 SCHEDULE AND PHASING The development within the Project Area will probably be phased over a forty (40.) year period, with an emphasis on public improvements accomplished within the first ten (10 ) years of the program. Construction on specific projects will commence as soon as financing, designs and environmental clearances can be accomplished. The previous section of this environmental document stated the projects of immediate importance (Project Characteristics) . The separate but interrelated series of projects will be implemented in a continuous flow of activities; among the projects in the Draft Plan are dewatering wells, culverts, surface drainage, breakwaters (wave energy dissipators ) , jetties, culverts, housing, grading, roads, erosion stabilization, beach improvements, seawall, backfill, and other related and necessary specific projects to implement the Redevelopment Plan. Tax increment accruing to the Agency is not expected to exceed one hundred eighty million dollars ($180,000,000 ) in 1984 value; also, at no time will the amount of bonded indebtedness exceed sixty million dollars ($60,000,000) . fi 16 3.8 RELATED PROJECTS The City's - Capital Improvement Program, General Plan, Coastal Plan and Parks_ Master Plan provide a listing of proposed public 411 improvements, of which the following closely relate to the Project Area: * Monitoring Dewatering Wells (Portuguese Bend Slide) and Drainage of Ishibashi Lake. * Arterial Sign Upgrading. * Safety Improvements along Palos Verdes Drive South to include channelization at Portuguese Bend Slide entrance. * Klondike Canyon Drain - Replace existing 48-inch Culvert under PVDS. * ..PVDW/S Reconstruction - upgrade road between Hawthorne ' Blvd. and the entrace to Marineland. * Patching , Heater scarifying and slurry sealing PVDS and 25th St. from Palos Verdes Drive East to the L.A. City limits. * Reconstruct 25th St. between La Rotonda and the City limits. * Reconstruct Palos Verdes Drive South Eastbound Lanes from Marineland Entrance to Wayfarers Chapel . * Upgrade Abalone Cove Beach Park . * Improve various streets in accord with the Pavement Management System, including PVDE. * Implement Phases of the Trails Plan. This is the City's initial Redevelopment Project and adjustments in priorities outside its boundaries may be necessary as specific projects are designed and implemented which impact the redevelopment program. 17 3 .9 INTENDED USE OF THE EIR 411 This "_Environmental Impact Report for the Rancho Palos Verdes Redevelopment Plan" has been prepared in accordance with the California Environmental Quality Act of 1970 (CEQA) and the "Guidelines for the Implementation of the California Environmental Quality Act" ( "State CEQA Guidelines" ) , as amended. The determination that the Rancho Palos Verdes Redevelopment Agency is the Lead Agency for the Project is made in accordance with Section 21067 of the Public Resources Code, which states " 'Lead Agency' means the public agency which has the principal responsibility for carrying out or approving a project which may have significant effects upon the environment" . The "Project" involves possible activities and actions proposed to implement the proposed Redevelopment Plan for the Project Area. It is recognized, however , that an Environmental Impact Report on a proposed redevelopment project, adopted at the time that the proposed project itself is being considered for adoption, is necessarily general in nature and cannot reflect detailed impacts of specific developments to occur during project implementation since the nature, scope and locations of such developments are generally 411 unknown at the time of project adoption. It is for this reason that this EIR is programatic in nature. The State CEQA Guidelines describes a "program" EIR as follows: 15168 (a) General. A program EIR is an EIR which may be prepared on a series of actions that can be characterized as one large project and are related either : (1 ) Geographically, (2) As logical parts in the chain of contemplated actions, (3) In connection with issuance of rules, regulations, plans, or other general criteria ti to govern the conduct of a continuing program, or (4 ) As individual activities carried out under the same authorizing statutory or regulatory authority and having generally similar environmental effects which can be mitigated in similar ways. 18 (b) Advantages. Use of a program EIR can provide the following advantages. The program EIR can: !II (1 ) Provide an occasion for a more exhaustive consideration of effects and alternatives than would be practical in an EIR on an individual action, (2) Ensure consideration of cumulative impacts that might be slighted in a case-by-case analysis, (3 ) Avoid duplicative reconsideration of basic policy consideration, (4 ) Allow the Lead Agency to consider broad policy alternatives and programwide mitigation measures at an early time when the agency has greater flexibility to deal with basic problems or cumulative impacts, and (5) Allow reduction in paperwork . (c) Use with Later Activities. Subsequent activities in the program must be examined in the light of the program EIR to determine whether an additional environmental document must be prepared. 410 (1 ) If a later activity would have effects that were not examined in the program EIR, a new Initial Study would need to be prepared leading to either an EIR or a Negative Declaration. (2) If the agency finds that pursuant to Section 15162, no new effects could occur or no new mitigation measures would be required, the agency can approve the activity as being within the scope of the project covered by the program EIR, and no new environmental document would be required. (3) An agency shall incorporate feasible mitigation measures and alternatives developed in the program EIR into subsequent actions in the program. (4 ) Where the subsequent activities involve site specific operation, the agency should use a written checklist or similar device to document the evaluation of the site and the activity to determine whether the environmental effects of the operation were covered in the program EIR. 19 _ (5 ) A program EIR will be most helpful in dealing 411 with subsequent activities if it deals with the effects of the program as specifically and comprehensively as possible. With a good and detailed analysis of the program, many subsequent activities could be found to be within the scope of the project described in the program EIR, and no further environmental documents would be required. (d) Use with Subsequent EIRs and Negative Declaration. , 1 A program EIR can be used to simplify the task of preparing environmental documents on later parts of the program. The program EIR can: (1 ) Provide the basis in an Initial Study for determining whether the later activity may have any significant effects. ( 2) Be incorporated by reference to deal with regional influences, secondary effects, cumulative impacts, broad alternatives, and other factors that apply to the program as a whole. (3 ) Focus an EIR on a subsequent project to permit 411 discussion solely of new effects which had not been considered before. (e) Notice with Later Activites. When a law other than CEQA requires public notice when the agency later proposes to carry out or approve an activity within the program and to rely on the program EIR for CEQA compliance, the notice for the activity shall include a statement that: (1 ) This activity is within the scope of the program approved earlier , and (2) The program EIR adequately describes the activity for the purposes of CEQA. Note: Authority cited: Sections 21083 and 21087, Public Resources Code; Reference: Section 21003, Public Resources Code; County of Inyo v. Yorty, (1973) 32 Cal. App. 3d 795. Formerly Section 15069.8 . 411 20 The following is the discussion on the uses of the program EIR by the State Office of Planning and Research: "The P rogram EIR is a device originally developed by federal agencies under NEPA. Use of this approach was recommended for CEQA in the court decision of County of Inyo v . Yorty cited in the note. The detailed description of the permissible uses of this document are provided in an effort to encourage its use. The program EIR can be used effectively with a decision to carry out a new governmental program or to adopt a new body of regulations in a regulatory program. The program EIR enables the agency to examine the overall effects of the proposed course of action and to take steps to avoid unnecessary adverse environmental effects . Use of the program EIR also enables the Lead Agency to characterize the overall program as the project being approved at that time. Following this approach when individual activities within the program are proposed, the agency would be required to examine the individual activities in the program EIR. If the activities would have no effects beyond those analyzed in the program EIR, the agency could assert that the activities are merely part of the program which had been approved earlier , and no further CEQA compliance would be 411 required. This approach offers many possibilities for agencies to reduce their costs of CEQA compliance and still achieve high levels of environmental protection. " Due to the procedure followed for the adoption of a redevelopment plan and the unknown nature of the Agency's future activities and projects, it is not possible to accurately and completely assess all resultant environmental impacts. The listing of capital improvement projects included in the Rancho Palos Verdes Redevelopment Plan and in Sections 3.6 and 3.7 of this document are desired or possible activities of the Agency, not set or scheduled projects. These activities cannot be accurately scheduled or pursued due to the uncertainty of the amount and rate of future monies available to the Agency. As with most redevelopment plans, public improvements listed have been represented as desired or possible projects pursued by the Agency; it should be understood as such. These listings of desired or potential activities have been assembled to indicate the characteristics of possible future specific actions by the Agency as points of information, not as set or adopted programs. 21 As noted throughout the draft EIR, the Redevelopment 411 P1-an and its activities shall conform to the goals, objective and policies of the Rancho Palos Verdes General Plan. At the time of its adoption, the General Plan was determined to be in compliance with CEQA, which includes its goals, objectives, policies and implementation. Furthermore, most of the possible activities currently being considered by the Agency should not differ from the framework of the General Plan or from what could be viewed as necessary maintenance or upgrading of public facilities or service, should funds currently be available for such activities; however, such funding is not available for the required maintenance, upgrading or new construction of public facilities and services, and this is one of the major reasons for the City to pursue "redevelopment. Without redevelopment, the required k-� maintenance, upgrading or new construction of public facilities and services would continue to occur, as it has in the past, although it would be at a pace that would be unable to keep abreast of the growing problems. This is not an adequate or acceptable rate of improvement from the standpoint of public safety or providing needed public services and facilities. If the needed improvements to public facilities and 410 services were to occur independently or without redevelopment, they would still be subject to compliance with CEQA. The same would apply to major actions in conformance with the General Plan. Although specific actions, programs and improvements have not been established by the Agency, such activities would still be subject to full compliance with CEQA although they are not specifically addressed in this programmatic EIR. Thus, the exact, final listing of all activities by the Redevelopment Agency does not have to be addressed in this programmatic EIR and as such activities occur they shall be subject to compliance with CEQA at that time. 411 22 4 .0 ENVIRONMENTAL IMPACT ANALYSIS _ (Primary, Secondary and Cumulative) 4 .1 GENERAL PLAN, ZONING AND REGIONAL PLANS 4 .1 .1 GENERAL PLAN A. Setting } Two years after its incorporation as a General Law City, Rancho Palos Verdes adopted its General Plan (1975) . This Plan, which had considerable active citizen o participation, did not follow individual traditional elements as listed in the California Government Code - i .e. , land use, circulation, housing, conservation, open space, seismic safety, noise, scenic highways and safety - but integrated all required components into three ( 3 ) principal sections: Natural Environment, Social/Cultural, and Urban. These were supplemented with a Land Use Plan and Fiscal Analysis; the comprehensive planning program incorporated environmental considerations throughout the final text and map thus eliminating the necessity of producing a separate Environmental Impact Report (EIR) . The General Plan articulated formal local goals and policies which provided the foundation to guide the newly created City in matters of environment, land use, socio-economics, finances, infrastructure, safety, public facilities, transportation and open space. This systematic approach set strong and clear guidelines for the future welfare of this coastal community. Because this Plan was developed with considerable flexibility and vision, it has served the City's needs for nearly a decade. A Specific Coastal Plan has amended the General Plan in the Coastal Zone. B. Impacts The General Plan places most of the Redevelopment Area in either a low density residential use or open space category. An extensive hazard zone notes those lands subject to active landslides and unstable soils. These areas, without major stabilization, either natural or people-made, will remain a permanent safety-blight influence on the coastal area of the State. General Plan principal land-use designations are supplemented by Overlay Control Districts to add necessary environmental mitigation in order to achieve compatibility with the City's sensitive physical features. 23 Palos Verdes Drive South will continue to provide the 410 vehicular spine of the coastal circulation system in the Redevelopment Area. The Redevelopment Plan is compatible and consistent with the General Plan. The General Plan, for the Redevelopment Area provides ample open space between Palos Verdes Drive South and the Ocean by a land use designation as a hazard area and overlaying it with a control district of ;: . socio-cultural. A natural control district has been placed over almost all of the General Plan residential-use categories. In order to move towards implementation of the land-use arrangement in the General Plan, geologic conditions require slope stabilization. It is well recognized in the Plan that the primary hazard is associated with landslides; also, required is effective land resource management of intertidal marine assets especially in areas of land ocean interaction. A coastal specific plan provides bluff access and limited public parking off Palos Verde Drive South. C. Mitigation Any new residential uses in the Portuguese Bend/Redevelopment Area will require overall slide 110 stabilization and individual sensitive mitigation measures on a case-by-case basis. At this point in the City's development, the establishment of a Redevelopment Area would activate another "tool" it needs to achieve a secure, safe and quality environment. Unless a consistent financial base can be created to motivate necessary major infrastructure improvements, the City will continue to absorb high maintenance costs and significant disruption to its daily living activities. The General Plan is the basis for the Redevelopment Plan. The safety hazard of the Palos Verde Drive South, as well as the present visual pollution of above-ground utility facilities, must be addressed and eliminated. This would promote better vehicular circulation and shoreline access. An enhanced scenic area would add to the City's image and the enjoyment of the coastline. Pedestrian, bicycle and trail access would be promoted and take a more significant place in the work/recreation travel pattern of the City. 411 24 4 .1. 2 ZONING A. Setting As one means of implementing the General Plan and Redevelopment Plan, the City has developed and applied a series of specific zoning districts; overlay and control categories supplement primary land use. Residential and Open space districts form a considerable -`1 portion of the zoning in the Redevelopment Area While the city has seven (7 ) single-family residential districts, the Redevelopment Area contains mostly those with lower densities: RS-1, RS-2 and RS-3 . These zones provide for a maximum density of two (2) residential units per acre except in a very small area in the southeastern section of the Project Area (off Palos ' Verdes Drive South) which are RS-3 and RS-5. An Open Space District, (OH) notes vast sections of the Redevelopment Area are a hazard due mainly to landslides. Some areas of existing residential development are zoned OH. An equestrian special district forms a loop around much of the residential zones north of Palos Verdes Drive South. B. Impacts In general, the OH Open space - Hazard classification describes areas where, unless an effective method of slide stabilization is achieved, no principal permanent development is permitted. These are areas of the City which are presently a public health, safety and welfare problem and usually have a topographic slope which exceeds thirty-five (35) percent . These areas experience downslope movement and are unstable for development. In 1978, the City instituted a moratorium on land-use permits in identified landslide areas; this moratorium has made much of the Redevelopment Area not available for residential development. The coastal area, between Palos Verdes Drive South and the Ocean, is mostly in an OH district within the Redevelopment Area. A Specific Plan covers the entire coastal zone within the City and is open space - re creation oriented. A coastal bluff setback zone identifies areas in which new development is prohibited. Small pockets of RS-1, RS-2 and RS-5 zoning are located along the coast mostly on the eastern edge of the Redevelopment Area.- Without a Redevelopment Project, only continued deterioration of the environment can be expected. 110 25 !II C.- Mitigation Unless an effective program of stabilization and infrastructure upgrading is established in the Redevelopment Area, Rancho Palos Verdes will continue to tolerate high maintenance costs; visual, above-ground utility pollution; vehicular road safety hazards; underutilization of coastal resources; erosion and .:r drainage problems. Public access to the coastline will } be in a constant state of disruption. Present zoning conforms to the General Plan and Redevelopment Plan. Rancho Palos Verdes is a City oriented towards single-family residential land use at lower densities which permits site planning to protect the fragile physical environment; open space and recreational areas are woven throughout the fabric of the community and provide opportunities for dramatic views of the coastal area. The zoning for the General Plan, Redevelopment Plan and Specific Coastal Plan is being applied to retain the City's character. By tight control over new low-density uses, and maintaining significant amounts of recreation space, an upgraded and stable Redevelopment Area will provide comprehensive mitigation. 4 .1 . 3 REGIONAL PLANS A. Setting The City of Rancho Palos Verdes is situated in the southwest corner of Los Angeles County and occupies a portion (in excess of 13 square miles) of the Palos Verdes Peninsula; approximately 7 1/2 miles of the City is along the coast. The Peninsula is a dominant physical form in the Los Angeles Basin mainly due to a peak elevation of nearly 1,500 feet. The City provides a comfortable living environment with substantial recreational space, magnificent views, clean air and an abundance of vegetation and acquatic resources. Urban impacts in the area have mostly occured during the last sixty years; in the active slide area, physical limitations have significantly reduced the rate and number of development projects. While Rancho Palos Verdes is only a small segment of the regional setting of the County, it retains its own identity. In order to protect and enhance its local character and natural assets, Rancho Palos Verdes (as did Palos Verdes Estates, Rolling Hills, and Rolling Hills Estates before it) incorporated (1973) . 26 Regional land-use planning and zoning were, before incorporation, handled by Los Angeles County which too easily approved density increases which increasingly conflicted with the desire of local citizens, civic organizations and the natural environment. Local people most directly impacted by regional planning and decision-making determined that a new General Law City would provide the best opportunity for self-determination within the context of regionalism. Regional Planning in and around the City of Rancho Palos Verdes is being conducted by numerous entities; a few of these governmental agencies have broad, comprehensive r.. responsibilities while many have narrow, single-purpose missions. Comprehensive Planning is focused on the County's Regional Planning Department and the Southern "California Association of Governments (SCAG) . Area Planning Councils, which consist of local planning officials and professional planning staffs, provide sectional area input into the regional planning process of the County. Because of the need to provide a general, regional framework for local entities to do more detailed individual planning, Los Angeles County and SCAG Comprehensive planning is important to the future of Rancho Palos Verdes. General Plans at all levels provide a policy base for decision making, on a day-to-day basis, while keeping long-term goals and policies in view. Regional planning at the County level provides policy direction to revitalize older urban areas, conserve and extend the life of existing sound housing, discourage urban sprawl, conserve energy and water, protect the ecological diversity of the natural environment, promote a diversified economy able to provide expanded employment and investment opportunities, foster access to the benefits of society and use public resources more effectively. Rancho Palos Verdes is a portion of the Southwest subregion of Los Angeles County; regional policies include promoting public access to beach and shoreline areas and encouraging low-density uses and recreational uses in the Palos Verdes Hills. Growth of population for this County subregion reflects a rate of six (6) percent during the planning period - 1975 to 2000 or approximately 40,000 new residents. B. Impacts Because Regional Plans are policy and goal oriented, they provide, at best, a very general basis upon which to evaluate realistic and defined impacts on specific communities. 27 Local entities must work closely with special districts and utility companies to promote a coordinated approach to implementing locally adopted plans, programs and projects while reducing and/or eliminating adverse environmental impacts. The City' s Redevelopment Plan is consistent with Regional planning for the County and its subregions especially in the enhancement and restoration of the Palos Verdes coastal area Because the County contains more than 4,000 square miles, and most of the urban areas are under City control, regional planning specific impacts are difficult to define and measure. Regional planning is generally positive since it serves to integrate local plans. C. Mitigation w The Redevelopment Project will hasten the implementation of regional and local planning efforts. A Redevelopment program will act as a financial tool to accomplish vital improvements along an important segment of the coastline as identified in Regional planning efforts for Los Angeles County. The Regional Plan is not a mitigation document and is too general to provide a specific basis for necessary mitigation measures, however, it does establish an overall foundation for more detailed planning and implementation as contained in the Redevelopment Plan. Transportation mitigation in the Regional Plan provides for multiple use of surface circulation networks; these uses include pedestrian, bikeways and access to parking. Integrating transportation facilities with scenic resources, also, will reduce the potential for significant impacts. Since Rancho Palos Verdes is not within a Major Transportation Corridor, its primary tie to the Regional Transportation System is the arterial, Palos Verde Drive South. This facility will require upgrading and multimodal consideration. Utility companies will be provided an opportunity to place facilities below ground once land stabilization is achieved in the Redevelopment Area. Mitigation land-use policy at the Regional level includes residential densities in low categories; these residential uses are supplemented by ample areas of recreation space throughout the Redevelopment Area. 28 Regional Special Management provides for the City' s coastal zone to include Palos Verde Drive South as a scenic highway with necessary buffering for significant ecological features. Any future development in the Project Area will incorporate selective mitigation compatible with regional goals and policies as well as the natural environment. 4 .2 TRAFFIC AND CIRCULATION A. Setting Palos Verdes Drive South provides arterial ingress and egress for vehicles in the Redevelopment Area and is the -dominant circulation feature in the transportation pattern. A secondary facility, Crest Road, permits a limited northern access opportunity to a small portion of the Project Area. Except for minor local streets, the Project will not experience significant additions to its vehicular traffic facilities. Topography, vegetation, drainage and an active slide area all serve to reduce potential for expansion of the Project-Area road system. An upgrading of the existing vehicular network is necessary for basic Project Area access, utilities and safety. Non-vehicular elements of the total circulation pattern need more detail planning and the establishment of acceptable design standards: pedestrian, bicycle and equestrian. The availability of finances for necessary traffic improvements (upgrading and maintenance) will play a major role in the creation of a local priority schedule and its implementation. As the primary feature of the infrastructure system of the City, traffic circulation influences carry beyond the political boundaries of the Community; adequate interconnection with the transportation elements of other Peninsula communities and the region is essential to the future of the City. Palos Verdes Drive South divides the Redevelopment Area in an east-west direction; this road forms the City's coastal zone boundary. The coastal zone is mostly planned for open space and recreation. Since Rancho Palos Verdes is somewhat isolated, due to its natural features and location, from the dense urbanized areas of the Los Angeles region, there are no freeways nor major highways punctuating its suburban development character . 29 !II Since 1956, landslide impacts have played a substantial role in a continuous, deteriorated environment on both sides of Palos Verdes Drive South. The stabilization of the Portugese Bend and other slide areas is basic to any meaningful effort to improve traffic movement and provide an opportunity to implement the land-use projected in the Redevelopment Plan. The improvement in Project-Area traffic will be focused on making present facilities safe and useable while encouraging its .a multiple use for utilities, pedestrians and bikes. No major new vehicular arterials nor collectors are planned. Palos Verdes Transit provides the City with mass transportation in and around Rancho Palos Verdes and Rolling Hills Estates; except for holidays, it operates seven (7 ) days a week . All trips must be initated or terminated in the Cities or at one of its satellite stops. While plans have existed for more than a decade to establish a viable pedestrian, bike and equestrian travel system to serve the community and its neighboring cities, little construction progress has occured. A more stable Project environment would assist in promoting detailed Project-Area planning and implementation of circulation elements associated with 411 Palos Verdes Drive South. B. Impacts The implementation of the Redevelopment Plan will result in major" reconstruction of the present circulation and utility system; it would also provide major public improvements to stabilize the landslide area and also permit related public and private projects to be realized. Unless reliable stabilization is achieved, the City will continue to experience disruption to its daily activities and absorb unending, costly road and other infrastructure expenses. General and specific plans cannot be implemented in an atmosphere of ongoing physical deterioration to the natural environment. Projected improvements serving the Redevelopment Area include upgrading Palos Verdes Drive South; undergrounding of basic utilities; developing trails and paths to accommodate pedestrians, bikes and equestrians; added underground dewatering wells, seawalls, retaining devices, breakwaters, groins, surface drainage and erosion stabilization facilities; beach improvements; grading; landscaping and vegetation; and other needed physical improvements to achieve expected results articulated in local plans. Each improvement must be designed and implemented in a sensitive manner taking into account the resources of the area and specific mitigation. 30 Overall, expected impacts will be beneficial to permit a reliable circulation pattern and allow for an improved natural and visual environment. Maintenance expenses for the Community will decline and a framework will be established which will encourage private investment in the Redevelopment Area. New and upgraded improvements will be adequate to handle any increase in traffic as well as use of utilities, parking and recreation space. An upgraded section of Palos Verdes Drive South will complement the existing Peninsula arterial network and . S promote a better functioning vehicular circulation pattern for the coastal region. While an upgraded road facility will attract additional outside traffic, in the Project Area, the multi-purpose Palos Verdes Drive South, improved to current standards, will have the -capacity to handle the anticipated increase. Emergency vehicles and services will be able to move more quickly and safely on an upgraded circulation system; general access to coastal resources will also benefit from an improved Road. Visually, the general public will have an aesthetically pleasing Peninsula environment with an improved Road and related underground utility system. The Redevelopment Plan, as it is placed into effect, will provide a framework for a series of projects which will influence the long-term welfare of the City and the general public. These public and private developments 410 will have a variety of major and minor impacts; most of these impacts will be a long-term benefit to the City. The most significant effects will be related to natural resources since major public works will require considerable disturbance of this element of the environment. Private projects, particularly low-density residential construction, will impact the Project Area by the addition of traffic and demands for local services; however, the significance it will have on topography, vegetation and drainage will be more substantial . To the extent feasible, the adverse impacts must be off-set by measures which balance the negative effects with positive off-setting actions. Palos Verdes Drive South is an established major road and its reconstruction will require consideration of undergrounding utilities; adequate drainage; pedestrian and bike facilities; off-street parking, and landscaping. 411 31 The Project Area stabilization program will stimulate the construction of between three to five (300-500 ) 411 hundred new dwellings at lower densities; additional vehicular traffic generated from the Project Area on the road system should be between three thousand (3 ,000) and sixty five hundred (6,500) trips daily. Much of this y traffic will utilize Palos Verdes Drive South. This arterial in an improved condition will attract additional vehicular traffic; most of this added traffic E will be weekend users. Off-road parking demands will increase and should intensify during weekends. C. Mitigation Peninsula intersection improvements north of the Project Area are needed for safety as well as the smooth flow of anticipated increased vehicular traffic. Especially significant are Palos Verdes Drive North and the Pacific Coast Highway with their intersections with principal crossing and connecting streets . Mitigation must include a widening, in conformity to City street standards, of the roadway for multi-modal use of Palos Verdes Drive South and adequate landscaping amenities. A design for reconstruction of this arterial should take into consideration pedestrian and bike uses in a non-conflicting comprehensive approach. Safe and adequately designed turning lanes and crossings of Palos Verdes Drive South must be implemented to serve both sides of this road. A sterile-looking roadway needs to be avoided. In all areas of significant natural resources, any expansion of circulation development should be avoided; where permitted, such extensions must be integrated so as to have a minimum impact on established vegetation and land resources. Drainage patterns need to utilize the natural terrain and, only if absolutely necessary minor adjustments may be considered for transportation design. Streets providing direct access to present and future residential development should be designed so as to have minimum standards for a low-density environment; urban standards must be avoided. Streets should be kept to 410 32 a minimum in number and developed with non-urban standards of design. All streets should, to the maximum 411 extent possible, utilize a design which promotes undergrounding of utilities, pleasing signing; natural drainage, multi-purpose, non-conflicting, traffic (pedestrian, bicycle and equestrian) and complementary P Y landscaping. Visually compatible street furniture should be provided which includes benches near transit stops and local focal points. Where possible signing g "forest"should be combined so as not to create a forest of poles cluttering the City. Noise levels will significantly increase during construction; however, restricting the days and hours worked should mitigate impacts during evenings and weekend g s. Also, the use of equipment with low-noise producing characteristics will assist in reducing negative construction g �. g on effects. These actions should N produce a minimum of noise during construction; regardless, nearby residents and visitors to the area will experience noise which may be described as excessive and annoying. Generally, construction equipment will produce, at a distance of fifty (5 0 ) feet Community Noise Equivalent Levels between 80 dB and 90 dB; nearby residential areas will find construction noise will exceed normal daytime ambient levels. All efforts should be made to condense construction schedules and use months of off-peak traffic volumes. Before construction, specific wetting procedures should be developed to reduce dust emissions; the use of "normal" procedures may be damaging to the overall project. In order to reduce accident potential, the number and spacing of direct access driveways and curb cuts must be limited from Palos Verdes Drive South. This will assist in the smooth flow of vehicular traffic as well as provide pedestrians and bicyclists with a less congested environment . While the City's planned pedestrian and bicycle system Y y m is fully incorporated into the vehicular right-of-way network, equestrian facilities are more concentrated in the Project Area and need off-road consideration, Th e placement of equestrian trails in the Project Area, and associated facilities, need specific mitigation consideration and detailed planning before implementation. 411 33 4 . 