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0 \V 9CVV! <br /> .� A S S O C I A T E S I N C <br /> CONCLUSIONS <br /> Groundwater flow direction and gradient is consistent with previous sampling events. Water <br /> table elevations have increased since the November 2001 monitoring event. Groundwater <br /> analytical results show a general increase in concentrations, though most remained within <br /> historical parameters as set by previous groundwater analytical results. <br /> RECOMMENDATIONS <br /> Based on the results of the second quarter 2002 monitoring event, we recommend continued <br /> quarterly groundwater monitoring with analysis of samples for TPHg, BTEX, and MTBE. <br /> We also recommend implementing a workplan previously submitted to EHD for further <br /> investigation to define lateral and vertical extent of petroleum-impacted soil and water. <br /> Please contact our office at(209) 579-2221 if you have any questions or comments. <br /> Respectfully submitted, <br /> ATC Associates Inc. <br /> • <br /> hn SLel lman <br /> Staff Geologist ;t,, <br /> anne Homsey, P.E. <br /> CA Registered Civil Engineer No. 47410 <br /> cc: Mr. Robert Eggiman � <br /> Marty Hartzell, RWQCB <br /> w:\WoTdpro\92054\92054.01\Rcports\2QR-02.doc 4 <br />