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• A S S O 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-lP, MW-2P, and MW- <br /> 3P BTEX constituents were detected in samples collected from wells MW-2P, MW-1, and MW- <br /> 2 MTBE was detected in the samples from wells MW-1, MW-2P, and MW-3P DIPE was <br /> detected in the samples from wells MW-1P, MW-2P, MW-3P, MW-5P, and MW-6P TBA was <br /> detected in the sample from well MW-2P 1,2-DCA was detected in samples from MW-1P, MW- <br /> 3P, MW-5P, and MW-6P A summary of analytical results is presented in Table 2 Laboratory <br /> data sheets and cham-of custody documentation are contained in Attachment 2 <br /> RECOMMENDATIONS <br /> Based on the results of the fourth quarter 2003 monitoring episode, we recommend a first quarter <br /> 2004 monitoring and reporting event 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 /> Jim Kundert1* .;. <br /> Staff Geologist HOW'er ` <br /> LIVIlV1 <br /> tip <br /> Jeanne Homsey, P E � <br /> CA Registered Civil Engineer No 47410 <br /> cc Chuck Miller, USA Petroleum Corp <br /> Jim Barton, RWQCB <br /> s lenvironmenta112591210003-stocktonlQuanlyl4QR-2003 doc 3 <br />