3 LANDFORMS AND TOPOGRAPHY 411 A. Setting The Project Area has been dramatically affected by both marine and nonmarine geomorphic processes. Formation of marine terrace platforms, continental erosion and accumulation, landsliding, and coastal erosion have shaped and reshaped the land. Pleistocene age wave-cut platforms (benches) formed around the peninsula at .:_:. different levels as a result of glacial eustatic sea-level changes and uplift of the peninsula. For the -:f most part, these surfaces and related deposits have been disrupted by large landslides. These ground movements have, in turn, affected drainage patterns within the Project Area. Major drainage courses include Klondike Canyon, Paintbrush Canyon, Portuguese Canyon, Altamira Canyon, and Barkentine Canyon. These drainage courses 'extend from the ocean up to elevations of 1200 feet in the Project Area. Elevations within the Project Area range from sea level to about 1100-1200 feet along the northern margin. Physiographic features include moderately steep hillsides, particularly in the upper part of the area above elevation 500 feet, steep landslide scarps, relatively flat terrain, and depressions associated with past and active landslides. In general, "hummocky" 410 terrain describes the geologically more recent landslides (i.e. , Portuguese Bend landslide) . Some of the upper slopes are as steep as 1-1/2:1 (horizontal to vertical ) , while the Canyon flanks are locally steeper than 1: 1 (450) . Steep cliffs to heights of 100 feet above sea level are present along the southern boundary, including the two promontories - Portuguese and Inspiration Points. The natural ground surface in the Project Area has an overall slope angle of about 100, or flatter than 6 :1 . Only very limited people-made slopes were created in this area. B. Impacts Land use improvements associated with the Redevelopment Project may require expensive grading because of ground instability. Most of the Project Area remains in its natural state. During the past 30 years, urban development has been slow. C. Mitigation All grading within the Project Area must be performed in T accordance with the City of Rancho Palos Verdes Development Code. All grading and earthwork must be properly designed and accomplished in accordance with accepted civil engineering, geotechnical engineering standards, local guidelines and practice. New vegetation will soften visual impacts and help stabilization of the soil. 34 4 .4 GEOLOGY AND SOILS A. Setting The Palos Verdes Peninsula is characterized structurally 411 as a doubly-plunging anticline trending northwest-southeast that has been uplifted on the southwest side of the Palos Verdes fault since Late Pliocene. During uplift of the peninsula and with changes in sea level, marine terrace (abrasion) platforms were eroded into the flanks of the hills . The marine Middle Miocene to Early Pliocene Altamira Shale ._::... member of the Monterey Formation constitutes the exposed bedrock over most of the peninsula (Ehlig, 1982a; Conrad and Ehlig, 1982) . Surficial units that overlie the bedrock generally consist of marine sands and cobbles, and continental deposits of variable soil (sand, silt, and clay) compositions. The dominant geologic units present in the Project Area are bedrock of the Altamira Shale, landslide deposits (debris) , marine and nonmarine terrace deposits , and relatively thick accumulations of slopewash. Alluvium, talus deposits, fill, and beach deposits also exist. Bedrock is exposed in the major drainage courses, as well as at isolated outcrops in the higher terrain and in landslide blocks themselves. The Altamira Shale has recently been subdivided into the phosphatic (upper ) cherty (middle) and tuffaceous (lower ) lithofacies (Conrad and Ehlig, 1982) . Accordingly, the Project Area 411 is situated in the tuffaceous lithofacies of the formation. This subunit is characterized by interbedded tuff, siltstone, porcelanite and chert, dolostone, sandstone, shale, diatomite, and basalt (Conrad and Ehlig, 1982) . Landslide deposits cover approximately 90% of the total Project Area or equivalent to about 1,100 acres of combined land. Terrace deposits occupy the southwest and southeast corner of the area, and overlie Portuguese and Inspiration Points . The remainder of former terrace deposits within the project boundaries have been either displaced from their original positions or eroded away because of landsliding. Terrace deposits are typically less than 30 feet thick, and they consist of moderately consolidated sand, sandy silt, and clayey silt with bedrock fragments . In general, slopewash deposits have accumulated over most of the land surfaces. These characteristically stiff clayey silt and silty clay soils are usually about 3-4 feet thick, except on the steep slopes. 411 35 The regional bedrock structure in this part of the Palos Verdes peninsula is generally homoclinal (planar ) with a 411 gentle 50-200 dip (downward tilt) to the southwest, or seaward. The beds, however, have also been affected by various geologic processes such as soft-sediment deformation, basaltic intrusion, and probably Mio-Pliocene submarine (gravity) sliding, resulting in broad folds, tight folds, and small-scale contortions. Fold axes are typically oriented in an east-west direction. Bedding locally dips as steep as 700 within the eastern portion of the Project Area. No active or potentially active faults are known to be present on or project toward the subject site. The geologic structure of the southern California area is dominated by northwest-trending faults associated with the San Andreas system. Faults such as the Newport-Inglewood, the Whittier-Elsinore, the San Jacinto, and the San Andreas are the major faults of this system. They are all known to be seismically active, and the San Andreas and San Jacinto faults are know to have ruptured the ground in historic time. B. Impacts Faulting and Seismicity 411 No active faults exist at the site. The closest known active faults to the site are the Palos Verdes and Newport-Inglewood, located approximately 3 and 11 miles away, respectively. The potential for ground rupture at the site due to faulting is considered unlikely. Maximum credible ground accelerations on the order of 0 .3 - 0.6g are possible as a result of seismic activity on a nearby fault. Secondary Seismic Effects The various types of ground failures, which might occur as a consequence of severe ground shaking, include landsliding, subsidence, ground lurching, shallow ground rupture, and liquefaction. Because of the predominance of bedrock and consolidated terrace deposits present in the Project Area, although most material has been displaced by landsliding, and the distance to the nearest active fault, potential for severe ground shaking, subsidence, ground lurching and shalow ground rupture is considered very low as a result of seismic activity. Existing potentially active (prehistoric) landslides could possibly reactivate as a result of strong ground shaking, particularly if the Factor of Safety is substantially less than 1.5 (static) . Based on the general subsurface conditions, including the !II presence of ground water at about 50 feet, or lower, below the ground surface, the potential for liquefaction is considered low. 36 Liquefaction may occur in localized areas, depending on soil type, grain size, relative density, ground-water level,- degree of saturation, and both intensity and 411 duration of ground shaking. Seismically induced flooding that might be considered as a potential hazard to a site normally includes flooding due to a tsunamis (seismic sea wave ) , a seiche, or failure of a major reservoir retention structure upstream of the site. Since the Project Area is located adjacent to the Pacific Ocean, the potential exists for seismically induced flooding due to a tsunamis run-up. Landslides Most of the Project Area has been affected by landsliding. These landslides have been divided into two basic groups - active or marginally stable landslides, and potentially active (prehistoric) landslides. In general, active landslides have Factors of Safety slightly less than 1.0 (driving force equal to resisting force) . Potentially active landslides typically have calculated Factors of Safety between 1.0 and 1. 5, where 1.5 is the currently acceptable (minimum) Factor of Safety to allow for development; although such analyses are usually somewhat subjective. Movement of the large, active landslide has been slow, but relatively constant, during the reactivation period. Maximum horizontal displacement within the Portuguese Bend landslide has varied from about 430 feet to as much as 550 feet from 1956 to 1983 (Ehlig, personal communications) . Rate of movement approached 1/2 inch per day during the first 20 years, while it was on the order of one inch per day during the last several years. For comparison, after the Abalone Cove landslide propagated inland of Palos Verdes Drive South, total horizontal movement was measured at about 15 and 20 feet (maximum) at two Los Angeles County survey stations from October 1978 to August 1980 (Ehlig, 1982) . These distances are equivalent to average displacement rates of 1/4 inch to 1/3 inch per day. By 1981, movement had essentially stopped over most of the land surface of the Abalone Cove landslide (Ehlig, 1982) . Recent movement has occurred following periods of intense rainfall. Since 1981, horizontal displacement of the reactivated Klondike Canyon landslide has been quite small; and, total movement during the past, based on the exploration, has been relatively small as well. Bedrock structure and bedding conditions are nonvariable through time. Coastal erosion has probably been relatively constant, except during sporadic periods of severe storms (i.e. , January - March, 1983) . 37 Landslide material displaced into the intertidal and run-up zones is constantly subjected to wave attack and 411 erosion. It appears, therefore, that ground water plays a major role in ground movement, and such has been variable through time. It has been postulated (Robert Stone & Associates, 1982a) that movement of Klondike Canyon landslide has been related to the activity of the Portuguese Bend landslide, and to increased moisture content . Expansive Soils The bedrock materials that have potential for expansion are the siltstone, shale, and bentonitic tuff units. Topsoil rich in bentonitic clays are undoubtedly expansive. Soils derived from both bedrock and surficial deposits may be regarded as being moderately to highly expansive. Settlement The potential for settlement is expected to be minimal in fill areas within the Project Area, provided the vertical thickness of compacted fills does not exceed about 50 feet. In any case, such fill settlement is not unusual and should not adversely affect the proposed redevelopment. There is the potential for some 410 settlement of terrace deposits, slopewash, and slide debris, as a result of dewatering, where the water table is substantially lowered. Areas that may be affected by such dewatering are expected to be relatively localized. Settlement would probably occur during construction and lowering of the water table. C. Mitigation Faulting and Seismicity No special mitigation measures are considered necessary to minimize fault/seismic risk for one- and two-story wood-frame structures. Unified Building Code (UBC) and local City building codes should be followed. If taller structures are planned, site specific earthquake engineering and seismic design studies should be conducted. Secondary Seismic Effects The secondary effects of seismic activity normally considered as possible hazards to a site include several types of ground failure and induced flooding. The potential for liquefaction of the existing deposits 411 should be evaluated during subsequent studies. Possible mitigation measures include: 1) use of deep foundation systems, 2) removal and recompaction, 3) raising existing grades, 4) dewatering, 5) grouting, and 6 ) dens i f i cation of liquefiable soils. 38 Landslides Alkh Several factors contribute to instability in the Project Area, and more importantly, to continued movement of the hazardous active landslide. Landslide stabilization in the Project Area is geotechnically feasible. It is doubtful, however , that any single remedial technique would be adequate or cost-effective, especially because of subsurface interrelationships and effects that off-site conditions have on individual landslides and associated properties. To date, no all-encompassing stabilization plan has been seriously considered. Whether or not the Factors of Safety can be increased significantly to 1.5 for the entire area has yet to be determined. Limited feasibility studies are currently in progress for Portuguese Bend landslide stabilization and further Abalone Cove landslide stabilization. Such - stabilization plans should include provisions for , but not be limited to: 1) surface drainage, 2) subsurface drainage, 3) earthwork, and 4 ) shore protection. Improvement of surface drainage throughout the Project Area would probably substantially reduce the amount of rainfall and runoff that infiltrates the subsurface. Additional improvements to existing and future developed areas could consist of the following: o Installation of large-diameter RCP, CMP or concrete 411 lining in critical portions of major canyons, espectially Altamira Canyon and Portuguese Canyon; o Installation of curbs, gutters, and storm drains along paved streets; o Sealing all cracks and filling low-lying areas to create positive runoff; and o Construction of other appropriate drainage devices on sloping terrain. There is probably no simple procedure to stabilize the Project Area solely by earthwork, or even in combination with other remedial work (i.e. , dewatering, correcting surface drainage, etc. ) The most cost-effective type of earthwork may vary from minor regrading to massive earth/reinforced structures, and from location to location within the entire Project Area. Conventional landslide stabilization traditionally involves cutting and filling by unloading the head (reducing the driving force) , loading the toe (increasing the resisting force) , and construction of buttress and shear key fills (decreasing the driving force) by 9 interru p tin the slide surface and adding higher-strength material. Considering the general geologic conditions in the Project Area, and extrapolating data provided by Moore & Taber (lass and Eagen, 1982) , such massive earthwork could exceed a total volume of 30 million cubic yards of 39 material. During this type of remedial construction, temporary ground support is often needed for the deep 411 excavations. It should be realized that in some instances, due to grade changes, stabilization in one area may adversely affect existing stability in another area. As indicated by Robert Stone & Associated (1980a) , the addition of material (fill ) anywhere onto the Abalone Cove landslide, except at the toe, would tend to t increase the driving force owing to the generally planar slide surface. In contrast, adding and/or redistributing material within the Portuguese Bend landslide could have positive effects on portions of this slide and the entire mass as well. Besides the aforementioned conditions, consideration should be given to the following in the design and implementation of both temporary and permanent ground support: M 1 Land redistribution (permanent) o Buttress/shear key construction, with lime or cement treatment as needed (permanent) o Reinforced earth structures (permanent ) o Conventional retaining walls, with tiebacks as 411 needed (permanent) o Crib walls (permanent) o Chemical grouting (temporary, permanent ) As a result of possible remedial earthwork, in conjunction with one or more of the above, graded slopes may be created. To reduce the potential for erosion and surficial instablity, slope angles and slope heights should be minimized where possible. Factors which can influence surficial stability include soil type, slope angle, slope orientation, potential for loss of cohesion, and landscape watering. Flow over graded slopes should be avoided. Slopes should be planted and maintained to retard erosion and reduce the potential for surficial distress during periods of heavy or prolonged rainfall. Rodent activity should be prevented because such activity loosens the surficial soils and provides avenues for water infiltration during heavy rains. In addition, landscape watering should be kept to the minimum which sustains plant growth. A knowledgeable landscape architect should be consulted to provide additional input regarding vegetation types and needs. 410 40 ,, ,, . 9 , , ,. redçvelopment A /1 '^ • I �' legend . �- ---_ _` �_- v r � � .' \ \ ....•.. ABALONE COVE• LANDSLIDE f :,•� i l. . -. 7.,.. . l ; air •:::::; .."•�«�:»• PORTUGUESE BEND `,�- ,_,• .;Z s•••••.%iSw ;% ' ‘ L1OE �•►.ri: ..•..• ,Jçç : ♦ / i I ••� I ,.;' ••• .• •••.••% :, „-- .•' • \ '••t.•• .5%. -%. .% r{•r. .••�•r f • ••c=•--j — . :kW C.A.'f:e• .▪ KLONDIKE CANYON 4....,. `...d it.. - . ; 't .;,'. ;::::... =N=• '=. LANDSLIDE I Vifi . :• . bilt�rti •;:i ;:•. r, •4c;ntge • s• PACIFIC MAN '4_/ urban futures sept 84 N ( ‘) 0 Goo T 400o . 1 , 161Pilliii=1...1=1 400 1000 3200 1--,.lam rancho verdes ..._,................_________________. RPV SLIDE AREA Removal of landslide debris along the shoreline 411 contributes to continued instability. This condition may be reduced or eliminated by appropriate shore protection. Although some (interim) protection could be provided during the initial stage of redevelopment, it may be necessary to stop landslide movement completely before any final (ultimate) structures are constructed. Shoreline structures which may be feasible, and should be considered, include: 1 ) stone revetments, 2) sea walls, 3) breakwaters, 4 ) groins, 5) people-made reefs, or 6 ) a combination thereof. Expansive Soils Potential for expansivity should be checked by laboratory tests during subsequent studies. Possible mitigation measures include the use of post-tensioned �� slabs-on-grade and properly designed conventional F- foundation systems. Settlement The potential for settlement of the existing deposits should be evaluated. Potentially compressible soil (e.g. , slopewash, terrace deposits, etc. ) deposits in planned fill areas should be explored and evaluated 411 during subsequent studies. Thicket fill areas should be constructed early in the grading operation to minimize post-grading settlement, although most settlement is expected to occur during grading. Areas with high settlement potential could be surcharged, or deeper foundation systems could be used. An additional mitigation measure could consist of installation of survey monuments on the fill surface to provide a means to monitor and evaluate any settlement. 4.5 HYDROLOGY 4 .5.1 GROUND WATER QUALITY/QUANTITY A. Setting Groundwater is known to exist at relatively shallow depths throughout the lower, or seaward, half of the Project Area. Limited groundwater data was obtained in the Abalone Cove and surrounding areas during the late 1960's, primarily by Moore & Taber . Considerably more information was gathered by Robert Stone & Associates in this area, following reactivation of the Abalone Cove landslide. Somewhat unreliable and limited data exists relative to groundwater levels within the Portuguese Bend landslide area based on exploration conducted by 410 several investigators in the late 1950's and 1960 's. No subsurface exploration nor groundwater monitoring have taken place in the latter area since that time. Groundwater information was acquired in the Klondike Canyon landslide area and near the eastern edge of the Portuguese Bend landslide by Moore & Taber as recently as 1981. 42 Based on available data, free ground water was between 40 and 120 feet below the ground surface of the Portuguese Bend landslide in the late 1960's . Depth to groundwater was, and is apparently now, quite variable 410 owing to the irregular shape of the landslide terrain. Three closed depressions within the slide mass, including "Lake Ishibashi" and the graben near the main head scarp, have had permanent levels of ponded water . These levels, for the most part, probably reflect actual phreatic surfaces, and, such levels would be compatible with the previous data. As indicated by Yonder Linden and Lindvall (1982) , the water table has risen some jf 30-60 feet in the northern part of the Portuguese Bend landslide since reactivation in 1956 . This higher level would also be consistent with the aforementioned conditions. Based on the apparent groundwater table elevations, such a surface would vary from 20 to 100 feet above the basal slide plane. The study performed by Robert Stone & Associates (1979a) revealed groundwater was about 40 feet, on the average, above the base of the Abalone Cove landslide (Ehlig, 1982) . Depth to the water table varied between about 50 and 100 feet below the ground surface north, or landward, of Palos Verdes Drive South. Localized seepage is evident along the base of the bluff in Abalone Cove. Several methods for dewatering the slide mass by lowering the water table were considered by Robert Stone & Associates (1979a; Ehlig and Bean, 1982) . Installation of vertical wells was ultimately recommended. By 1981, a system of 7 dewatering wells and 6 monitoring wells was in full operation. By August 1981, groundwater levels in the vicinity of the production wells had been lowered from 15 to 35 feet below the pre-dewatering levels of 1980 (Robert Stone & Associates, 1981d) . As of January 1982, a total of about 70 million gallons of water had been removed, at an average rate of approximately 100,000 gallons per day (Ehlig and Bean, 1982) . All groundwater pumped to the surface is piped to the ocean. Water quality is apparently quite poor (Ehlig, personal communication) . During subsurface exploration conducted by Moore & Taber (1981; Kerwin, 1982) near the beach immediately east of the toe of the Portuguese Bend landslide, an artesian groundwater condition was encountered. Groundwater was first noted at a depth of approximately 66 feet, or at about elevation -54 feet. Initially, the water flow rate was recorded at 150 gallons per minute. A dewatering well was, therefore, installed at that location. By February 1982, the flow rate decreased to a relatively constant 19 gallons per minute (Kerwin, 1982) . This water is routed to the Ocean. Chemical analyses of water sampled revealed sulfate, bicarbonate, magnesium, and iron contents. 43 B. Impacts Based on the Abalone Cove landslide dewatering program and statistical data gathered regarding ground movement and water levels, it is evident that the height of groundwater within the active landslide is the principal factor controlling stability of these slides. This appears to be applicable only in the southern two-thirds of the Project Area. Where groundwater lies at or above the slide plane, it tends to have multiple affects on the slide mass and to decrease stability. C. Mitigation To minimize these adverse affects, lowering of the water table in the landslide is essential. This can be accomplished by either passive or active dewatering systems. Among the more conventional systems are wells and pumps (active) , and near-horizontal drains (passive) . A rather specialized technique, typically used only on large dewatering projects, is a (passive) system of separate or interconnected water tunnels. One system, or a combination of different systems, could prove to be most effective, depending on location and specific conditions present. In general, upslope areas will also benefit from such 410 dewatering . Stability should be increased in the vicinity of those areas by lowered water levels. The potential for landslide reactivation in areas above the active landslide should be decreased as a result of dewatering and downslope stabilization. Some localized settlement may occur as a result of dewatering. Areas most susceptible to such settlement should be explored and evaluated during subsequent studies. 44 4 .5 . 2 SURFACE WATER A. Setting Quantity 411 Surface water in the Project Area occurs primarily as streamfiow. The Project Area lies within parts of four separate watersheds in the City of Rancho Palos Verdes. There are five (5) major drainage flows and one (1) minor drainage flow, according to the Rancho Palos Verdes General Plan. These flows occur in the western drainages as ephemeral or intermittant streams that do not flow year round but only during wet seasons. These streams lie within 50 to 75 feet deep drainage canyons and are fed by rainwater runoff. At least one spring was found within the Project Area, feeding an intermittant stream in the westernmost drainage in the Project Area. The drainages in the eastern part of the area have been disrupted so extensively by the landslides that they no longer drain to the sea. Only some runoff flows to the ocean with most being trapped in depressions and temporary ponds. This contributes to the landslide problem by introducing water into the sliding mass. The proposed Redevelopment seeks to restore positive drainage in these disturbed drainages in the eastern part of the Project Area. 110 In general, the watercourses in the Project Area can experience substantial flows because of the size of the watersheds (less than 1 square mile) and the average annual rainfall of 11" to 15" per year . Some studies have been conducted that give the general range of stream flows during various storms, for certain drainages in or near the Project Area. Those figures are given below. WATER RUNOFF VOLUMES Location Storm Frequency ,1 year 5 year 25 year 50 year Altamira Canyon at 282 cfs 498 cfs 700 cfs 991 cfs Upper Altamira Rd* Deadman 's Canyon** --- --- 666 c f s --- * L.A. Co. Flood Control District, Altamira Canyon Drainage Study., 1980. `r ** Sikand Engineering Associates, Final EIR No. 15, 1979. 411 45 Assuming that these drainages are typical of the western 411 part of the Project Area, it can be seen that the peak discharges can be substantial during rainy periods. The discharge is higher than would normally be expected given the relatively small sizes of the watersheds (less than 1 square mile) ; however , because of the clayey soils and urbanization upstream, which result in low percolation and high runoff rates, rainstorms generate surprisingly high discharges in the Project Area drainages. In addition to the surface streamflows, there is a quarter acre freshwater lake in the southeastern portion ,y of the Project Area. This lake was recently created by the landslide and is fed by groundwater . Quality No data is available on the quality of water in the natural surface watercourses in the Project Area. However , because of the disturbed nature of the vegetative cover and the existing urbanization upstream, it is expected that relatively high levels of silt and moderate amounts of urban runoff ( i .e. , oils, grease, pesticides, organic matter , fertilizer nutrients ) would be found in the surface water . These pollutants are particularly harmful to intertidal and subtidal II! organisms. The erosion of the landslide by the Ocean also creates a substantial amount of silt, which can be seen in a plume at the base of the bluffs. This additional erosion caused by the earth movement also detracts from the quality of the marine environment by interfering with bottom dwelling and filter feeding organisms. B. Impact Quantity The development of drainage channels and the potential urbanization of the area will increase the peak storm discharges in the watercourses by increasing the rate of runoff; however, this increase will not be significant becauses of the very high runoff rate under natural conditions where clayey soils occur . Studies for previously proposed developments in or near the Project Area (L.A. County Flood Control District, 1980; Sikand Engineering Associates, 1979) have projected an increase in peak discharges of around 45% which is relatively 411 46 minor compared to a more typical increase in peak discharge of 50-100% under low density conditions (Dunne and Leopold, pg 328) . Therefore, it is expected that 110 there will not be a significant impact on peak discharges as a result of the Project. The dewatering activities will result in the draining of Ishibashi Lake. This freshwater lake is a recent and unnatural habitat and the impacts on vegetation and wildlife are discussed under the other Sections of this environmental document. Water Quality The stabilization of landslide and the establishment of a more dense vegetative cover will reduce the sediment production from the Project Area. This will have a positive effect on ocean biota that are adversely affected by high turbidity and sedimentation. In the short-run, however, the construction activities related to the Plan will cause the potential for severe erosion and sedimentation. This erosion, however , would be small in comparison to the erosion into the ocean created daily by the slide. Careful construction and grading practices can minimize the manmade production of sediment caused by construction activities. The development that may occur after the land is stabilized will result in higher levels of storm runoff 411 that typically contains organic matter , oils, pesticides, fertilizer, and grease. These additional materials could cause problems in the intertidal zone and drainage courses. C. Mitigation * Control short term erosion from construction through the use of erosion control measures including, but not limited to, the diversion of runoff to settling ponds, wet weather work restrictions, rapid revegetation, mulching and other necessary measures. 411 47 411 * - Control urban runoff pollution through a regular program of street sweeping, public education, and if necessary the diversion and treatment of runoff. 48 4 .6 VEGETATION AND WILDLIFE A. Setting The Project Area's vegetational and wildlife regime is not uniform throughout but has several recognizable areas where distinctive communities of plants and animals exist. Basically, the overall site consists of a combination of the following distinct Habitat Areas: AREA DESCRIPTION A Sturdy Coastal Sage Scrub/Chaparral B Disturbed Coastal Sage Scrub/Chaparral C Agricultural Land/Agricultural Vegetation D Residential Land Use/Ornamental Vegetation E Disturbed Ocean Bluff Sage/Strand F Marine Intertidal/Offshore Communities These individual Habitat Areas were identified as a result of several site investigations by qualified biologists . The Habitat Areas concept was developed in order to enable a more focused and understandable discussion of this large and diverse site. In addition, 410 certain of the proposed activities of this project will be restricted to localized regions of the site and will only affect limited portions of certain Habitat Areas, and not the whole site. Refer to the following map for Habitat Areas. The following discussion briefly describes each Habitat Area: Habitat Area A. Sturdy Coastal Sage Scrub/Chaparral - Thi s Area is located in the northwestern portion of the site. It is a hilly section dominated by steep canyons that drain into scattered lower residential sectors. Numerous past and present disturbances (such as brushfires, fire prevention practices, nearby urbanization, and graded dirt roads) have encouraged the influx of many alien and weedy plant species. Despite this influx, there remains a sturdy assemblage of native plant and animal species common to the Coastal Sage Scrub and Chaparral communities. Some of the native plants are intermixed with the weedy and ornamental species, yet there are numerous dense stands of pure native flora. The native vegetation present in this Habitat Area represents a valuable habitat for numerous species of reptiles, birds, mammals and insects (See 411 Table on species list) , and gives much of the area outstanding natural watershed capacity. 49 Habitat Area B. Disturbed Coastal Sage Scrub/Chaparral - This Habitat Area is located mainly in the northeastern portion of the site and extends south along the site's eastern border . The ground has been broken and moved as a result of the landslide activities. The soil has experienced severe erosion over more than a third of the Area, and several large, new arroyos have developed because of the constantly changing topography. Because of continued ground slippage and soil erosion, the native plant and animal associations are rare and very broken in their distribution pattern. Occasional representatives of the Coastal Sage Scrub/Chaparral community are most often present in a jumbled assortment of weedy alien, and escaped ornamental plant species. The highly limited and rare occurance of native plant species representing the Coastal Sage scrub/Chaparral _attests to the magnitude of the slide-related 0 disturbances in the Habitat Area (Coastal Sage Scrub is a well known colonizer of disturbed roadside and cultivated sites, and usually does well if disturbances are not frequent) . Based on site investigations of this Habitat Area, there is little value to be considered at this location. Habitat Area C. A• ricultural Land - This Habitat Area is located in the southeastern portion of the site, north of Palos Verdes Drive and is dominated by cultivated farming. A few alien weedy species and escaped ornamental plants are surviving between the narrow fringes of the cultivated plots. There is a natural seep lake near the highway, sometimes referred to as Ishibashi Lake. Ishibashi Lake is relatively recent (since about 1980) ; it appears to have developed as a result of the landslide activities, changing topography, poor surface drainage, and high water table in the vicinity of the Lake. Habitat Area D. Residential Land Use - This is the largest of the Habitat Areas and is centrally located north of Palos Verdes Drive. It can be described as a combination of residential areas and highly modified open areas. The vegetation here is mainly ornamental and is maintained by the property owners . 410 r.• 50 111' ANIMAL SURVEY - RANCHO PALOS VERDES REDEVELOPMENT EIR Although much of the Project Area is in disturbed condition, the relatively intact portions of the Coastal Sage scrub Community in selected locations should provide valuable habitat for many characteristic species of vertebrate animals. The below table provides a listing of characteristic reptiles, birds, and mammals sighted or expected to be present given the established vegetation a of the area. This data made it possible to produce hypothetical lists of those animals known to occur in this area. This list does not include animals of the coastal strand and intertidal communities. None of the vertebrate animals listed is classed as rare or endangered. J *Vertebrate Animals Observed, Indicated, or Expected to occur within the Rancho Palos Verdes Redevelopment Site: Common Name Scientific Name Reptiles Alligator Lizard Gerrhonotus multicarinat Common King Snake Lampro2eltis getulus Gopher Snake* Pituophis melanoleucus Side-blotched Lizard Uta stansburiana Western Fence Lizard* Sceloporus occidentalis Western Rattlesnake Crotalus viridis Birds American Kestrel* Falco sparvarius Anna' s Hummingbird Calypte anna Brown Towhee Pipilip fuscus Bushtit Psaltriparus minimus California Quail* Lophortyx californicus Common Raven* Corvus corax Domestic Pigeon Columba livia House Finch* C_arpodacus mexicanus Lesser Goldfinch Spinus psaltria Mockingbird* Mimus polyglottos Mourning Dove* Zenaida macoura Peacock* Pavo cristatus Red-tailed Hawk* Buteo jamaicensis Ring-necked Pheasant Phasianus colchicus Rufous Hummingbird Selasphorus rufous Scrub Jay Aphelocoma Coerulescens J Song Sparrow Melospiza melodic 411 51 410 Common Name Scientific Name Birds . Sparrow Hawk* Falco sparverius Starling Sturnus vulgaris Turkey Vulture* Cathartes aura Western Meadowlark Sturnella neglecta White-tailed Kite Elanus leucurus Yellow-romped Warbler Dendroica coronata mammals Audubon Cottontail* Sylvilagus auduboni Black-tailed Hare Lepus californicus Botta Pocket Gopher Thomomys bottae Brown Rat Rattus rattus California Ground Squirrel* Spermophilus beecheyi California Meadow Mouse Microtus californicus Coyote Canis latrans Deer Mouse Peromscus maniculatus Harvest Mouse Reithrodontomys megalotis House Mouse Mus musculus Opossum Didelphis marsupiahs Racoon . Procyon Lotor Striped Skunk Mephitis mephitus Western Skunk Eumeces skiltonius SPECIAL NOTATION: Dr . Richard A. Arnold (Dept of Entomology-Univ. Calif. Berkeley) has been involved in extensive field studies relative to the endangered Palos Verdes Blue Butterfly, Glaucopsyche lyodamus palosverdensis . In a series of two somewhat extensive walkthroughs of the survey area no specimens of the Palos Verdes Blue Butterfly's prime foodplant Astragalus trichopodus ssp. leucopsis,, were observed. The time of year may have limited the presence of Astrogalus. The Astragalus is mentioned in the previous vascular plant species listing based upon Dr. Arnold's notation that this plant has previously and infrequently been observed in the past. No sightings of the Palos Verdes Blue Butterfly were seen on any of the flowering leguminous secondary foodplants noted by Dr . Arnold. 