Fruitvale Transit Village (Phase 2) Initial Study - City of Oakland

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Initial Study and Environmental Review Checklistb) The majority of the project site is currently paved, and the proposed project will develop theentire project site. Some earthwork activities associated with construction activities will disturbsubsurface soils. To minimize wind or water erosion on the site during construction activities thatinvolve earthwork, the applicant shall be required, in accordance with standard City practices, tosubmit a construction period erosion control plan to the Building Services Division for approvalprior to the issuance of grading and building permits, consistent with standard City practices. Theplan shall be in effect for a period of time sufficient to stabilize the construction site throughoutall phases of the project. Long-term erosion potential shall be addressed through installation ofproject landscaping and storm drainage facilities, both of which shall be designed to meetapplicable regulations. These requirements are embedded in the following uniformly-appliedstandard condition of approval that will apply to the project. Implementation of this standardcondition of approval will ensure the project impact is less than significant.STANDARD CONDITION GEO-2: (Grading Permit)Prior to any grading activities1) The project applicant shall obtain a grading permit if required by the OaklandGrading Regulations pursuant to Section 15.04.780 of the Oakland Municipal Code.The grading permit application shall include an erosion and sedimentation controlplan for review and approval by the Building Services Division. The erosion andsedimentation control plan shall include all necessary measures to be taken to preventexcessive stormwater runoff or carrying by stormwater runoff of solid materials on tolands of adjacent property owners, public streets, or to creeks as a result of conditionscreated by grading operations. The plan shall include, but not be limited to, suchmeasures as short-term erosion control planting, waterproof slope covering, checkdams, interceptor ditches, benches, storm drains, dissipation structures, diversiondikes, retarding berms and barriers, devices to trap, store and filter out sediment, andstormwater retention basins. Off-site work by the project applicant may be necessary.The project applicant shall obtain permission or easements necessary for off-sitework. There shall be a clear notation that the plan is subject to changes as changingconditions occur. Calculations of anticipated stormwater runoff and sedimentvolumes shall be included, if required by the Director of Development or designee.The plan shall specify that, after construction is complete, the project applicant shallensure that the storm drain system shall be inspected and that the project applicantshall clear the system of any debris or sediment.Ongoing throughout grading and construction activities2) The project applicant shall implement the approved erosion and sedimentation plan.No grading shall occur during the wet weather season (October 15 through April 15)unless specifically authorized in writing by the Building Services Division.c) According to the preliminary geotechnical investigation previously conducted for the project site,the subsurface materials consists of approximately four to eight feet of fill underlain by denseclayey sand with gravel, clayey gravels, and hard clays to the maximum depth explored in eachboring, which varied from 30 to 82 feet below ground surface (Treadwell & Rollo, 2005). Theclay in the fill materials, based on laboratory testing, was determined to be highly expansive.Fruitvale Transit Village Phase 2 44 ESA / 208475Initial Study December 2008
Initial Study and Environmental Review ChecklistAs noted above under criteria (a.i) through (a.iii), a design level geotechnical investigation, asrequired by the City, will determine the appropriate foundation system to mitigate unstable soilsas is standard practice for the industry. The preliminary investigation has already providedrecommendations for measures to mitigate the identified expansive soils onsite. In accordancewith standard City practices, and in conformance with current codes and regulations, the projectsponsor shall be required to submit detailed engineering drawings and materials to the BuildingServices Division prior to excavation, grading, or construction on the site. This measure willensure that the building is designed and built in conformance with the requirements of the City ofOakland Building Code and the applicable provisions of the CBC. Therefore, the proposedproject will not result in substantial risks to life or property due to unstable or expansive soil withapplication of Standard Condition GEO-1 presented above, and the potential impacts associatedwith these conditions are less than significant.d) The project site is not located on a site subject to the conditions identified in (d) or (e), nor is itlocated on a current or former known landfill. Therefore, the potential impact is less thansignificant.e) See discussion d), above.f) The proposed project will connect to the existing central sewer system, which provideswastewater collection service for the City of Oakland. Therefore, the project will not requireseptic tanks or alternative wastewater disposal systems and the project will have no impact fromsuch conditions.ReferencesAssociation of Bay Area Governments (ABAG). Earthquake Intensity Map for East Oakland from theNorth and South Hayward Fault Segments, http://www.abag.ca.gov/cgi-bin/pickmapx.pl (accessedOctober 3, 2008).BKF Engineers/Surveyors/Planners. Fruitvale BART Housing, Tentative Parcel Map No. 9662, ExistingConditions and Demolition Plan (April 1, 2008).City of Oakland. Oakland General Plan, Open Space, Conservation and Recreation Element (June 1996).HKIT Architects, Fruitvale BART Housing, Oakland, CA, Site Plan/Project Info., Job #60121, preparedfor Signature Properties (April 21, 2008).State of California Division of Mines and Geology. Seismic Hazard Zones Map, Oakland WestQuadrangle (February 14, 2003).Treadwell & Rollo. Geotechnical Investigation Fruitvale Transit Village, Phase 2 (December 16, 2005).Fruitvale Transit Village Phase 2 45 ESA / 208475Initial Study December 2008
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Fruitvale Transit Village (Phase 2) Initial Study - City of Oakland

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