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Mr Craig Mitchell, SJVAPCD July 14, 2005 <br /> Source Test Report Project No U6100-16-9 <br /> ARCO Station No 6I00, Tracy, CA <br /> Page 2 <br /> enclosure, and other pertinent site features A process flow diagram for the SVE system <br /> is illustrated in Figure 3 <br /> During system start-up, the following parameters were monitored and recorded on field <br /> data sheets <br /> • Influent flow rate (before dilution) and system influent flow rate (after dilution), <br /> • Applied vacuum on the vapor extraction wells, <br /> • Influent temperature, system influent temperature, and system operating <br /> temperature, and <br /> 0 Photo-ionization detector (PID) measurements for organic vapors from the <br /> extraction wells <br /> Influent and effluent samples were collected on May 16, 2005, in the presence of <br /> SJVAPCD personnel Samples were collected in one-liter tedlar bags from the sample <br /> ports (see Figure 3) using a tedlar bag vacuum chamber and an air sampling pump <br /> Samples were forwarded to Sequoia Analytical, a state certified laboratory (ELAP <br /> 42374), and were analyzed for gasoline range organics (GRO) using United States <br /> Environmental Protection Agency (USEPA) Method 8015B, and for benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX compounds), and methyl tertiary butyl ether <br /> (MTBE) using USEPA Method 8260B Analytical results and chain of custody <br /> documentation are included in Appendix A All field measurements were recorded on <br /> field data sheets, which are included in Appendix B <br /> Analytical results of the soil vapor samples collected on May 16, 2005, were used to <br /> calculate petroleum hydrocarbon mass extraction rates, mass emission rates, and <br /> destruction efficiencies Table 1 presents a summary of the system operating parameters, <br /> analytical results, and destruction efficiencies Detailed calculations are presented in <br /> Appendix C <br /> Based on the flow rates measured and analytical results for air samples collected on May <br /> 16, 2005, the GRO, benzene, and MTBE mass emission rates for the SVE system were <br /> estimated to be less than 1 37 pounds per day (lbs/day), less than 0 01 lbs/day, and less <br /> than 0 01 lbs/day, respectively The destruction efficiency of the SVE system for GRO <br /> was estimated to be greater than 99% The results of the source test demonstrate <br /> compliance with the conditions listed in the ATC <br /> K 1$p-Arco for URS16 i MReportslARCO 6100 Source Test Report-500 cfm doc <br />