52 VASCULAR PLANTS 411 The vascular plants surveyed in the general survey area have been listed. The list does not include plants representing the coastal strand and intertidal communities. Two transected walkthroughs were conducted by Mark W. Parratt and Tom Morris in late August, 1984 . At the time of the survey few plants were flowering or active, but several t .. identifications of spring-blooming plants was possible from fragmentary materials observed. None of the plant species within the survey area is classified as rare or endangered. Species Common Name Native Abundance* Acacia -longifolia Broadleaf Acacia C Alyssum mar i tina Sweet Alyssum I Anaranthus sp. Pigweed I Ambrosia psilostachya Western Ragweed X I var . californica Artemesia californica California Sagebrush X D Atriplex lentiformis Saltbush C Atriplex semibaccata Australian Saltbush C Astragalus tricopodus So Calif. Locoweed X I ssp. leucopsis Avena barbata Slender Wild Oats C 0 Avena fatua Wild Oats C Baccharis glutinosa Hulefat X I Baccharis pilularis Coyote Bush X C B_assica_nigra Black Mustard C Bronus rubens Red Brone C Carpobrotus edulis Hottentot Fig I Capaella bursa- Shephard's Purse I e pastoris Ceanothus soinosus Greenbark Ceanothus X I Centaurea selitensis Star Thistle �! I Chaenactis Chaenactis X C glabriuscula Chenopodium alba Lamb's Quarters C Convolvulus arvensis Wild Morning Glory I Cortaderia selloana Pampus Grass I Croton californica California Croton X I Elymus condensatus Giant Wild Rye X C Encelia californica California Encelia X C a.. Eremocarpus setigeris Dove Weed X I Erigonum fasciculatum California Buckwheat X C Erodium botrys Large Storkbill C Eucalyptus sp. Eucalyptus C Foeniculum vulgare Sweet Fennel C *D = dominant C = common I = infrequent III 53 Species Common Name Native Abundance* 411 Gnaphalium bicolor Everlasting X C Gnaphalium californicum Calif. Everlasting X I Haplopappus palneri , Palmer 's Goldenbush X I ssp. pachylepis Haplopappus venetus Coast Goldenbush X D ssp. vernonoides Heteromeles arbutifolia Toyon X I Heterotheca grandiflora Telegraph Weed X C - Isomer is arborea Bladderpod X I var . arborea Lotus sceparius Deerweed X I Malva parviflora Cheeseweed C March macrocarpus Manroot X I Marrubium vulgare Horehound C Me l i lotus albus White Sweet Clover C Myopor am laetum Myoporum I Nicotiana glauca Tree Tobacco C Opunta littoralis Coastal Tuna Cactus X C Opuntia prolifera Coastal Cane Cholla X I Pinus canariensis Canary Isl. Pine I Raphanus sativus Wild Radish I Rhus integrifolia Lemonadeberry X D Rhus laurina Laurel Sumac X I Riccinus cummunis Castorbean C Rumex crispus Curly Dock I Salix goodingii, Black Willow X I var . goodingii Salsola iberica Russian Thistle C Salvia apiana White Sage X I Sambucus mexicana Blue Elderberry X I Schinus molle Peruvian Peppertree I Silybum marianum Milk Thistle C Sisymbrium of f icinale Hedge Mustard I Sonchus oleraceus Sowthistle I Stellaria media Common Chickweed I Stipa pulchra Needlegrass X I Typha latiofolia Cattail X I Xentium strumarium Cocklebur I var . canadense *D = dominant C = common I = infrequent ID 54 Habitat Area E. Coastal Bluff/Strand Communities - This Habitat Area lies between Palos Verdes Drive South and the base of the coastal bluffs. The vegetation here consists of a few native species from the Coastal Sage Scrub and Coastal Strand communities. The terrain is highly modified and broken as a result of landslide activities. In addition, the coastal bluffs are crisscrossed with numerous foot paths leading from the highway to the beach. Habitat Area F. Marine Intertidal and Offshore Communites - This Habitat Area is located from the base of the coastal bluffs, seaward and includes the Beach, Intertidal, and Offshore Kelp Forest Habitats. The coastline of the site consists mostly of cobblestone beaches, with intermittent pebbly and sand beaches. Two "prominent points (Portuguese Point, and Inspiration =- Point) are surrounded by large adjacent rocky reefs which extend as far as two hundred (200) feet into the ocean beyond the base of the bluff. Dense stands of Giant Kelp are located nearby along the length of the site coastline. Coastline surveys by biologists revealed that marine life was least abundant on cobbly, pebbly , and sandy beaches; and was most abundant on rocky reefs and in offshore kelp forests. Occasionally, cobble beaches can support rich assemblages of marine invertebrates including flatworms, crabs, barnacles, snails, octopuses and a host of other kinds of animals. Usually evidence of there presence can be found on the underside of large intertidal cobbles. However, no evidence of epifaunal (rock surface dwellers) establishments was seen on a sampling of cobbles on all site beaches. Nor was there any other evidence to suggest the presence of plant or invertebrate communities in these locations. Pebble and sand beaches are less likely candidates to support a rich biota, and no marine plants or animals were observed on these beaches within the site. The more dense occurence of marine life was on the rocky reefs of Portuguese Point and Inspiration Point. The reefs which form a sort of apron around each point support tidepool and intertidal communities of intertidal marine algae and invertebrates (See Species List) which is relatively rich yet of somewhat low diversity. The reefs are frequently disturbed by sports fishermen whose foot traffic and collection activities could impose continual strain on these areas. Based on the Project Description, no construction activities are planned on or near rocky habitats . !II 55 r :X ;. tit .._ redevelopment p ro ¢ct A: WELL ESTABLISHED, RICH CHAPARRAL B: CHAPARRAL WHICH HAS ••�•••�•••••••••••• ,••••.•.•.,. ,••••••••• BEEN DISTURBED BY � ••••' ,•••'�SLIDE AND "••� ••••• ••••••••HUMAN ACTIVITY ••••••• ••••••••• ••--s:•••••••..••••• ••••••••••••••••••••• •••••••••••••••• •••••••••••••••••••••• ,7 ••••��•,•�•.�S'A••••••••••• ••••♦•••••••♦♦•��••••• ••'•"•••••••• C: AGRICULTURAL USE ..;..;..;•.;•.;•.;•.;•;•;,.•• •• •••••••• ' •.............• /'••••••.• v < 7 :, •••••• •••••♦ I, % i ., i a`,>A` '< < '4, , 7 J 7 D: RESIDENTIAL, WITH ••• i. ,4'%,.,,,•'� 4 DOMINANT EXOTIC •• >� �� A 1 w ,( ORNAMENTAL %=: /�i� %•�,%- 4 !,; � i j j'i /-■I , ', V i LANDSCAPING '4, D� '' / ; ,� i ./�/ice - / :�� E: DISTURBED COASTAL // / / / �� BLUFF #....� _ _ .,�� ;.i ��� ,* \�,;■ >A d // / C r t q d : F: (NOT SHOWN): BEACH, •.;�. . /�i� � , �• A' A J INTERTIDAL AND %7 OFFSHORE HABITATS 1 '' 1 , . ._. .9..,,k41,..A420, . , 7 *'r"-- . X.,,,-.-,,7.. *z!:Zt- ( -. -`,` ! ._. r. . ,` - La, PAC WC •ttiw ` V urban futures s•pt S4 M 1--) • No 2400 �000 - 1900 Ul ON HABITAT AREAS rancho p alo s verdes Another relatively rich marine-life resource is found in the Giant Kelp forests located offshore. These were not 411 surveyed as part of this EIR but it is assumed that they are valuable natural resources, and important sport and commercial fishing areas. Special Note on Rare and Endangered Species - The presence of the endangered Palos Verdes Blue Butterfly, Glaucopsyche lyodamus palosverdesensis is well documented on the Palos Verdes Peninsula. Surveys performed by Richard Arnold, Ph.D. (Palos Verdes Blue Butterfly Management Plan, Draft) have identified several butterfly colonies, some of which occur within the Project Area. In a series of two extensive site surveys by biologists conducted in early September 1984, no specimens of the Palos Verdes Blue Butterfly's prime food plant, Astragalus trichopodus ssp. leucopsis were observed, nor were any of the butterflies seen primarily F- since this is not the time of year for such sightings . B. Impact The most severe adverse impacts from the proposed projects will result from earth movement activities . The locations of proposed earth moving activities coincides with areas of greatest ecological disturbance of habitat (Habitat Areas B,C,D, and E) . Even considering the high degree of disturbance which already exists in these locations, the environmental impact on vegetation and wildlife for the area as a whole generally will be significant. Earth moving activities will result in the loss of vegetation in areas graded. This, in turn will result in the elimination of valuable food sources and protective habitats for numerous birds, reptiles, mammals and valuable insects. In addition, the project calls for plans to drain Ishibashi Lake. The size of Ishibashi Lake is only about a quarter of an acre, and it appears to have been developed as a direct result of the landslide; it is a new habitat, the loss of which will not be significant. An important secondary impact which could result from earth moving activities is the short term addition of silt to the adjacent marine environment. Silt would result from storm runoff of freshly carved earth devoid of vegetation and would be carried into the ocean. There the silt would increase the local turbidity of coastal waters which already has a significant impact on -v intertidal and offshore marine life. 410 57 It is not expected that the construction of seawalls or rock revetments will have significant effects on marine vegetation or wildlife. However , until final plans are 411 established, it must be assumed that significant impacts to marine resources are possible, especially in the vicinity of rocky reef communities. It is expected that the construction of concrete-lined channels throughout the site could have a significant impact on well-established riparian, chaparral and scrub communities where such communities are present in .._.; existing channel bottoms. Dewatering wells which are proposed to be installed at various widespread locations throughout the site could result in a lowering of the water table below depths achievable by deep-rooted Coastal Sage Scrub/Chaparral trees. The magnitude of this impact cannot be fully °-�- assessed until final geotechnical surveys are completed M and final dewatering plans are developed. Various upland earthmoving and construction activities could impact localized colonies of Palos Verdes Blue Butterfly. Regardless of the fact that no colonies of this endangered insect are known to currently exist in the location of major earthmoving, it must be assumed that: 1) a more thorough site investigation could discover small, isolated colonies; and 2) between now and the time actual construction begins, new colonies could become established in the various project areas. Therefore, the potential for impact on this sensitive insect is high, and appropriate mitigation procedures should be followed to ensure that actual impacts are minimized or eliminated. In addition, colonies of the butterfly have been identified by Dr . Richard Arnold in locations of the Project Area where very little disturbance is proposed; however , until final plans are developed, it must be assumed that the potential for impact on these possible colonies as a result of the project remains high. Unavoidable adverse impacts include the fact that certain communities of native vegetation and wildlife will be, disturbed, displaced or completely eliminated where earthmoving activities are proposed. Where the installation of lined channels are proposed, channel bed vegetation and wildlife will be eliminated. In addition, because of the presence of perched groundwater in hillside channels, the installation of lined channels and dewatering wells in these areas could eliminate an important source of drinking water for hillside wildlife. The construction of seawalls will result in the elimination of beaches. This is not expected to have a significant impact on wildlife, considering the paucity of life which currently uses beach habitats in the Project Area. 58 Highly significant cummultive impacts would result if individuals or colonies of the Palos Verdes Blue Butterfly are disturbed as a result of the Project. The successful stabilization of the Portuguese Bend Landslide could result in important growth inducing impacts on vegetation and wildlife as a result of the growth of residential developments within the project site. Construction of additional housing will result in the elimination of valuable natural habitat and resident wildlife community because current zoning and General Plan designations would permit low density residential development in the valuable habitat areas. In addition, increased human activity in the areas surrounding dwellings will result in frequent disturbances of natural habitat. The stabilization of coastal bluffs through the use of seawalls could result in greater ease F-4- of access to sandy beaches and rocky reefs. Increased foot traffic on rocky reefs will incrementally increase the magnitude of continual disturbance of marine intertidal organisms in these areas C. Mitigation In order to eliminate or minimize impacts to vegetation and wildlife, and in order to offset unavoidable impacts, the following mitigation activities should be performed. 1 . All earth moving activities be restricted to the areas where it is absolutely necessary. No earth moving activities will occur in Habitat Area A, except for the purpose of installing lined channels. 2 . Erosion control and silt containment practices should be implemented during all earth moving activities in order to prevent unnecessary addition of silt to adjacent marine habitats 3 . After earth moving activities are completed, the exposed soil should be re-seeded/re-planted with species of natural Coastal Sage Scrub/Chaparral vegetation. These species can withstand the dry southern California climate, provide excellent soil stability control, and provide natural food and shelter resources for natural wildlife. 59 4. Once final dewatering plans are developed, they should be carefully evaluated in order to assess the potential impact that a drop in groundwater could have on deep-rooted trees in the project site. Dewatering wells should be placed underground. 5. Once final seawall and rock revetment plans are developed, they should be carefully evaluated in order to ensure that their construction will not significantly impact intertidal or offshore marine communities. 6 . Once final plans are developed for the construction of channels at various site locations, they should be carefully evaluated to ensure that their construction will not significantly impact natural Coastal Sage Scrub/Chaparral habitats in their vicinity. 7. The vegetation and wildlife survey performed herein was not exhaustive and only provides basic information as to the generalized biotic regime of the project site; it is neither exhaustive nor necessarily complete. Therefore, before any construction begins or is approved, for any portion of the project, detailed and exhaustive site surveys for each respective construction area shall be performed by a qualified biologist in order to ensure that impacts on vegetation and wildlife are minimized, eliminated or otherwise properly mitigated. 8. Detailed surveys shall be performed for various construction areas for the specific purpose of finding evidence of the presence of the endangered Palos Verdes Blue Butterfly or its principal food sources. Surveys shall be performed only during seasons where the butterfly and its food source are active in the environment. 9 . Impacts upon individual or colonies of the Palos Verdes Blue Butterfly shall be avoided. If any impacts appear to be likely relocation or other proper mitigation measures should be taken. 60 OBSERVED MARINE ORGANISMS IN ROCKY INTERTIDAL ON PORTUGUESE POINT AND INSPIRATION POINT SPECIES COMMON NAME Marine plants Macrocystis pyrifera Giant Kelp Eoreoia laevioata Feather Boa Kelp Plocamium coccineum Braided Hair Alga Corallina officianalis Small Coral Marine Animals Protothaca staminea Rock Cockle Saxidomus nuttalli Washington Clam Penitella penita Boring Clam Pseudochama exogyra Rock Clam Mytilus californianus Mussel Nuttalina californica Chiton Teoula funebralis Turban Snail Haliotis cracherodii Black Abalone Serpulorbis squamigerus Tube Snail Collisella scabra Limpet Collisella digitalis Limpet Notoacmea fenestrata Limpet Littorina scutulata Periwinkle Littorina plans, x;s Periwinkle Balanus glandula Acorn Barnacle Cthamalus fissus Barnacle Pagurus samuelis Hermit Crab Pachygrapsus crassipes Lined Shore Crab Anthopleura xanthogrammica Grian Green Anenome } 61 4 .7 CULTURAL AND ARCHAEOLOGICAL RESOURCES A. Setting The site is located within the territory once occupied by the Gabrielino Indians (after the Mission San Gabriel) . The Gabrielinos was the tribe present in the area at the time of the first European contact (by Cabrillo in 1542) and had inhabited the region since about 700 A.D. Currently, there are no known cultural ^ I resource localities in the proposed work areas. However , the general vicinity was subject to relatively intense prehistoric activity, and numerous localities are located in surrounding areas of the Palos Verdes Peninsula. The City of Rancho Palos Verdes has determined that the site may possess significant archaeological and paleontological resources, and has designated the area with an overlay Control District. More specific information is on file with the Environmental Services Department of the City. B. Impact While no prehistoric or historic archaeological or paleontological artifact localities are currently known to exist in construction areas, there is still a possibility that buried or otherwise obscured deposits do exist . Since there are many cultural resource sites in the vicinity, the likelihood of impact on as yet undiscovered resources is possible. C. Mitigation In order to prevent unnecessary impacts upon cultural resources as a result of the proposed Project, the following mitigation should be implemented: 1. Detailed surveys of construction sites should be performed by qualified archaeologists/paleontologists in order to reliably assess the presence of cultural resources. 2. Qualified archaeologists/paleontologists shall conduct periodic monitoring of grading and major earth moving activities. This monitoring activity should meet requirements of the National Historic Preservation Act. I 62 4 .8 SOCIAL !II The Project Area has existed for many years as a highly desirable and scenic section of the Peninsula and Region; however , physical deterioration of this coastal resource has had substantial negative affects on daily activities of residents as well as visitors. Residential dwellings in the Area, because of safety hazards due to an active slide, have been reduced in number and neighborhood living patterns have been considerably altered. In excess of two hundred and fifty (250) acres have been directly involved in the slide, which first became evident in 1956. More than one hundred and twenty-five (125) dwellings were destroyed or relocated outside the impacted land. The slide has continued to disrupt basic neighborhood existence and additional residential units are becoming ;-� entangled in the deterioration of the physical-social environment. The damage over nearly thirty (30) years of instability and upheaval is clearly seen in the streetscape of existing residential segments of the Area and as viewed from the coastal road. A once vigorous and viable residential neighborhood has been relegated to scattered, deteriorated and questionable safety. While residential densities in the Area are low, the tranquility of the environmental presents a false facade, masking actual conditions. The future is one of continued decline and eventually major destruction of this scenic portion of the coast. Social interaction of the residential occupants of the Project Area have not been enhanced by the affects of the slide. While present residents may have fewer neighbors than prior to the slide, they still must contend with an uncertain and declining neighborhood; this deteriorated condition effects all aspects of daily existence including travel, recreation, services and aesthetics . Visitors are exposed to the topographic scar and substandard conditions of years of erosion and decline; the main coastal arterial is broken and in a state of constant repair . The reduction of vehicular travel speed to fifteen (15) miles an hour and bare soil, void of vegetation, near the road are more than subtle signs of physical problems. Added to this are the limited, paved right-of-way and exposed utility lines. The public's overall view of the Area must be one containing negative connotations. The beauty and potential of the Project Area has been reduced over time as has the quality of the living atmosphere. 63 Past and present land use controls, invoked to reduce the exposure of residents and public to safety hazards, have fostered a policy of no new residential development; this lack of growth--including infill--has not added, in a positive manner , to the establishment of "sound" neighborhoods in the Project Area. Public investment in the Area has focused upon maintenance; this has been a great burden on local government and has j detracted from use of funds for other priority projects . Physical and social problems tend to be interrelated. Social behavior is usually influenced by the physical environment which in turn effects people's welfare. Physical deterioration encourages people to move to residential neighborhoods which are more stable and do not have significant safety problems. Property values "tend to decline in an area which contains physical K- -hazard problems; normal services, facilities and utilities are not provided in ways that are aesthetically pleasing nor economical . Where there are many gaps in the neighborhood fabric-- e.g. , scattered housing patterns-- social unity is bound to suffer . An unstable and hazardous physical environment encourages non-cohesive neighborhoods. On the more positive side, residential sections of the Redevelopment Area have a large number of residents in professional and management-level positions; they are also well educated and have an economic status greater than most such areas. A more stable, hazard-reduced environment can utilize existing neighborhood human-resources to build upon in establishing viable residential areas. The slide area has become an educational device for researchers, students and teachers who are attracted to its unique features; removal of this hazard will reduce the use of the Project Area for such study and research; however , the Redevelopment Project will provide an interesting environment itself for study and research of stabilization techniques utilizing mitigation to avoid or reduce adverse impacts in the Coastal Area. 411 { 64 4 .9 AIR QUALITY 410 A. Setting The site is located in the South Coast Air Basin, a region made up of the Counties of Los Angeles, Orange, Riverside and San Bernardino. This region is characterized by low coastal valleys bordered by inland mountains resulting in a natural geographic basin. Air quality in the South Coast Air Basin generally is poor . Frequent thermal inversions act as a ceiling to trap polluting emissions at low altitudes. Inland mountains act as walls to prevent the dispersion of pollutants. Most air pollutants result from the burning and processing of petroleum products such as from automobiles, electric power generation, and petroleum — storage and refining. Unhealthy air frequently occurs in inland areas of the Basin, much less so along the coast. Because of regular onshore winds experienced by the City of Rancho Palos Verdes, air quality data obtained at the South Coast Air Quality Management District 's Long Beach Monitoring Station (which is closest to the site) , shows that there tend to be relatively fewer days of the year when air quality standards are exceeded, when compared to most other 411 sampling locations in the region (See Table on Air Quality Data 1983 SCAQMD) . The distinctive climate at the site is strongly influenced by its close proximity to the marine environment. Temperatures at the site generally are cooler in the day and warmer in the night than inland areas. Average temperatures vary only mildly during the day, and during the year (See Table on Monthly Average Temperatures) . Dense fog menaces the site most frequently during the months of October through December , and least frequently from March through May. The site receives an average of about 12.5 inches of rainfall per year . The rainfall season runs from y November to April, with December to February accounting for most of the precipitation. Relative humidity is high in the coastal region partly the result of coastal fog. Humidity is highest in the morning and lowest in the afternoon, See Table on Relative Humidity. 411 65 • The dominant wind pattern for the area results from the action of sea breezes. These winds come from the 110 west-southwest direction on most afternoons and reach a maximum speed between 5 to 13 mph, from 2 and 4 pm. The most frequently encountered wind patterns for the site are shown in the following Figure on Typical Winds in South Coast Air Basin. Occasionally, Santa Ana Winds blow from inland and result in unusually high temperatures (80's) and extremely dry air (humidity often less than 10%) . Santa Ana Winds will occur from October to March. Southwestern winds are another exception to the predominant sea breeze pattern. These winds occur during winter storms and rarely last longer than a day. The winds are preceded by vigorous rainstorms and often reach speeds of 30 mph with gust up to 5.0 mph. Northwestern winds are another unusual wind «� pattern which occurs in winter and spring. They usually follow the passing of a cold front through the area. Rain often does not accompany these winds which bring cold air from the north with wind speeds from 25 to 35 mph, and gusts to 50. SITE CLIMATIC DATA Mean Temperatures (°F) Jan Feb Mar Apr May Jun Jul Aug Lek Oct Nov Dec High 59 62 63 64 65 68 72 75 73 69 66 62 Low 49 51 51 52 55 58 61 63 61 57 54 51 Average Relative Humidity (%) January April, July October High, 78 88 85 88 Low 71 69 75 78 u . Source: Coastal Specific Plan, Environmental Impact Report, City of Rancho Palos Verdes, Dec. 1978. 411 66 B. Impact Short term impacts will result from construction activities on the site. These impacts will result from emissions from construction equipment and dust from earth moving activities. It is expected that unavoidable emissions from construction equipment will not have a significant impact on the air quality of the area. Dust generation from earth moving activities could result in significant short-term impacts if appropriate mitigation procedures are not implemented. Based upon a dust emission factor of 1.2 tons per acre per month (Compilation of Air Pollution Emission Factors ti (AP-42) , Part B, August 1977, U.S. EPA, Research Triangle Park, NC) , estimated total acreage where earth moving activities will occur (220 acres) , and a construction time of about 6 months, about 1,584 tons of -dust could be emitted from the site. Dust control practices can reduce this value by 50% or more. The unavoidable impact will be that dust emissions from construction activities will result in short-term nuisance to nearby residents due to increased fallout of dust particles. No direct long-term impacts are anticipated; however , the possible future development of homes on the site would incrementally increase the burden on and polluting 410 emissions from local electric power generating stations. In addition, the potential development of new housing at the site would incrementally increase vehicular emissions in the Palos Verdes area. Based on a projected development of 500 single-family housing units at the site, a moderate amount of automobile emissions would be added to the site and vicinity (10 mile radius) . Note the following table. • ESTIMATED ANNUAL EMISSIONS RESULTING FROM AUTOMOBILES FROM ADDITION OF 500 SINGLE FAMILY RESIDENTS (Tons/Year ) Hydrocarbons Carbon Monoxide Nitrogen Oxides 23 198 14 (Ref. Urbemis #1, A Land Use Emissions Model, State of California Air Resources Board, 1983. ) 410 67 These numbers represent moderate incremental increases in- local emissions, the effect of which could contribute to more frequent exceedences of State Ambient Air 411 Quality Standards (See table on Ambient Air Quality Standards ) . C. Mitigation In order to minimize the short term impacts from the project, the following mitigation should be implemented: 1. Specific ground wetting procedures should be performed during grading and earth moving operations. All graded and exposed soil and roadways should be frequently sprayed with water in order to reduce dust emissions during construction. N- 2. Fuel efficient and low emission construction equipment should be used when ever possible. 3. Because of the growth inducing impact of this project, energy electrical features should be required for any new residential development inside the project area. This requirement will help minimize additional air emissions from nearby power generating stations. 4 . Considering the fact that the City of Rancho Palos Verdes currently enjoys high quality air, the air quality impacts of any sizable housing development which should be proposed at the site as a result of slide stabilization, should be throughly investigated. The investigation should determine the estimated increases n concentration (parts per million) of air pollutants, and should determine if such incremental increases could result in significant impacts to local and regional air quality and/or could result in more frequent exceedence of State Air Quality Standards. 68 _y AIR QU*I ITY 1983 SOUTH COAST AIR QU AL I T T MANAGEMENT DISTRICT ...fox tone trogen ox a ur ox e Source/ Location - loo. -Days Standard- ltu. Days -tandard` 1No. Days Std. i No. Days a . COOK.Receptor of Msx.Conc. Exceeded Max. Conc. Exceeded Max. Co . Exceeded Mix. Cont. Exceeded Area Air Monitoring; In ra ra a e a e in e'era t. e in tae in Federal State No. Station , PPM >9.3 PPM > 3S PPM >9.1PPM > 20 PPM PPM >.12 PPM >.IOPPM PPM > .25 PPM PPM > .14 PPM >.05 PPM,. 1-Hour -Moors 1-Noun S-Hours T-Hour 1-Nutie 1-Hour T-Hour 1-Hour 1-Hour 1-Hour 24-Hours T4-Hours ), 1 Los Angeles , 17 8 0 ' 10 0 .2o 69 114 .4X 5 .07 0 0 2 W. Los Angeles' 22 12 0 16 1 .23 3! 84 .47 , 4 .06 0 0 3 Lennox 31 43 0 46 4 .18 9 23 .32 5 .09 0 0 4 Long Beach 14 7 0 7 0 .30 16 35 .37 3 .12 0 0 5 Whittier 16 4 0 7 0 .32 67 100 .32 4 .09 0 0 6 Reseda 20 14 0 15 0 .26 61 112 .23 0 .03 0 0 7 Burbank 24 21 0 23 1 .31 9S 131 .30 5 .04 0 0 . . . 8 Pasadena 19 8 0 8 0 .34 122 159 .35 5 .05 0 0 9 Azusa 10 0 0 0 0 .39 123 151 .26 1 .03 0. 0 10 Pomona 15 0 0 0 0 .34 102 135 .21 0 to m NI 11 Pico Rivera 14 3 0 4 0 .33 98 133 .31 4 .08 0 0 12 Lynwood 24 31 0 34 5 .23 27 51 .27 1 .06 0 0 13 Newhall 101 NM 1M IM NM .29 85 119 1M !M"1 MM N4 • NM 14 Lancaster 13 0 0 0 + 0 .18 , 42 94 .09 0 M M NM La r ra b."...° b 1 .27 64 100 • 17 , Anaheim 17 3 0 5 0 .30 40 74 .24 0 .05 0 0 17 Los Al am1 tos m m NM NM N! .20 16 42 lM NM .05 0 0 18 Costa Mesa 14 1 0 1 0 .25 15 41 .27 1 .04 0 0 19 El Toro 7 0 0 0 0 .29 24 54 ISM to ' MM , N4 , NM NMl IM NI 'i rco- orona 0 0 23 Riverside Rub. 8 0 0 0 0 .36 121 152 .19 0 .02 23 Riverside Mil. 15 0 0 0 0 NM IM Ni M M NM m Pm 24 .Perris NM m IM NM N1 .26 88 128 NM NCI IM M4 NM 29 Banning NI IM NN IM 1!1 .26 67 90 to m NM IM Ni 30 Palm Springs 7 0 0 0 0 .19 40 86 .16 0 .01 0 0 __E!___.11.1112_nd1 o N1 IM to IM No .18 33 80 m m NM NM A NM P a 1 , , , .03 �---• 33 Ontario m m IM! IM NM Ni NM IM NCI IM Ni N4 M1 34 Fontana 10 0 0 0 0 .32 127 152 .16 0 .06 0 0 • 34 San Bernardino 9 0 0 0 0 .32 117 147 .19 0 .02 0 0 35 Redlands 9 0 0 0 0 .30 109 136 III NN NM Ni NM _Illyr. lake Gr or Ni N! 1M _ IM _ NI _ .28 _ 117 143 , IM _ 1M _ IM! _ NM N� 3 - arts y vo ume per • on par s or air. mg/ma - Micrograms per cubic meter of air. KM - Pollutant not monitored. 12i;) South Coast NO • No data available. AIR QUALITY MANAGEMENT DISTRICT NA - Data not available as yet. 9150 Flair Drive AGM - Annual Geometric Mean. El Monte, CA 91731 a) The Federal (3-hours ) .50 ppm) aed State (1-hoer > .50 ppm) standards Mere not excoodef. b Twenty-four hours > .05 ppm with 1-hr. ozone > .1 d'ppm, or with 24-hours TSP > 100 ugh e. . Nev. 5/84 rn ,0 • AIR QUALITY DATA 1983 • • SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT s. ndeI Particu ales H •Vo lead Hi-Vo_ ate Hi-Vo V s it _ -Days o Source Location es sCee rcen ►' • ' cas ons • amp es location Meet- / Stand. Receptor of Total Max. ?4-Hr. Standards Standard Exceeded Mix. Standard Exceeded Max. Ex• Area Air Monitoring Samples Conc e era State e'era tote Conc eiera tate Conti, --Still'. State �� >26U >1 >l00 > 75 ISM >60 ug/ri,3 1.5 ug/m3 1.5 ug/m3l u9/M > 25 ug/m3 tate rd,. No. Station Collected vg/ _ 3 i M3 1 t1 Av.. Mo._, v.. 24-Hours �_ os gees {, 1 . • •. , 2 W. Los Angeles 59 156 0 1 4 0 U 1.63 0 0 20.0 0 BUR' AP NA 3 Lennox 53 242 0 2 11 4.5 30.7 2.42 0 0 24.8 0 LAX AP H A, ' 4 long Beach 52 212 0 3 16 2.8 28.5 1.81 0 0 30.8 1 L8 AP NA NM NM NM I N14 NH 104 NM NH NM Ni 5 Whittier NM 0 0 3 0 0 1.79 0 0 22.5 0 7 6 Reseda 59 131 Burbank N' Ni Ni Ni Ni IN l Ni Ni NM NM IMNM 181 0 2 16 1.4 27.7 1.17 0 0 26.8 8 Pasadena 49 25.8 1 220 0 12 24 9.1 36.3 1.07 0 0 25. 9 Azusa 55 � � Ni Ni Ni Ni Ni Ni . Ni Ni 10 Poona Ni Ni i 0 7 30 15.2 44.0 2.03 0 0 34.8 1 �1 Pico Rivera 60 211 27.6 1 232 0 3 22 9.9 37.2 2.48 0 0 27. 12 Lynwood 59 Z Ni Ni Ni 13 Newhall i Ni Ni NM u IN Ni Ni Ni Ni Ni N 0 8.1 0 Lancaster 55 1 14 l 29 0 0 3 0 0 0.54 0 a �ra +, 1 • . 1 0 19.T 0 EL TORO NA � � im 60 116 0 2 11 0 13.5 1.47 � 17 �� 0 0 24.4 0 MCAS 1 16 10.1 37.7 1.s2 0 0 26.3 1 17 Los Mani tos 58 175 0 8 Costa Mesa Ni Ni 1 , IN Ni Ni Ni i Ni NM Ni N1 0 21.2 0 1 Toro 57 158 0 1 5 0 0 0.74 0 0 + MARDI AFB NA 19 E AN N gN �i IN NM ' corona � � 27.7 1 1 2� � to- 0 23 Riverside Rub. 58 285 1 28 37 46.8 83.5 0.92 0 0 27.7 1 Riverside Nag. 60 241 0 15 26 18.5 48.2 1.10 0 � 23 9 24 Perris 54 199 0 7 21 0 23.3 0.49 0 0 17.9 0 14 0 0 0.37 0 0 20.1 0 29 Banning 59 201 0 4 1 0 0.23 0 0 13.3 0 30 Pa l� Spring= 60 159 0 1 5 0 12.3 0 30 Indio 51 305 1 S 15 10.3 37.8 0.35 0 0 13. , . i 'r 32 upland 0.94 0 0 27.2 1 ONT. AP NA 33 Ontario 57 212 0 12 25 7.1 33.8 33 26.8 34 Fontana 60 213 1 17 3 58.5 0.57 0 0 33.1 1 8 0 0. 27.1 1 34 San Bernardino 56 233 0 IS Z7 13.7 42.2 0.88 0 24.1 0 I 59 250 0 11 23 3.1 28.8 0.43 0 14.1 0 - - 35 Redlands 0 _ 0.26 0 _ 0 37 Lake Gre or 57 l 102 0, 0 _ Z _ 0 tier standards (M110. SO CHI/�.Z4•hodrs; 30 rs/ , A�) to c) The State Air Resources Hoard have adopt new particulate• AsM . Since PM (p.rticvlate cotter eg0a1 or less than 10 •ltrons e ace the revlors standards X104 r9/u . 24•hoer:. 60 r9/ . y standard exceedances are based on the replace P District stations, sta aerodynamic diameter) data have not been collected extensively at 0 str y former standards. 10 idles or greater on days when relative humidity Is less than 70%. d� visibility standard !s 1 !�'e 0 111/ 1111 0 TYPICAL WINDS IN SOUTH COAST AIR BASIN 0 , or.a.k Per. .;P. . . .. t . . .. , 1.! FL,1;-- -i,W.,- 4 a v . , k 4' eirs,,L,. , , . 4- . 1: e "k • N1/41:t ,.. ..J.-1): re--rl. . i i 47°. • •$ %'b.. i.Ili",*0 , * .t 4 1 gi .. - ..• -.4 s il ; IV- .r 2-* itV1 . '' ' -.‘ . A. ' • I I. .#1, %--...- _ :... 4.1. - ' )- 0. , . ?. -t . 1. ---...,...L. ' • , iltirli .= , - alf .f.: . .• ti • tabLos .17*** •••,#* • In•m • t. • ' •,• • V. - .8,....11,4%.:44 " 61.11111‘ r../..ki.; ••44Eill. '.;'../i* si• "IS'.'".i - •%.;e:1"• •-'1f• 7,.4i ‘ ..-1. . tif i p_Ai. • ..,r:"% .f, . •• .,sue .: ' •! - .•:" • - 41% ' .. ;■-. ''.... • • • .. lo- . ''.';1. . lik.44; —-1.1, : J a. - •. ziiiiii ,_ , . 1.42.• , !N.!!.11. , . .- ,.,..A. ., Np......" . . ..., ,, . . ., gvt--- - ,- . ! • • - No* ..._.4 . .„ „ . . ..*1 • ∎ t:.-! 0 $ , .sri■ar. • Pi- .d. .N t 10 MPH .. I* . ?• • ,fer i • -.i, :.-4,,A :IN, -----Th1/4 0,..41.: - ..N. II...',.‘-,,ix-f.- IT ..,...:.., ... i,.., - 4S) . , i • 1 TYPICAL SUMMER DAYTIME OCEAN WINDS TYPICAL SUMMER NIGHT DRAINAGE WINDS (Noon to 7:00 PM) (Midnight to 5:00 AM),j._11_•■•• *• 4"‘........,..... .afr;e iji. .%,1 I '7',Pyt''. '.' • - 1 'zir...7...,04W,..-; 1 ig:..•••, . . I !IF.f i`.:Aen-. - \in.:-eb. . • 1 ti"-1 tva tt,1-',-,-*i r.. Nc!-..e-N4 . . 1 4. 1... Awl.. .it'd.. 4., - .N1,44,„, t .. ., „I.e..- ..,...........10404:,_ ., . k . Inri;b. :4 # V( f• N't: f .' I-1,i; 7i< ••%..‘ ''4'. .14. p -* ....4c44104 4k:t. -- ,-:14: .1 , • , - .•--- • • - .... . .., ..,' -.. -tri,ii: A! • . l?' : • , •4. • .- l'r .,- ---. "194k .:LN ,fil ., I. t. VAial , '-. " eit. - % . oi, / #1 . .. . .1. ?—z— ... i .... • 4. ...k, * . i ,,,,, .. , •. ,,,,r...... ".. s r, Mi7411PIP 1 4 . . ' ! . .."1.1 at l'•"' ,, - .1/4; / '•� • •i•( •:. '',Ni .; •;•• ;% 4• . : !••+A4•' ! . , ' .-...Nti,.-:'7, ..... • ,! ' . -..':.C'S. -.7 4 *- . *) • : J . ..f. f • si �1 •�- is •• - • ' • �. I.,• • .. 1 1•,: •• •" `• •:is 4;11 0,411:y•j..... ..,1 -,.-.... . .. ,-- ■ - -i.: soisNk -,- ,, .4.- ... : :- t. .1 I.,1 ..t.,, ,t‘e, N, .1,:j1—... ..,APti V.i *_.• • jsc- IN) '. V:'?',lid"' le, I i; .--..1:Aik• 211'• : 1":1‘ • . '.1/0Z...' 