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Date July 23,2003 <br /> Quarter 20d 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 chain-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, benzene, toluene, ethylbenzene, xylenes (total) <br /> using EPA Methods 801513/8021B due to capacity issues,fuel oxygenates, 1,2-DCA,and ethanol using EPA Method <br /> 8260B The methods of analysis for the groundwater samples are documented in the certified laboratory analytical <br /> report The certified laboratory analytical report, chain-of-custody documentation, and field data sheets are <br /> presented as Appendix B <br /> Purge and Rinsate Water Disposal <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 /> K 1Wpro SAS SP ARC0M434NQuMff1y12 QTR 0M434 GWMR 2Q03 doc Page A-1 <br />