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groundwater purged from the wells is temporarily stored in 55-gallon liquid waste drums <br /> approved for this use by the Department of Transportation (DOT). <br /> Hydrochloric acid (or other appropriate chemical) Is added to the sample vials as a <br /> preservative. A sample of the formation water is then collected from the surface of the water <br /> in each of the wells with a cleani <br /> d sposable bailer and slowly transferred to laboratorycleaned <br /> sample containers. . <br /> Water Sample Labeling and Handling <br /> Water samples are preserved in laboratory-cleaned containers which contain appropriate <br /> preservatives. The water samples are sealed with screw caps with Teflon septa to eliminate air . <br /> bubbles.. The sample containers are labeled in the field with the site identification, monitoring <br /> well number and depth, and date, and promptly placed in iced storage for transport to the <br /> laboratory. The technician or geologist initiates Chain of Custody Records in the field that <br /> accompany the samples to a laboratory certified by the State of California for the analyses <br /> requested. Samples are transported to the laboratory promptly. Samples in our custody are <br /> properly,disposed of after their useful life had expired. <br /> Reporting Results of Analyses <br /> Hydrocarbon constituents in groundwater samples are reported by the laboratory in units of <br /> parts per billion (ppb). The maximum contaminant levels listed in Title 22 of the California <br /> Code of Regulations for benzene, ethylbenzene, and total xylene isomers in drinking water are <br /> 1.0, 680, and 1,750 ppb, respectively. The action level established by the California <br /> Department of Health Services for toluene is 100 ppb. To conform with the laboratory <br /> reports, groundwater chemical data are reported,in units of ppb. <br /> w:\95122\o2gwsmlp.doc <br />