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CONCLUSIONS <br /> 1 6 wells sampled, MW1, MW2, MW3, MW5, MW6, MW7, showed no <br /> detectable levels of contamination <br /> 2 . MW4 indicated very low levels of Total Fuel Hydrocarbons as <br /> gasoline of 093 ppm and Below Detection Limits for Volatile <br /> Aromatic Hydrocarbons, BTEX' s . <br /> 2 . The ground water flow direction is presently in a south, <br /> southeasterly direction <br /> 3 . S1, S2 were not sampled. MW-4 was restored to operable <br /> condition S1 and S-2 were dry <br /> WORK PLAN FOR GROUND WATER MONITOR WELL INSTALLATION <br /> INTRODUCTION <br /> On or about February 4, 1992, Western Geo-Engineers proposes to <br /> drill and install one ground water monitoring well at USA <br /> Petroleum Corporation, Station #65 at 2500 W Lodi Avenue, Lodi, <br /> CA. <br /> The well is to be placed outside the U S .T. field in an effort to <br /> determine whether the shallow ground water aquifer has been <br /> impacted. For purposes of this investigation, Western Geo- <br /> Engineers has researched this site with available ground water <br /> monitoring well data giving ground water flow directions, depths <br /> and pertinent site conditions This information came from the <br /> Problem Assessment Report of this site, report dated December 5, <br /> 1989 and subsequent Quarterly Monitoring Reports by Western Geo- <br /> Engineers from February 1991 through and including the text <br /> earlier presented in this report The historic ground water <br /> gradients presented from monitoring well data at this site are to <br /> the south-southeast . <br /> Monitor Wells Si and S2 are ground water monitoring wells <br /> installed near the tank field; these wells were completed to <br /> approximately 50` The present aquifer depth i s approximately 52 <br /> feet BGS and these wells are dry, further recharge of ground <br /> water at this site may render these wells operable for ground <br /> water testing. To comply with regulatory concerns expressed in <br /> San Joaquin County PHS/EHD letter on September 30, 1992 for an <br /> additional ground water monitoring point be installed in the area <br /> of monitoring wells S1 and S2, which are now dry (Appendix A) , <br /> MW8 is proposed (Figure 7) <br /> 5 <br />