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Date October 29,2003 <br /> Quarter 3d Quarter,2003 <br /> is APPENDIX B <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 If the measured water level in the well <br /> is below the top of screen 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 /> pnor 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 Teflon@ 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 will be decontaminated with a steam cleaner Sensitive equipment <br /> such as the water level sounder are sprayed with a non-phosphate soap and deionized water solution and rinsed with <br /> deionized water All water used for equipment decontarmnation is collected and contained in a truck-mounted water <br /> tank <br /> Laboratory Procedures <br /> The groundwater samples are analyzed for the presence of the following TPHg (reported as GRO-gasoline range <br /> organics)by using EPA Method 8015B due to capacity issues at the laboratory,BTEX,fuel oxygenates and ethanol <br /> by using EPA Method 8260B The methods of analysts for the groundwater samples are documented in the <br /> laboratory analytical report The laboratory analytical report, chain-of-custody documentation, and field data sheets <br /> 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 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 1Wpmcess115 BP ARCMD2093VQi CFW QTR 0312093 GWMR 3Q03 doc Page B-1 <br />