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Report: Groundwater-quality Monitoring-December 20-21,2005, 7500 West Eleventh Street, Tracy, CA. Page 12 <br /> � will be recycled into beneficial use before the cleaned water is discharged. <br /> 2.3 Recovery of Groundwater Samples from Monitoring Wells <br /> After purging, samples were recovered using disposable bailers. Water brought to the <br /> surface in the bailers was decanted via discharge spigot valves placed in the bottom of <br /> each bailer so as to completely fill clean glassware supplied by the laboratory containing, <br /> w where applicable, pre-dispensed preservatives. The sample vials were then tightly closed, <br /> labeled for identification, entered into chain-of custody control and packed on chemical <br /> ice for transport, within 24 hours, to Severn Trent Laboratories' (STL) laboratory in <br /> Pleasanton, California for analysis. <br /> Note: Although it was planned to purge and recover a sample from Monitoring <br /> Well MW-16 during the December 2005 monitoring round, that was not done <br /> because it was clear to the sampling team that water in that well was heavily <br /> contaminated by sewage and it was judged to be a significant biohazard. <br /> 2,4 Analyses of Groundwater Samples <br /> y 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) with silica gel cleanup <br /> Total Petroleum Hydrocarbons EPA Method 8260B <br /> (quantified as Gasoline) <br /> Benzene EPA Method 8260B <br /> 4 <br /> Toluene EPA Method 8260B <br /> Ethyl benzene 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 /> �. <br /> Ethyl tertiary-butyl ether EPA Method 8260B <br /> 3 <br /> sic <br />