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H <br /> .. _ • ....r-,. •.`-rte '�e.'�,l <br /> bottles will be filled directly from the discharge line of the <br /> bladder pump or from the bailer , and will be filled to the brim. A <br /> Teflon-lined cap (septa) will be placed on the bottles, and the <br /> 'f volatile organic analysis (VOA) bottles will be checked to determine <br /> that no air bubbles remain within. <br /> . All water samples will be labeled and stored as described in the <br /> soil samples section above, and transported to the Eureka laboratory <br /> in Sacramento within 49 hours. <br /> : Soil Boreholes a; <br /> Soil, boreholes will be grouted with bentonite-cement 'slurry or <br /> ildat cement' :from ;the•-bottom .of the borehole,•,to.:ground surface. <br /> Decontamination Procedures <br /> To prevent cross-contamination, soil sampling equipment and all <br /> pumps, bailers, and '-heir related tubing will be washed with <br /> _ laboratory-grade detergent, rinsed with tap water, and rinsed with <br /> deionized water before sampling and development. Downhole drilling <br /> _ equipment and the development pump will be steam-cleaned before and <br /> between use at each borehole. <br /> Quality Assurance Plan <br /> T, The procedures to be followed in sample collection, identifica- <br /> tion, and handling at the ARCO site are described below. The E <br /> analytical quality assurance program is also discussed. <br /> Sample Collection and Handling_ <br /> Proper collection and handling are ,essential to ensure >ttle <br /> 4 quality <br /> of the sample. All samples will be collected by experienced <br /> field personnel. The samples will be collected in suitable <br /> containers which have been precleaned at the laboratory. AlI ' <br /> containers will be c 1par7y marked and dated for identification.. L , <br /> samples will be cooled and stored for analysis no longer than the e <br /> maximum allowable holding time. <br /> Sample Identification and_Chain-of-Custod Procedures � - <br />�� �.. Sample . identification and chain-of-custody pro^edures ensure ; <br /> i .: sample integrity and document sample possession from the time of <br /> ��- -- ----collect-ion--to---its-ultimate-_disposal...__._.Each.--sample contaii:er submitted <br /> for.,ana'..xsis will;. have a label affixed to identify .the job-"number-, ---.__ -.: <br /> sampler, date and time of sample collection, and a sample number ; <br /> unique to that sample. This information, in addition to a descrip- . <br /> 7 tion of the sample, field measurements made, sampling methodology, <br /> names of on-site personnel, and any other pertinentfield observa- <br /> tions, will be recorded on the boring log or in the field records. <br /> - �s <br />