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from the unit gathers into a sedimentation basin at the southeast corner of Module 1. There were <br /> no breeches to any of the run-on/run-off facilities during this monitoring period. <br /> OTHER ANALYSIS <br /> 1 Groundwater samples were collected from landfill supply well LW-1 and analyzed for all <br /> monitoring and field parameters. The well is not a point of compliance, as stated in the WDRs. <br /> iLEACHATE COLLECTION AND RECOVERY SYSTEM - PROCEDURES & <br /> MAINTENANCE <br /> iFacilities <br /> The leachate collection and recovery system(LCRS) for Module 1 was designed in accordance <br /> with Title 27, Section 20340(g). This system consists of: <br /> • East/west oriented collection troughs running the entire length of Module 1 <br /> • A 4-foot deep sump at the southeast corner of the Module <br /> • A leachate removal pump installed in an 18-inch diameter HDPE pipe <br /> • A 2-foot deep secondary extraction trench beneath the primary composite liner, with <br /> 12-inch HDPE riser pipe <br /> • A pumping system that allows recording of leachate flows and volumes <br /> • A 10,000 gallon leachate storage tank <br /> tPumping <br /> Leachate drains by gravity to the Module 1 sump, from which the pump installed in the sump <br /> pumps it to the 10,000-gallon storage tank. The pump operates automatically, based on leachate <br /> level within the sump. Control points for the pump are: <br /> Pump Off: 17" Pump On: 43" Alarm:48" <br /> Operation of the pump is conditional upon sufficient water in the sump and available capacity in <br /> the leachate tank. Electrical controls include a high level alarm set at the maximum design <br /> leachate level for the sump. The alarm is activated if the leachate exceeds the alarm level. The <br /> alarm level is chosen to maintain the head on the module base below the maximum allowed 12 <br /> inches. <br /> The leachate storage tank facility includes secondary containment (consisting of a concrete vault <br /> surrounding the tank) and a truck loading area. Electrical controls for the leachate storage tank <br /> include a high level sensor that will sound an alarm and disable the leachate sump pump to prevent <br /> overtopping of the tank. <br /> Foothill Sanitary Landfill 10 Department of Public Works/Solid Waste <br /> 1*t Semester 2009 Groundwater Monitoring County of San Joaquin—July 31,2009 <br />