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Report: Groundwater-quality Monitoring-November 28,2000: 7500 West Eleventh Street, Tracy, CA. Page 8 <br /> 2.3 Recovery of Groundwater Samples from Monitoring Wells <br /> After purging, samples were recovered from each monitoring well using either a <br /> dedicated bailer that was left suspended in the well casing for future use or a disposable <br /> bailer. Water brought to the surface in the bailer was decanted so as to completely fill <br /> clean glassware supplied by the laboratory. The sample vials and jars were then tightly <br /> closed, labeled for identification, entered into chain-of-custody control, packed on <br /> chemical ice and held in refrigerated storage until they were transported to Chromalab, <br /> Inc.'s (Chromalab) laboratory in Pleasanton, California for analysis. <br /> ' 2.4 Analyses of Groundwater Samples <br /> Each groundwater water sample was analyze_d at the laboratory for the following suite of <br /> analytes, <br /> Analyte Method of Analysis, <br /> Total Petroleum Hydrocarbons EPA Method 5030/8015M <br /> (quantified:as Diesel) <br /> Total Petroleum Hydrocarbons EPA Method 8020A/8015M <br /> (quantified_ as Gasoline) <br /> Benzene EPA Method 8020 <br /> Toluene EPA Method 8020 <br /> Ethyl benzene EPA Method 8020 <br /> Total Xylene Isomers EPA Method 8020 <br /> Fuel Oxygenates* EPA Method 8260A <br /> ( * Samples from monitoring wells MW-1, MW-2 and MW-7 were analyzed for the fuel <br /> i oxygenates tertiary-Butyl alcohol (TBA), Methyl-tertiary butyl ether (MTBE), Di- <br /> isopropyl ether (DIPE), Ethyl tertiary-butyl ether (ETBE), and tertiary-Amyl methyl <br /> ether (TAME). Due to a laboratory error, fuel-oxygenate analyses of the groundwater <br /> samples from monitoring wells MW-3, MW-4, MW-5 and MW-6 were performed for <br /> MTBE only. <br /> Chromalab is certified to perform the specified analyses by the California Department of <br /> Health Services (DHS). <br /> Y <br /> sic <br />