'VS • • . %... ' , i.4......;.. .74V,„ 6 1 , • TYPICAL WINTER DAYTIME OCEAN WINDS TYPICAL WINTER NIGHT DRAINAGE WINDS (Noon to 5:00 PM) (Midnight to 7:00 AM) N. These maps show dominant summer and winter wind patterns in the South Coast Air • shown the net transport of air onshore usually is greater in the Basin. For the period of the day . mmer, while the net offshore transport as a rule is greater during the winter.Whether there is air movement or air stagnation during the morning and evening hours,before these dominant air flow Pa turns take effect, is one of the critical factors in determining the smog situation on any 0 given day. Source: "Air Quality and Meteorology, 1976 Annual Report", John L. Hills , Ralph VI. Keith, and Julian Foon, - South Coast Air Quality Management District 71 I . AMBIENT AIR QUALITY STANDARDS .___ ...............•........... National Standards. Pollutant Averaging Time California Standards` Concentration' Method' Prim ! secondary•.• Method' • ;;idsnt'. 1 hour 0.10 ppm Ultraviolet — — — (200 uo/n+'I Photometry . —. , 0.12 ppm Same as Primary Ethylene Osone 1 hour — (235 uo/R+'1 Standard Chsm11YTinescence Carbon Monos.de s 0 ppm• Non-Dispersiw 10 & Same as Non-Dispersive S hour 110 trio/tt� Infrared (9001n)' Primary Infrared a Spectrosv t! Standards Spectroscopy ::= 1 hour • 20 ppm — (NOIR( 1NOIRl 40 mg/rn' (23 trio/rn') 135 ppn+l - ∎ 100 uo/RI' Gas Pass, Nitrogen Moulds- Annual Average — Cu Phase 10.05 ppfnl Sams as Primary Chemnilurntnescence Chernilutni• Standard 1 hour 0 25 PPM nescente (470 uo/rri'I - - . --+ ► _ p Sulfur Dioxide Annual Average — s0 uo/m' — (0.03 ppm) 24 hour 0.05 porn 365 ug/rte — (131 ug/rn')' Ultraviolet 10.14 ppml Pararosaniiine Fluorescence .. 3 hour _ _ n� 1300 ug/ ' (0.5 pprnl . 1 hou. 0 5 ppm = -- — . (1310 uo/m' • - - - Suspended Annual Geonnetr - 40 ug/rn' TS up/rn' 60 uo/rn' Pa,t=culata Mean Matter - — High Volume High Volume Sampling 24 ho 100 up/m' 260 ug/rr 150 ug/m 411 Sulfates 24 how 25 ug/n+' Turbidsmetric — — — Barium Sulfate . • lead 30 day 1 5 ugi nt3 • Mimic — — — Aver age Absorption • _.! ., Calendar — — 1.6 uo/m' Same as Pri- Atorn•c Quarter . ■ friary Standard Absorpt'on - -•.• .. ._ _ tvdrogen I hour 0 03 ppm Cadmium Hydros- — — — SuNide (42 ug/m') 1de STRaetan Vmnrl Chloride 24 hour 0 010 ppm Tedlar B tChlurnethene) (26 up/inn Collection.Gas -- Chrornatography V.s.bslsly 1 observation In sufficient amount to Reducing reduce the prevailing visibility' Particles to less than 10 miles when the relative humidity is less than 70% - — — — APPLICABLE ONLY IN THE LAKE TAHOE AIR BASIN: Carbon Mono•ide S hour I ppm NOIR MINI. — _ rl - (7 ,o/rn'1 - Vis+blsty 1 observation In sufficient amount to Reducing reduce the prevailing vistbiltty —. — — lerticlws to less than 30 miles when the I elatsve hurr+sdstr Is less than 70% • • (FOOTNOTES ON REVERSE SIOE1 . 411 Tcn 3/84 72 NOTES: . California standards.other than carbon monoxide,are • . necessary. with an adequate margin of safety, to values that are not to be equaled or exceeded. The . protect the public health. Each state must attain the carbon monoxide standards are not to be exceeded. primary standards no later than three years after that state's implementation plan is approved by the En. 2. National standards. other than ozone and those based vitonmental Protection Agency(EPA). on annual averages or annual geometric means,are not to be exceeded more than on a year. The ozone 6. National Secondary Standards: The!svels of air quality standard is attained when the expected number of days necessary to protect the public welfare from any I calendar year with a maximum hourly average- known or anticipated adverse effects of a pollutant. concentration above the standard is equal to or less Each state must attain the secondary standards within t f than one a "reasonable time" after the implementation plan is approved by the EPA. 3. Concentration expressed first in units in which it was promulgated. Equivalent units given in 'parentheses 7. Reference method as described by the EPA.An"equi are based upon a reference temperature of 25°C and valent method" of measurement tray be used but mist a reference pressure of 760 mm of mercury. AU nteas- have a"consistent relationship to the reference method" urements of air quality are to be corrected to a reference and must be approved by the EPA. temperature of F-25°C and a reference pressure of 760 mm of Hg (1,013.2 millibar); ppm in this table S. Prevailing visibility is defined as the greatest visibility refers to p'm by volume, or micromoles of pollutant which is attained or surpassed around at least half of per mole of gas. the horizon circle, but not necessarily in continuous sectors. 4. Any equivalent procedure which can be shown to the satisfaction of the Air Resources Board to give equi- . 9. At locations where the state standards for oxidant valent results at or near the level of the air quality and/or suspended particulate matter are violated. standard may be used. National standards apply elsewhere. S. National Primary Standards: The levels of air quality 10. Measured as ozone. • • , • • 34" ARB Fact Sheet 38(Revised 1/831 TSD 3/84 73 4 .10 NOISE The principal generator of noise in the Project Area is 410 associated with Palos Verdes Drive South. Noise contours indicate that, except for single-event occurances, only those residences immediately adjacent to Palos Verdes Drive South are within an area as high in noise level as 60 dB(A) . Garbage trucks and other larger service vehicles occasionally impact residential areas with noise which can reach, or even exceed, 90dB(A) . Since the Project Area is predominantly single-family residential, with considerable sections of recreation space, there are no internal generators of significant noise--e.g. , shopping centers and industry. Due to the landslide, vehicular traffic has been forced into reduced speeds on Palos Verdes Drive South and posted travel signs limit such movement to fifteen (15) miles per hour on portions of this arterial . This reduction in travel velocity has generated a lower overall noise impact; however, added maintenance necessary to keep the road open adds to noise levels on occasion. In the coastal area, a policy of bluff setback, to limit residential location and other development, along with General Plan Control Districts, establishes a framework for large amounts of land to remain in open space. This density control will reduce development near the road thus exposing fewer residents to noise impact. Vegetation buffering along the Arterial, and low height on the oceanside, should reduce anticipated vehicular noise levels. Refer to Section 4 .2 for additional discussion regarding traffic and circulation noise impacts . State guidelines contain recommended standards for ambient noise levels for residential land use. Average interior noise levels during the day should not exceed 55 dB(A) and 45 dB(A) during the evening. Exterior noise levels should not exceed 60 dB(A) . An increase in noise levels from Palos Verdes Drive South can be expected when the right-of-way is brought to acceptable construction standards. Additional residential development in the Project Area will add to traffic and noise levels; locally generated traffic will be minor when compared to visitor traffic. 411 74 All indications are that with sensitive planning, noise levels will not be a major negative influence in the Project Area. Annoyance due to residential construction will increase as the Project Area is infilled with low-density development; however, this condition is short-term and will be minimal. Noise which may be generated from dewatering-well pumping should not be substantial; depending on locations and design, these necessary facilities could contribute negatively to aesthetics if not placed underground. 411 411 75 4 .11 COMMUNITY FACILITIES AND SERVICES 4 .11.1 WATER A. Setting The domestic water needs of the Redevelopment Area are provided by the California Water Service Company through a storage and distribution system which includes a series of holding facilities, booster stations, pump stations and distribution lines. The Metropolitan Water District' s Peninsula reservoir supports the local water supply network. The facilities serving the Redevelopment Area, except for water pressure problems and above-ground visual intrusions (lines and storage) , are adequate; in general, these facilities have the ability to provide service to new residential development in the Project Area. Many of the present lines directly serving existing residential uses in the Redevelopment Area are below standard size; slide hazards have fostered an above ground series of lines which need to be upgraded to allow for (at least six inches) greater capacity, pressure and flow. Project-Area water distribution lines utilize the basic street pattern of rights-of-way; while the above ground piping of water permits more flexibility in maintenance in the active slide area, it also fosters smaller than desirable lines, contributes to potential safety problems and is visually unsightly. An above ground storage tank is located north of Peppertree Drive and has an 100,000 gallon capacity. Lines as small as two inches serve present uses in the Redevelopment Area; domestic lines in the Project Area are mostly too small for adequate pressure for fire-safety purposes. B. Impact The implementation of the Redevelopment Plan would establish a stable physical environment; this would create a more normal situation in which to install and maintain adequate water facilities. It would allow lines to be placed below ground and eliminate a visually blighting condition in the Area. The size of lines and water pressure could be adjusted to acceptable levels for domestic as well as safety purposes. 76 . The impact of approximately 300 - 500 new residential 411 units could generate a gallon per day consumption rate of between 190,000 and 315,000. Water facilities utilize existing and proposed street rights-of-way; so, upgrading and expanding the system should produce minimum impacts. No new facilities of any magnitude are proposed for the Redevelopment Area. Undergrounding could also contribute positively to the overall traffic movement in the Area by taking away a barrier to . pedestrian and bicycle circulation. t=x C. Mitigation Mitigation should include the replacement of inadequate water lines and related facilities and the placement of such elements underground. Since water lines are -extended along with new roadways, close coordination and multi-entity mitigation must be achieved. Water r�` pressure must be brought to acceptable fire-fighting standards. Increased demand for water by additional residential development should not cause problems since the basic system is adequate and can be easily expanded without significant impacts. Every opportunity should be taken to landscape areas subject to water line upgrading and 410 expansion. The present Project Area physical environment does not allow for a low-maintenance reliable water distribution network in an aesthetically acceptable manner . 4-.11 .2 SEWERS A. Setting The City of Rancho Palos Verdes sewage collection and treatment is handled by Sanitation District No. 5/South Bay Sanitation District. While the County is responsible for the collection network, the Districts treat and dispose of the final product. Waste treatment takes place outside of the City. In the Project Area, as with other elements of transportation and infrastructure, the sewage lines are above ground and are a visually blighting influence. Breaks in the line have occurred in the past which has caused raw sewage to be spilled into the sensitive coastal environment. !II 77 B. Impact While the Project Area will generate new residential 410 development, it will be minimal and sanitation facilities are adequate to handle the expected increase; however , new and/or additional pump station abilities may be required in the overall transportation of waste created in the Redevelopment Area. The Redevelopment Project is estimated to add, by new development, between 66,000 and 110,000 gallons per day to the sanitation system; this amount, in itself, is minor and its impact is almost negligible. The ability to place Project-Area sanitation transmission facilities underground is an impact which is aesthetic and functional; maintenance costs should be reduced and a more reliable segment of the overall -.system created. Existing and new residential development should be required to utilize the collective sanitation system, not individual septic tanks. Individual sanitation units may be contributing to the slide condition and an expanded community system, in a more durable environment, is necessary. C. Mitigation The existing system has the capacity to accommodate sewage generated by the Redevelopment Project; however , transmission lines must be placed underground and !II extended to serve existing development now using individual septic tanks. Existing and new vehicular rights-of-way must take into planning and design thought the use by sewage lines. Care must be taken to insure minimum impacts to natural resources of the Project Area; each new development must be evaluated and judged on its merits as well as accumulated effects. Where new or expanded pump stations are constructed, extreme sensitivity should be exercised to insure a location, design and landscaping which will blend with their immediate surroundings. No new or expanded station should block viewsheds of significance nor become a major element of the coastal environment. 78 4 .11. 3 DRAINAGE AND FLOOD CONTROL A. Setting The Redevelopment Area has sections of high slope which is a significant factor in slides, flooding, erosion, mud flows and development options. Stability is the principal problem in the Project Area and the movement of surface water is basic to the safety and land use concerns of that Area. A more durable Project Area would allow for an upgrading of present facilities and } provide an opportunity to reduce maintenance costs. The FA western canyon areas accumulate surface water and u channel it to ocean outlets; these waters tend to gather debris and establish mud flows which exacerbate the already significant erosion problem in the Project Area. These canyon flows also interact with Palos Verdes Drive South and, at times, hinder its maintenance. At various areas of flow interface, the problem of erosion is more acute especially where water velocities reach unnatural rates of speed. This condition is particularly acute in the eastern portion of the Project { Area. Visually, the surface drainage pattern has been altered due to slide hazards and natural vegetation has been damaged. The lack of ability of soil in 'the Redevelopment Area to absorb major runoff has contributed to the downsliding problem; steep topography has also increased damage potential of runoff . The existing situation is one of continuous deterioration of the physical resources of the Project Area and the establishment of an atmosphere of uncertainty. Current facilities are a combination of natural accumulation and carrying resources in addition to people-made storm drain elements. Both segments are in need of reevaluation and planned integration. B. Impact The Redevelopment Project would establish a stable physical environment which would increase residential low-density development. Runoff would be increased due to new development and reduction of present non-urbanized land; absorption land for surface water would be decreased by housing development in the Project Area. The overall drainage system must take into account this additional runoff; natural and people-made storm drain facilities will channel more water to the Ocean and an increase in urban pollution levels may occur . 79 Balancing major public works stabilization facilities with natural resources and limited residential development is critical to the Project Area. Considerable recreational areas will remain; however, topographic alterations will be necessary for a successful Project. Housing opportunities, both new and existing, will be stimulated as will related needs for a better and more reliable infrastructure system. C. Mitigation Mitigation measures must include a detailed hydrology review before any new or improved alterations to the existing pattern is implemented. Erosion and flood -prevention facilities need to be examined and pollution F- effects reduced to streams and ocean. Devices to slow the speed of runoff need to be considered and those selected to be used should blend with the environment of the Peninsula and Project Area. Landscaping should be intensified to reduce visual impacts as well as to form a segment of soil stabilization and reduced water infiltration and runoff. Coordination and cooperation among governmental entities must be increased so as to effectively address meaningful, environmentally sound solutions to a complex, interrelated physical problem. The problem is unique and innovative techniques and approaches must be developed; there is no inexpensive permanent solution. Residential development and roadways must be placed so that they will blend into the Project Area and at densities which have a minimum effect on topography and natural resources. 4 .11 .4 SOLID WASTE A. Setting Private firms provide solid waste service to land uses in the City; each independent company has an established territory and uses a regional transfer station and/or landfill for disposal. } 80 The collection system is providing adequate service to the community and is composed of the following entities providing residential service to the Project Area: 1. Removal Incorporated (Lawndale) 2 . Ivy Rubbish Disposal (Harbor City) B. Impact With between 300 - 500 residential units being added to ' - the Redevelopment Area, an overall increase in solid waste (3,000 - 5,000 pounds per day) will occur ; this new development should not produce a significant burden on the solid waste collection disposal system. Regardless of the minor increase in solid waste produced by additional residential units in the Project Area, — landfill sites will have their operating life reduced by the new material placed in the facilities. By itself , no landfill site will be closed or adjusted in operating technique due to the Redevelopment Project. C. Mitigation It is recommended that Project Area residents be encouraged to recycle as much solid waste material as reasonable while compacting the waste to be collected for landfill disposal; this will help to reduce impacts on the collection and disposal system. The Redevelopment Project will provide for an upgrading of Palos Verdes Drive South, and related roadways, which will aid the movement of collection vehicles in the Area and its environs. 4 .11 .5 ELECTRICAL SUPPLY 4e A. Setting The Redevelopment Project is served by Southern California Edison Company and the Marymount Substation (outside the Project Area) would provide the electrical power new development would require. It is expected that the limited development provided in the Redevelopment Plan would be well within the capacity of the Company to meet demands; the Marymount Substation connects with other substations in the Company's grid system. 411 81 Southern California Edison Company does not have any major supply lines (66 KVT) in the Project Area but does • have distribution lines above ground to serve residents in the Area. These exposed lines provide an additional maintenance burden and are aesthetically unattractive. B. Impact .5 The Southern California Edison Company is able to handle the expected electrical energy needs of the Project Area; these added demands will range between 5,000 and 8,250 KWH/Day within the Redevelopment Area. C. Mitigation Although the Edison Company will be able to, within the existing energy production and distribution network, accommodate the needs of the Project Area, all efforts should be made in the design and location of new structures to incorporate energy conservation measures. Distribution lines and related facilities should, whenever possible, be placed below ground; the elimination of surface facilities would contribute positively to the City's coastal aesthetics and promote safety. Any necessary surface facilities should be located so significant viewsheds are not disturbed and landscaping employed to reduce the exposure to the general public. 4 .11 .6 NATURAL GAS A. Setting The Southern California Gas Company serves the Redevelopment Area with a distribution system which includes portions located above ground. Pressure in the service lines are 10 p.s.i. or 40 p.s.i . in most of the Area; the sections of 10 p.s.i . are well below normal pressure standards due to the slide hazard which is present. Facilities must be monitored on a regular basis but are adequate for the demands placed upon them; additional residential development will not hinder service and slide stabilization but will allow for upgrading of current facilities. Additional residential units in the Redevelopment Area will require a range of between 48,300 and 80,500 cubic feet of natural gas per day. Crest Road, just north of the Project Area, has a Gas Company line with relative pressure of 150 p.s .i . 110 82 B. Impact Additional residential development will add to the increase in consumption of natural gas; however, no service problems would be created by the Project. Any extension of service would be in accord with the Company's policies and rules filed with the State's Public Utilities Commission. Supply of natural gas is influenced by both State and Federal regulating agencies. The Gas Company has developed various programs to provide assistance to developers and homeowners in selecting workable conservation techniques. C. Mitigation :No major difficulties are expected in natural gas :- service - extensions within the Project Area; also, energy conservation techniques, including site planning, will be utilized to reduce demands on the resource supply and the transmission system. Conservation consideration should occur at the earliest opportunity in the development process. Efforts should continue to provide energy information and conservation education to developers and homeowners. 4 .11.7 COMMUNICATIONS A. Setting General Telephone Company provides the Redevelopment Area with its telephone service. Present facilities of this communications system are adequate and extension of service throughout the Project Area is anticipated to cause no unusual problems. Negative visual aspects of telephone facilities in the Area must be addressed in a similar manner to electric service. B. Impact Extension of telephone service will provide an opportunity to upgrade facilities and improve on coastal aesthetics by use of undergrounding; the use of additional cable lines will be required to serve the Project Area. C. Mitigation The Redevelopment Project will provide a more durable physical environment in which to provide telephone service; the use of undergrounding of facilities should be provided whenever reasonable and feasible in the 411 Project Area and its surroundings . 83 Necessary above ground facilities should be located in a manner which will not block coastal views nor should it employ material which does not blend into the immediate environment. 4 .11.8 POLICE PROTECTION A. Setting Police protection for the Redevelopment Area is provided = . under City contract by the County of Los Angeles ' Lomita Sheriff Station; the Project Area receives adequate protective services. The Project Area has access to the 911 Emergency number for fire, police and medical. The substation is located along Narbonne Avenue just north of Rolling Hill Estates. r F- B. Impact The Redevelopment Project would not generate a large increase in demand for police protection; however, any increase in development does place an additional burden on most services. The Project Area is already receiving police coverage and the increase of residential units should not be of significance to the overall protection system for this section of the City. C. Mitigation 411 While the addition of 300-500 new residential dwellings will increase calls for protective services, these calls would come from an area already under service contract. Service levels need to be constantly monitored and evaluated in terms of local priorities and financial constraints. Street and development design need to be prepared with safety services in mind; this planning process should include adequate signing, lighting and unobstructed viewsheds. 4 .11.9 FIRE PROTECTION A. Setting The County of Los Angeles Fire Protection District provides the Redevelopment Area with fire protection and related emergency services. The Station serving the Project Area is No. 53 on Palos Verdes Drive South (west of the Project Area) . Also able to serve the Project Area are stations No. 83 on Miraleste Plaza (northeast of the Project Area) and No. 106 on Indian Peak Road in the City of Rolling Hills Estates. . 110 84 Fire protection and associated emergency services are adequate for the Project Area's residential development; however , topography and water pressure need special consideration and attention. FIRE PROTECTION SERVICE DISTANCE RESPONSE TIME EQUIPMENT (MILES) (MINUTES) NO. OF PERSONNEL t a{ Engine 53 1 2.5 3 Engine 106 6 9 3 Engine 83 4 6 3 Truck 106 6 9 3 R/S 106 6 9 2 Patrol =83 . 4 6 1 i B. Impact New development in the Project Area will add to the fire-emergency coverage provided by present facilities , equipment and personnel. These impacts are not considered to be substantial . C. Mitigation Along with improvements to Palos Verdes Drive South, the Project Area needs to have water pressure in supply lines upgraded to acceptable standards. Roads providing access to properties to be developed need to be designed with specific attention to topography of the Project -Area. Road grades must be within the climbing capability of emergency equipment. Street signs must be clear and subject to night visibility. 4 .11.10 PARKS AND RECREATION A. Setting The City of Rancho Palos Verdes operates and maintains a comprehensive system of parks and recreation facilities. Among the passive and active recreation facilities provided are beach access, community buildings, parking lots, playing fields, restrooms, tennis courts, trails, picnic areas, and other leisure-time resources. Approximately 250 acres of recreation property is developed or under construction; a number of sites remain to be developed including Grandview as well as portions of Point Vicente, Del Cerro and Hesse. Facilities in or near the Project Area include Abalone Cove Beach Park (80 acres ) directly off Palos Verdes Drive South; Portuguese Bend/Ladera Linda (40 acres) off Forrestal Drive, Del Cerro, (4 . 5 acres ) off Crenshaw Blvd. Within the coastal zone of the Project Area are numerous sites for passive recreation and Ocean vistas. 85 School and institutional land and structures also provide the City with supplementary recreational 411 facilities; these resources benefit the Project Area. The subdivision regulations of Rancho Palos Verdes has provisions for developers to donate and/or pay an in-lieu fee to implement the "Recreation Activity" section of the adopted General Plan; these requirements are placed into effect by a formula contained in the Subdivision Ordinance. If required of a developer , .0140 parkland acres per dwelling unit determines the land dedicated for densities of six (6) units per acre of fewer . B. Impact Residential development in the Project Area, at lower -densities, will generate a demand of between four (4 ) and seven (7 ) acres of additional land for local parks; present residential uses add approximately three (3 ) more acres to serve the Area. The addition of residential dwellings in the Project Area should have a positive financial impact on recreational resources. The upgrading of existing nearby facilities may be more economical and productive then the creation of new active recreational land. Regardless, the impact is not anticipated to be significant in that finances will be generated to add to or upgrade existing recreational areas. C. Mitigation The City may desire to upgrade facilities at nearby existing recreational sites rather than establishing a new park in the Project Area; new residential development will add to the demands on local park facilities; however , this should be minor at the projected low density levels of the Redevelopment Plan. Each new subdivision should be evaluated for impact when presented for processing and density levels should be maintained at fewer dwelling units per acre. The Project does not contain any locations for new recreational facilities due to the impact of the Redevelopment Plan. A considerable portion of the Project Area is planned to remain in recreation space, especially in the coastal zone, and terrain necessary for adequate drainage. Additional equestrian, pedestrian, bicycle circulation facilities should connect the Project Area to recreational sites, schools and local focal points. !II 86 4 .11 .11 SCHOOLS A. Setting The Project Area is served by the Palos Verdes Peninsula Unified School District with administrative offices in Palos Verdes Estates. Facilities currently being used by the District include nine (9 ) elementary (one of which includes a pre-kindergarten program) , four (4 ) intermediate and three (3) high schools. There are six (6 ) unimproved a y sites in the District's inventory of land. The nearest elementary schools to the Project Area are Mira Catalina and Point Vicente while the closest intermediate facility is Ridgecrest. High schools in the District are Miraleste, Rolling Hills and Palos Verdes. In the fall of 1984, the District added a continuation high school to its facilities: Rancho del Mar . The increased residential development of the Project will generate approximately 240 to 400 public school students. Of this estimated number , 80 to 135 will be enrolled in K-5; 65 to 110 will attend intermediate schools; and 95 to 155 will matriculate in high school . In general, District student population has, since 1973-1974, been in a declining pattern. Enrollment for the 1984-1985 school year indicates an enrollment of approximately 10,560 students, far below the peak year of 17,836 students in 1973-1974. The following Table summarizes the statistics of the schools which may serve the Project Area: SCHOOL FACILITIES GRADE SCHOOL GROSS ACREAGE CAPACITY** ENROLLMENT* K-5 MIRA CATALINA 10 496 368 K-5 POINT VICENTE 10 526 345 6-8 RIDGECREST 20 4312 719 9-12 MIRALESTE 34 1,642 1,114 9-12 ROLLING HILLS 38 2,598 1,833 9-12 PALOS VERDES 35 2,621 1,939 * Enrollment, September 14, 1984 ** Capacity as of December 1983; current capacity is not available. B. Impact The Project will not result in any significant impact on public educational facilities. Revenues of the District may be enhanced by the small increase in student !II population; tax increment funds generated by the Project should not negatively effect the District's finances. 87 Excess existing capacity of school plants will be sufficient to accommodate the projected increase in student enrollment due to the Project. Improvement to the road system will enable transportation providers for students to move more smoothly and safety to and from educational sites. C. Mitigation None is necessary due to excess school capacity. 4 .11 .12 HOSPITALS A. Setting The City of Rancho Palos Verdes does not have access to F- acute care facilities within the community; however , neighboring entities such as Carson, Harbor City, Redondo Beach, San Pedro and Torrance provide such facilities and services. These are the hospital locations: Inter-Community - Carson Bay Harbor - Harbor City Kaiser Foundation - Harbor City South Bay - Redondo Beach San Pedro and Peninsula - San Pedro 411 Harbor General - Torrance Little Company of Mary - Torrance Riviera - Torrance Torrance Memorial - Torrance Present facilities are providing adequate services to the Project Area. The County Health Department offers other basic health care services to residents of the Project Area - e.g. , clinics and disease control. B. Impact Implementation of the Redevelopment Plan will not significantly reduce the level of services provided by area hospitals. A Project Area increase of population between 900 and 1,500, itself, is within the collective and individual capacity of these hospitals to handle acute-case needs. C. Mitigation Since emergency acute care needs are within the capabilities of present facilities, no specific mitigation is necessary. An improved road system would be beneficial to all emergency services . 88 4 .12 VISUAL 411 The Project Area is highly scenic when vistas and views are directed from land towards the Ocean; however , when seen from the highway or waterfront (looking towards land) it reveals a landscape consisting of a shattered, narrow road generally void of orderly vegetation with a utility "system" consisting of exposed pipes and wires. The hillside is rather scarred and broken with clear evidence of substantial erosion. Residential units appear scattered, older and in some cases, on uncommon foundations. With a road-speed limit of fifteen (15 ) miles per hour , automobile occupants are able to fully observe all aspects of a seriously deteriorated natural and people-made environment . Pedestrian and bicycle -_traffic are also exposed to the scenic decline of the A- Area and elements of a hazardous physical condition. Along the immediate waterfront, land is barren and its interface with the Ocean shows signs of extreme erosion--e.g. , brown water areas extending outward from the shoreline. Broken material and earth from previous road construction is fully exposed to viewers. In general, the Project Area, whether viewed from the Ocean or roadway, is a visual blighting influence on scenic beauty. The readily apparent conditions are only a glimpse of the hazardous deterioration below the surface of the Area. 411{ 89 5.0 UNAVOIDABLE ADVERSE IMPACTS 5 .1 UNAVOIDABLE SIGNIFICANT EFFECTS The Rancho Palos Verdes Redevelopment Project establishes an intention of the City/Agency to implement specific proposals to enhance the stability of the Area. These actions will encourage additional development as depicted in the Plan. Major public works projects will create impacts which are considerable (particularly aesthetic) and they must be evaluated against the overall benefits the general public and local citizens will receive; certain environmental impacts are unavoidable. Mitigation measures may reduce the full negative impact of specific projects; however , a few- negative effects may nevertheless result. At this general level of environmental evaluation, it is not possible to fully determine that all proposed segments of development and upgrading in the Project Area will : not have significant impacts, even after mitigation; thus, it is strongly suggested that specific impacts be evaluated prior to undertaking major portions of the Redevelopment Plan. The Plan segments most likely to generate adverse impacts are these: LAND USE Approval and implementation of the Rancho Palos Verdes Redevelopment Plan will commit land resources to various categories of use. Land uses would be in conformance to the adopted General Plan. This would increase residential dwellings by 300-500 units and thus, reduce present recreation space. Residential uses would require additional streets . Surface runoff would be increased and existing topography and vegetation would be disturbed. Major public works projects would become readily visiole throughout the Project and possibly not all of them would blend fully into the coastal environment . Visitors to the coastline will generate demand for parking; while the roadway will be adequate for travel, parking may be a major problem unless off-street parking is provided as mitigation. Additional parking is a feature contained in local plans . 90 VIEWS AND VISTAS !II The view from the Ocean and Palos Verdes Drive South towards the hillside will reveal more residential uses which will, to a noticeable degree, detract from a more open natural environment. FINANCIAL =:y3 The adoption of the Redevelopment Plan will result in the potential loss of future property tax revenue to a number of other local taxing agencies over the life of the Project. School Districts have access to State subventions to offset revenue losses. The City has been and is perpetually faced with 'increasing maintenance costs for slide control; A- redevelopment will provide it with a mechanism to fiscally address this problem. If the Project Area were allowed to continue to exist in its present condition, all local agencies would financially lose and the people of the Region and State would eventually lose a valuable coastal resource. The Report to Council contains additional details on financial matters of the Project. 