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Emil- <br /> SIERRA <br /> } SURVEYING AND GROUND WATER GRADIENT <br /> 0 The lop of c:-sing elevalions of the site wells were surveyed by Ron 1\Iiller, Licensed t and <br /> Survevor.CL-:#15810 on May 9, 19111. Tile casing elev:-lions were surveyed relative to mean sea <br /> level using USGS Benchmark No.7_-iV%-13•`1 located on the east side of Thornton Road, <br /> Water levels were nu asaare[1 it' the wells rn- h1:ay '). 1971 and the wells were checked for <br /> V�l the presence of free-pltasc hydrocarbons using an MMC llexi-dip interface probe. No tree phase <br /> hydrocarbons were detected i--any of the wells. Willer level data and top of casing elevations;Are <br /> ii,cluciccl in Table 3 tllppcndix 131. 11:c ground water flow direction at the site is to the northeast <br /> at approximately 0.0013 ft/it (1,igure 3, Appendix A), <br /> 5. ANALYTIC RESULTS <br /> The soil and ground water samples were analysed forTPPH(G).TPH[Dl•and FTE7`by FPA <br /> Mrthod 8015 and C:PA Method 5020.respectively. 7'lie soil samples were also analyzed foe Pb by <br /> GI'A Method 7421. All gronnri water samples were analy ed for organic lead by Department Of <br /> HealthServices(DHS1LuftMethod. Aground water sample frownMW-1 was also analyzed forfecal <br /> colilbrin by Standard Methods Method 908C in accordance with San Joaquin County Health <br /> Departrucnt requirements. <br /> _ Lahoratory ana)yscs were perfomacd by Superior A.raalytic :.abor;alory(SAL) of Mart[nc;:. <br /> California. The fecal coliform analysis was perfonned by Pace Laboratory of Novato.California. <br /> Chain of cusiody docaanaents and analytic reports are included in Appendb;E. <br /> 5.1 Analytic Results for Soil <br /> (� Hydrocarbons as gasoline and diesel. BTEX, or Pb were not detected in any of the sol] <br /> samples analyzed from borings;vlW-1•MW-2 and MW-3. Laboratory analytic resu}ls for sot are <br /> shown in•1-able 1 (Appendix 13). <br /> s <br /> Page 7 <br />