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SECOR vvvvvvsecor corn <br /> INTERNATIONAL. 3017 Kilgore Road Suite 100 <br /> c ® R INCORPORATED Rancho Cordova CA 95670 <br /> 916 861 0400 TEL <br /> 916 861 0430 FAX <br /> July 30, 2003 ����� �� 1 1 0 <br /> J U L 3 1 2003 <br /> Ms Lori Duncan ENVIRONMENT HEALTH <br /> San Joaquin County Environmental Health Department PERMIT/SERVICES <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> RE Second Quarter 2003 Groundwater Monitoring Report <br /> Chevron Service Station 9-4275 <br /> 2905 Benjamin Holt Drive <br /> Stockton, California <br /> SECOR Project No 77CH 94275 04 0670 <br /> and <br /> Arco Service Station 5-2133 <br /> 2908 Benjamin Holt Drive <br /> Stockton, California <br /> SECOR Project No 77BP 52133 03 0336 <br /> Dear Ms Duncan <br /> SECOR international Incorporated (SECOR) Is providing this report to summarize the second <br /> quarter 2003 groundwater monitoring event at the above referenced sites <br /> . COMPLETED ACTIVITIES— Second Quarter 2003 <br /> • Performed coordinated quarterly groundwater monitoring and sampling, <br /> • Prepared and submitted quarterly groundwater monitoring report, <br /> • Operated and maintained air sparge (AS) systems (CHEVRON and ARCO), <br /> PLANNED ACTIVITIES —Third Quarter 2003 <br /> • Perform coordinated quarterly groundwater monitoring and sampling, <br /> • Prepare and submit quarterly groundwater monitoring report, <br /> • Operate and maintain AS system (CHEVRON and ARCO), <br /> DISCUSSION (CHEVRON) <br /> Nine Chevron wells were sampled on June 17, 2003 by Gettler Ryan, Inc (G-R), In conjunction with <br /> groundwater monitoring at the adjacent ARCO service station 2113 Groundwater samples were <br /> analyzed for TPHg, BTEX, and the fuel oxygenates MtBE, ethyl-tertiary-butyl-ether (EtBE), di- <br /> isopropyl ether (131PE), tertiary-amyl-methyl-ether (TAME), tertiary-butyl-alcohol (TBA), 1,2 <br /> dlchloroethane (1,2 DCA) and 1,2 dibromoethane (EDB) TBA, DIPE, ETBE, 1,2-DCA, and EDB <br /> were not detected in samples from any of the wells A summary of laboratory data is listed below <br /> 1 1Chevron1942751Penodic Mon itonngNOMR\2003\2Q03 revised QMR Chev and Arcot doc <br />