410 91 5 .2 RELATIONSHIP BETWEEN SHORT-TERM USES AND LONG-TERM PRODUCTIVITY The Redevelopment Project does not propose any temporary use of land although individual property owners may have interim uses prior to eventual long-term use--e.g. , agricultural use until converted to residential purposes. All uses eventually established during the life of the Project should have a useful life of at least fifty (50) years. Project implementation would provide short-term employment opportunities for people in construction activities which may create short-term environmental disruption. Refer to Sections 4 .2 and 4 .11. The meaningful implementation of mitigation measures would reduce negative effects to acceptable levels. The adverse impacts created by construction activities would cease upon completion of the activity -and would not negatively influence the maintenance and enhancement of long-term productivity. In both the short-term and long-term, the Project would meet the basic objectives of the Redevelopment Plan by eliminating physical and economic blight--e.g. , landslide and erosion. The long-range goal of the Project is to establish, maintain and enhance the Project Area as a viable segment of the City. This general direction was envisioned in the Community's General Plan. The 41/ implementation of the Project will move the City a step closer towards its goal . Implementation of the Project is anticipated to be a coordinated series of specific actions scheduled over years, rather than one massive short-term effort. Slide stabilization is an early public activity. Any significant delay in the Project will encourage cumulative effects of continued environmental deterioration. As difficult as the task may seem and the great magnitude of corrective action, avoiding a solution to the problem is not an answer . The present environmental condition is well established. The Redevelopment Project is a "tool" to achieve a long-term stable environment; by no means is it the only solution or approach but it is available for local use. 92 6 .0 GROWTH INDUCING IMPACTS The implementation of the City/Agency Redevelopment Plan will establish a setting for additional residential development; it will also enhance upgrading opportunities for established land uses. Land use and population levels would be within the guidelines established in the General Plan. It is anticipated that property values, which have been greatly reduced, will be increased. Implementation of the Plan will result in a more attractive and physically safe residential portion of the City The increased private investment in the Project Area will provide the financial resources to accomplish the expressed goals and otjectives of the Plan. =Beyond an increase in residential units , and the F- services required to meet their needs, growth inducing impacts will be minimal in the Project Area. The Project is in conformance with the City's General Plan. 411 93 7.0 ALTERNATIVES TO THE PROPOSED PROJECT NO PROJECT 410 Essentially this is the alternative which has been followed for nearly three (3) decades . It has resulted in rising maintenance expenses, declining circulation, deteriorated topography, loss of vegetation, considerable erosion, safety hazards, loss of property values and impediments to the implementation of the General Plan and Coastal Specific Plan. The adopted General Plan anticipates additional lower-density residential development in the Project Area; it also envisions reasonable and safe access to coastal resources. This alternative will delay, for an :indefinite time, the formal upgrading of equestrian, F- pedestrian and bicycle facilities as contained in the General Plan. " Hazard Areas" and "Control Districts" have and will continue to be a "normal" approach to major real problems if this alternative is continued to be followed. To do nothing to correct these long-term blighting and safety influences does not provide an effective economic, social or physical solution. Advantages of this alternative include the continuation of an established routine of maintenance and repair with which all individuals and entities have intimate 411 familiarity. It also avoids directly addressing, in a comprehensive manner , a very complex and expensive program of corrective action which does have negative impacts. This alternative is also feasible given the experience gained over nearly thirty (30 ) years; it also continues a unique study and research area for students and natural-resource professionals. The No Project Alternative will perpetuate declining residential clusters in the Project Area and avoid additional increases in population to the Area. Finally, the No Project approach will continue to keep open the City's options for future action; it does not commit the Community to any major long-term solution but extends the current situation. It also does not "capture" the additional property taxes generated by the Project for local use to upgrade this blighted area. The present General Plan is adequate to meet the basic needs of the City for this alternative. This Alternative may lead to eventual closing of Palos Verdes Drive South and limit coastal access. 94 GENERAL PLAN REEVALUATION 411 This Alternative is essentially combined with any of the principal approaches selected as a long-term policy position. The General Plan needs to be reviewed to incorporate any adjustments necessary to mandatory elements. Especially significant are adjustments to land use, housing and safefy. It is suggested that this Alternative be included, in detail, with the mandatory reviews required by State General Planning Law. Environmental documents prepared y by and for local public and private projects could provide a foundation of information for this Alternative This Alternative does not replace but supplements Redevelopment as well as the No Project Alternatives. .� FUNDING OPTIONS N This Approach is also one which supports one of the major Alternatives (Redevelopment or No Project) and should be used in concert with the option selected. It basically states that Redevelopment may be supplemented by other outside financial resources--e.g. , Caltrans, HUD, Coastal Conservancy or other . It assumes that the Redevelopment long-term solution is selected. 411 The No Project Alternative is one which should have the City seek money from outside sources for maintenance of the present status of the Area. These supplementary financial sums are more difficult to secure since it is not a one-time improvement effort. Without a Redevelopment Project, this option becomes vital to any solution taken by local government. ..Y 95 8.0 IRREVERSIBLE AND IRRETRIEVABLE COMMITTMENT OF RESOURCES The Redevelopment Plan is in conformance with the local MP' General Plan and as such provides a long-range view towards improving the arrangement of land use and other resources. The implementation of the Plan will cause approximately three hundred (300) to five hundred (500) acres of Project land to be used for residential Y# purposes;oses; an additional seventy-five (75) to one hundred and twenty-five (125) acres will be needed to provide circulation and associated community facilities . These uses will be irreversible and irretrievable committment of Project Area resources. The freshwater lake (Ishibashi ) recently created in the southeast portion of the Project Area ( just north and adjacent to Palos Verdes Drive South) will be eliminated when this arterial is upgraded and realigned. A considerable amount of valuable vegetation will be disrupted and eliminated from the Project; however , new vegetation will be placed in the Area; it most likely will not replace in variety, location and maturity the material which now exists. Portions of existing beaches and areas along the interface of land and ocean will be significantly adjusted or become an irreversible committment of a 411, valuable resource due to seawalls, rock revetment and/or breakwaters. Much of the natural drainage pattern will be substantially altered such that, along with recontouring of the topography, it will be an irreversible act. 96 s 9 .0 EFFECTS FOUND NOT TO BE SIGNIFICANT 411 Most of the impacts anticipated to occur due to implementation of the Redevelopment Plan are not considered to be significant; however , as previously discussed, there will be effects which will produce environmental damage. These substantial impacts have been previously reviewed and mitigation suggested. In this section, those effects found not to be significant } are briefly stated. The Redevelopment Plan does, when implemented, anticipate a number of temporary and long-term effects on the environment; these impacts do not vary from those which would be expected from the General Plan by accomplishing landslide stabilization. The following elements of Rancho Palos Verdes present environment will :- not be significantly altered in a negative manner by the adoption and implementation of the Redevelopment Plan: * Seismic Hazards * Climate and Air Quality * Energy * Noise * Traffic and Circulation * Solid Waste * Communications * Police and Fire Protection * Educational Facilities * Medical Facilities * Cultural or Archeological * Shopping Employment Refer to the Summary of Action and Consequences (1.0 ) . 410 97 10 . AGENCIES, ORGANIZATION AND PERSONS CONSULTED The Agencies, Organization and Persons listed below were 411 consulted during the preparation of this environmental document:" City of Rancho Palos Verdes Donald F. Guluzzy, City Manager Sharon Hightower, Director of Environmental Services Bill Strausz, Special Counsel Donald R. Winslow, City Engineer/Building Official Alice Bergquist Angus, Associate Planner 4 Charles Abbott, Project Engineer Perry Ehlig, Consulting Geologist Southern California Gas Company . • J. M. Sharp, Planning Supervisor, Western Division County of Los Angeles Office of the Sheriff Elmer A. Omohundro, Captain Commander , Lomita Station Southern California Edison Company Don W. Bailey, Area Manager California Water Service Company James Cantrell, Sr . , District Manager Palos Verdes Peninsula Unified School District Nancy Mahr , Community Relations Los Angeles Flood Control District Elmer Volnogle, Area Maintenance Yard Ivy Rubbish Disposal - Mrs Ron Ivy Los Angeles County Fire Department Solid Waste Regional Control Board Air Quality Control Board, Southcoast California Department of Fish and Game - Gene Tof f o l i California State Lands Commission - Betty Eubanks State Office of Planning and Research - Randy Pestor and Christine Goggin California Department of Mines and Geology - Al Barrows California Department of Transportation - Mary Kelly California Coastal Commission !II California Water Resource Control Board 98 11.0 PREPARER OF AND CONTRIBUTORS TO THIS EIR 411 This Environmental Impact Report was prepared by Urban Futures Incorporated. The following persons contributed to the document: E URBAN FUTURES, INC. Planning, Redevelopment, Finance-Economics and Architecture 140 E. Commonwealth Avenue,Suite 201 n Fullerton, California 92632 Marshall F. Linn, President Gary E. Pivo, AICP Jack Segal, AICP Patricia A. Smith, Word Processing Supplementary Technical Services: Mark Bryant, Converse Consultants Tom E. Morris, Environmental Planner Mark W. Parratt, Biological Consultant 99 12.0 BIBLIOGRAPHY { Arnold, Richard A. Palos Verdes Blue Butterfly Management Plan, 0 1st Draft. 198. Bailey, L.H. 1954. Manual of Cultivated Plants . The Macmillan Co. , N.Y. 1954 . Burt, William H. and Richard 0. Grossenheider . A Field Guide to Mammals. Houghton Mifflin Co. , Boston. 1964 California Air Rsources Board. Guidelines for Air Quality Im.act Assessment: General Develo•rnent and Transportation Projects, Report No RP-83-002. March 1984 . California Air Resources Board. Urbemis #1, The Manual Method. -June 1983. :- City of Rancho Palos Verdes. Capitol Improvement Program, 1984-85 through 88-89 Budgets, Draft. 1984 . City of Rancho Palos Verdes. Coastal Specific Plan. December 1978. City of Rancho Palos Verdes, Environmental Services Department. Condition Survey, Portuguese Bend Landslide Project Area. April 1984 . City of Rancho Palos Verdes. Development Code. 1982, Amended. City of Rancho Palos Verdes. General Plan. June 26, 1975. City of Rancho Palos Verdes Parks and Recreation Committee. Review of Parks Master Plan: Report to City Council and Recommendations for 5-year C. I .P. June 19, 1984 . City of Rancho Palos Verdes, Environmental Services Department , Trail Network Plan, Draft. April 1984 . Crampton, B. Grasses in California. University of Calif. Press, Berkeley. 1974 Dept. of Fish and Game. Critical Animal Species of Los Angeles County. Natural Diversity Data Base, Sacramento, Calif. 1981. Dept. of Fish and Game, Calif. Critical Plant Species and Plant 111112iLALa_o_t_Itaa_LaTtlta_colatx. Natural Diversity Data Base, Sacramento, Calif. 1980. Dawson, Yale E. Seashore Plants University of California Press, Berkeley. 104pp. 1966. 100 Dunne, T. & L.B. Leopold. Water in Environmental Planning, San Francisco, W.H. Freeman & Co. , 1978. Ingles, Lloyd G. Mammals of the Pacific States. Univ. of Stanford Press, Stanford. 1965. Jepson, W. L. Manual of the Flowering Plants of California. Univ. of Calif . Press, Berkeley. 1925. Los Angeles County Flood Control District. Drainage Study Altamira Canyon. January 1978. 7 Munz, Philip A. A Flora of Southern California. Univ. of Calif. Press, Berkeley. 1974. - Palos Verdes Peninsula Unified School District. Long-Range Comprehensive Master Plan. December 1981 Petersen, Roger T. A Field Guide to Western Birds . Houghton Mifflin Co. , Boston. 1961. Raven, P. H. Native Shrubs of Southern California. Univ. of Calif. Press, Berkeley. 1966. Sikand Engineering Associates. Final Environmental Impact Report No. 15, May, 1979. Smith , R. I . Carleton Li•hts Manual of Coastal Invertebrates. Univ. of Calif. Press. 1973. South Coast Air Quality Management District. Air Quality Handbook for Environment Impact Reports . 1980. South Coast Air Quality Management District. Seasonal and Divisional Variation in Air Quality in California South Coast Air Basin. 1980. South Coast Air Quality Management District. Air Quality Trends in California South Coast Air Basin, 1965-1981 . 1982 . South Coast Air Quality Management District. Air Quality Data, 1983. May 1984 . Stebbins, Robert C. A Field Guide to Western Re•tiles and Amphibians. Houghton Mifflin Co. , Boston. 1966. U.S.D. I . , U.S. Fish and Wildlife Service. Threatened Wildlife of the United States. U.S. Gov. Printing Office, Washington, D.C. 1984 . U.S. Environmental Protection Agency, Research Triangle Park , N.C. Com•ilation of Air Pollution Emission Factors (AP-42) , Part B. August 1977. 101 GENERAL • APPENDIX 102 UII3AN FUTURES aCORPORATED III August 16, 1984 Dear Sir or Madam, You recently received a Notice of Preparation of a draft Program EIR from the Rancho Palos Verdes Redevelopment Agency. On August 15 the Redevelopment Agency voted to change the boundaries of the project area. In general, approximately 200 acres of residential properties were removed from the project area. As a result of this action, the Rancho Palos Verdes Redevelopment Agency is hereby resubmitting a revised Notice of Preparation for your review. This Notice supersedes that of August 6, 1984. Please respond within 30 days. The changes in boundaries does not change the attached Project Description, and is not intended as a shift in the program goals or possible activities. Sincerely, • III Gar Sfee E. Pivo Consultant to the Rancho Palos Verdes Redevelopment Agency "'1anni ng/Architecture :onomics-Finance ..ed velopment 1 ommonwealth Ave. "u 01 ullerton,CA 92632 . 14/738.4277 Fullerton 2ncouuer 103 NOTICE OF PREPARATION !II TO: FROM: Rancho Palos Verdes Redevelopment Agency (Lead Agency) 30940 Hawthorne Blvd. y (Address) Rancho Palos Verdes, CA 90274 SUBJECT: Notice of Preparation of a Draft Program • Environmental Impact Report • The Rancho Palos Verdes Redevelopment Agency will be the Lead Agency and will prepare a program environmental impact report :for the project identified below. We need to know the views of your agency as to the scope and content of the environmental information which is germane to your agency's statutory responsibilities in connection with the proposed project. Your agency will need to use the program EIR prepared by our agency when considering your permit or other approval for the project. The project description and location are attached. A copy of the Initial Study is, X is not, attached. Due to the time limits mandated by State law, your response must be sent at the earliest possible date but not later than 30 days after receipt of this notice. Please send your response to Mr. Gary Pivot Urban Futures , Inc. 140 E. Commonwealth Ave, Ste 201 Fullerton CA 92632. We will need the name of a contact person in your agency. PROJECT TITLE: Rancho Palos Verdes Redevelopment Project PROJECT APPLICANT, IF ANY: none DATE _ 81784 Signature Title Consultant to the Agency Telephone (714) 7384277 } Reference: California Administrative Code, Title 14, Sections 15035.7, 15054.3, 15066(c) . Project Description The Rancho Palos Verdes Redevelopment Project involves P ) 1 es the establishment of a redevelopment project area in the portion of Rancho Palos Verdes shown on the attached project location map. The project also includes the a adoption of redevelopment r evelopment plan pursuant to Division 24 of the California Health and Safety Code. 4y The goal of the project is to el imate physical and economic blight in the redevelopment project area through the stabilization of g f hazardous landslides. Possible actions that may be included in the plan include de-watering wells, surface and subsurface drainage, road reconstruction and relocation, seawall construction, wave energy dissipation structures, undergfounding of sewer lines, water lines and other utilities, landscaping, revegetation, beach improvements, housing g rehabilitation and other housing assistance programs. Please note that this g list of possible actions is for illustrative purposes only. The possible actions are not proposed pro 'ects at this time, but only possible P � y p ible actions under the proposed Redevelopment Plan. These actions will be subject to CE QA if and when they become subject y me proposed projects, unless they are !II adequately addressed in the program EIR. 104 * ;` , �,7) • i,,� ��, _ :� r� �� ,-�a �� •, ,•s� -�•[�, . • l ,.‘,0\ ,r l ,d�� �'' 1,....,,,,• M 1.1. ,...., . , , s ;. .040NthImp i _.?, ,/ ..:1,---. /...,.....‘.• 'Awl i et : . . • '''.-- p ) sil \*. • ... :,....-= . D.-c• ..... -RN, „4. . . - ,,,, y ))).0„), 04. •4;1.0.:ei . ) ... . - it kt .•''. . 's 1 - -..,-,, ../.;.,_,1:-..,:b.. c`.. ' 0 ,'..1\k .•44• gig Mil= iv , % ktaW r�•t, ''n . �` •,• /fi�. :�.t p� ;� L1H , Ra•to 1' V /.,,,/l 91 .• ... /• QVAOAANGIE LOCATION f • 9 • � -r'-s-1 •, 1' " e' ▪ - ' , , i e 14t; 9 ... .,I. j.,__=,::=.•..-. •-•‘1 I I/ )l l(6.(.. , : , ,, , - i IL. ( ,,_ • .. _• , ip ., •_1, ,. , ik # . •,,,,„, ,•. i , , t 1.--.. A t‘i „ . , ,si .... ... .,„ ..(A). v '..,.' , • ) 'ivi K/ ),1,-1.. \lip ,,,,,.. -:',i :.,i _ tt 1 ' tf(',�- :..% _ •I•���,�y1\�, •",.,- .., /1.1! • -r / 2 (C? 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'\:,,,/* ' .- Point Vicente - v ._ _ �E� ter. !L�•• _ ;• .7 '', Se a;r; _ l•; r X. k.n, „� ~•. \ COUNTY PARK ' - •• -• ; NupeAp I C , ii• Amb :. _1. • t•P'.. -r3., ) . . .• ''...L.,S. . p ,__ 1 . .-,.- .. •...• .... : Lk., j,• .,,e .16 s‘ •..., . •P ) --. r ,e - •ilt - n M AA I N E LtNIE=te # t •. .. 1'. ' :i ..7.1%,'* •�•+-.' Port ce k! \ \ , • '''...z...:; v`�Jo 'Point Long Point insplrotbn• • � • ,.+ . •' ,Point aPalos Ar ea -T OR 8-2-84. * 1 .24,007 • . • . , . . . i o i o00 �oo0 3000 �000 s000 6000 j `'',' SOUTHERN CALIFORNIA C?C� COMPANY 411 Aug . 10 , 1984 --- 100 EAST NUTWOOD STREET • INGLEWOOD, CALIFORNIA MAILING ADDRESS: BOX 6100, INGLEWOOD, CALIFORNIA 90312 Gary Pivo Urban Futures, Inc. 140 E. Commonwealth Ave. Suite 201 Fullerton, CA 92632 } Subject: Rancho Palos Verdes Redevelopment Project Thi s letter is not interpreted to be inter reted as a contractual commit- ment ' to serve the proposed project, but only as an informa- tion service. Its intent is to notify you that the Southern California Gas Company has facilities in the area where .the P named project is proposed. Gas service to the project above P • ] • be provided without any significant impact on the en- vironment.p . vironme nt The service would be in accordance with the Company' s policies olicies and extension rules on file with the California Public Utilities Commission at the time contract- ual agreements are made. availability of natural gas service, as set forth in The avalla y . tter , is based upon present conditions of gas supply this le . and regulatory policies. As a public utility, the Southern California Company f rnia Gas Com any i s under the jurisdiction of the California f rnia Public Utilities Commission. We can also be by affected b actions of federal regulatory agencies. Should g these agencies take any action which affects gas supply available, or . the condition under which service is , g as service will be P rovided in accordance with revised conditions. We have developed several programs which are available upon e P• selecting the most effect- request to provide assistance in g l i cat i ons of energy conservation techniques for a particular project. If you ive applications desire further information on an y of our energy conservation programs, please contact our Market Services Department for assistance. Yours truly, 1 Sharp, Planning Supervisor Western Division JMS/WEM/dy 105 • , RANCHO PA L S VERDES Mayor JACKI BACHARACH Mayor Pro Tern JOHN C. McTAGGART Councilman DOUGLAS M HINCHLIFFE Councilman MELVIN W HUGHES Councilman ROBERT E RYAN City Manager DONALD F GULUZZY W August 13, 1984 Mr. Garyji vo Urban Futures, Inc. 140 E. Commonwealth Avenue Suite 201 Fullerton, California 92632 Dear Mr. P i vo: The City of Rancho Palos Verdes Public Works Department expects to cooperate fully with the redevelopment agency in its endeavors. Our involvement in 411/ the subject area is limited to public facilities including Palos Verdes Drive South and Abalone Cove Beach Park. For the former, we expect to continue maintenance of the road and look forward to establishing storm drainage under the road to reduce groundwater impact. Therefore, informa- tion on hydrology, groundwater and road alignment will be useful . Sincerely, LL't4A14 Gordon Siebert Director of Public Works gs/ae 106 30940 HAWTHORNE BOULEVARD/RANCHO PALOS VERDES, CA 90274/(213)377-0360 CITY OF LOS ANGELES CALIFORNIA CITY PLANNING ••!;.Yr DEPARTMENT OF COMMISSION V .� _!}.. CITY PLANNING 0 (11111R: .� S61 CITY HALL ANIEL P. GARCIA LOS ANGELES. CA 90012 PRES 10ENT - "r-1-11c. - J. KRUEGER • CALVIN S. HAMILTON VICE•PRESIOENT DIRECTOR STEVE HARRINGTON CARL MASTON SUZETTE NEIMAN TOM BRADLEY MAYOR RAYMOND I. NORMAN - SECRETARY August 20, 1984 3 Mr. Gary Pivo Urban Futures, Incorporated 140 East Commonwealth Avenue, Suite #201 Fullerton,. CA 92632 C0:2 I '∎TS -- NOTICE OF PREPARATION OF A DRAFT ENVIRO":MENTAL IMIPACT REPORT FOR TH: R A':C'!0 PALOS VERDES REDEVELOP! ENT PROJECT Thank you for providing San Pedro (City of Los Angeles) a Notice of Preparation on the subject Draft EIR. The Draft EIR should assess the environmental impacts of any proposed 411/ subdivisions, zone changes, circulation improvements or other changes in intensity of land use (including recreational uses) that may ensue upon completion of the Rancho Palos Verdes Redevelopment Project. In particular, such assessment should focus on any significant change in traffic patterns that may be brought about by this project. Calvin S. Hamilton Director of Planning 1 6"/"'d . GLENN F. BLOSSOM I City Planning Officer General Planning and Deveopment Division GFH:LF cc: Hon. Joan Milke Flores Councilwoman, 15th District 107 AN EQUAL EMPLOYMENT OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER ‘i COUNTY OF LOS ANGELES •e 4 ;• • DEPARTMENT OF COUNTY ENGINEER-FACILITIES •`+ ''r STEPHEN J. KOONCE COUNTY ENGINEER 550 SOUTH VERMONT, LOS ANGELES, CA 90020 • _ BOARD OF SUPERVISORS (213) 738-2011 PETER F.SCHABARUM HIAM BARMACK KENNETH HAHN CHIEF DEPUTY LOS CERRITOS-CENTINELA VALLEY REGIONAL OFFICE EDMUND D. EOELMAN 24320 SOUTH NARBONNE AVENUE DEANEDANA LOMITA, CA 90717 MICHAEL D. ANTONOVICH 534-4860 } • August 21, 1984 Urb i . Futures, Inc. 140 E. Commonwealth Avenue Ste 201 Fullerton, California 92632 Attention: Mr. Gary Pivo Dear Mr. Pivo: RANCHO PALOS VERDES REDEVELOPMENT PROJECT ENVIRONMENTAL IMPACT REPORT The County Engineer no longer acts as City Engineer for the City of Rancho Palos Verdes. Inquiries of an engineering nature should now be directed to the City Engineer, Mr. Don Winslow, who is located at 30940 Hawthorne Boulevard, Rancho Palos Verdes, CA 90274. The County Engineer is willing, however, to provide special engineering studies on an individual contract basis if requested by the City Manager or City Engineer. Very truly yours, STEPHEN J. KOONCE County Engineer t Martin L. Murphy Regional Engineer MLM-dm R-5 Enclosures 108 Q:L1tutf of LIB of theI'ttrtf AfiLinkA-, . 6 . ) aI! of 3uatiri le,. t :fiff .r • � .-+`► ran Anstitcstaliforitia g0012 $MERMAN BLOCK. SMEwiFP ( 21 3 ) 539-1661 PLEA•E*MN TO FILE NO ._4 August 30, 1984 Mr. Gary Pivo Urban Futures , Inc . 140 E. Commonwealth Ave. Sure 201 Fullerton, CA 92632 Dear Mr. Pivo: Your project description is very broad and in your own words represents only "possible actions . " An examination of the proposed Rancho Palos Verdes Redevelopment 411 Project, based upon the description provided, can only be given in equally broad terms . Absent a more detailed estimation of change in the business and residential configuration of the area that will result as a direct consequence of your project, my only consideration is area accessibility for purposes of providing emergency services. Should any alteration of area accessibility as it presently exists occur or should more definitive information relative to business and/or residential configuration become available , prior notification to the Lomita Sheriff' s Station Commander is requested . Such notification is deemed necessary in order that further consideration of the impact on police services can be examined. If I may be of any further assistance, please do not hesitate to contact me. Sincerely, SHERMAN BLOCK, SHERIFF 411 &s4a&L? 2 Elmer A. Omohundro, Captain Commander, Lomita Station 109 T4 Southern California Edison Company 505 MAPLE AVENUE F.O. BOX 2944 TORRANCE. CALIFORNIA 90509 DON W. BAILEY AREA MANAGER September 5, 1984 3 Mr. Gary Pivo Urban Futures, Inc. 140 E.- Commonwealth Ave. Suite 2 01 Fullerton, CA 92632 Re: Rancho Palos Verdes T - Redevelo ment P`reject Dear Mr. Pivo: Within the current boundaries of the ro osed Ra 411 ncho p echo Palos Verdes Redevelopment Project area, the Edison Company does not have any fee-owned property. In the project description, it states that the subject ject is .�ect,pro- ject to eliminate physical and economic blight in the project area through land stablization g anon measures. Possible actions include undergroundin of lines,g sewer Ines, water lines other utilities.. If this should occur with electric face sties, any under roundin of g g E ddson s electric facilities will be done in accordance with the ap- plicable rules, regulations, and tariffs f f s currently on file the California Public Utilities Commission such under roue i � In addi- tion, g d ng shall be done using sound engi- neering practices.as determined by i g y E d son and the City of Rancho Palos Verdes at the time of construction. If it is necessary to relocate any existing • bution facilities y g electric dlstri- R= litres which are located on easement, relocation costs would be the responsibility • cation p ility of. the Redevelopment Agency. New easements would be required for placement prior g p acement of p or to any relocation occurring. 110 110 wY; Southern California Edison Company 1=Crits, 505 MAPLE AVENUE P.O. BOX 2944 • TORRANCE, CALIFORNIA 90509 DON W.BAILEY AREA MANAGER If an ou have additional questions regarding the above y any information, please contact me at (213) 320-7560. #-,t) ON W. BAILEY DWB/j w 410 r► 111 WASTEWATER SECL•MAt1ON • - ti, •., . COUNTY SANITATION DISTRICTS i"'-:" w O F LOS ANGELES COUNTY 1955 Workmon Mill Rood / Whittier, Californio 9 ,CHARLES W. CARRY Mailing Address: / P. 0. Box 4998, Whittier, California oorno 90607 ,;-z �'' Telephone: (213) 699-741 1 / From Los Angeles (213) 685-5217 Chief Engineer and General Manager September 5, 1984 , ; File No. 31R-101.13.10E Mr. Donald F. Guluzzy, Executive Director Rancho Palos Verdes Redevelopment Agency 30940 Hawthorne Boulevard Rancho Palos Verdes, California 90274 Dear Mr. Guluzzy: Redevelopment Plan for Project Area No. 1 This is in reply to your letter of August 17, 1984 with which you forwarded plans for the subject project. We offer the following comments: There is not enough information given (e.g. square footage and kinds of buildings to be built in the project area) to determine the impact of the redevelopment. The Districts would also need to know what buildings are being replaced. When final plans of the project are available, please forward two copies to this office for review. If you have any further questions, please contact the undersigned at (213) 699-7411, Extension 350. Very truly yours, Marvin Holmes Project Engineer Planning Section MH:alt ///// -fr7oy: T S. c R /L7 7 /Y• Y RECEVED 410 SEP 7 1984 Ct. 0--e--re, CF S. RANCHO CITY PA�OC 1� tRD�S 112 1 • C The Metropolitan Water District of Southern California );r 71t•r.11 M.ltl.'.i;('r September 6 , 1984 Urban Futures , Inc. 140 E. Commonwealth Avenue Suite 201 Fullerton, California 92632 Attention Mr. Gary E. Pivo Consultant of x Rancho Palos Verdes Redevelopment Agency Gentlemen: Project Area No. 1 Rancho Palos Verdes 411 Thank you for your letter dated August 16, 1984 , transmitting a revised Notice of Preparation covering Redevelopment Project Area No. 1 of the Rancho Palos Verdes Redevelopment Agency. There are no existing Metropolitan Water District facilities within the boundaries of the project area, which is within the Original Area of West Basin Municipal Water District, a member public agency of Metropolitan. Should consultation regarding this redevelopment project be necessary, you may contact Mrs . Ann Marie Yang of our Controller's Office, telephone (213) 250-6478 . We appreciate your cooperation in keeping us informed. Very truly yours,, c. A. -ate Frank Aranda Senior Engineering Technician RKY/DLH/lh 1111 Sunset Boulevard,Los Angeles,Calif. • Mailing address:Box 54153,Los Angeles,Calif.90054 • Telephone:(213)250-6000 113 410 - IOUTHERfl CALIFORflIR ._ Rh/OCIRTIOR OF GOVERflEflTI 600 !ouch Commonwealth Avenue •Juste 1000•Lo, Angeles•California•90005.213/385-1000 DATE: September 12, 1984 . TO: Mr. Gary P i vo Urban Futures, Inc. r 140 E. Commonwealth Avenue, Ste. 201 Fullerton, CA 92632 FROM: Metropolitan Clearinghouse SUBJECT: RANCHO PALOS VERDES REDEVELOPMENT PROJECT SCAG FILE NO. LA-32388-NP Thank you for submitting the Notice to Prepare the environmental document for the referenced project for SCAG review. SCAG staff does not have comments et this time but looks forward to reviewing the environmental document when available. Sincerely . / A/ WENDY A./ URPHY Clearing ouse Official WAM:wp6 410 114 LOS ANGELES COUNTY FLOOD CONTROL DISTRICT, v40411W -'ft 0 SUBDIVISION REPORT, rrfrrtr"rr 0 FLOOD HAZARD REPORT r� File No. 2-1-5r3-14---24-51.-31÷ 1.21 •`�� Jo LAND USE REPORT Review of Notice of Preparation of a Draft Program Environmental Impact Report- Rancho Mr. Gary Pivo P.V. Redevelopment -- Portuguese Bend Ur an Futures, Inc. Map or Transmittal Letter Date 14o East Commonwealth Avenue 8.17-84 Suite 201 Fullerton, CA 92632 Assignment No. 37A 1. This area is outside the boundaries of the Flood Control District and not under its jurisdiction. 2. The Flood Control District has no requirements for this subdivision/applicatian. 3. The subdivision/Site is reasonably free of flood hazard from major channels and streams, but may be subject to local flood hazard. Refer to the report of the City/County Engineer concerning local drainage. X 4. Portions of the subdivision/site lying in and adjacent to (x) steep hillsides, (x) natural watercourses, (X) n r f rnn t _are subject to flood hazard because of (X) tidal/wave action, (d overflow, (x) erosion, bc) mudflow and/erdeposition of debris. Refer to the report of the Ci ty/6ount Eng ineer concerning local drainage requirements. S. This project will not significantly affect the environment as far as the District's interests are concerned. _ 6. Place a note of flood hazard on the final map/grant of waiver and submit engineering documentation to support those limits. 7. Prior to recordation of the final mmp/grant of waiver, adequate engineering doc ui entatian crust be submitted torments 1. All existing and proposed drainage facilities should be identified and h s awn on a detailed exhibit of this area. 2. A before and after improvements hydrology study should be re red. P Pa 3. Both surface and subsurface water may adversely .effect this area from a geological and soils standpoint. This problem should be investigated and discussed in the environmental impact report. Informat ion relative to the above cannents may b4 obtained contacting: - Y by ng- E eering Investigator J/" Telephone ( 13) 26-4324 Approved ...' /31tri 1, Date of Report Development Regulation Sect ion , 115 ::2133 ,CO 1/a4 • STATE OF CALIFORNIA—THE RESOURCES AGENCY GEORGE DEUKMEJIAN, Governor DEPARTMENT OF FISH AND GAME •: Marine Resources Region 4115 West Broadway, Suite 350 ng Beach, California 90802 (213) 590-5117 September 14 , 1984 7-71 LJ Mr. Gary Pivo Urban Futures, Inc. 140 E. Commonwealth Ave. , Suite 201 Fullerton, California 92632 Dear Mr. Pivo: The Notice of Prepartion for a Draft Program Environmental Impact Report (SCH 84081511) for the elimination of physical and economic blight in the Rancho Palos Verdes Redevelopment Project area through the stabilizatior of hazardous landslides has been reviewed. Because the proposed actions which may be included are general in nature we recommend that the document to be prepared contain 110 the following information which is necessary for reviewers to asses the accuarcy of identified impacts and measures necessary to offset or minimize significant impacts. A. A description of existing fish and wildlife resources and habitats' within and adjacent to the project area. Aisurvey of terrestrial and aquatic (both freshwater and marine) habitats with a description of flora and fauna which utilze the various habitat types is necessary. This could consist of a physical on site survey or a re- view of pertinent literature which describes resources within the project and adjacent areas. B. Impacts to resources from various possible actions as outlined in the Notice of Preparation. Because the actions outlined are general in nature we are unable at this time to identify specific impacts. We are however concerned with potential impacts to intertidal and subtidal marine habitats and resources which may result from seawall and wave energy dissipation structures , beach improvements, grading and other measures. We are also concerned with potential impacts to terrestrial habitats and resources from grading, landscaping, revegetation and mesures which may affect surface and subsurface drainage. 