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�a <br /> Date October 27,2003 <br /> Quarter. 3''1 Quarter,2003 <br /> APPENDIX A <br /> FIELD AND LABORATORY PROCEDURES <br /> Sampling Procedures <br /> Sampling equipment is thoroughly cleaned prior to each sample The sampling procedure for each well includes <br /> measuring the water level and checking for the presence of separate-phase hydrocarbons (SPH), using either an <br /> electronic indicator and a clear Teflon® bailer or an oil-water interface probe Wells not containing SPH are purged <br /> of approximately three casing volumes of water (or to dryness) using a submersible pump, centrifugal pump, gas <br /> displacement pump, or bailer The equipment and purging methods used for the current sampling event are noted on <br /> the attached field data sheets During purging,temperature,pH,and electrical conductivity are monitored in order to <br /> document that these parameters are stable prior to collecting samples After purging, water levels are allowed to <br /> partially recover Groundwater samples (both purge and no-purge) are collected using a disposable Teflon® bailer, <br /> placed into appropriate EPA-approved containers, labeled,logged onto sham-of-custody documents, and transported <br /> on ice to a California state-certified laboratory <br /> Laboratory Procedures <br /> The groundwater samples were analyzed for the presence of TPHg (reported as GRO-gasoline range organics) by <br /> using EPA Method 8015B due to capacity issues at the laboratory, benzene, toluene, ethylbenzene, xylenes (total), <br /> fuel oxygenates, 1,2-DCA, and ethanol using EPA Method 8260B The methods of analysis for the groundwater <br /> samples are documented in the certified laboratory analytical report The certified laboratory analytical report, <br /> chain-of-custody documentation,and field data sheets are presented as Appendix B <br /> Purge and Rinsate Water Disposal <br /> i <br /> Water generated during well sampling and equipment cleaning is pumped into a truck-mounted water tank The <br /> water is transported to Atlantic Richfield Company's holding facility in Roseville, California, for temporary storage <br /> The water is then transported by Dillard Environmental Services to Altamont Landfill and Disposal Facility in <br /> Altamont,California for disposal <br /> I <br /> I <br /> I <br /> I <br /> K VWprocessV5 BP ARC01004341Quarter1yl3 QTR 031434 GWMR 3Q03 doc Page A-1 <br />