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v o <br /> . A S S 0 C I A T E S I N C <br /> dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) utilizing EPA method 8260B <br /> Groundwater well purge and sample logs are contained in Attachment 1 <br /> ANALYTICAL RESULTS <br /> TPHg was detected in samples collected from wells MW-1, MW-2, MW-1P, MW-2P, MW-3P, <br /> and MW-4P MTBE was detected in the samples from wells MW-1, MW-2P, and MW-3P <br /> DIPE was detected in the samples from wells MW-1P, MW-2P, MW-3P, MW-5P, and MW-6P <br /> TBA was detected in the sample from wells MW-2P, MW-3P, and MW-1 1,2-DCA was <br /> detected in samples from MW-1P, MW-3P, MW-5P, and MW-6P A summary of analytical <br /> results is presented in Table 2 Laboratory data sheets and chain-of-custody documentation are <br /> contained in Attachment 2 <br /> RECOMMENDATIONS <br /> Based on the results of the second quarter 2003 monitoring episode, we recommend a third <br /> quarter 2003 monitoring and reporting Groundwater samples should be analyzed for TPHg, <br /> BTEX, and fuel oxygenates including MTBE <br /> • Please contact our office at (209) 579-2221 if you have any questions or comments <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> Mike Luksic, RG # 73 10 <br /> •:rte <br /> Staff Geologist <br /> 7 anne Homsey, P E =v ^` F•-''�' <br /> CA Registered Civil Engineer No 47410 �.,:�•tea tip, <br /> cc Chuck NLller, USA Petroleum Corp <br /> Jim Barton, RWQCB <br /> s\environmental12591214003-StocktonlQuaA]yl2QR-2003 doc 3 <br />