411 116 Gary E. Pivo 17 Sept. 1984 Urban Futures, Inc. 411 140 E. Commonwealth Ave. Suite 201 Fullerton, CA 926.32 Re: Notice of Preparation of a Draft Program Environmental Impact Report - Rancho Palos Verdes Redevelopment Project Dear Mr. Pivo, I have been asked to comment on the above referenced project. I have been away and only today had a chance to review the information sent to me. First, let me explain that I no longer am affiliated with the UCLA Department of Anthropology, the Archaeological Survey or any other branch of the University. Since Sept. 1980 I have been employed with the California Department of Transportation in San Diego. Future correspondence regarding this project should be directed to: Dr. David S. Whitley Chief Archaeologist Institute of Archaeology University of California Los Angeles, CA 90024 • I would like to comment on the proposed redevelopment area as an archaeologist who is very familiar with the cultural history of the peninsula. I have been involved in the excavation and report preparation for three sites in the peninsula, and as my in-laws live only two miles west of the project area, I have spent a good deal of time hiking around in the area. Under CEQA guidelines the project area must be assessed for "unique" archaeological resources. At Caltrans we do not operate under State law but follow Federal regulations. An analogy would be the determination of whether there are any cultural resources in the project area which would qualify for inclusion on the National Register of Historic Places. How is such an assessment made? First, an inventory must be done to determine what is present within the project limits. This is done through archival research and in-field reconnaissance. For the purposes of project planning, i.e., site avoidance mostly, it is best to know what is in the project area as early as possible. The Palos Verdes Peninsula has a rich and diverse f cultural history, so I believe it is of paramount importance to begin by determining just exactly what resources are extant within your project limits. If I can be of any further assistance please do not hesitate to • contact me. My new address is listed below. Thank you for the opportunity to comment on this project. Since 1 , Marty Rosen � 7226 Viar Ave. San Diego, CA 92120 117 ---L� cc: Dr. Whitley, UCLA • JOHN W. ENGLUND ACTING FIRE CHIEF FORESTER & FIRE WARDEN • COUNTY OF LOS ANGELES September 18, 1984 FIRE DEPARTMENT POST OFFICE BOX 3009. TERMINAL ANNEX LOS ANGELES. CALIFORNIA 90051 267 -2481 Gary E. Pivo Consultant to the Rancho Palos Verdes Redevelopment Agency Urban Futures, Inc. 140 East Commonwealth Ave., Suite 201 Fullerton, CA 92632 Dear Mr. Pivo: SUBJECT : RANCHO PALOS VERDES REDEVELOPMENT PROJECT This subject has been reviewed by our Department and the enclosed reports from the Fire Protection Planning, Fire Protection Engineering Sections, and the Forestry Division respond to those areas which affect Fire Department responsi- bility and operation. Very truly yours, JOHN W. ENGLUND , ACTING FIRE CHIEF 14P-441114:17?2700;41;0r, 4.:1;0; By ROBERT E. JOHNSON HEAD DEPUTY FORESTER FORESTRY DIVISION REJ:sd SERVING THE UNINCORPORATED AREAS OF LOS ANGELES COUNTY AND THE CITIES OF: AGOURA HILLS BRADBURY ARTESIA CARSON AZUSA CERRITOS BALDWIN PARK CLAREMONT B ELL COMMERCE B ELLFLOWER CUDAHY BELL GARDENS DUARTE GLENDORA HAWAIIAN GARDENS HIDDEN HILLS HUNTINGTON PARK INDUSTRY IRWINDALE LA CANADA FLINTRIDGE LAKEWOOD LA MIRADA LANCASTER LA PUENTE LAWNDALE LOMITA MAYWOOD NORWALK PALMLTALE PARAMOUNT PICO RIVERA RANCHO PALOS VERDES ROLLING HILLS ROLLING HILLS ESTATES ROSEMEAD SAN DIMAS SIGNAL HILL SOUTH EL MONTE SOUTH GATE TEMPLE CITY WALNUT WESTLAKE VILLAGE WHITTIER 118 September 18, 1984 SUBJECT: RANCHO PAIRS VERDES REDEVELOPMENT PROJECT In reply to your request for information germane to our responsibilities in connection with the Rancho Palos Verdes Redevelopment Project, the following areas of our responsi- bility include but are not limited to: 1. Erosion control and/or low fuel volume plants 2. Species selection for Revegetation Projects 3 Brush Ordinance 4. Oak Tree Ordinance 5. Endangered Plant Species 6. Wildlife Habitat Species If you have any further questions, please contact me at (818) 347-1904. By 14 CLYDE IMS DEPUTY FORESTER FORESTRY DIVISION PREVENTION & CONSERVATION BUREAU CS:sd ID 119 August 17, 1984 4'F is is SUBJECT: RANCHO PALOS VERDES REDEVELOPMENT PROJECT Our review of the subject indicates no adverse effect to fire protection if standard fire department requirements for fire hydrants , water mains, fire flow, access, and design are met. Fire flows of 1250 gpm to 5000 gpm will be required depending upon the type of construction used. Hydrant spacing shall be 300 feet or 600 feet depending on occupancy type. Should any questions arise regarding this matter, please feel free to contact Captain Peskett at (213) 267-2467. 111 I , By . ; - 4 ROBERT P. BLACKBURN BATTALION FIRE CHIEF FIRE PROTECTION ENGINEERING " PREVENTION & CONSERVATION BUREAU 410 120 4" August 23, 1984 - SUBJECT: RANCHO PALOS VERDES CRA, GROUND STABILIZING PROJECT v»- Our consideration of the impact on fire protection of the proposed development is based on the current level of service available within the general area. Any impact on fire protection is based on the current level of service. Additional manpower and equipment may be re- quired as_the need arises . The subject development will receive fire protection from the County of Los Angeles Fire Department. Fire Station 53, located at 6124 West Palos Verdes Drive South, Rancho Palos Verdes, CA 90274, is the jurisdictional engine company for this property. DISTANCE RESPONSE TIME MANPOWER 0 EQUIPMENT (MILES) (MINUTES) (0 OF MEN) Engine 53 1 2 .5 3 Engine 106 6 9 3 Engine 83 4 6 3 Truck 106 6 9 3 R/S 106 6 9 2 Patrol 83 4 6 1 This Department has been informed that this proposed development will be a community redevelopment area. In- creased fire protection needs resulting from development and the division of taxes creates a financial burden on fire fire protection; therefore, the district requires full pass- - through of all tax increments due the district. The subject development is totally within the boundaries of the Consolidated Fire Protection District. IP / By ./ 'M_! 0i1 ' . , ' IN CHI 'A FIR L7 PROTECTION PLANNING ADMINISTRATIVE BUREAU 110 121 STATE OF CALIFORNIA GEORGE DEUKMEJIAN,Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL B ANGELES REGION -OUTH 6 ROADWAY,SUITE 4027 ANGELES,CALIFORNIA 90012-4596 -• '' (213)620-4460 September 18, 1984 Sp 21 9 • n4 .771 ti Mr. Gary Pivo Rancho Palos Verdes Redevelopment Agency 30940 Hawthorne Blvd. Rancho Palso Verdes, California 90274 NOTICE OF PREPARATION OF A DRAFT ENVIRONMENTAL IMPACT REPORT FOR RANCHO PALOS VERDES REDEVELOPMENT PROJECT. SCH NO. 84081511 r The subject document concerns the proposed redevelopment project for the City of Rancho Palso Verdes. The following topics are of concern to this Regional Board , and should be included in the DEIR: 1 . Description of the proposed redevelopment project. 410 2. Description of the present use of the project site. 3. Discussion of the measures proposed to minimize water quality impacts resulting from soil erosion. 4. Description of any proposed modifications to the sanitary- sewer system. The quantities of wastewaters to be contributed to the sanitary sewer system and the treatment plant to serve the proposed development should be identified. The DEIR should demonstrate that the sanitary sewer system will have adequate capacity to collect, transport, treat, and dispose of the additional now in a satisfactory manner. The cumulative impacts of this and other projects on the sanitary sewer system should be considered. 5. Description of the quantity, quality, and location of discharges other than to the sanitary sewer system. This would include the discharge from de-watering wells. 6. Description of the proposed wave energy dissipation structures. The impact of these structures on the marine environment should be discussed. 122 411 The discharge of wastewater other than to the sanitary sewer system may be subject to waste discharge requirements prescribed by this Regional Board. Sufficient information should be provided at least 180-days prior to the discharge so that we may determine the need for requirements. If you have any questions, please call Taira Yoshimura at (213) 620-4460. LEWIS A. SCHINAZI, Ph Environmental Speciali t IV cc: State Clearinghouse Attn: Chris Goggin Office of Planning and Research Attn: Randy Pes for, Project Coordinator 123 rieneral Telephone Company of Calfomla am CORRESPONDENCE REPLY FOAM OA IM02 woo ATE ,etineteir _/ I984 In rrpfy refer lo.: TO 11/PBR/Y KIT • RC Code , 3770 jiD E. 60016010.EAL711 AM" . FMS No. , E3.3 .SU/Te g p 1 _ :s, F8II -KwN XTD , 4721,3,a ATTN: , 6.4i 'Y P/YO REF. t :K.. 'C pclivezarnarr Fee- r-t- ,. Gentlemen:. We are sending you QI Attached 0 Under separate cover the following: 0 Preliminary QI Prints Copy of Letter 0 Final O Transparencies 0 Estimates 0 Revised O Specifications 0 COPIES DWG.# DESCRIPTION The above are submitted: 0 For Approval O For Review&Comment O roved as Noted ed 0 As Requested O With Your Corrections 0 0 For Your Use 0 With Our Corrections 0 Additional Information PT ) —642-431/ . . , Very Truly Yours al4Ilt�.3 E. FRANCIS RC.377 •. ifNam. -t 2-W04 Title Outside Plant Construction Coordinator dress P.O. Box 500 Long Beach,California 90801 12 4 Phone (213)435-9373 0 TECHNI CAL APPENDIX • 125 aA RANCHO PALOS VERDES REDEVELOPMENT AGENCY DESCRIPTION OF BOUNDARIES • { T' REVISED AUGUST 31, 1984 • 126 DESCRIPTION OF REDEVELOPMENT DISTRICT, of Ranh Palos Verdes, Count y of Los Angeles, A parcel of land in the City o Rancho . y State of California, including l udi n therein Parcels 88, 104, 105, 109, 110, 116, S � 9 P ortions of Parcels 69, 70,124, 125 126 and 117, 118, 119, 120, 121, 122, 123, 72, 73, 74, 89, 90, 103, 106 and 115 and a portion of Palos Verdes Drive South, and a P ortion of Crenshaw Boulevard as shown on Map of Lot "H" of the Rancho Los Palos Verdes, as shown on Los Angeles County Surveyor Map C.S.B.-1879, Lots 1 5,through 5 inclusive, 25 through 40 inclusive, 84, 85 and 86, 107 through 118, i and of Dauntless Drive inclusive, portions Drive, Exultant Drive, Admirable Drive, and portion of Palos Verdes Drive South, of Tract No. 22835 as shown on map filed in book 603, pages 62 through 65 inclusive, of Maps; all of Tract No. 20352 as � Pa • P 9 9 shown on map filed i n book 523, page 50, of Maps, all of Tract No. 14195 as 0 a►P . P 9 P shown on map filed in book 323, pages 8 through 10 inclusive, of Maps, all of Tract No. 13836 as shown on map filed in book 416, page 19, of Maps, all of Tract No. 14500 as shown on map filed i n book 322, pages 38 through 41 inclu- sive, P 9 of Maps, all of Tract No. 14118 as shown on map filed in book 306, pages 34 and 35, of Maps, and all of Tract No. 22635 as shown on map filed in book 601, page 100, of Maps, all in the office of the Recorder of said County and described as a whole as follows: Beginning in the Southeasterly corner of Lot 51, Tract No. 31617 in said City, County and State as per map filed in book 888, pages 4 through 8 inclusive, of 410 P 9 • Ma P s in the office of said Recorder; thence Northerly and Northeasterly along 0 the Southeasterly rl line of said Tract No. 31617, North 7° 08' 15" East, 691.29 feet; t • thence North 446 .191 30" East, 270.00 feet; thence North 56° 30' 00" East, 455.63 feet; thence North 31° 30' 00" East, 493.98 feet; thence North 49° 29' • East, 284.84 feet, more or less, to the Northeasterly terminus of that. cer- tain course therein shown on Tract No. 38848, in said City, County and State as per map filed in book 1017, pages 8 through 14 inclusive, of Maps, in the office of said Recorder, as having a bearing and length of "North 3° 22' 17" East, 175.29 feet"; thence Southerly and Easterly along the Westerly and Southerly lines of said Tract No. 38848, South 3° 22' 17" East, 175.29 feet, thence South 3° 16' 25" West, 221.02 feet; thence South 36° 07' 45" East 198.03 feet; thence North 81° 33' 40' East 253.27 feet; thence North 65° 49' 10" East, 180.74 feet; thence South 71° 01' 50' East, 131.22 feet; thence North 59° 47' 25" East, 179.85 feet; thence South 46° 25' 00" East, 162.33 feet; thence North 77° 32' i0" East, 313.51 feet; thence North 26° 31' 45" East, 215.53 feet; thence North 44° 41' 20' East, 281.06 feet; thence South 3° 08' 25" East, 198.30 feet; thence South 24° 05' 25' East, 101.14 feet; thence departing from said Southerly boun- dary of Tract No. 38848, South 40° 48' 38" East, 536.76 feet, more or less, to the Northerwesterly boundary of Tract No. 32110, in said City, County and State, as per map filed in book 935, pages 47 through 51 inclusive, of said Maps; thence Southwesterly, Southeasterly, and Easterly along said last mentioned Northwesterly boundary, and along the Southwesterly and Southerly boundaries of said Tract No. 32110, South 33° 41' 29" West, 303.29 feet; thence South 39° 50' 08" East, 481.89 feet; thence South 64° 47' 37" East, 252.34 feet; thence South 81° 43' 04" East 79.83 feet; thence North 82° 29' 46" East 174.24 feet, more or 127 less, to the Southeasterly prolongation of the course described herein as "South 40° 48' 38" East, 536.76 feet"; thence South 40° 48' 38" East, along said 411/ prolongation, 328.43 feet, more or less, to the Southwesterly terminus of that certain course in the Northwesterly boundary of Parcel 73 of said Lot "H" shown • z on said C.S.B.1879 as having a bearing and length of "South 45° 23' 30" West, =R 9 663.33 feet"• thence Northeasterly and Easterly along said last mentioned Northwesterly boundary, and along the Northerly boundary of said Parcel 73 North 45° 23' 30" East, 663.33 feet; thence North 83° 29' 00" East, 1000.00 feet; thence South 79° 48' 20" East, 864.35 feet, more or less, to the Southwesterly M prolongation of the Southeasterly boundary of said Tract No. 24817; in said City,t County and State, as shown ,on map filed in book 661, pages 79, 80, and 81 y, y � aP .of said Maps; thence Northeasterly along said Southeasterly boundary of Tract No. 24817, North 62. 21' S0" East 465.59 feet; thence North 77. 01' 30" East, 136.11 feet; thence North 69° 08' 40" East, 264.37 feet, more or less, to the ;before mentioned Northerly boundary of Parcel 73; thence Easterly along said Northerly boundary of Parcel 73 and the Northwesterly boundary of Parcel 72 of said Lot "H," North 83° 29' 00" East 513.29 feet, to the Easterly prolongation of the Northerly line of said Tract No. 24817; thence Southeasterly along said prolongation of said Northerly line South 59° 18' East, 160.78 feet, more or less, to the Westerly line of Lot 14 of Record of Survey as per map filed in book 57, pages 35 and 36 of Records of Surveys in the office of said Recorder; thence Southwesterly and Southeasterly along the Westerly lines of said Record of Survey 57/35, 36, South 30° 42' 00" West, 196.02 feet; thence South 20° 41' 35" East, 231.12 feet; thence South 36° 14' 45" East, 329.83 feet; thence South 15° 56' 55" East, 188.89 feet; thence South 45° 23' 35" West, 217.79 feet; thence South 21° 09 40 Ea st, 569.87 feet; thence South 38. 48' 40" East, • 5" East 128.49 feet more or less, to the 366.24 feet; thence South 60 46' 2 Northweste r ly corner of Lot 17 of Record of Survey as per map filed in book 57, pages 4 through 8 inclusive, of Reco rd of Surveys in the office of said Recorder; thence Southwesterly along the Northwesterly lines of said Record of Survey 57/4 8, South 31• 35' 00" West, 162.03 feet; thence South 32° 53' 55" • 5" West, 87.96 feet; thence South 49• � u West, 255.47 feet; thence South 23 28' 2 , 36' 5 5" West, 418.81 feet; thence South 47° 49' 00" West, 301.44 feet, to the most Westerly corner of Lo t 24 of said Record of Survey 57/4 - 8; thence along r of the City t of Rolling Hills, South 21° 57' S0" West the Southwesterly boundary y 9 338.18 feet;8.18 feet thence South 41° 38' 00" West 240.83 feet; thence South 10° 33' 20" East 510.80 feet; thence • South 28° 58' 52" East 522.07 feet; South 18° 36' 00" East 130.53 fee t; thence South 57° 01' 22" East 235.00 feet; thence North 43° t244' 56" East 1007.13 feet, more or less, to the Southwesterly line of Lot 37 of Record of Surve y 57/4 - 8; thence along the Southwesterly line of Lot 37 of said Record of Survey 57/4 - 8, South 41° 27' 50" East, 225.46 feet, to the most Southerl y corner of said Lot 37; thence South 20° 53' 08° West, 849.68 feet; thence South 24° 10' 02" West, 172.97 feet; thence South 39° 43' 42" West, 167.81 feet; thence South 44° 01' 38" West, 152.29 feet; thence South 37° 42' 51" West, 184.77 feet; thence South 24. 50' 17' West, 191.83 feet; thence South 0° 25' 14" East 465.81 feet, more or less, to the Northwesterly corner of Lot 41 of Tract No. 22835 as shown hown on map filed in Book 603, pages 62 through 65, inclusive, of Maps, in the office of said Recorder; thence South 18° 06' 21" West, 130.00 feet along the Northwesterly line of said Lot 41 to the Northeasterl y line of Dauntless Drive as shown on said Tract No. 22835; thence 128 Southeasterly along said Northeasterly line South 71° 53' 39" East, 164.41 feet, to the Northerly prolongation of the Northwesterly line of Lot 83 of said Tract No. 22835; thence Southwesterly along said prolongation of said Northwesterly MP line South 18° 06' 21" West, 193.00 feet to the Northeasterly line of Lot 86 of said Tract No. 22835; thence Southeastly and Southwesterly along the North- easterly d Southeasterly lines of said Lot 86, South 71° 53' 39" East, 51.70 .Y y feet; South 18° 06' 21" West, 42.38 feet; South 53° 10' 10" West, 120.00 feet to the Northeasterly line of Exultant Drive as shown on said Tract 22835; thence Southeasterly along said Northeasterly line, South 36° 49' S0" East, 62.57 feet, to the Northeasterly of the Northwesterly line of Lot 106 of said y Tract No. 22835; thence Southwesterly along said prolongation . of said Northwesterly line South 53° 10' 10" West, 169.00 feet, to the Northeasterly :line of Lot 118 of said Tract No. 22835; thence Southeasterly and Southwesterly 'along the Northeast and Southeast lines of said Lot 118 South 36° 49' 50" East, 76.31 feet; thence South 53° 10' 10" West, 115.00 feet to the Northeasterly line of Admirable Drive as shown on said Tract No. 22835; thence South 36° 49' 50" East, 46.50 feet along *said Northeasterly line of Admirable Drive to the pro- longation of the Northwesterly line of Lot 24 of said Tract No. 22835, thence South 53° 10' 10" West, 175.00, along said prolongation of said Northwesterly line to the Northeasterly line of Lot 4 of said Tract No. 22835; thence South 36° 49' 50' East, 132.00 feet, along the Northeasterly lines of said Lot 4 and lot 5 of said Tract No. 22835 to the Southeasterly line of said Lot 5; thence South 53° 10' 10" West, 115.00 feet, to the Northeasterly line of Palos Verdes Drive South as shown on said Tract No. 22835; thence continuing along the pro- lon ation of said Southeasterly line of Lot 5, Sou th 53° 10' 10" West, 132.00 to the Southwesterly line of said Palos Verdes Drive South; thence South feet, o y 40° 54' 37" _West, 804.23 feet more or less, to the mean High Tide line of the Pacific Ocean er Los Angeles County Surveyor Map, C.S.B. 1858; thence North 16° P 00' West 4 00 feet; thence North 32° 10' 00" West, 178.00 feet; thence 00 00 Wes 1 9. feet; North 45° 00' 00" West, 275.00 feet; thence North 48° .20' 00" West, 310.00 feet; thence North 46° 19' 15" West, 240.25 feet; thence North 78° 20' 00" West, { 204.64 feet; thence North 69° 06' 15° West, 200.19 feet; thence North 55° 46' 45" West, 482.54 feet; thence North 62° 03' 50" West, 26.22 feet; thence North 62° 03' S0" West, 365.51 feet; thence North 84° 10' 00" West, 112.00 feet; thence South 49° 50' 00" West, 110.00 feet; thence South 89° 30' 00" West, 278.00 feet; thence South 72° 00' 00° West, 70.00 feet; thence South 7° 00' 00" West, 94.00 feet; thence North 82° 43' 35" West 209.71 feet; thence South 80° 50' 00" West, 279.00 feet; thence South 65° 00' 00" West, 220.00 feet; thence South 31° 00' 00" West, 92.00 feet; thence South 6° 55' 00" West, 449.55 feet; thence South 38° 30' 00" East, 69.00 feet; thence South 17° 50' 00" West, 173.00 #feet; thence North 79° 30' 00" West, 73.96 feet; thence North 2° 17' 05° East 107.15 feet; thence South 15° 36' 50" West, 110.90 feet; thence North 85° 10' 00" West, 219.00 feet; thence North 43° 00' 00" East, 100.00 feet; thence South 60° 00' 00" West, 168.00 feet; thence North 12° 10' 00" West, 92.00 feet; thence North 22° 13' 35" East, 197.85 feet; thence North 59° 50' 00" West, 58.00 feet; thence North 83° 20' 00" East, 70.00 feet; thence North 0° 45' 00" West, 339.00 feet; thence North 48° 30' 00" West, 274.00 feet; thence North 63° 00' 00" West, _ 142.00 feet; thence North 88° 16' 40" West, 254.89 feet; thence North 58° 50' 00° West, 58.00 feet; thence South 76° 20' 00" West, 229.00 feet; thence South 61° 20' 00" West, 130.00 feet; thence South 20° 10' 00" West, 207.00 feet; 129 thence South 43° 50' 00" West, 234.00 feet; thence South 28. 15' 15" East, 187.37 feet; thence South 27° 40' 00" West, 130.00 feet; thence North 66. 30' 00' West, 223.00 feet; thence North 31° 40' 00" East, 108.00 feet; thence South 60. 11' 50" West, 196.11 feet; thence North 66. 30' 00" West, 210.00 feet; thence North 6° 50' 00" West, 283.00 feet; thence North 37° 40' 00" East, 128.00 feet; thence North 11. 11' 55" East, 224.75 feet; thence North 16° 00' 00" West, 240.00 feet; thence North 36° 40' 00' West, 118.00 feet; thence North 43° 50' 00" West, 178.00 feet; thence North 50° 36' 40" West, 293.33 feet; thence North 57. 30' 00" West, 90.00 feet; thence North 76° 10' 00" West, 113.00 feet; thence North 58°�30' 00" West, 460.00 feet; thence North 65° 54' 35" West, 450.24 feet; R thence North 61. 15' 00" West, 103.00 feet; thence North 73° 20' 00" West, 160.00 feet; thence North 78° 00' 00" West, 242.00 feet; thence North 84° 55' 50" West, 165.92 feet; thence South 76° 45' 00" West, 232.00 feet; thence South 83. 04' 25' West, 754.70 feet; thence South 67. 00' 00" West, 108.00 feet; thence South 36° 58' 25" West, 220.60 feet; thence South 68° 00' 00" West, 410 240.00 feet; thence South 36° 30' 00" West, 84.54 feet, more or less, to the prolongation of the Southwesterly line of Lot 14 of Tract No. 14649 as shown on maps filed in Book 345, pages 23 through 26, inclusive, of Maps, in the office of said Recorder; thence North 40° 30' 00" West, 126.90 feet, to the Southwesterly corner of said lot 14; thence along the Southeasterly line of said Tract No. 14649 North 62° 32' 20" East, 310.27 feet; thence North 43° 44' 20" East, 180.91 feet; thence North S0° 47' 30" East, 271.47 feet; thence North 78° 07' 15" East, 365.44 feet; thence North 11° 45' 50" West, 90.00 feet; thence North 33° 14' 10" East, 110.00 feet; then leaving said line of Tract No. 14649, North 74. 24' 45" East, 100.00 feet; thence North 88° 35' 10° East, 129.02 feet, i more or less, to the Easterly line of Parcel 106 of said Lot "H"; thence North 4° 49' 30" West, 392.05 feet; thence North 19° 41' 13" East, 167.23 feet, to the Southerly line of Palos Verdes Drive South as shown on said C.S.B.-1879; thence North 1° 37' 23" West, 53.57 feet, to the Southeasterly corner of Lot 87 of said C.S.B.-1879; thence Northerly along the Easterly line of said Lot 87, North 1 41' 10" East, 695.88 feet; thence North 37° 27' 29" East, 177.04 feet; thence North 11° 37' 40" West, 232.27 feet; thence North 43° 52' 40" West, 415.28 feet; thence North 0° 35' 45" East, 1314.12 feet; thence North 52° 29' 58" East, 1065.62 feet more or less, to the point of beginning. 1110 f 130 ...,__________________. , . .. RANHO PALOS VERDES REDEVELOPMENT AGENCY , PROJECT AREA el , CITY OF RANCHO PALOS VERDES . Ni . N - • •-• -) 7\1 E 'Ail4.--r ' , It: .,......,,, . • CITY LIMITS • yfoft„.*Mta"----b._/7"""1"1":".i..lievir S - • �, � • :•,..,•-�.: . ._• •, - CITY OF ^,-•••__ - '• i :+ -- --.�:--, • ; _':■r_• ROLLING HILLS . � �-_7�.._ •,• • ?KO- JE CT, LIMITS - - • • i `V.."---/-•,-•-•..,_ • , _.,-.1-....z=-__.7. • V..6...--'=-- • %.'--: =----lio,""e". -; , . , . ....„---,, Th._ ...:• - ,-..,- ........„ . .. . - -- ‘.., \ --..:•- •--.. - .! .... ••II, . 1, M1.7.1',$•----- 1 -ip,-,-,. .-,- . - ......1 ■ •........- ;'VI . , ,. o - .♦ j'� rte- •�-�-i.:79,„,..,_ ; ` CITY LIMITS .bs: w.---- ..,-.., :::=;:'. -.. .. . ..•!it -•-•.. • .-iddig--' *-- • at . f...*. .• . t . , ,. :Ili.— -, , • ilia: • .1• ,_.••j• j 2;s/ r'.% --Ike, I • , 1'1'• ,,,•.,.../.;44-. .:tr..4;4.. •- ipi,-----........•••;•,,,„„H.„1„w-iii".. , • _".-a-'4•;-'%*7.- - 1w5 • • • titoit - .74,% ?Or -. .- -;•- . \ .. r•,:.:• ....,..,-- . . .. ..... ...1W, , , _ -. :7-....l.r-. ."' (.t.e-:- i•■,.....3'- . • .. - \Note: Tko laalas s00• of Um ,. " .--- ` '• • ',., _`-: fi: o �1 Hoe marks Mir b*arsOs► • :• - . -= '''�- •∎,;14 .. ` ::. • ■ ' ' 7. i. AsS1‘...'.. '‘\ . - 'it; ' .***ik., V. '% . % ------ -.1ii., • --'' Moto: TAs smogs AIe%.Ills SI • . �. - •• �...,1 •srtt• tho south Asosdsry. \ •.. • '�� .. - £:\ • '• PA[/l/[ 0(141 \ 9 . r. - ,- . ,, :.:.., t -. _;:. ... -d r )(if , . 1 viklleiLz;zi2H1 \ ‘.• SCALE 1' • 800' 1 APPROX. AREA - 1100 ACRES 0 ,_ DATE 6-1/-64 PREPARED BY: Qie . CITY ENGINEER . r 1 INTRODUCTION This P report presents the results of our geotechnical work for the P proposed redevelopment project. The 1100-acre project area essentially P P coincides with the City of Rancho Palos Verdes' Moratorium Area as • No. 148U (see Figure 1, following page). The established by Ordnance many privately study area encompasses y P y owned lots and parcels within a the City, located generally landward of Abalone Cove ...- major portion of t y, 9 y and Portuguese Bend. A redevelopment plan has not been prepared to date. Purpose We understand that the goal of the project is to eliminate physical and economic blight in the redevelopment area through the stabilization of :A hazardous landslides. The purpose of our services, therefore, was to ar »4 compile available geologic and soil data pertaining to the project area, I indicate possible stabilization methods, including positive as well as negative impacts, and submit a written p r' ten re ort. It is our further understanding that this information will be used in preparation of an environmental impact. re P ort. For convenience, specific conditions, impacts,, and possible mitigation measures for major hazards and site P constraints are provided in the Appendix. A list of data reviewed follows the text of this report. Background Information During early the earl part of this century, large portions of the project area were used for agriculture, particularly within the flatter terrain. Farming is still conducted, but only in isolated areas. Urbanization in the Jro'ect area was relatively sparse until the late 1940's. Most of P the individual lots in this area are 1/2 acre or larger in size, with on-site residential sewage disposal . In general , the higher terrain remains undeveloped. The only tract developed within the project area since the early 1950's is the Seaview tract (Tract 22835) located at the southeast corner (see 131 Converse Consultants,Inc. IIIIIIINIIIIIMMMMINNNIIIIIIMIIIIIIIIIIMIIIIIIIIIIOIIIMIMMIIIIIIMOIIIIIIIIIIIIIIIIIIIIIIIIIIIMIIIIIIIIIIIIIIIIIIMIMIIIIIIIIIMIUIIIIIIIMIIIIIIIUIMIIIIIIIIIIIIIMIIIIIMIIIIIIMIMIIIIMIIIMIIIMIIIIIIIIIMMIIIMIIIIIIIMIIIIIIIIIIIIIIIIIIIIMIIIIIIMIIIIIIIIIMIE • , , . 1.-,7...i qi .- Ii2N:(.7L.:-. -211. 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Ors . - __ >/•:7-.-....; (1,, , ..„,,,. .. --......) 1,-- 77-7.-Itt:• • .11111011. 4. ) ,.,•..,, .."1tc - . - .--- - .,.'.. i- • ...- ; tf-s_43....„-;04-1.,..--;- -- ,r -a.----..,...•...,,„, ( , ,,---... . • - ___, . . . .. . . . 21 -0 ) ••• /---' 'clit R E A 392 L-71 \ * t •* '--• "6V;#1"-- -.,• .".' /..ftme, f' ,_..,,....„______... •• op,. - "' • i ■-...4: I, '• •• . m. • oet4 ,_;i ),e .. .1. e..4:..:::...-.....-wr:.,-z- -re--...„„...._...., :.-: .. "\C','. ,t....2)$) ,, 4,,,_ • ,c. -_/ ' .:. C ...'7. Tfil 11.1% • :..4.a. li. .)' - Wayfarers::4-6.-•--•a:dubla>.,■ . i• i lit' •-- .%(4 •-' . N\.t : -4"( .,./. ;• V.:::1• N-I: '1r -'. •..•/ - - •• l'%'•1 • ... 'It •s%c4,,- 'Chapel.----••• AFIcie,st• • - ,re‘/-<-*• •-.: *-a..r-7-. \ , ,4,1' -,,-.:'•i. !- :%fk'i. ,.-- i..4's .s.,_ 0„ •-•,,, . jos--:77. ', - le ...., ty,-- • .,.,!,;-:, • • • , - , I '..., e" el‘• ■ \ •• .'444442.. - I i..• I . 'i" • -"":N1[ ,. 4. ■1 • • 4, _ _ „/., t.„.,).- • „„(0 ... ‘-‘4 ../ ,e, eft, ....... •c.•-.. .. • • • _ , 1,■ . • `--,,,,,,.._. . I z........2 1 •?.....,_0• ., ..... - --------,r,... ; . ..,i •\. , !----.. ,,:i ..../c."N. i = ; I.;.:: •\ ) - • - Portugu 'to,' ' 4 1 vo i'..- 4-.- , ..,' :-. • s.• * -;;;=--_,* --- . r = Dens ‘? -------.. A../ -i ( ' , ,, -. -- J ."■_._ %-- -Th-. • .,... ,......, , • • \...%.9-• ,,. N -,$) oti •• *- . • . . • A • ..ii PAL- lird *aik,• .o s. ...:,.. ........j.,1 * Abalone Co %, % ' ' * (-- • __/ • •-it-ik .,7.-- .,-, , - ,) Cr'-;:\---• ,/p• \ . - os ;\• . .. , lo. . ..,. ,.. .'' 30 '-'""•.-- - ?l N .,..'_,- 11 V-Tr/.. ...... -------,7,-,01 , ,........„...,. ........• „v._ , •4' ..--",..., ...,.,....■..:. ed % •(b.\ .. \ ' \ .' ............... V , . 7; .., ...e.......,,,... ‘. , ‘\ ., 47Thi 4s\'''•::.*••■1 1 \(a\ . .7', ./f_. :** or \ •‘, ..4.'', -....12 • ,.. 4,, .. ....,::, L\ \\'41,40-4 . 'if .. i.: ,, ..÷v "),49 * tbortuaoss• "' LI 0- -- -le ._ . m .-v \ .,S........ . I C3.------------------ \ \ t O• .. i‘ gee .\.*-- ' 1:\ ..------ '.\ ,......._._.._._.. ----•N.N.......,InspiratIon ., \ , ,,,,\,:,,,,,v, ____....ci, ,i %\ 72 •. .` • .'\ ' %ft---:."...t-lz:,-..-:.:7 7 ) '-, • ,.. • '...... .■ a--i.its;-1'4'....:-J, - Reference: U.S.G.S. 7.5 Minute San Pedro (1964), Redondo Beach (1963), and Torrance (1964) Quadrangles (Photorevised 1981). :...„..:.i Scale: 1" = 2,000' .... . . . . LOCATION MAP - .• .. . . _,•.__ Project No RANCHO PALOS VERDES REDEVELOPMENT PROJECT AREA PALOS VERDES PENINSULA, CALIFORNIA 84-2224-01 ill - Figure No. © Converse Consultants Geotechnical Engineering ___ and Applied Sciences 1 —.... •• Figure 1, Location Map). This tract was reportedly graded in 1956 (Robert Stone & Associates, 1980c). Other tracts, contiguous to the project area, were graded during the 1970's and early 1980's. Tract 31617, located near the northwestern boundary, was graded between 1978 and 1979 (Evans Goffman & McCormick, 1979). Tract 32110, situated along the northern boundary, was partially graded in 1980 and 1981. Tract 38848, located between the latter tracts, was graded in 1981 (Converse Consultants, 1983). These referenced tracts were geotechnically investigated prior to development, except apparently the Seaview tract (Tract 22835) (Robert Stone & Associates, 1980c). Three significant landslides exist within the project area boundaries. These are large-scale prehistoric landslides which have reactivated during the recent past. They are referred to as the Portuguese Bend landslide, Abalone Cove landslide, and the Klondike Canyon landslide (see Figure 2, Geotechnical Hazard Map). The Portuguese Bend landslide, approximately 270 acres in size and one of the largest active slides in California, reactivated in 1956 (Yonder Linden and Lindvall , 1982). It was studied by various consultants in the 1950's and 1960's. This landslide, however, has continuously moved for the past 28 years. In 1956, about 156 residences were located within the active landslide (Vonder Linden and Lindvall , 1982). To date, most of these structures have been destroyed or abandoned. The Abalone Cove landslide, approximately 80 acres in size, reactivated in 1978; although some movement seaward of Palos Verdes Drive South reportedly occurred between 1974 and 1976 (County of Los Angeles, 1976; Larue, 1976; Robert Stone & Associates, 1979a). The Abalone Cove landslide was investigated by Robert Stone & Associates in 1978 and 1979. Dewatering wells were installed between 1980 and 1981 in an attempt to stop the movement. Reportedly, 26 residences are located within the reactivated Abalone Cove landslide. 1 • 132 Converse Consultants,Inc. The Klondike Canyon landslide, encompassing about 60 acres in size, reactivated in 1979 (Robert Stone & Associates, 1980c; Kerwin, 1982). Several consultants studied the upper part of this landslide, which affected the western part of the Seaview tract, from 1980 to 1982 (Robert Stone & Associates, 1980d, 1980e, 1982a; Moore & Taber, 1982; By 1982, ground movement related to this L�ndvall Richter, 1982). y 19 g landslide had essentially ceased based on visual observations of deformation within the Seaview tract. s� LANDFORMS AND TOPOGRAPHY The project area has been dramatically affected by both marine and nonmarine geomorphic processes. Formation of marine terrace platforms, continental erosion and accumulation, landsliding, and coastal erosion have shaped and reshaped the land. Pleistocene age wave-cut platforms (benches) formed around the peninsula at different levels as a result of glacial eustatic sea-level changes and uplift of the peninsula. For the 411/ most part, these surfaces and related deposits have been disrupted by large landslides. These ground movements have, in turn, affected drainage patterns within the project area. Major drainage courses include, from east to west, Klondike Canyon, Portuguese Canyon, Al tami ra Canyon, and Barkenti ne Canyon (see Figure 2). These drainage courses extend from the ocean up to elevations of 1100 feet and beyond (north of) the project boundary. Elevations within the project area range from sea level to about 1100- 1200 feet along the northern margin. Physi ographi c features include moderately steep hillsides, particularly in the upper part of the area above elevation 500 feet, steep landslide scarps, relatively flat ter- rain, and depressions associated with past and active landslides. In 5 general , "hummocky" terrain describes the geologically more recent landslides (i .e. , Portuguese Bend landslide). Some of the upper slopes are as steep as 1i:1 (horizontal to vertical ) , while the Canyon flanks Converse Consultants,inc. are locally steeper than 1:1 (45°). Steep cliffs to heights of 100 feet above sea level are present along the southern boundary, including the two promotories - Portuguese and Inspiration Points. The natural ground Ao surface in the project area has an overall slope angle of about 10 , or flatter than 6:1. Only very limited man-made slopes were created in this area, particularly during the last 30 years. GEOLOGIC SETTING The Palos Verdes Peninsula is characterized structurally as a doubly- , piUnging anticline trending northwest-southeast that has been uplifted on the southwest side of the Palos Verdes fault since Late Pliocene. During uplift of the peninsula and with changes in sea level , marine terrace (abrasion) platforms were eroded into the flanks 'of the hills. The marine Middle Miocene to Early Pliocene Altamira Shale member of the Monterey Formation constitutes the exposed bedrock over most of the peninsula (Ehlig, 1982a; Conrad and Ehlig, 1982). Surficial units that overlie the bedrock generally consist of marine sands and cobbles, and continental deposits of variable soil (sand, silt, and clay) composiP composi- tions. Geologic Units The dominant geologic units present in the project area are bedrock of the Altamira Shale, landslide deposits (debris), marine and nonmarine terrace deposits, and relatively thick accumulations of slopewash (see Figure 2). Alluvium, talus deposits, fill , and beach deposits also exist. Bedrock is exposed in the major drainage courses, as well as at isolated outcrops in the higher terrain and in landslide blocks them- selves. The Altamira Shale has recently been subdivided into the phosphatic (upper) cherty (middle) and tuffaceous (lower) lithofacies (Conrad and Ehlig, 1982). Accordingly, the project area is situated in the tuffaceous lithofacies of the formation. This subunit is charac- terized by interbedded tuff, s i l tstone, porcel ani to and chert, dol ostone, sandstone, shale, diatomite, and basalt (Conrad and Ehlig, 1982). 133 Converse Consultants,Inc. OF landslide deposits cover approximately 90% of the total project area or equivalent to about 1,000 acres of combined land. Terrace deposits occupy the southwest and southeast corners of the area, and overlie Portuguese and Inspiration Points. The remainder of former terrace deposits within the project boundaries have been either displaced from their original positions or eroded away because of l andsl i di ng. Terrace deposits are typically less than 30 feet thick, and they consist of moderately consolidated sand, sandy silt, and clayey silt with bedrock fragments. In general , slopewash deposits have accumulated over most of the land surfaces. These characteristically stiff clayey silt and silty clay soils are usually about 3-4 feet thick, except on the steep slopes. Geologic Structure The regional bedrock structure in this part of the Palos Verdes Penin- sula is generally homocl i na l (planar) with a gentle 5°-20° dip (downward tilt) to the southwest, or seaward. The beds, however, have also been 411/ affected by various geologic processes such as soft-sediment deforma- tion, basaltic intrusion, and probably Mio-Pliocene submarine (gravity) sliding, resulting in broad folds, tight folds, and small-scale contor- tions. Fold axes are typically oriented in an east-west direction. Bedding locally dips as steep as 70° within the eastern portion of the project area. Faulting and Seismicity No active or potentially active faults are known to be present on or project toward the subject site. The geologic structure of the southern California area is dominated by northwest-trending faults associated with the San Andreas system. Faults such as the Newport-Inglewood, the Whittier-Elsinore, the San Jacinto, and the San Andreas are the major faults of this system. They are all known to be seismically active, and the San Andreas and San Jacinto faults are known to have ruptured the 40 ground in historic time. Converse Consultants,Inc. The principal faults considered most likely to rupture and possibly cause strong ground shaking to this area during the useful life of the proposed redevelopment are listed in Table I, which includes a summary of important seismic characteristics estimated for each fault based on available data. TABLE I ESTIMATED SEISMIC CHARACTERISTICS OF PRINCIPAL FAULTS Minimum Total Maximum Distance Fault Credible Age of To Site Length Earthquake Most Recent Fault Name (Miles) (Miles) Magnitude Displacement Palos Verdes 3 50 7.0 Late Quaternary Newport-Inglewood 11 50 7.0 Historic (1933) Malibu-Santa Monica 20 40 7.5 Late Quaternary Norwalk 20 7 6.5 Late Quaternary Raymond 26 12 6.5 Late Quaternary Whittier 26 32 6.5 late Quaternary or Holocene Sierra Madre 33 60 7.0 Late. Quaternary (San Fernando) or Holocene (1971) San Andreas (Central ) 53 220 8+ Historic (1857) San Jacinto 57 130 7.5 Late Quaternary The maximum credible earthquake magnitudes given above for the known faults are believed to be relatively good approximations, based on direct geologic evidence. Based on our study, the Newport-Inglewood and Palos Verdes faults appear most capable of generating the most severe ground shaking at the project area. These faults could produce maximum credible ground accelerations on the order of 0.3g to 0.6g (Seed and Idriss, 1982). 