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Date: January 21,2003 <br /> Quarter 4`s Quarter,2002 <br /> • APPENDIX B <br /> SAMPLING AND ANALYSIS 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 If the measured water level in the well <br /> is below the top of casing elevation,the well may be sampled without purging For non-purge wells,one set of water <br /> quality parameters are collected and the well is sampled with a disposable bailer Wells not containing SPH that do <br /> not 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(both <br /> purge and no-purge) are collected using a clean disposable Teflon0 bailer, placed into appropriate EPA-approved <br /> containers, labeled, logged onto chain-of-custody documents, and transported on ice to a California state-certified <br /> laboratory <br /> Decontamination Procedures <br /> Prior to sampling each well, reels and pumps are decontaminated with a steam cleaner Sensitive equipment such as <br /> • the water level sounder are sprayed with ation-phosphate soap and delonized water solution and rinsed with <br /> deionized water All water used for equipment decontamination is collected and contained in a truck-mounted water <br /> tank <br /> Laboratory Procedures <br /> The groundwater samples are analyzed for the presence of TPHg, BTEX, and MtBE using EPA Methods 8015 <br /> (modified) and 8021 The methods of analysis for the groundwater samples are documented in the laboratory <br /> analytical report The field data sheets are presented as Appendix A, and laboratory analytical report and chain-of- <br /> custody <br /> hain-ofcustody documentation are presented as Appendix C <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 West Sacramento, California, for temporary <br /> storage The water is then transported by Dillard Environmental to the Altamont Landfill and Resource Recovery <br /> Facility in Altamont,California for disposal <br /> K V5 SP ARC011 t 1911Q..mrIM QTR 02/11191 QMR4Q02 do Page B-1 <br />