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waste. No hazardous wastes were accepted at the landfill. The <br /> Harney Lane Sanitary Landfill stopped accepting waste on November <br /> 1, 1991. <br /> Recent operations at the landfill were similar to past operations <br /> with some improvements. The solid waste was compacted to a greater <br /> degree using a steel wheel landfill compactor. The daily cover <br /> material was applied carefully to avoid wasting soil. The <br /> operators have added soil cover and graded the top of the landfill <br /> to a minimum of 3% to reduce ponding and to improve drainage on the <br /> top of the landfill. <br /> 3.0 CURRENT MONITORING AND CONTROL SYSTEMS <br /> 3 . 1 Groundwater <br /> The groundwater in the area of the Harney Lane Sanitary Landfill <br /> has a gentle west to southwest gradient. Much of the groundwater <br /> in the eastern part of San Joaquin County is taken from sand and <br /> gravel layers below the Riverbank and Turlock Lake Formations. The <br /> depth to the groundwater table at the site ranges from about 110 to <br /> 130 feet. <br /> The current groundwater monitoring network consists of one <br /> qW upgradient monitoring well (MW-1) and three downradient monitoring <br /> wells (MW-2, MW-3 , MW-4) (see sheet 3 of attached plans) . More <br /> wells may be installed, if necessary, to properly monitor the site <br /> during the postclosure period. Each of the existing wells is <br /> equipped with a dedicated pneumatic displacement pump for sampling <br /> (See section 14 of this report for more detail on the Ground Water <br /> Monitoring System) . The monitoring wells are currently being <br /> sampled quarterly and annually for the parameters listed in the <br /> Waste Discharge Requirements under Ground Water Monitoring which <br /> were issued by the Central Valley Regional Water Quality Control <br /> Board (Appendix A) . <br /> 3 . 2 Security <br /> Unauthorized access by motorcycles and other off-highway vehicles <br /> is controlled by gates and fencing. The entire Harney Lane <br /> Landfill is enclosed by barbed wire fence. The access on Harney <br /> Lane is protected by a locked chain link gate. <br /> 3 . 3 Dust <br /> Dust control at Harney Lane is accomplished by periodically <br /> watering all haul roads using a 3500 gallon water truck. The truck <br /> is filled from a water supply well at the south end of the site <br /> (Hall well, sheet 4) . <br /> 4 <br />