134 Converse Consultants,Inc. GROUND WATER Ground water is known to exist at relatively shallow depths throughout the lower, or seaward, half of the project area. Some ground-water data to � P was obtained in the Abalone Cove and surrounding areas during the late 1960's, primarily by Moo r e & Taber. Considerably more information was gathered by Robert Stone & Associates in this area, following reactiva- tion of the Abalone Cove landslide. Somewhat unreliable and limited data exists relative to ground-water levels within the Portuguese Bend landslide area based on exploration co nducted b y several investi a�e r s in the late 1950's and 1960's. No subsurface exploration nor ground- water monitoring have taken place in the latter area since that time. Ground-water information was acquired in the Klondike Canyon landslide area and near the eastern edge of the Portuguese Bend landslide by Moore & Taber as recently as 1981. Based on available data, free ground water was between 40 and 120 feet 411/ below the ground surface of the Portuguese Bend landslide i n the late 1960's. Depth to ground water was, and is apparently now, quite variable owing to the irregular shape of the landslide terrain. Three closed depressions within the slide mass, including "lake Ishibashi" and the graben near the main head scarp, have had permanent levels of ponded water. These levels, for the most part, probably reflect actual phreatic surfaces; and, such levels would be compatible with the previous data. As indicated by Yonder Linden and Li ndval l (1982) , the water table has risen some 30-60 feet in the northern part of the Portuguese Bend landslide since reactivation in 1956. This higher level would also be consistent with the aforementioned conditions. Based on the apparent ground-water table elevations, such a surface would vary from 20 to 100 feet above the basal slide plane. The study performed by Robert Stone & Associations (1979a) revealed ground water was about 40 feet, on the average, above the base of the Abalone Cove landslide (Ehlig, 1982). Depth to the water table varied Converse Consultants,Inc. between about 50 and 100 feet below the ground surface north, or land- ward, of Palos Verdes Drive South. Localized seepage is evident along the base of the bluff in Abalone Cove. Several methods for dewatering the slide mass by lowering lowerin the water table were considered by Robert 171 Stone & Associates (1979a; Ehlig and Bean, 1982). Installation of vertical wells was ultimately recommended. By 1981, a system of 7 dewatering wells and 6 monitoring wells was in full operation. By s August 1981, ground-water levels i n the vicinity of the production wells had been lowered from 15 to 35 feet below the pre-dewatering levels of 1980 (Robert Stone & Associates, 1981d). As of January 1982, a total of about 70 million gallons of water had been removed, at an average rate of approximately 100,000 gallons per day (Ehlig and Bean, 1982). All ground water pumped to the surface is piped to the ocean. Water quality is apparently quite poor (Ehlig, personal communication). I 110 During subsurface exploration conducted by Moore & Taber (1981; Kerwin, 1982) near the beach immediately east of the toe of the Portuguese Bend landslide, an artesian ground-water condition was encountered. Ground water was first noted at a depth of approximately 66 feet, or at about elevation -54 feet. Initially, the water flow rate was recorded at 150 gallons per minute. A dewatering well was, therefore, installed at that location. By February 1982, the flow rate decreased to a relatively constant 19 gallons per minute (Kerwin, 1982). This water is routed to the ocean. Chemical analyses of water sampled revealed relatively high sulfate, bicarbonate, magnesium, and iron contents. LANDSLIDES As previously indicated, most of the project area has been affected to some extent by landsliding. We have classified these landslides into two basic groups - active or marginally stable landslides, and poten- tially active (prehistoric) landslides (see Figure 2, Geotechnical Hazard Map). In general , active landslides have Factors of Safety slightly less than 1.0 (driving force equal to resisting force). 135 Converse Consultants,Inc. Potentially active landslides typically have calculated Factors of Safet y between 1.0 and 1.5, where 1.5 is the currently acceptable (minimum) Factor of Safety to allow for development; although such analyses are usually somewhat subjective. The landslides i n the project area have been collectively referred to as the Portuguese Bend landslide complex, characterized by low-strength tuffaceous and bentonitic terrane. The larger landslides, including the Portuguese Bend and Abalone Cove landslides, are low-angle, transia- ti onal (block glide) failures. Each of these slides consists of indivi- dual subblocks. The Abalone Cove landslide basal slide plane at an average depth of about 120 feet, has a reported 4°-7° seaward inclina- tion (Ehlig, 1982). The prehistoric landslides situated in the higher terrain landward of the Abalone Cove landslide reportedly have maximum thicknesses of 250 feet, with seaward inclinations less than 20° (Lass and Eagen, 1982). The Portuguese Bend landslide has an undulating slip surface at depths ranging between 100 and 220 feet within the main slide mass based on available data. To date, no surface expression of the Klondike Canyon landslide has been detected seaward of Palos Verdes Drive South. Exploration restricted to the main head-scarp area of this landslide encountered slide surfaces ranging from depths of 40 to 50 feet (Robert Stone & Associates, 1982a). The slide plane, or zone of deformation, near the toe may be in excess of 100 feet deep and consid- erably below sea level . The actual slide plane configuration seaward of Palos Verdes Drive South has yet to be determined, but the general concensus of opinion is that the slide surface, or zone of deformation, does extend to the beach area. Movement of the large, active landslides has been slow, but relatively constant, during the reactivation period. Maximum horizontal displace- ment within the Portuguese Bend landslide has varied from about 430 feet to as much as 550 feet from 1956 to 1983 (Ehlig, personal communication). Rate of movement approached 1/2 inch per day during the first 20 years, Converse Consultants,Inc. while it was on the order of one inch per day during the last several years. For comparison, after the Abalone Cove landslide propagated inland of Palos Verdes Drive South, total horizontal movement was measured at about 15 and 20 feet (maximum) at two Los Angeles County ..: survey stations from October 1978 to August 1980 (Ehlig, 1982). These distances are equivalent to average displacement rates of 1/4 inch to 1/3 inch per day. By 1981, movement had essentially stopped over most of the land surface of the Abalone Cove landslide (Ehlig, 1982). Apparently, recurrent movement has occurred following periods of intense rainfall. Horizontal displacement of the reactivated Klondike Canyon 1"andslide has been quite small; and, total movement during the past, based on the exploration, has been relatively small as well . Based on the data reviewed and the opinions of most consultants who have worked in the project area, it has become evident that several principal factors have contributed to reactivation and continued movement of these active landslides, which are: o High ground-water levels • Adverse (bedrock) bedding o Coastal erosion M Bedrock structure and bedding conditions are nonvariable through time. Coastal erosion has probably been relatively constant, except during sporadic periods of severe storms (I.e. , January - March 1983). Land- slide material displaced into the intertidal and run-up zones is con- stantly subjected to wave attack and erosion. It appears, therefore, that ground water plays a major role in ground movement, and such has been variable through time. It has been postulated (Robert Stone & Associates, 1982a) that movement of Klondike Canyon landslide has been related to the activity of the Portuguese Bend landslide, and to in- creased moisture content. Sources of ground water which have been 136 Converse Consultants,Inc. d n ified as contributing to the ground-water regime in these active yet 9 9 landslide areas include: o Rainfall o Runoff from upsl ope areas o Subsurface inflow from upslope areas 4 o Domestic use (irrigation and waste water) o Drainage deficiencies (man-made and natural ) MAJOR GEOTECHNICAL CONSIDERATIONS Stability As indicated, several factors contribute to instability in the project area and, more importantly, to continued movement of the hazardous active landslides. It is our opinion, among others, that landslide stabilization in the project area is geotechni cal ly feasible. It is doubtful , however, that any single remedial technique would be adequate or cost-effective, especially because of subsurface interrelationships and effects that off-site conditions have on individual landslides and associated properties. To date, no all-encompassing stabilization plan has ever been seriously considered. Whether or not the Factors of Safety can be increased significantly to 1.5 for the entire area has yet to be determined. Limited feasibility studies are currently in progress for Portuguese Bend landslide stabilization and further Abalone Cove landslide stabi l i zati on. Such stabilization plans should include provisions for, but not be limited to: ° Surface drainage • Design • Temporary • Permanent Converse Consultants,Inc. o Subsurface drainage . Tests/models Temporary Permanent o Earthwork . Minor • Massive o Shore Protection • Interim • Ultimate Surface Drainage Improvement of surface drainage throughout the project area would probably substantially reduce the amount of rainfall and runoff that infiltrates the subsurface. Surface water may ultimately reach the ground-water table or localized perched zones by way of: 1) primary scarps and fissures, 2) secondary tension cracks, 3) permeable strata and joints, 4) major drainage courses, and 5) depressions and graben areas. Most of these features are restricted to the project area landward of Palos Verdes Drive South. _ Aside from minor street resurfacing in the Abalone Cove area, remedial work along Palos Verdes Drive south, removal of obstructions in Klondike Canyon, and installation of a large-diameter CMP in Altamira Canyon between Narci ssa Drive and Palos Verdes Drive South, most disturbed 1 ground and natural areas within the project area remain unimproved. Additional improvements to existing and future developed areas could consist of: 0 Installation of large-diameter RCP, CMP or concrete lining in critical portions of major canyons, especially Altamira Canyon and Portuguese Canyon (see Figure 2); 0 Installation of curbs, gutters, and storm drains along paved streets; 137 Converse Consultants,Inc. o Sealing all cracks and filling low-lying areas to create positive runoff; and o Construction of other appropriate drainage devices on sloping terrain. In lieu of filling large depressions (i.e. , Lake Ishibashi) , these areas could be lined with impervious materials, and water levels maintained by drainage devices. ^- Subsurface Drainage Based on the Abalone Cove landslide dewatering program and statistical data gathered regarding ground movement and water levels i t is evident i that the height of ground water within the active landslides is the principal factor controlling stability of these slides. This appears to be applicable only in the southern two-thirds of the project area. Where ground water lies at or above the slide plane, it tends to have multiple affects on the slide mass and to decrease stability. The cause and resultant affects are: 1) subsurface inflow with increased pore-water (hydrostatic) pressure applied to the slide mass in the downslope direction, 2) subsurface inflow or static water level contri- buting to buoyancy, or uplift pressure beneath the slide mass, and 3) vertical percolation into fissures at depth with increased hydrostatic pressure build-up within the slide mass itself. To minimize these adverse affects, lowering of the water table in the landslides i s essential. This can be accomplished by either passive or active dewatering systems. Among the more conventional systems are wells and pumps (active), and near-horizontal drains (passive). A rather specialized technique, typically used only on large dewatering Converse Consultants,Inc. projects, is a (passive) system of separate or interconnected water tunnels. One system, or a combination of different systems, could prove to be most effective, depending on location and specific conditions present. LJ In general , u sl o e areas will also benefit from such dewatering. Stability should be increased in the vicinity of those areas by lowered water levels. The potential for landslide reactivation in areas above active landslides should be decreased as a result of dewatering and downslope stabilization. Earthwork There is probably no simple procedure, in our opinion, to-stabilize the project area solely by earthwork, or even in combination with other remedial work (i .e. , dewatering, correcting surface drainage, etc. ) The most cost-effective type of earthwork may vary from minor regrading to massive earth/reinforced structures, and from location to location within the entire project area. Conventional landslide stabilization traditionally involves cutting and filling by unloading the head (reduc- ing the driving force) , loading the toe (increasing the resisting force) , and construction of buttress and shear key fills (decreasing the driving force) by interrupting the slide surface and adding higher- strength material. Considering the general geologic conditions in the project area, and extrapolating data provided by Moore & Taber (Lass and Eagen, 1982), such massive earthwork could exceed a total volume of 30 million cubic yards of material. During this type of remedial construe- ;, ti on, temporary ground support is often needed for the deep excavations. It should be realized that in some instances, due to grade changes, stabilization in one area may adversely affect existing stability in another area. 411/ 138 Converse Consultants,Inc. IIIL As indicated by Robert Stone & Associates (1980a) , the addition of material (fill ) anywhere onto the Abalone Cove landslide, except at the toe, would tend to increase the driving force owing to the generally planar anar slide surface. In contrast, adding and/or redistributing material within the Portuguese Bend landslide could have positive effects on portions of this slide and the entire mass as well Besides the afore- mentioned conditions, consideration should be given to the following in the design and implementation of both temporary and permanent ground support: F- °° Land redistribution (permanent). o Buttress/shear key construction, with lime or cement treatment as needed (permanent) ° Reinforced earth structures (permanent) ° Conventional retaining walls, with tiebacks as needed (permanent) o Crib walls (permanent) o Chemical grouting (temporary, permanent) As a result of possible remedial earthwork, in conjunction with one or more of the above, graded slopes may be created. To reduce the potential for erosion and surficial instability, slope angles and slope heights should be minimized where possible. Factors which can influence sur- ficial stability include soil type, slope angle, slope orientation, potential for loss of cohesion, and landscape watering. Flow over graded slopes should be avoided. Slopes should be planted and main- tained to retard erosion and reduce the potential for surficial distress during periods of heavy or prolonged rainfall . Rodent activity should be prevented because such activity loosens the surficial soils and provides avenues for water infiltration during heavy rains. In addition, landscape watering should be kept to the minimum which sustains plant growth. A knowledgeable landscape architect should be consulted to provide additional input regarding vegetation types and needs. Converse Consultants,Inc. Shore Protection As indicated previously, removal of landslide debris along the shoreline contributes to continued instability. Several agents which combine to --_ cause coastal erosion are waves, storm surge, tides, wind, and near- ' rrents. The adverse affects may shore currents. be reduced or eliminated by appropriate shore protection. Although some (interim) protection could be P rov i ded during the initial stage of redevelopment, it may be neces- sary_ to stop landslide movement completely before any final (ultimate) structures are constructed. Shoreline structures which may be feasible, and should be considered, include: o Stone revetments o Sea walls o Breakwaters o Groins ° Man-made reefs, or o A combination thereof Expansive Soils. The bedrock materials that have potential for expansion are the silt- stone, shale and bentonitic tuff units. Topsoil rich in bentonitic clays are undoubtedly expansive. Soils derived from both bedrock or surf i ci al deposits may be regarded as being moderately to highly expan- sive. Soil expansi ti vi ty should be confirmed by laboratory testing and analysis to determine their suitability as foundation materials. Settlement Potential The potential for settlement is expected to be minimal in fill areas within the project area, provided the vertical thickness of compacted Ill/ fills does not exceed about 50 feet. In any case, such fill settlement 139 Converse Consultants,Inc. 1110 ' is not unusual and should not adversely affect the proposed redevelop- ::; Trent. There is the potential for some settlement of terrace deposits, s l opewash, and slide debris, as a result of dewatering, where the water ``` table is substantially lowered. Areas that may be affected by such dewatering are expected to be relatively localized. Settlement would probably occur during construction and lowering of the water table. The :1 potential for settlement of the existing deposits should be evaluated during subsequent studies. Alternatively, fill surcharge or deeper foundation systems could be used in areas with high settlement pptential . Secondary Seismic Effects The secondary effects of seismic activity normally considered as possible hazards to a site include several types of ground failure and induced flooding. The various types of ground failures, which might occur as a Am consequence of severe ground shaking, include l andsl i di ng, subsidence, ground lurching, shallow ground rupture, and liquefaction. Because of the predominance of bedrock and consolidated terrace deposits present in the project area, although most material has been displaced by landslid- ing, and the distance to the nearest active fault, potential for severe ground shaking, subsidence, ground lurching and shallow ground rupture is considered very low as a result of seismic activity. Existing potentially active (prehistoric) landslides could possibly reactivate as a result of strong ground shaking, particularly if the Factor of Safety is substantially less than 1.5 (static). Based on the general subsurface conditions, including the presence of ground water at about 50 feet, or lower, below the ground surface, the potential for liquefaction i s considered low. Liquefaction may occur in localized areas, depending on soil type, grain size, relative density, ground-water level , degree of saturation, and both intensity and duration of ground shaking. Converse Consultants,Inc. • Seismically induced flooding that might be considered as a potential hazard to a site normally includes flooding due to a tsunamis (seismic sea wave), a seiche, or failure of a major reservoir retention structure upstream of the site. Since the project area is located adjacent to the Pacific Ocean, the potential exists for seismically induced flooding due to a tsunamis run-up. LIMITATION This report has been prepared for the exclusive use of Urban Futures, Inc. with specific application to the preparation of an EIR for the City 'of Rancho Palos Verdes. The findings of this report are based on the results of our data review, and interpretation and evaluation of known conditions. In our opinion, this geotechnical evaluation is adequate for your environmental analysis. Professional services in connection with this geotechnical report have S complied with generally accepted practice in the fields of soil mech- anics, foundation engineering, and engineering geology. We make no other warranty, either express or implied. Respectfully submitted, CONVERSE CONSULTANTS, INC. Mark E. Bryant, C.E.G. 1046 Senior Geologist MEB/OLN:bI • 0 Converse Consultants,inc.Ine n DATA REVIEWED Bryant, Mark E. , 1982, Geomorphology, Neotectonics, and Ages of Marine 9 Terraces, Palos Verdes Peninsula: Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook and Volume, p. 15-25. Conrad, Cathy L. , and Ehlig, Perr L. , 1982, The Monterey� erey Formation of the Palos Verdes Peninsula, California - An example of Sedimenta- tion in a Tectonically Active Basin Within the California Continental Borderland: Converse, Davis and Associates, September 26, 1968 through August 26 96 DH-1 9 9 1 9, Core Hole Logs DH 1 through D-14 (Project No. 67-257-AH . Converse Davis Dixon Assocites, February 17, 1978, a- Geolo is Investi "tion Phase 9 9 ase I I, Goode & Goode Parcel 10, Rancho Palos Verdes, 4. California (Project No. 77-2210-05/8). Converse Ward Davis Dixon, February 14, 1980, Geotechnical Investigation (Phase A), Goode & Goode Parcel 10, Rancho Palos Verdes, California (Project No. 79-2316-01). Converse Ward Davis Dixon, April 2, 1981a, Supplemental Geologic Investi- gation,ation, Portion of Parcel 4, Rancho Palos- Verdes, California (Project No. 81-02111-01). Converse Ward Davis Dixon, April 10, 1981b, Geotechnical chnical Investigation, Tentative Tract 38848, Island View, Rancho Palos Verdes, California No. 81-02120- O1). Converse Ward Davis Dixon, September 8, 1981c, Geotechnical Investiga- tion, Parcel 12, Tentative Tract 37885, Rancho Palos Verdes,(Project N s' No. 81-02167-01). Converse Consultants, November 16, 1981d, Geotechnical Investigation, Parcel 4, Tentative Tract 37962, Rancho Palos Verdes, California No. 81-02200-01). Converse Consultants, January 31, 1983, Final Geotechnical Report on Tract Grading, Tract 38848, Crenshaw Boulevard at Crest Road, Rancho Palos Verdes, California (Project No. 81-2120-02). 0 02). County of Los Angeles, Department of the County ounty Engineer. March 29, 1973, Geologic Evaluation of the Proposed Abalone one Cove P Park. County of Los Angeles, Department rtment of P County Engineer,_.March 17, 1976, Geologic Report for Sanitation District Pump Station - P o Palos Verdes Drive South and Sea Cove, Palos Verdes, California. County of Los Angeles, Flood Control District, January 24, 1978, Al tami ra Canyon Drainage Study. DATA REVIEWED (Continued) Easton, W.H. , 1973, Earthquakes, Rain, and Tides at Portuguese Bend Landslide, California: Bull. Assoc. Engineering Geologists, v. 10, p. 173-194. Ehl i g, Perry L. , 1982a, Mechanics of the Abalone Cove Landslide Including The Role of Ground Water in Landslide Stability and a Model for Development of Large n g Landslides ides i n the Palos Verdes Hill: Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook and Volume, p. 57-66. Ehlig, Perry L. . 1982b, The Palos Verdes Peninsula: Its Physiography, r land Use and Geologic Setting: Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook and Volume, p. 3-6. Eh l i g, Kathleen A., and Bean, Robert T., 1982, Dewateri n 9 of the Abalone Cove Landslide, City of Rancho Palos Verdes, Los Angeles County, y California: Landsl Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook and Volume, p. 67-79. Emery, K.O. , and Juhn, G.G. , 1982, Sea Cliffs: Their Processes, Pro- files, and Classifications: Geological Society of America Bull. , v. 93, p. 644-654. ' Evans, Goffman 8 McCormick, May 23, 1973, Report of Geotechnical Inves- tigation, Fi l i orum Property at Crest Road Opposite Hi hri d e Road Palos Verdes, 9 g Road, e es, County of Los Angeles (Job No. 73-56). Evans, Goffman b McCormick, August 2, 1979, Final Report, Inspection p and Testing of Rough Grading - Tract 31617, Rancho Palos Verdes for Presley of Southern California (Job No. 78-21). Jahns, R.N., and Yonder Linden, K., 1972, Space-time relationships of Landslidin on P g o the Southerly Side of the Palos Verdes Hills, s, a California: Assoc. of Engr. Geol. Special Publication, P. 123-138. Kerwin, Scott, T. , 1982, Land Stability in the Klondike Canyon Area: Landslides i d y s es and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook p. 39-48. and Volume, P Komar, Paul D. , (editor), 1983, CRC Handbook of o Coastal Processes and Erosion: CRC Press, Inc., Boca Raton, Florida. Larue, D.K., 1976, The Sedimentary Response to Landsl idi n i n the Marine Nearshore, Portuguese e o tuguese Bend landslide Complex, California:Cl i f North- western Univ. , unpub. M.S. thesis. 141 DATA REVIEWED (Continued) Lass, Gary L. , and Ea en Jack T Eagen, T. , 1982, Introduction to the Ancient Abalone Cove Landslides: Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. So c.c. Amer. Field Trip ho. 10 Guidebook and Volume, p. 81-87. Leighton & Associates, March 13, 1979, Geotechnical Review of Final Report Draft of the Abalone Cove Landslide Investigation . No. 178481-01). . t�gation 4:��: 1.. Leroy Crandall and Associates, Februar 28, 1983, H Y � ydrol geol ogy cal Review, Abalone Cove Landslide, Palos Verdes Peninsula,e insula, Los Angeles f County, California (Job No. E-81319). Jindvall , Richter & Associates March • • ch 1982, Geological Investigation of Great Lakes Properties' Parcel 9 P 11, Rancho Palos Verdes, California. Li ndval l , Richter & Associates July 1983, Geology of Parcel 4, Great Lakes Properties, Rancho Palos Verdes, California. Li naval 1 , Richter & Associates, Februar 1984 Y 6eo 1 ogy of Parcel 10, Great Lakes Properties, California. Merriam, R. , 1960, Portuguese Bend Landslide, Palos Verdes Hills, California: Jour. Geology, v. 68, P. 140-153. Moore & Taber, February 28, 1968 through June • . 9 17, 1969, Test Boring Logs for Borings 1-60, 101-103, 107-109, and Test - Pit Logs for Pits 1-59 (Job Nos. 18-507 GP & 18-741). Moore & Taber, February 17, 1969, Sections A-A' and 8-6' (Phase II), (Plate Sections F-F' and G-G' ' - ' (Job IV), Sections C- C and D-D (Plate III} for Fi l i orum Property No. August 6, 196 s Map 9 1969, Location of Bori n 9 p for Filiorum i orum and Vista Sudeste Properties, Palos Verdes, California (Job No s. 18-507 & 18-741). Moore & Taber, November 30, 1981, Addendum Report of Geotechnical Inves- tigation, Easterly Portion of Parcel 15, Portuguese� o tuguese bend Club, Rancho Palos Verdes, California (Job No. 380-462). Nelson, Kaleb L., October 11 1976, Environmental Impact Report of Tract t 31617 in Rancho Palos Verdes for Presley of Southern California. Nordin, John G. , 1965, The Portuguese Bend d Landsl ide, Palos Verdes Hills, Los Angeles County, California: Landslides and Subsidence Geologic Hazards Conference, State of California Resources Agency, p. 56-62. y Planning Consultant Research, November 1980, Final Environmental Report No. 19 Prepared Impact pared for the City of Rancho Palos Verdes 38848). (Tract • r DATA REVIEWED (Continued) Rancho Palos Verdes, Cit y of, November 25, 1975 (revised through 8/83) Development Code - Zoning and Subdivision Ordinance. Ray, Monte E. , 1982, Geologic Investigation, Grading Stabilization Measures, and Development of the South Shores Landslide: Landslides and Landslide Abatement, Palos Verdes Peninsula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - Guidebook and Volume, p. 29-38. Robert Stone & Associates, February 28, 1979a, Final Report, Geotech- ni cal Investi gati on of Abalone Cove Landslide, Rancho Palos Verdes, los Angeles County, California (Job No. 1372-00). Robert Stone & Associates, March 23, 1979b, Moratorium Status - An Addendum to our Final Report on the Abalone Cove Landslide (Job No. 1372-00). Robert Stone & Associates, August 16, 1979c, Dewateri ng Test Results and Related Analyses, Abalone Cove Landslide, Rancho Palos Verdes, California (Job No. 1372-98). Robert Stone & Associates, March 27, 1980a, Geologic Survey Regarding Remedial Grading Within landslide Moratorium Area, Rancho Palos Verdes, California (Job No. 1545-77). Robert Stone & Associates, May 8, 1980b, Second Progress Report, Abalone Cove Landslide Dewatering Project (Job No. 1546-00). Robert Stone & Associates, August 13, 1980c, Geologic Review of Data Pertaining to Ground Movements in the Seaview Area, City of Rancho Pal so Verdes (Job No. 1461-00H). Robert Stone & Associates, September 15, 1980d, Investigation of Surface Deformation, Seaview Area, City of Rancho Palos Verdes (Job No. 1645-00). Robert Stone & Associates, December 10, 1980e, Addendum to our Report on Surface Deformation, Seaview Area, City of Rancho Palos Verdes (Job No. 1645-01). Robert Stone & Associates, January 20, 1981a. Geologic Report, Suggested Additional Remedial Measures, Abalone Cove Landslide, City of Rancho Palos Verdes (Job No. 1546-00) Robert Stone & Associates, January 20, 1981b, Geologic Report, Status of Landslide Movement, Abalone Cove Landslide, City of Rancho Palos Verdes (Job No. 1461-00H). -- ..�..-, _ 142 DATA REVIEWED (Continued) Robert Stone & Associates, March 23, 1981c, Review of Geologic Investi- gation for Tentative Tract No. 37885, Goode & Goode Parcel 12, Upper Forrestal Drive (Job No. 1750-00). Robert Stone & Associates, August 11, 1981d, Status Report on Abalone Cove Landslide and Recommendations for Further Remedial Actions (Job No. 1795-00). Robert Stone & Associates, January 21, 1982a, Results of Subsurface Geo- logic Investigation - Recommendations Concerning Klondike Canyon Landslide and Moratorium Boundary, Seaview Area, City of Rancho Palos Verdes, California (Job No. 1843-00). Robert Stone & Associates, April 7, 1982b, Status Report on Abalone Cove Landslide and Recommendations for Further Remedial Actions (Job No. 1795-00). Seed, H.B. , and Idri s s, I.M., 1982, Ground Motions and Soil Liquefaction During Earthquakes: Earthquake Engineering Research tnsti tute, 127 P. Sunamura, T. , 1982, A Predictive Model for Wave-Induced Erosion, With P Geology, v. 90, Application to Pacific Coasts of Japan: Journal of Ge to , No. 2, p. 167-178. Todd, David Keith, Consulting Engineers, November 1981, Role of Ground- water in the Abalone Cove Landl si de, A Progress Report. Todd, David Keith, Consulting Engineers, November 1983, Effect of Urbanization on Groundwater in Al tami ra Canyon Watershed, A Progress Report. Yonder Linden, K. , 1972, An Analysis of the Portuguese Bend Landslide, Palos Verdes Hills, California: Unpublished Ph.D. Dissertation, Stanford University, 260 p. Yonder Linden, Karl and Li ndval l , C. Eric, 1982, The Portuguese o tuguese bend Landslide: Landslides and Landslide Abatement, Palos Verdes Penin- sula, Southern California, Geol. Soc. Amer. Field Trip No. 10 - P -Guidebook and Volume, p. 49-56. Woodring, W.P. , Bramlette, M.N., and Kew, W.S.W. 1946, G eo l ogy and Paleontology of the Palos Verdes Hills, California: U.S. Geol . Survey Prof. Paper 207, 145 p. . Various geologic maps, dated 1965-1974, Abalone o e Cove and Portuguese Bend Areas by Moore b Taber, Leigton & Associates, and Peter Gardett. • Ill/ `�.---mac 0 _ From: • 1._. _ h;�,. -i„- ---...-b.-,-•r. _ - f ice of the Governor �,r ;:. •- . f fllatn�► .;end Resear _S /` 4-J.”' ' ' -1- Of f lc etr ..t'.ey , r f- Of St ' i Cyr ) F. , .0th Street, Room 12 c . -' 1::: �i400 10 ento CA 95814 < < v F .. Sacramento, - t v ,-- e - ---_ i t k. . ) To: GARY PIVO RANCHO PALLS VE D S REDEVELOPMENT AGENCY 30940 HAW'11ORNE BLVD RANCHO PALS VEtDES CA 90274 3 : •• • -•• • •....... .. ... Yom.. --1.... ........_.fiw .✓-_• ---..a '.��1+.��■I1:+i•1i+rl0- -rr•1WL-d r• • • 1_ g -._ _ 7f.- C lit. C N ACIODILEDGEMENT t - - / - ..c. ''' State of California Project Notification and Review System State Clearinghouse (916) 445-0613 RANCHO PMENr STATE QSARI NGHOUSE KUNBER; 84081511 f-• :. . - ' START'S: 10/05/84 \ , CONTACT: CHRIS G OGGIN (REvIiq gpj'T'S CN NEXT DAY WHEN • R� DOCUMENT IS I� 10:00 A.M.) Please use the State Clearinghouse Number on future 0 . office and with agencies approving correspondence with this ag approvi or reviewing your project. This card does not verify conpl i ance with env i rornen t al review A letter containing the State, comments or a letter conirming o Scat cunnen tea will be forwarded to you after the tevi ew is lete no State 143 Bev. 8/83 14 .0 COMMENTS AND RESPONSES TO COMMENTS The formal review period for the Draft Environmental Impact Report for the Rancho Palos Verdes Redevelopment Project (SCH #84081511) was established by the State Office of Planning and Research as October 5, 1984 to November 5, 1984 . The following is as list of agencies, organizations and individuals who have provided written responses to the DEIR: 1. County Sanitation Districts of Los Angeles County 1955 Workman Mill Road Whittier , California 90607 By - Marvin Holms, Project Engineer, Planning Section 2. • University of California, L.A. , The Institute of Archaeology, Los Angeles, California 90024 By - Susan Colby, Survey Archaeologist and Marty Rosen, formerly of the University of California, L.A. 3. Palos Verdes Peninsula Unified School District 3801 Via La Selva Palos Verdes Estates 90274 By - Jack Price, Superintendent 4 . City of Rolling Hills Estates 4045 Palos Verdes Drive North Rolling Hills Estates, California 90274 By - Bruce A. Lenorovitz, Planning Director 5 . Office of Planning and Research 1400 Tenth Street Sacramento, CA. 95814 By - John B. Ohanian, Chief Deputy Director 6. Dept of Food and Agriculture Sacramento, CA. 95814 By - Harry J. Krade, Assistant Director, Special Assignments 7. Resources Agency, State of California, Sacramento, CA 95814 By - Jack C. Parnell, Director 144 The following is provided as a response to the written comments received during the formal review period. Aftl 1. County Sanitation Districts of Los Angeles County The County Sanitation Districts, in reviewing portions of the Rancho Palos Verdes General Plan and Draft EIR for the Proposed Redevelopment Project, indicated that there are sections of the DEIR which are not correct. The Sanitation Districts, also, state that previous material provided were not included in the DEIR. Refer to Section 4 .11.2 of the DEIR and the Districts ' letter 71 of October 16, 1984. Given the current unstable physical environment of the Project Area, the Districts are providing sewer service in the best possible manner ; however , the present "system" is in need of upgrading to meet more normal conditions. This opportunity may occur if stabilization A- of the landslide is accomplished. While "the Districts have the ability to divert flows in the event of a break in one of the lines, " spills do occur. Mr . Roger A. Beeken's letter , dated September 5, 1984, and attached to Mr . Holmes' letter , was in response to a review of a section of the City's General Plan, not DEIR, but does address deficiencies in sewerage facilities. These deficiencies include "costly" maintenance "under extremely difficult and unpredictable conditions . " It is unfortunate that the September 5, 1984 letter was All' mop not included in the DEIR due to a failure in the sharing of information among the entities involved in the environmental, General Plan and Report to Council process. We hope that the information of the Districts, as included in this Final EIR, will provide an opportunity for their views to be exposed for consideration prior to formal action on the EIR. It is our understanding that sewage spills have occurred .1 (City staff comments) . We have noted that the line-system needs to be upgraded and placed underground when stabilization of the slide is achieved. Another viewpoint has been expressed and should be considered. 2. University of California, Los Angeles, The Institute of Archaeology Both Ms. Susan Colby and Mr . Marty Rosen (Refer to letters of October 15 and 17, 1984 ) have expressed a need to determine, as early as possible, if the Project Area has archaeological resources of unique value. The EIR supports this viewpoint and mitigation is provided (Section 4 .7) to prevent destruction of significant cultural-historic resources . 