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f <br /> S fEC0R <br /> 7-Eleven Store #19976 <br /> Quarterly Groundwater Monitoring and Remediation Progress Report(2Q2004) <br /> August 20, 2004 <br /> Page 6 <br /> deep segments of well SP-1, it appears that the air flow rates produced during the <br /> extraction on well SP-1 was most likely from the horizontal tank pit well <br /> Based on soil vapor samples collected during the test it is estimated that approximately <br /> 0 10 pound of TPHg was removed in soil vapor during the 22-hour test No recordable <br /> amount of benzene or MtBE was removed during the test Soil vapor extraction system <br /> performance and hydrocarbon removal data are presented in Table 6 Laboratory <br /> analytical results and COC documentation are presented in Attachment B Copies of field <br /> notes taken during the SVE event are include in Attachment C Once the Permit to Operate <br /> (PTO) is obtained from the SJVAPCD, SECOR will extract from select onsite wells during <br /> the third quarter to further evaluate SVE as a feasible remedial alternative at this site <br /> PURGE AND RINSATE WATER DISPOSAL <br /> Water generated during well sampling and equipment cleaning is pumped into a SECOR <br /> truck-mounted water tank The water is transferred into properly labeled 55-gallon drums <br /> and stored on-site The drummed non-hazardous petroleum hydrocarbon contaminated <br /> water is transported quarterly by Belshtre Environmental to Demenno Kerdoon in Compton, <br /> California, for disposal <br /> ATTACHMENTS <br /> Figures <br /> . Tables <br /> Attachment A —Monitoring and Sampling Field Notes <br /> Attachment B —Certified Laboratory Analytical Reports and Cham-of-Custody Documentation <br /> Attachment C —Operations and Maintenance Field Notes <br /> cc Ms Vicki McCartney, San Joaquin County, Environmental Health Department <br /> Mr James Barton, Regional Water Quality Control Board, Central Valley Region <br /> 'e <br /> a <br /> a <br /> to <br /> a� <br /> s <br /> i <br /> 19976 04-2Q Report doc SECOR International Incorporated <br />