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ATG Associates Inc. <br /> "'. 1117 Lone Palm Avenue,Suite B <br /> V Modesto,California 1 <br /> 209-579-222-2221 <br /> Fax:209-579-2225 <br /> Two influent vapor samples will be collected from the vapor well for laboratory analysis utilizing <br /> EPA Method T014 to determine TPHg, BTEX MTBE, ETBE, DIPS, TBA, TAME, 1,2-DCA, and <br /> EDB concentrations. One vapor sample will be collected at the beginning of the test and one vapor <br /> sample will be collected at the end of the test. Also, an effluent vapor sample will be collected to <br /> determine removal efficiency of the activated carbon. <br /> Long Term Vapor Extraction Test <br /> After the short term VETS are completed, one long term VET will be performed on the vapor well <br /> exhibiting the highest petroleum hydrocarbon impact during drilling activities, and the test will last <br /> six to eight hours. This test will be performed to collect additional data to assist in determining the <br /> effective radius of influence, and to determine the petroleum hydrocarbon concentrations extracted <br /> from this well. The same parameters will be monitored as in the short tetra VETs. <br /> Two influent vapor samples will be collected from the vapor well for laboratory analysis TPHg, <br /> BTEX MTBE, ETBE, DIPE, TBA, TAME, 1,2-DCA, and EDB utilizing EPA Method TO14. One <br /> vapor sample will be collected at the beginning of the test and one vapor sample will be collected at <br /> the end of the test. Also, an effluent vapor sample will be collected to determine the removal <br /> efficiency of the activated carbon. <br /> Summary Report Preparation <br /> i <br /> Upon completion of the drilling activities and pilot testing, a comprehensive report will be prepared <br /> to summarize field activities and evaluate results. The summary report will include a site map and <br /> analytical data presented in tabular form. A radius of influence for vapor extraction will be <br /> presented based on the information obtained during the pilot test. The summary report will be <br /> prepared in accordance with California Regional Water Quality Control Board and SJCEHD <br /> reporting guidelines. <br /> I <br /> Jamar service Station 6 <br />