Reso 2022-085 Approving Third Addendum and Planning Entitlements

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pavement markings as approved by Engineering & Transportation Department and Planning Division. The ultimate improvements shall include but are not limited to a separate pedestrian path of travel crossing Fairway Drive, a separate golf cart crossing separate from the pedestrian crossing, RRFB (Rectangular Rapid Flashing Beacons) system at the new crosswalk location, replace portion of the median, curb, gutter, sidewalks, asphalt pavement and concrete pavement along path of travel, removing and reinstalling median island including street trees, landscaping and irrigation, ADA-accessible ramps, signing and pavement striping, and any additional frontage improvements as determined by the City Engineer, prior to Acceptance of Improvements. 33. Prior to grading permit issuance, updated Geotechnical Reports shall be submitted that, at minimum, address the following pursuant to Mitigation Measure GEO-1 and GEO-3: a. The potential earthquake related impacts of strong ground shaking amplification due to the soft underlying sediments. b. Seismic ground motion parameters in accordance with Building Code requirements. C. The potential for lateral spreading. Where necessary, corrective measures shall be included in the required design -level geotechnical report(s) and implemented during construction. These measures could include retaining structures to stabilize channel margins, use of deep foundations, removal or improvement of liquefiable soils, and/or the use of relatively rigid foundations. d. Settlement of the existing fill and Bay Mud and options to mitigate these effects, including use of shallow ridged foundations for smaller structures, supporting larger structures with deep foundations such as driven piles (if necessary), and installing flexible connections for utilities. Pre -loading consolidation (surcharging) priorto construction of new improvements could also be considered. The recommendations for both special foundations and other geotechnical engineering measures specified in project specific geotechnical reports shall be implemented during design and construction pursuant to Plan Check. e. Specific recommendations for mitigation of expansive soils under pavements and structures, including techniques such as capping expansive soils with a layer of non - expansive fill, or by lime treatment. Typical mitigation measures for pavements could include special pavement design, lime treatment of subgrade soils and/or sub -excavation of expansive soils and replacement with non -expansive fill. These recommendations shall be based on testing of the in -site fill materials. The recommendations shall be submitted to the City as a part of Plan Check applications prior to building and/or paving plan submittal. 34. Pursuant to Mitigation Measure GEO-3A, project -specific geotechnical reports shall be prepared at the time of Plan Check applications in accordance with the City's grading permit regulations. The recommendations for both special foundations and other geotechnical engineering measures specified in project specific geotechnical reports shall be implemented during design and construction. These measures may include use of deep foundations engineering and removal or improvement of potentially liquefiable soils. Documentation of the methods used shall be provided in the required design -level geotechnical report(s). All plans submitted for grading permits shall incorporate all design and construction criteria specified in the updated Geotechnical report(s). The geotechnical engineer shall sign the improvement plans and approve them as conforming to their recommendations prior to issuance of grading permits. All project -related grading, trenching, backfilling and compaction operations shall be conducted in accordance with the City of San Leandro Engineering and Transportation Department's Standard Plans and the recommendations in the updated Geotechnical Reports. Recommended Conditions of Approval June 21, 2022 PLN22-0008, PLN21-0020 & PLN21-0021 Page 8 of 39