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Report:Groundwater-quality Monitoring—January 26,2004: 7500 West Eleventh Street, Tracy, CA. Page 8 <br /> - 2.2.1 Disposal of Pur e_Water <br /> During earlier sampling rounds, purge water held temporarily in the 55-gallon drum used <br /> ` to manage it at the well locations was pumped into a 1,000-gal- storage tank located on <br /> the 7500 West Eleventh Street property. It was planned to ship that water to a permitted <br /> recycling facility for disposal when sufficient quantity had accumulated for that to be <br />{ done economically following future rounds of groundwater sampling and analysis. <br /> However, some time between the round of groundwater-quality monitoring conducted on <br /> the site on April 15, 2003 and the round that was conducted on July 30, 2003, the holding <br /> ' tank was stolen from the site. Under the circumstances, purge water generated during the <br /> January 26, 2004 sampling round was temporarily stored on the 7500 West Eleventh <br /> Street property in 55-gallon steel drums. A new holding tank was delivered to the site in <br /> February 2004. The purge water stored in the 55-gallon drum during the January 2004 <br /> sampling round has since been transferred to the holding tank. <br /> 2.3 Recovery of Groundwater Samples from Monitoring Wells <br /> After purging, samples were recovered from Monitoring Wells MW-3, MW-4, MW-5, <br /> MW-6, MW-7, MW-10 and MW-11 using a disposable bailer. Water brought to the <br /> « surface in the bailer was decanted so as to fill completely the clean glassware supplied by <br /> the laboratory. The sample vials and jars were then tightly closed, labeled for <br /> identification, entered into chain-of-custody control, packed on chemical ice and held in <br /> _ refrigerated storage until they were transported, within eight hours, to Severn Trent <br /> Laboratories' (STL) laboratory in Pleasanton, California for analysis. <br /> 2.4 Analyses of Groundwater Samples <br /> Eachoundwater analyzed at the laboratory for the following <br /> ln" sample p recovered was � <br /> suite of analytes. <br /> An_ aI34 Method of Anal <br /> Total Petroleum Hydrocarbons EPA Method 8015M <br /> (quantified as Diesel) with silica gel cleanup <br /> ,• Total Petroleum Hydrocarbons EPA Method 8260B <br /> (quantified as Gasoline) <br /> Benzene EPA Method 8260B <br /> Toluene EPA Method 8260B <br /> Ethyl benzene EPA Method 8260B <br /> Total Xylene Isomers EPA Method 8260B <br /> {: <br /> sic <br />