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improvements shall consist of drilled pier ant :::fade beams, deepened <br />footings (extending below expansive soil), o.- ?ost-tensioned slabs. <br />Alternatively, expansive soil shall be removv2 and replaced with <br />compacted non-expansive soil prior to foundz:ion construction. The <br />geotechnical report for each phase of the pro.:v:t shall require that sub~ade <br />soils for pavements consist of moisture-cond~soned, lime-treated, or <br />non-expansive soil, and that surface (includir__z roof drainage) and <br />subsurface xvater be directed away from foun/2tion elements to minimize <br />variations in soil moisture. All subdrains shv2~ have cleanout installed at <br />the beginning of the pipe. The bottom of the ?:?e shall terminate in a storm <br />drain or other storm drain outfall, subject the z?proval of the City Engineer. <br />The applicant's engineer shall submit a final ?bdrain location map to the <br />Ciw Engineer prior to acceptance of the publ!: improvements. It shall be <br />the responsibiliw of the homeowner to reloca:e the subdrains, if during the <br />excavation of a pool or other subsurface strucrzre the subdrains are <br />encountered. All owners within the subdivisic: shall receive notice of these <br />subdrain locations. The perimeter of all buildS:g foundations shall be <br />designed with subdrains. Said drains shall be :onnected to the street gutter <br />or other means acceptable to the City Engine~. <br /> <br />55. The applicants shall adhere to the soil-gas sur. ey report by Terrasearch, <br /> Inc., dated Augnst 2, 1999. Additional soil-vz?or sampling shall be done <br /> along the eastern edge of the project site at 5¢ _5. intervals. In the event <br /> methane gas is found exceeding acceptable le'. els. the applicants shall work <br /> with Pleasanton Garbage Service to design ant complete improvements to <br /> the design of the vapor-collection system on t?.e old landfill site. The costs <br /> associated with these changes to the collection system shall be the <br /> responsibili~ of Pleasanton Garbage Service. :-he additional sampling <br /> shall be completed prior to the recordation of-i:e final map. All necessary <br /> modifications to the collection system shall be :ompleted prior to issuance <br /> ora building permit for the homes, unless otl~e:xvise approved by the City <br /> Engineer. <br /> <br />Miscellaneous <br /> <br />56. <br /> <br />57. <br /> <br />This development plan shall be of no further x zlidity and the applicant shall <br />be required to submit the same or new develo.rrnent plan for City approval <br />prior to development of the site in the event tkz: a final map is not recorded <br />within 2 years of PUD approval. <br /> <br />Unless a phasing plan for improvements is ap.rroved by the Planning <br />Director. the applicant shall complete all of the on-site improvements at one <br />time (including all improvements around future building pads). All <br /> <br />Page 12 <br /> <br /> <br />