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Date October 29,2003 <br /> Quarter 3`d 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 that do not <br /> qualify as non-purge wells are purged of approximately three casing volumes of water (or to dryness) using a <br /> submersible pump, centrifugal pump, gas displacement pump, or bailer The equipment and purging methods used <br /> for the current sampling event are noted on the attached field data sheets During purging, temperature, pH, <br /> electrical conductivity, and dissolved oxygen are monitored in order to document that these parameters are stable <br /> prior to collecting samples After purging, water levels are allowed to partially recover Groundwater samples are <br /> collected using a clean disposable Teflon'bailer,placed into appropriate EPA-approved containers, labeled,logged <br /> onto cham-of-custody documents,and transported on ice to a California state-certified laboratory <br /> Decontamination Procedures <br /> Prior to sampling each well,reels and pumps will be decontaminated with a steam cleaner Sensitive equipment such <br /> as the water level sounder are sprayed with a non-phosphate soap and deronized water solution and rinsed with <br /> deronized water All water used for equipment decontamination is collected and contained in a truck-mounted water <br /> tank <br /> iLaboratory Procedures <br /> The groundwater samples are analyzed for the presence of the following Total petroleum hydrocarbons as gasoline <br /> (TPHg) using EPA Method 8015B due to capacity issues at the laboratory, benzene, toluene, ethylbenzene, and <br /> xylenes (total) (BTEX), fuel oxygenates, 1,2-dichloroethane (1,2-DCA), and ethanol are analyzed using EPA <br /> Method 8260B The methods of analysis for the groundwater samples are documented in the laboratory analytical <br /> report The laboratory analytical report, chain-of-custody documentation, and field data sheets are presented as <br /> 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 the Blaine Tech Services holding facility in Roseville, California or in the ARCO holding <br /> facility in West Sacramento, California for temporary storage Dillard Environmental Services then transports the <br /> water to the Altamont Landfill and Resource Recovery Facility in Altamont,California for disposal <br /> K\WPno es\15 Bp ARcu\0WBO\QoancTW QTR 03\6080 GWMR 3Q03 doc Page A-1 <br />