145 3. Palos Verdes Peninsula Unified School District !II The concerns of the District are primarily financial and specifically regard not being adversely affected in its ability to provide student "housing" (facilities) . Section 4 .11 .11 of the EIR reviews school facilities . The present redevelopment process includes local consideration of a Project prior to 1985. The State of California has adopted provisions which determine the financial position of School Districts when impacted by redevelopment . This process may include the establishment of a Fiscal Review Committee to consider financial impacts of specific redevelopment projects (CCRL 33353 ) . Negotiations between Rancho Palos Verdes Redevelopment Agency and all affected taxing agencies have taken place. Any agreements from these negotiations will determine .tax increment allocations during the project years of any adopted redevelopment plan. The required Report to Council from the Rancho Palos Verdes Redevelopment Agency will provide the framework for consideration of use of projected tax increment funds . It should be noted, however , that the EIR does not anticipate the redevelopment project to significantly affect, in a negative manner , school facilities serving students from the Project Area. Current capacity figures for schools which may serve the Project Area were not available (November 6, 1984 ) . Student impacts , given present facilities of the District, should not cause a negative situation. 4 . City of Rolling Hills Estates The concerns expressed in the letter from the City of Rolling Hills Estates are (1 ) traffic outside the Project Area, (2) housing, (3 ) General Plan consistency. The EIR ( Section 4 .2 ) indicates a minor increase in vehicular traffic directly related to new development in the Project Area; an upgraded (to City street standards) Palos Verdes Drive South will enhance traffic movement. Present below-standard road facilities have encouraged vehicular traffic to use alternative roads such as Palos Verdes Drive North and Hawthorne Boulevard; this has increased traffic on these facilities. The primary right-of-way in need of improvement is Palos Verdes Drive South. Improvements to streets outside the Project Area are still needed regardless of the Redevelopment Project. The use of vacant and underutilized land in the Peninsula, outside the Project Area, will have far greater circulation impacts than are anticipated from the limited development within the Redevelopment Project. Traffic safety is the responsibility of all Peninsula entities; upgrading of streets should be conducted by all cities and Caltrans . 146 The Redevelopment Agency (Rancho Palos Verdes) has a Redevelopment Plan which includes State prepared requirements for lower and moderate income housing (C CRL 411 Section 33334 .2 ) . If the City/Agency adopt an active redevelopment project,, edevelo ment 'ect mandated housing provisions will 7 be followed in accord with established law. The Redevelopment Plan was prepared so that it would be in conformance with the adopted General Plan. Page 6 of the EIR contains the map of the Redevelopment Plan. The Redevelopment Plan, according to the Rancho Palos Verdes } Planning Commission, City Staff and Consultants, is in conformance with the General Plan. A copy of the General Plan was distributed to surrounding Cities when it was locally adopted and is also available at Rancho Palos Verdes City Hall for review. 5, 6 and 7: These letters do not require a response. M 41Ofy 147 WASTE WATER RECLAMATION TION DISTRICTS UM= S A N I TA_ 1 COUNTY 1'"'''"11'�''"' � = OF LOS ANGELES COUNTY 1955 Workman Mill Road / Whittier, California Mailing Address: / P. 0. Box 4998, Whittier, California 90607 CHARLES W. CARRY Telephone: (213) 699-741 1 / From Los Angeles (213) 685-5217 Chief Engineer and General Manager October 16, 1984 File No 30-n0.044n/84 Urban Futures, Inc. Rancho Palos Verdes RA-DEIR 14n E. Commonwealth Avenue, Suite 201 Fullerton, CA 92632 Gentlemen: Rancho Palos Verdes Redevelopment Project Area No. 1 The Count y Sanitation Districts are in receipt of a Draft Environmental Impact Report for the subject project. Enclosed is a copy of correspondence to you from the Districts concerning a description of the Districts sewerage facilities in the subject project area. It was the understanding of the Districts that when the Districts was given the opportunity to respond to the City of Rancho Palos Verdes General Plan, that those comments would be included in the DEIR for the Redevelopment Project area. However, none of the comments are included in the DEIR. The "Sewers" section (4.12.2) includes incorrect statements concerning the adequacy of the Districts sewerage system. Because of subsurface conditions, the above ground sewers are the best way of conveying wastewater to the treatment plant. The Districts have the ability to divert flows in the event of a break in one of the lines. The sewers are inspected weekly to ensure that the system operates properly. Your cooperation in forwarding the DEIR to this office for review is appre- ciated. When the EIR is available, please forward two copies to this office for review. If you have any further questions, please contact the undersigned at (213) 699-7411, Extension 350. Very truly yours, A4 idyee7,40. Marvin Holmes Project Engineer Planning Section MH:ait Enclosure 148 C . ,. . _ ,— 44 a IPASilwatii r • 1 Y-79' tS21 !,1. 11:f t :::::M . c 0 U N TY SAN ! ' ifFfOrN • Mi411" IETS 0 „....„-r --� OF LOS ANGELES COUNTY - 1955 Workman Mill Road/Whittier, California CHARLES W. CARRY Moiling Address:/ P.0. Box 4993,Whittier, California 90607 ' Telephone.:(213) 699-7411 / From Los Angeles(213) 6$5-5217 Chief Engineer and General Manager September 5, 1984 • • File 31-150.10.26 Ms. Alice Angus . Associate Planner City of Rancho Palos Verdes . 30940 Hawthorne Boulevard ., . Rancho Palos s Verdes, CA 90274 ' Dear Ms. Angus: Re: Sewerage Facilities Within Redevelopment . Project Area No. 1 of Rancho Palos Verdes you for giving the staff of the Sanitation Districts the oppor- Th ank yo 9 9 tunity to comment on the excerpt from the City's General Plan, a passage dated August 24, 1984. You specifically which you quoted in your letter d g requested that the Districts comment on the accuracy of the excerpt concern- ing deficiencies c�enc�es in the Districts' sewerage facilities. To summarize briefly, � wastewater across the project a the Districts convey area via the Abalone Cove time, wastewater Pumping n Plant and two steel pipelines. For most of p g through the pipelines flows under pressure by gravity t and the pumping plant g • The attached description i on provides more detailed information does not operate. e p on the configuration of sewerage facilities wh i th which serve the project area. The description e ct tio n indicates that there are no i n the Districts' 4 sewerage facilities within the project ect area. In light of this finding, both the pumping plant and the pi pel i nes wi ll be di scussed i n turn. The Districts adequate have ad uate standby facilities at the pump station. main pump fail , a standby pump automatically begins operating. Should the a p P � , y permanently at the Should the standby pump fail,1, an emergency pump located perma. y . pumping plant i s also available. If the electrical system fails, the Di s- deliver ver ort abl a generators to the pumping plant within two hours tracts can P g that these safeguards discovering n 9 the problem. Please bear in mind tha 9 after protect a facility P a i l i t which operates for only about four hours each day. c . o - pipelines m the convey wastewater from As Went•�on..d previously,ou s 1 y, two steel pumping plan t across the slide area. Although each pipe conveys a port i on of the flow under operating r normal o erat i n conditions, each pipeline has enough capacity the entire flow of wastewater. A maintenance crew inspects the to handle pipeline week 1 y to ensure that the system operates properly and to detect incipient probl ems before s i gn i f i cant health h azards develop. _ ___________.••• - ��Cam\--..T..•.--• �- - _ _..■- - -- - : ._ - -. : : -- • - - - -- 149 (- - Ms. Alice• Angus 2 September 5, 1984 n of the lines suddenly fails, it is true that wastewater would If one y spill. In this respect, the excerpt from the City's General Plan is correct. However, the excerpt incorrectly implies that the system is deficient because no shutoff valves are present. Upon discovering a break, Districts' staff would divert all flow at the pumping plant into the operable pipeline. Thus, even if shutoff valves were located at regular intervals along the pipelines, the y would serve no practical purpose in an emergency. If both pipelines suddenly fail, flow would be completely shut down at the pumping plant until one of the pipelines could be repaired. In conclusion, the Districts are required to provide sewerage service under extremely difficult and unpredictable conditions. The current system is costly to maintain; the additional cost of a fourth pump or a third pipeline-would not significantly reduce the risk of a sewage spill if sudden earth movement damaged the pipelines. Under existing circumstances, the current system is the only practical and reasonable solution for conveying wastewater within the project area. If you have any questions, please call the undersigned at extension 201. Very truly yours, Charles W. Carr APP 111/ ' Ro• -r A. Beeken Head, Sewerage Department TC:ed Attachment 150 DESCRIPTION OF SEWERAGE FACILITIES IN THE PROJECT AREA The 9 i i n system is composed of two 14-inch diameter steel pipes aligned P P along the southern edge of Palos Verdes Drive South. Each 14-inch diameter i s capable a of conveying all of the sewage in the project area. The other pipe P 9 t _• provides 100% standby capacity. A total of 48 (24 on each 14 inch steel pipe p ov y pipe) movement isolation sites exist on the system. These sites allow the . normal earth rth movement in the area to occur without affecting the operation of the s tem Weekly maintenance of the parallel steel piping system insures that � . y both th horizontal and vertical alignment are maintained for proper operation of the system. The 14-inch sewers are under pressure at all times. For approximately 20 hours each day, no external force other than gravity is necessary to convey sewage through the system. For approximately four hours each day, pumps are operated at the Abalone Cove Pumpng Plant located at Sea Cove Drive and Palos Verdes Drive South to convey the peak flows through the system. The Abalone Cove Pumping i n Plant was designed with 200% redundancy. A standby pump is provided in the pump station in the event that the one operating pump fails. In addition, an emergency pump is permanently located outside the pumping plant ant i n the event that both pumps should fail. Portable, electrical genera- tors are within two hours transit time to the pumping station in the event of an electrical failure. Should an electrical failure occur during the periods of the day pumping d a when is necessary, only a small portion of the peak flow would have to be stored upstream of the pumping plant, as the bulk of the flow would be conveyed through the 14-inch piping system by gravity. 151 •f C i tn d a break occur i n either of the 14-inch diameter steel pipes, sewage Should woul d spill until maintenance personnel arrived at the scene. Maintenance per- sonnel normally will arrive i n the area within a two hour period and remove the requiring re e force main re ui ri n repair from service. The other 14-inch force main P would continue to provide 100% service for the area. • • fi 1 15 L1 NIVERSITY OF CALIFORNIA, LOS ANGELES UCLA HF:HI:F:I.F:, • I)A,IS • IR\I\F: • LOS ANGELES • RIVERSIDE • SAN DIEGO • SAN FRANCISCO ;? O SANTA BARBARA • SANTA CRUZ THE INSTITUTE OF ARCHAEOLOGY LOS ANGELES,CALIFORNIA 90024 Oct. 15, 1984 Gary E. Pivo Urban Futures, Inc. 140 E. Commonwealth Ave. Suite 201 Fullerton, CA 92632 Re: Notice of Preparation of a Draft Program Environmental Impact Report--Rancho Palos Verdes Redevelopment Project Dear Mr. Pivo: I recently received the above-referenced notice and the enclosed letter from Mr. Rosen. I concur with Mr. Rosen's assessment . The records of the UCLA Archaeological Survey should be searched by a qualified archaeologist to learn if there are any recorded archaeological sites in the area of proposed impact. If such sites do exist there or if there is reason to believe previously unstudied areas may hold sites, field reconnaissance and mitigation should be initiated to avoid destruction of unrenewable cultural resources. Please feel free to call me at (213) 825-1720 if you have any further questions regarding the above. Sincerely, Susan Colby Survey Archaeologist 153 17 Sept. 1984 Gary E. Pivo UrLan Futures, Inc . 143 E. Commonwealth Ave. Suite 201 Fullerton, CA 92632 Environmental ��e ; Notice of Preparation of a D raft Program Impact Report Rancho Palos Verdes Redevelopment Project Dear Mr. Pivo, } I have been asked to comment on the above referenced project. I have ave been away and only today had a chance to review the information sent to me. let me explain that I no longer am affiliated with the First, le XP UCL A Department of Anthropology, the Archaeological Survey or any n • oth er branch of the University. Since Sept. 1980 80 I have mploy �` ed with the California Department of Transportation been e in San Diego. Future correspondence regarding this project should be directed to: Dr. David S. Whitley Chief Archaeologist Institute of Archaeology University of California Los Angeles, CA 90024 like to comment on the proposed redevelopment area I would 1 as an archaeologist who is very familiar with the cultural g involved in the history of the peninsula. I have been in Y excavation and report preparat ion for three sites in the and as my in-laws live only two miles west of peninsula,__ Y of time hiking the project area, I have spent a good deal o g p � around in the area. Under CEQ guidelines uidelines the project area must be assessed for "unique" archaeological resources. At Caltrans we do not . operate under State law but follow Federal regulations. An analogy would be the determination of whether there are any gY cultural resources in the project area which would qualify for inclusion on the National Register of Historic Places. How is such an assessment made? First, an inventory must be done to determine what is present within the project limits. This is n through archival research and in-field reconnaissance. done 6 Fo r the purposes oses of project planning, i .e. , sit e avoidance mostly, to it is best t know what is in the project area as early as possible. The Palos Verdes Peninsula has a rich and diverse ra history, so I believe it is of paramount importance to cultural Y� begin by determining just exactly what resources are extant within your project limits. If I can be of any further assistance please do not hesitate to Y contact me. My new address is listed below. Tha nk y ou for the pP 0 ortunity to comment on this project. } Marty Rosen Since 1 ,�, Viar Ave. 4 7226 15 l San Diego, CA 92120 PALOS VERDES PENINSULA UNIFIED SCHOOL DISTRICT 4110 VALMONTE ADMINISTRATION CENTER 3801 Via La Selva• Palos Verdes Estates 90274 (213) 378-9966 November 2, 1984 Mr. Donald Guluzzy, City Manager City of Rancho Palos Verdes 30940 Hawthorne Boulevard Rancho Palos Verdes , CA 90274 Dear Mr. Guluzzy: The Palos Verdes Peninsula -Unified School District has submitted a response to the Draft Environmental Impact Report for the Rancho Palos Verdes Redevelop- ment Plan which is attached. A copy has been sent to Urban Futures , Inc. If further clarification of the district response is needed, please contact me . Sincerer 1 (Jak Price LSu_er intendent eb Enc . c . Urban Futures , Inc . 155 411 PALOS VERDES PENINSULA UNIFIED SCHOOL DISTRICT . RESPONSE TO DRAFT ENVIRONMENTAL IMPACT REPORT FOR RANCHO PALOS VERDES REDEVELOPMENT PLAN This response will include the District' s concern that the r financial effect of the establishment of the Redevelopment Plan will not adversely affect the District's financial situation, the need for housing for students in the event the Redevelopment Plan generates students beyond the capacity of the district facilities and several elaborations on data provided in the draft Environmental Impact Report . It is the understanding of the District that if the Redevelopment Plan is approved prior to January 1, 1985, that any income which may be decreased by the establishment of the Redevelopment Plan will be provided by the State. I f the Redevelopment Plan is approved after January 1 , 1985 , then the Redevelopment Agency will provide , directly to the school district , the funds which would normally be generated for the benefit of the District. If that understanding is not correct,- the District requests that any varying information from that interpretation of state law be provided immediately to the District. 411If the plan is approved prior to January 1, 1985, and subsequent legislation results in the District receiving less funds than would normally be received , the District would want the Redevel- opment Agency to provide the amount of funds which would otherwise be lost . If the plan is adopted after January 1, 1985 , the District wishes to insure that the funds which are provided by the Redevelopment Agency are distributed to the District in the same manner as they would normally be distributed through the state apportionment system or in advance of the normal cycle of state apportionment. (Monthly distribution as follows of the total annual amount: July, 6%; August, 12%; September through January, 8% each month; and February through June, approximately 8.4% each month. ) With . . . . . . . . . ��lith the above described conditions being met, it is anticipated that the District will not experience a significant impact in financial resources . A statement in the final Environmental Impact Report accepting these financial conditions will result in the District not experiencing a negative financial impact. The need for housing students is not adequately reflected in the table on Page 85 , regarding school f a c i l i t i e s. I t should be Aftnoted that the capacity figures are from December , 1983 , data and include re loca table classrooms which in some instances are no longer on the school campuses . 156 !II In addition, the need for educational services will continue to change over the ne xt fort y y ears (the period described as the timeframe for this Redevelopment Agency). The District now has computer classrooms in each of the district schools which provide a needed educational opportunity. This reduces the capacity of the school by the number of students who would otherwise be in the self-contained classrooms where the computers are located. The usage of classrooms for special education students also lowers the capacity due to state-imposed maximum class sizes for special ial education programs. The capacity figures of the schools P ,. are , therefore , different now than they were in December , 1983 , and they w i 1.1 continue to be revised in the future. I f the riw th in the student population in the Redevelopment Agency results in an increase in the number of students beyond the district-established capacity of the school at that time , the Redevelopment Agency should be required to provide housing for those students . A statement in the final Environmental Impact Report indicating the Redevelopment Agency's willingness to provide that housing will result in an interpretation that the project will not result in any significant impact on public ti educational facilities. The elaboration on data in the report includes the fact that the district currently operates eight elementary schools and one site which includes a pre-kindergarten program. In addition to the three high schools, a continuation high school was established in the fall of 1984, Rancho del Mar Continuation High School. The district recognizes that if the financial and housing conditions described in this response are adopted within the final Environmental Impact Report for the Redevelopment Plan , then there will be no significant negative impact on public education . 157 JEROME BELSKY malw 0 PETER M.WEBER - -: :_ , Motor Pro-Tent _ �;.- , HIGH MULLER - • THE CITY OF Cciuncilman • VWARREN SCHV1 ARZMA1�h r., ROLLING ESTATES HILLS Councilman N E L L M I R ELS h 4045 PALOS VERDES DRIVE NORTH • ROLLING HILLS ESTATES,CA.X0274 Counrii 14 Oman _ - TELEPHONE—377-1577 HARRY PEACOCK pppC Cup Manager C7OC= November 2, 1984 Urban Futures, Inc. Rancho Palos Verdes RA-DEIR 140 E. Commonwealth Avenue, Suite 201 Fullerton, California 92632 Dear Sirs: We are in receipt of the draft Environmental Impact Report for the Rancho Palos Verdes Redevelopment Plan, and appreciate the opportunity to comment on it. It is felt that this project is certainly a laudable project, and will have great ill/ benefit for the residents in and around the Redevelopment Plan. However, there are a couple of areas we feel require further study before the Environmental Impact Report should be certified and deemed to be adequate. The first area of concern is in regards to traffic and vehicular circulation. Traffic and vehicular circulation has been a long-time concern, and the inter- action between our two Cities is evidence of that. This includes both Cities' concern over the location and development of the Courtyard Mall within the Peninsula Center, and the expansion of Marineland' s parking lot that was discussed in 1978 and 1979 and ended up in a settlement agreement between the two Cities regarding any future expansion of Marineland and additional traffic generation. The draft Environmental Impact Report makes mention that the redevelopment project is expected to stimulate the construction of three to five hundred new lower density dwellings, and that additional vehicular traffic is to be between 3,000 and 6,500 trips daily, most of which will be on Palos Verdes Drive South. The only mention made in terms of mitigating traffic impacts are two sentences indicating that Peninsula intersection improvements north of the project area will be needed for safety as well as a smooth flow of anticipated increased traffic. It further identified Palos Verdes Drive North and Pacific Coast Highway and their intersections with principal crossing and connecting streets. 411/ 158 Urban Futures Inc., Rancho Palos Verdes RA-DE I R November 2, 1984 Page 2. It is felt that traffic circulation must be extensively reviewed in the draft Environmental Impact Report to include specific recommendations for street improvements outside the project area to include those in adjacent cities. Also, discussion of the actual amount of additional trips on the few arterials leading in and out of the project area must be identified and discussed, to include but not limited to Hawthorne Boulevard. Additionally, the mitigation measur eq-must be much more extensively reviewed and analyzed. The second area of concern is in regards to housing. The State Redevelopment Law requires inclusion of a certain amount of low and moderate income units in any redevelopment project. This should be further discussed in the Draft Environmental Impact Report. The third area has to deal with conformance of the plan with the City' s General Plan and Coastal Plan. The report states that the redevelopment project is in conformance with those but does not elaborate further. At a minimum, it is suggested that the Land Use Element Map for this area and local Coastal Plan Map for this area be displayed within the report so that the Redevelopment Plan can be contrasted against them. Further elaboration on conforming with the General Plan and Coastal Plan would be desirable. In conclusion, it is felt that the three areas discussed above should be further reviewed and analyzed and included as part of the draft Environmental Impact Report before the document is deemed to be adequate and certifiable. Sincerely, AL(,, BRUCE A. LENOROVITZ Planning Director BAL/sf cc: Donald F. Guluzzy, Executive Director, RPV Redevelopment Agency 159 STATE OF CALIFORNIA—OFFICE OF THE GOVERNOR GEORGE DEUKMEJIAN, Governor OFFICE OF PLANNING AND RESEARCH • 1400 TENTH STREET et1;1-d ORAMENTO, CA 95814 w• November 5, 1984 Mr. Jack Segal Rancho Palos Verdes Redevelopment Agency 140 E. Commonwealth Avenue Fullerton, CA 92632 Subject: SCF{# 34081511 , Rancho Palos Verdes Redevelopment Plan Dear h r. Segal : The State Clearinghouse submitted the above named draft Environmental Impact Report (EIR) to s l.ected state agencies for review. The review period is closed and the com- ments of the individual agency(ies) is(are) attached. If you would like to discuss their concerns and recommendations, please contact the staff from the appropriate agency(ies) . When preparing the final EIR, you must include all comments and responses (cEQ Guidelines, Section 15132) . The certified EIR must be considered in the decision- making process for the project. In addition, we urge you to respond directly to the commenting agency(ies) by writing to them, including the State Clearinghouse number on all correspondence. In the event that the project is approved without adequate mitigation of significant effects, the lead agency rust make written findings for each significant effect and it must support its actions with a written statement of overriding considerations for each unmitigated significant effect (cEQP Guidelines Section 15091 and 15093) . If the project requires discretionary approval from any state agency, the Notice of Determination must be filed with the Secretary for Resources, as well as with the County Clerk. Please contact Mark Boehme at (916) 445-0613 if you have any questions about the environmental review process. Sincerely, -4V;;4; 41.9/ John B. Ghanian Chief Deputy Di r- .r cc: Resources Agency attachment 160 State of California Memorandum Christine Go ' Date : October 29, 1984 Ms Gogg � State Clearinghou- = e Place : Sacramento N0V021984 5tt. giai1giouIe 1 From : Department of Food and Agriculture ,Subject: SCH Number 84081511 - Rancho Palos Verdes Redevelopment Project Draft EIR Subsequent to the meeting of September 14, at the Office of Planning and Research,my office has reviewed the above draft Environmental Impact Report . This document discusses the impacts associated with the implementation of a redevelopment plan, covering 1,100 acres, in the City of Rancho Palos Verdes. 1 . The EIR states that the main objective of this project is to eliminate physical and economic blight; through the stabilization of a significant geologic hazard, namely, the active Portuguese Bend Landslide. We note that the overall redevelopment plan consists of other possible projects, in order to mitigate the movement of the slide. These may include: a. Earth movement and grading; b. Installation of dewat er in g wells; c. Surface drainage trenches; and d. Beach and bluff erosion control. 2. Secondly, adoption of this redevelopment project may increase residen- tial dwellings by 300-500 units. However, this additional residential development is consistent with the Rancho Palos Verdes General Plan land-use designations, and represents inf i l l growth. 3. With the exception of several small cultivated plots in "Area C" of the project, implementation of the redevelopment plan will not cause a significant impact to agricultural productivity. In fact, the project will enhance upgrading opportunities for existing land-uses. 4. Finally, with respect to minimizing impacts to coastal vegetation and wildlife, there are adequate mitigation measures contained in the project. For example, several measures include: 161 SURNAME I 1 1 1 Ms. Christine Goggin Page Two October 29, 1984 a. Replanting Coastal Sage Scrub/Chaparral, following earth moving activities; and b. Practicing erosion control and silt containment, in order to prevent unnecessary silt to nearby marine habitats. Thus, because we recognize the long-term benefits resulting from the Rancho Palos Verdes Redevelopment Project, the California Department of Food and Agriculture recommends this draft EIR, as submitted, be approved. M 1 Harry J. trade Assistant Director Special Assignments (916) 445-0682 410 162 STATE OF CALIFORNIA—OFFICE OF THE GOVERNOR GEORGE DEUKMEJIAN, Governor OFFICE OF PLANNING AND RESEARCH . .: TENTH STREET •-�-tom' °, AMENTO, CA 95814 _ t) November 6, 1984 (916/445-0613) Mr. Jack Segal '1 Rancho Palos Verdes Redevelopment Agency 140 E. Commonwealth Avenue Fullerton, CA 92632 Subject: k SCH# 84081511 , Rancho Palos Verdes Redevelopment Plan Dear Mr. Segal : The enclosed comments on your draft environmental documents were received by the State Clearinghouse after the end of the state review period. We are forwarding these comments to you because they provide information or raise issues which may assist you in project review. 411/ To ensure the adequacy of the final document you may wish to incorporate these additional comments into the preparation of your final environmental document. Sincerely. 11C;;;;;if4914/ John B. Cbanian Chief Deputy Director enclosure cc: Resources Agency 163 :.Stag of California The Resources Agency :Memorandum 411 To : 1 . Projects Coordinator D: October 23, 1984 Resources Agency 2. Rancho Palos Verdes Redevelopment Agency 140 E. Commonwealth Avenue Fullerton, California 92632 From : Department of Fish and Game • Subject: Draft Environmental Impact Report (EIR) , Rancho Palos Verdes P P Redevelopment Project, Los Angeles County, SCH 84081511 The document, written as a programmatic EIR, describes project elements and related projects in general terms. It also discusses impacts to water quality, vegetation (both terrestrial and aquatic) , terrestrial wildlife, and marine resources including mitigation measures which should be addressed during specific phases of the project. In that regard, it is our view that mitigation measures outlined on pages 44, 45, and 57, 58 should be implemented when necessary to offset project-specific impacts. We recommend that a supplemental EIR be prepared for each specific project and that specific mitigation measures be included. If a proposed project can be modified or mitigated to eliminate or offset impacts, then a Negative Declaration would be appropriate. This document is adequate in its description of vegetation, wildlife, and marine resources within the planning area and in terms of proposing general measures which could be used to mitigate possible project impacts. Should you have any questions the Department contact is Rolf Mall , Environmental Services Supervisor, Marine Resources Region, 245 West Broadway, Suite 350, Long Beach, California 90802. His phone number is ATSS 635-5155 or (213 ) 590-5155. Jack . Parnell Director REcrmAn ft'nV 61984 state 164 Res•onse- to Comment b Mr . David G. Cameron re•resentin• Mr . and Mrs. Richard T. Bara This comment was received after the close of the EIR comment period and is therefore being responded to separate from the other comments . Impacts on historical structures were considered during scoping for the EIR, and the Notice of Preparation and draft EIR were provided to the State Office of Historic Preservation for comment. Impacts were considered unlikely because there are no 4r structures in the Project Area that are registered with the State Office of Historic Preservation. Structures of purely local significance may occur in the area. Mr . Cameron's letter suggests a few structures that may be locally important , but gives no source for his designations . At tAe present time, there are no plans to relocate or damage known historical structures. Slide stabilization will affect few, if any, structures. Should the Agency actions to stabilize the landslide threaten any structure, an environmental review pursuant to CEQA will be conducted, and mitigation measures will be adopted. Part of this review includes the consideration of historical resource values. The EIR is adequate because the proposed Plan is not expected to affect any known designated historical structures. The State EIR Guidelines state that "an EIR shall identify and focus on the significant environmental effects" (Section 15126) . The impact on historical structures will not be significant and was therefore not a subject of focus . 165 DAVID G. CAMERON ATTORNEY AT LAW P.O. BOX 61 1 SANTA MONICA. CALIFORNIA 90406 • TELEPHONE (213) 3S084 452-0914 7 November 1984 Honorable Jackie Bacharac h, Mayor Honorable Douglas Hinchlif fe , C ounc ilmember Honorable John C . McTaggart , Councilmember Honorable Melvin W. Hughes , Counc ilmember RECEIVED Honorable Robert E . Ryan , Grounc ilmenber Mr . Donald F. Gluzzy, City Manager �tiOV 8- 1984 City of Rancho Palos Verdes CITY OF 30940 Hawthorne Boulevard RANCHO PALOS VERGES Rancho Palo,_§ Verdes , CA 90274 Re: Draft Environmental Impact Report Rancho Palos Verdes Redevelopment Project Honorable Mayor , C ounc ilmer&thers , and City Manager: I am , for the purpose of submitting comments on the above-captioned Draft Environmental Im aac t Report (hereinafter DEIR) , representing Mr . nd Mrs . Richard T. Bara , who reside a on property they own located within the proposed Redevelopment Project Area . While the DEIR states (p. 4) that it "has been prepared to comply with the California Environmental Quality Act (CEQA.) , [and] State EIR Guidelines . . ." it is our contention that Section 4.8 of the DEIR, "Cul- tural and Archaeological Resources ," p. 60 , and other related sections (such as the Impact Matrix , p. 2 , and Sections 5 through 9 , ply. 88-95 ) fail to comply with the State Guidelines , and hence with CEQA . Section 4.8 , as it appears in the DEIR , attempts to deal with subsurface (i. e . , archaeological and paleontological) resources , but fails completely to ,j address above-ground resources , such as buildings , other structures , or landscaping of historic , architectural , or other cultural .significance . The State CEQA Guidelines (Title 14 , California Administrative Code , Division 6 , Chapter 3) provide , in Section 15064: " (a) Determining whether a project may have a significant effect plays a critical role in the CEQA process . . . ." " (e) Some examples of consequences which may be deemed to be a significant effect on the environment are contained in A,--- ppe: d ix G." A,ve na ix G states , in pertinent part: "A project will normally have a significant effect on the en- vironment if it will: . . .(j ) Disrupt or adversely affect a prehistoric or historic archaeological site or a pro.)erty of historic or cultural si nifi- Honorable Mayor , C ounc ilraernbers . . . 7 November 1984 City of Rancho Palos Verdes Page 2 c anc e to a community or ethnic or s oc is l.gr oup; or a paleonto- logical site except as part of a scientific study, . . ." (em- • phasis supplied) This makes clear that more than subsurface (archaeological or pale- ontological) resources must be considered. The suggested Environ- mental Checklist Form for completion by the Lead Agency (Appendix I to the State CEQA Guidelines) is also instructive; under Section II , Environmental Impac is , Topic 20 , Cultural Resources , includes Ques- tion b. , "Will the proposal result in adverse physical or aesthetic effects to a prehistoric or historic building�atructure , or object?" (emphasis supplied) _ r The inadequate scope of Section 4.8 of the DEIR , p. 60 , and re- lated passages (such as the Impact Matrix , p. 2 , and Sections 5 through 9 , pa. 88-95) is far from academic; a cursory review of the proposed Redevelopmmnt Project Area has identified the following buildings , other structures , landscaping and other above-ground resources of prob- able major historic , architectural or other cultural significance: 1. Harry E . Benedict Estate ("Villa Francesca" ) 2 . Edward Walker Harden and Ruth Vanderlip Harden Estate (Por- tuguese Point Gatehouse) 3 . Narc i s s a Gatehouse 4. (The so-called) Warner Estate 5 . "The Villetta ," also known as "Villa Narcissa" (Frank A. Van- derlip Guest House) 6. "The Farmstead" (Portuguese Bend Riding Club) 7 . "The Cottage" (Frank A . Vanderlip Residence) This enumeration should not be relied on as being exhaustive; it is submitted as an indication of the inadequacy of the DEIR , wh is h must be remedied by surveying the proposed Redevelopment Project Area for buildings , other structures , landscaping and other above-ground resources of possible significance . Only after completion of a can thorough survey g survey the impacts on such resources be evaluated , ari necessary mitigation planned , as required by law. Ver ,' truly yo l -!%■-; 44.1.-CiPb David G. Cameron cc: California State Office of Historic Preservation P. O. Box 2390 Sacramento , CA 95811 411 167