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� i <br /> Report: Groundwater-quality Monitoring—July 30,2003: 7500 West Eleventh Street, Tracy, CA. Page 9 <br /> i <br /> on July 30, 2003, the holding tank was stolen from the site. Under the circumstances, <br /> purge water generated during the July 30, 2003 sampling round was stored on the 7500 <br /> West Eleventh Street property in close-topped, 55- gallon steel drums. <br /> 7 <br /> 2.3 Recovery of Groundwater Samples from Monitoring Wells <br /> i <br /> After purging, samples were recovered from Monitoring Wells MW-3, MW-4, MW-5, <br /> MW-6, MW-9 and MW-11 using a disposable bailer. Water brought to the surface in the <br /> bailer was decanted so as to fill completely the clean glassware supplied by the <br /> laboratory. The sample vials and jars were then tightly closed, labeled for identification, <br /> entered into chain-of-custody control, packed on chemical ice and held in refrigerated <br /> storage until they were transported, within eight hours, to Severn Trent Laboratories' <br /> (STL) laboratory in Pleasanton, California for analysis. <br /> 2.4 Analyses of Groundwater Samples <br /> Each groundwater sample recovered was analyzed at the laboratory for the following <br /> suite of analytes. <br /> Analyte Method of Analysis <br /> Total Petroleum Hydrocarbons EPA Method 8015M <br /> (quantified as Diesel) <br /> Total Petroleum Hydrocarbons EPA Method 8260B <br /> (quantified as Gasoline) <br /> Benzene EPA Method 8260B <br /> Toluene EPA Method 8260B <br /> Ethylbenzene EPA Method 8260B <br /> Total Xylene isomers EPA Method 8260B <br /> tertiary-Butyl alcohol EPA Method 8260B <br /> Methyl-tertiary butyl ether EPA Method 8260B <br /> Di-isopropyl ether EPA Method 8260B <br /> Ethyl tertiary-butyl ether EPA Method 8260B <br /> Tertiary-arnyl methyl ether EPA Method 8260B <br /> 1,2 Dichloroethane EPA Method 8260B <br /> sic <br /> f <br />