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i <br /> i <br /> isopropyl ether (DIPE), tertiary butyl alcohol (TBA), tertiary amyl ether (TAME), 1,2- <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-2P, and MW-3P BTEX <br /> constituents were detected in samples collected from wells MW-1 and MW-2P MTBE was <br /> detected in the samples from wells MW-1, MW-2P, and MW-3P DIPE was detected in the <br /> samples from wells MW-1P, MW-2P, MW-3P, MW-5P, and MW-6P TBA was detected in the <br /> sample from well MW-2P 1,2-DCA was detected in samples from MW-1P, MW-3P, MW-5P, <br /> and MW-6P <br /> A summary of analytical results is presented in Table 2 Laboratory data sheets and chain-of- <br /> custody documentation are contained in Attachment 2 <br /> ADDITIONAL ACTIVITIES <br /> At the request of Mr Harlin Knoll of San Joaquin County Environmental Health Department, the <br /> well casings for monitoring wells MW-1 and MW-4P were modified to prevent intrusion from <br /> surface water On February 10, 2004, a geologist from ATC extended the casing from each well <br /> by approximately 3 feet The extension was held in place by a coupling and additional grout was <br /> placed in the borehole <br /> RECOMMENDATIONS <br /> Based on the results of the second quarter 2004 monitoring episode, we recommend a third <br /> quarter 2004 monitoring and reporting event Groundwater samples should be analyzed for <br /> TPHg, BTEX, and fuel oxygenates including MTBE <br /> s Ienvironmental12591210003 Stockto&Quartlyl2QR-2004 doc 3 <br />