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r►r� ACL.LL . --J L • <br /> 0 <br /> 1 SITE CIURACTERISTICS <br /> rs landfill is located in San Joaquin County at 3242 South El Dorado Street <br /> Cove Contracto <br /> the site is in <br /> on Plate 1.1). According to the Mount Diablo Base.�N Meridian, <br /> 6 East. <br /> in Stockton ( Township <br /> the eastern half of the southeast quarter of Section 23, <br /> OF SITE, GROUND WATER, AND SURFACE WATER <br /> 1.1 REI-ATI®NS <br /> roximately 580 feet long in the north-south direction <br /> The Cove Contractors landfill is app <br /> he <br /> east-west direction. The bottom elevation of waste at to sea levtet <br /> ll <br /> and 700 feet wide in the roximately 20 feet below mea <br /> is variable with an apparent maximum depth of app ranges from natural grade <br /> + 16 feet, msl] to <br /> -20 feet, msl)• The top elevation of the landfill is variable is notand <br /> C PP d• <br /> ( approximately -9 feet, mst. The landfill <br /> [ <br /> arallels the south side of the landfill and is appy®ximately 40 <br /> Duck Creek/Walker Stough P ears to be <br /> feet from the landfill perimeter. The bottom of Duck Creek/ <br /> Walker Slough app <br /> ed on visual observations• <br /> approximately 20 feet below natural grade, or •5 feet, msl, basManagement Agent <br /> Flood Insurance Rate Maps published by the Federal Emergency <br /> g <br /> indicate that the Cove Contractors landfill is located `"'ith�e flood.Zone B• the <br /> (FEMA , 1983) on levees from the b <br /> 100-Year fl000d plain, defined as land areas protected by <br /> �A small, intermittent, onsite and is located on the north side of the landfill. This pond is <br /> . p be at or near the <br /> topographically low with respect to the landfill and the P and bottom may <br /> bottom of the waste. <br /> Zone III, discussed in Section <br /> The ground water in the uppermost water bearing unit ( 1988 Portions of <br /> 1.3.2) was at an elevation of approximately -17 feet, msl during August, <br /> a ear to have been excavated to below the potentiometric waste material e(re es <br /> the landfill floor pp The boring log from MW-3 indicates was <br /> to plate 1.19, Zone II Isopach)• water in the onsite <br /> present below the potentiometric surface. Based on orate nellll tions, <br /> pond appears to represent the potentiometric surface in o <br /> information for MW-5 and MW plate <br /> located between the land6lwai d <br /> Based on hydraulic inform the uppermost <br /> er <br /> Duck Creek/Walker Slough (refer to Cross Section, Plate 1.16), <br /> 1-1 <br /> COVE-1 <br />