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City of Stockton A68108.01B <br /> i-' July 18, 1997 Page S <br /> .. samples were handled and transported consistent with Twining's SOPS. <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 - gasoline range constituents (TPH-G). Selected soil samples were <br /> �- also tested for total organic (TOC) matter at the request of the SJCPHS. Preparation and <br /> analytical methods for the laboratory analyses and corresponding detection limits for <br /> reporting purposes are summarized in Table 1. <br /> .....TABLE4. <br /> �-- Preparation and Analytical Methods <br /> Type of Analysis Preparation Method Analytical Method Method Detection limits <br /> Water Sample Analyses <br /> Benzene,Toluene, 50301 6022 0.5µg/L <br /> Ethylbenzene,and Xylenes <br /> (BTEX) <br /> Total Petroleum 35101 GC/FID 50µg/L <br /> Hydrocarbons-Gasoline Range <br /> Constituents(TPH-G) <br /> w <br /> Methyl Tertiary Butyl Ether 5030 602 5µg/L <br /> (MTBE) <br /> Soil Sample Analyses <br /> Benzene,Toluene, 5030 80201 0.005 mg/kg <br /> Ethylbenzene,and Xylenes <br /> a-. (BTEX) <br /> Total Petroleum 5030 GC/FID 10 mg/kg I <br /> Hydrocarbons-Gasoline Range and <br /> Constituents(TPH-G) 1311 <br /> Methyl Tertiary Butyl Ether 5030 8020 0.05 mg/kg } <br /> ('MTBE <br /> Organic Matter(TOC) Walkely-Black Walkely-Black 5 mg/kg <br /> i <br /> GC/FID = Gas Chromatography/Flame Ionization Detection i <br /> mg/kg = milligrams per kilogram <br /> 4.+ ug/L = micrograms per liter <br /> 1 United States Environmental Protection Agency(U.S.EPA), 1986 <br /> 2 California State Water Resources Control Board,19M <br /> rs, 3 U.S.EPA,1982 <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 /> s <br /> �.r <br />