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EC <br /> 16 7-Eleven Store*17647 <br /> Quarterly Groundwater Monitoring Report(2Q2003) <br /> July 28, 2003 <br /> Page 3 <br /> approved containers, labeled, logged onto chain-of-custody documents, and transported on ice to a <br /> California state-certified laboratory Copies of the field notes have been included in Attachment A <br /> GROUNDWATER SAMPLE ANALYSES AND RESULTS <br /> The groundwater samples collected from MW-1 through MW-3 were analyzed for the presence of <br /> TPHg, benzene, toluene, ethyl benzene, and total xylenes (BTEX) and fuel oxygenates MtBE, TBA, <br /> diisopropyl ether (DIPS), ethyl-tert-butyl ether (EtBE), and tert-amyl-methyl ether (TAME) using EPA <br /> Method 8260B The certified laboratory analytical report and chain-of-custody documentation are <br /> presented as Attachment B <br /> a <br /> Groundwater analytical results are presented on Figure 3 and are summarized in Tables 1 and 2 <br /> Chemical concentrations were generally consistent with historical data <br /> PURGE AND RINSATE WATER DISPOSAL <br /> Water generated during well sampling and equipment cleaning is pumped into a SECOR truck- <br /> mounted water tank The water is transferred into properly labeled 55-gallon drums and stored on- <br /> site The drummed non-hazardous petroleum hydrocarbon contaminated water is transported <br /> quarterly by Belshire Environmental to Demenno Kerdoon in Compton, California, for disposal <br /> • ATTACHMENTS <br /> Figures <br /> Tables <br /> Attachment A—Field Notes <br /> Attachment B—Certified Laboratory Analytical Reports and Chain-of-Custody Documentation <br /> cc Mr Harlin Knoll, San Joaquin County Environmental Health Department <br /> i <br /> i <br /> 17647 03-20 Report doc SECOR lntematlonal lncoiporated <br />