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' Date- September 29,2003 <br /> Report Assessment 2003 <br /> event are noted on the attached field data sheets During purging,temperature,pH,electrical conductivity,and dissolved <br /> oxygen are monitored in order to document that these parameters are stable prior to collecting samples After purging, <br /> water levels are allowed to partially recover Groundwater samples(both purge and no-purge)are collected using a clean <br /> disposable Teflon® bailer, placed into appropriate EPA-approved containers, labeled, logged onto chain-of-custody <br /> documents,and transported on ice to a California state-certified laboratory <br /> Groundwater Sampling Decontamination Procedures <br /> Prior to sampling each well,reels and pumps were decontaminated with a steam cleaner Sensitive equipment such as the <br /> P g <br /> water level sounder are sprayed with a non-phosphate soap and detonized water solution and rinsed with deionized water <br /> All water used for equipment decontamination is collected and contained in a truck-mounted water <br /> Groundwater Sample Laboratory Procedures <br /> Groundwater samples are analyzed for the presence of TPHg, benzene, toluene, ethylbenzene, xylenes (total), fuel <br /> oxygenates, and lead scavengers using EPA Method 8260 The methods of analysis for the groundwater samples are <br /> documented in the certified laboratory analytical report <br /> Purge and Rinsate Water Disposal <br /> Water generated during well sampling and equipment cleaning is pumped into a truck-mounted water tank The water is <br /> transported to Blaine Tech's holding facility in Sacramento, California, for temporary storage The water is then <br /> transported by Dillard Environmental Services to Altamont Landfill and Resource Recovery Facility to Altamont, <br /> California for disposal <br /> K\WprocessU5 BP ARCO\06020%2003 Assessment16020 Assessment&SCM 2003 doc Page D-2 <br />