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..1 <br /> y City of Stockton A68109.01B <br /> July 18, 1997 Page 5 <br /> 4.3 Laboratory Testing Program: Soil and groundwater samples selected for laboratory <br /> testing were chemically analyzed in the laboratory for the following selected PPCs: benzene, <br /> �. toluene, ethylbenzene, and xylenes (BTEX), methyl tertiary-butyl ether (MTBE), and total <br /> petroleum hydrocarbons - diesel range constituents (TPH-D). Preparation and analytical <br /> methods for the laboratory analyses and corresponding detection limits for reporting <br /> purposes are summarized in Table 1. <br /> TABLE 1 <br /> Preparation and Analytical Methods <br /> Type of Analysis Preparation Method Analytical Method Method Detection limit <br /> Water Sample Analyses <br /> Benzene,Toluene. 50301 6022 0.5µg/L <br /> +... Ethylbenzene, and Xylenes <br /> (13TEX) <br /> Total Petroleum 35101 GC/F1D 50 fig/L <br /> Hydrocarbons-Diesel Range <br /> Constituents(rPH-D) <br /> Methyl Tertiary Butyl Ether 5030 602 5,u-IL <br /> (MTBE) <br /> Soil Sample Analyses <br /> Benzene,Toluene, 5030 80201 0.005 mg/kg <br /> �+ Ethylbenzene,and Xylenes <br /> (BTEX) <br /> Total Petroleum 5030 GC/FID 10 mg/kg <br /> Hydrocarbons-Diesel Range and <br /> Constituents(TPH-D) 1311 <br /> Methyl Tertiary Butyl Ether 5030 8020 0.05 mg/kg <br /> (MTBE) <br /> GC/FID = Gas Chromatography/Flame Ionization Detection <br /> mg/kg = milligrams per kilogram <br /> r,.. pg/L = micrograms per liter <br /> I United States Environmental Protection Agency(U.S.EPA), 1986 <br /> 2 California State Water Resources Control Board, 1988 <br /> i.r <br /> Twining is a California Department of Health Services certified hazardous waste laboratory <br /> (Certificate No. 1371) for the analyses outlined herein. A description of laboratory quality <br /> assurance/quality control procedures used for the analyses are described in the SOPS. <br />