PC 2001-36 - Laserfiche WebLink

Resolution No. PC-01-36 Page 13 Geotechnicai Report 52. The applicant shall comply with the recommendations of the geotechnical reports prepared by Terrasearch, Inc., dated July 15, 1998 and August 6, 1999, and peer review reports by Alan Kropp & Associates, Inc., dated July 22, 1999 and September 7, 1999. The applicant's geotechnical consultant shall review and approve all foundation, retaining wall, and drainage geotechnical aspects of the final development plans to ensure that the recommendations have been properly incorporated into the development. The consultant shall certify by writing on the plans or as otherwise acceptable to the Director of Building Inspection that the final development plan is in conformance with the geotechnical report approved with the project. Additionally, subdrains of varying depths shall be required to be installed at the base of all cut slopes, subject to the review and approval of the City Engineer. 53. The applicant shall arrange and pay for the geotechnical consultant to be present on site during grading and excavation operations. The results of the inspections and the as-built conditions of the project shall be certified in writing by the geotechnical consultant for conformance to the approved plans and geotechnical report and submitted to the City Engineer and Director of Building Inspection for review and approval prior to occupancy. 54. On expansive soils with moderately high shrink-swell potential (Perkins loam and Pleasanton and Positas gravelly loam), building foundations and improvements shall consist of drilled pier and grade beams, deepened footings (extending below expansive soil), or post-tensioned slabs. Alternatively, expansive soil shall be removed and replaced with compacted non-expansive soil prior to foundation construction. The geotechnical report for each phase of the project shall require that subgrade soils for pavements consist of moisture-conditioned, lime-treated, or non-expansive soil, and that surface (including roof drainage) and subsurface water be directed away from foundation elements to minimize variations in soil moisture. 55. The applicants shall adhere to the soil-gas survey report by Terrasearch, Inc., dated August 2, 1999. Additional soil-vapor sampling shall be done along the eastern edge of the project site at 50 fi. intervals. In the event methane gas is found exceeding acceptable levels, the applicants shall work with Pleasanton Garbage Service to design and complete improvements to the design of the vapor- collection system on the old landfill site. The costs associated with these changes to the collection system shall be the responsibility of Pleasanton Garbage Service. The additional sampling shall be completed prior to the recordation of the final map. All necessary modifications to the collection system shall be completed prior to issuance of a building permit for the homes, unless otherwise approved by the City Engineer.