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r <br /> Fourth Quarter 2004 Remediation Status Report <br /> Moore Petroleum Bulk Plant,5491 F Street,Santa,California <br /> Page 5 <br /># Vapor Analysis Performed: <br /> Anal sis Abbreviation Designation USEPA Method No. <br /> Total Petroleum Hydrocarbons TPHgGas-Range 8260B <br /> a <br /> Hydrocarbons <br /> s Gasoline <br /> Benzene Aromatic <br /> ' Toluene gTEX Volatile 82608 <br /> Eth lbenzene prganics <br /> X lenes (Total) <br /> Methyl Tertiary Butyl Ether MTBE <br /> Oxygenate 82608 <br /> Appendix C includes laboratory analytical results for both sampling events. All effluent samples <br /> lry yt <br /> collected during this reporting period were reported as having no concentrations above laboratory <br /> detection limits, As stated above, the SVE system did not operate during the month of October: <br /> Therefore, compliance sampling was not performed for the month of October. j <br /> performance totals: <br /> System perfo . <br /> This Quarter Cumulative <br /> Pounds of TPHg removed: 13 pounds (2 gallons) 5;252 pounds (834 gallons) <br /> Pounds of benzene removed: 0.00 pounds 1.84 pounds <br /> The average SVE system influent TPHg concentration has dropped from 1,400 parts per million <br /> by volume (ppmv) during the first year of SVE operation to 160 ppmv during this year. Most <br /> recently, the SVE system influent TPHg concentration has bordered the detection limit. The <br /> SVE system is still removing 0.4 pounds of TPHg per day. <br /> RECOMMENDATIONS <br /> Apex recommends continued soil vapor extraction because the hydrocarbon concentrations <br /> r <br /> remain sufficiently elevated in the site groundwater. Operation of the ozone sparge system will , <br /> tentatively begin in January 2004. <br /> i <br /> I <br /> j W <br />