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and removal system will be constructed in each module before ' <br /> refuse is deposited. <br /> CURRENT MONITORING AND CONTROL SYSTEMS <br /> Ground Water <br /> Much of the ground water in the eastern part of San Joaquin <br /> County is taken from sand and gravel layers within the Arroyo <br /> Seco, Laguna, and Mehrten Formations. The groundwater obtained <br /> from these formations is continually being recharged by <br /> percolating surface waters which originate in the Sierra Nevada <br /> or adjacent foothills. In addition to the 3 on-site wells, there <br /> are 3 wells within a one mile radius of the site (Figure 2) . <br /> The local ground water gradient is gentle. Ground water <br /> generally flows south-southwest. The water table has been <br /> steadily decreasing over the years and ranges from about 195 to <br /> 250 feet below the ground surface at the landfill site, which is <br /> approximately 55' to 61' above mean sea level (MSL) . <br /> The State Regional Water Quality Control Board (RWQCB) has issued <br /> a monitoring and reporting program for the site. The program <br /> number is Waste Discharge Requirement (WDR) order 91-020 . The <br /> initial ground water monitoring system consists of one <br /> upgradient monitoring well (MW-1) , one downgradient monitoring <br /> well (MW-2) , and a water supply well (LW-1) that is being <br /> utilized as a downgradient monitoring point (Figure 3) . More <br /> monitoring wells will be added as the landfill is developed. <br /> The wells are equipped with individual dedicated pumps which are <br /> used for sampling. <br /> The wells are sampled quarterly for the parameters called for in <br /> the WDR's (Appendix A) . The samples will be handled according to <br /> 'the sampling and analysis procedures outlined in Appendix B. <br /> Nuisance and Health Factors <br /> Unauthorized access by motorcycles and other off-highway vehicles <br /> is currently controlled by gates and fencing around the entire <br /> site. All access points are controlled by gates that are locked <br /> when the landfill is not open. <br /> Dust is controlled by periodically watering the haul roads with a <br /> water truck which is kept on-site at all times. <br /> Litter is controlled by installing litter fences downwind from <br /> the working face. Also, landfill workers keep the area free of <br /> litter. <br /> 4 <br />