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<br /> <br />Foothill Sanitary Landfill Page 48 of 52 San Joaquin County DPW - Solid Waste <br />Joint Technical Document Revised 12/04/2025 <br /> <br />At the Foothill Sanitary Landfill, contributions of moisture from outside sources to the <br />waste mass is limited because: <br /> <br />x Surface water management consists of diverting surface water run-on away from <br />active areas of the landfill. <br />x Daily cover is placed which limits infiltration of precipitation that falls directly onto the <br />landfill. <br />x A final cover will be constructed over all fill areas which will minimize infiltration into <br />the waste mass. <br /> <br />Landfill staff periodically inspects the cover on filled modules for low spots that could <br />allow for ponding water and make repairs as necessary. LF-1 does not have a leachate <br />collection and recovery system. Module 1 and all future modules will include a leachate <br />collection and recovery systems (LCRSs). <br /> <br />Leachate in Module 1 drains by gravity to the sump located in the southeast corner of <br />the module, from which it is pumped either to the 10,000-gallon storage tank or returned to the <br />refuse over an approved liner in accordance with the WDRs. Leachate generated from Module 1 <br />flows to a leachate sump from which it is pumped either to a storage tank or to infusion points <br />installed in the refuse filled areas in accordance with the WDRs. <br /> <br />Leachate from the storage tanks of future modules is ultimately returned back to the <br />waste in the same lined module in accordance with the regulations. <br /> <br />The public is not allowed to enter or be near any of the leachate control facilities of the <br />site. Site personnel monitor any breaches in security. Infusion points are designed and <br />installed away for active phase areas. Application of leachate directly to the refuse is away from <br />public access areas.