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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 r <br /> {510) 686-9600 • FAX (510) 686-9689 <br /> ux A"ssociates N'" 'Client Project ID ARCO# Og =9 =i,Tracy ` Sampled Jul 3, 1 3 <br /> 1855 Gateway Blvd , Ste 770 Sample Matrix Water Received Jul 23, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Aug 4, 1993 <br /> Attention Paul nSupple First Sample # 307-1061 yxnn v wM wv u <br /> i <br /> .7r } w '` , caro' t. . .,.3 r r4 a . ,,. ,. .TOTAL PURGEAB 4 A` 4 ry + { `+ t ,t v <br /> LE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> ' Reporting Sample <br /> Analyte Limit [.D <br /> µg/L 307-1061 <br /> GW-1 <br /> Purgeable <br /> Hydrocarbons 50 9,900 <br /> Benzene 0 5 1,100 <br />' Toluene 0 5 560 <br /> Ethyl Benzene 05 79 <br />'Total Xylenes 05 1,400 <br />'Chromatogram Pattern Gasoline <br />' <br /> Quality Control Data <br /> Report Llmtt Multiplication Factor 20 <br /> Date Analyzed 8/3/93 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % 118 <br /> (OC Limits = 70-130%) <br />'Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> LEE01.11CONA ANAL. [CAL <br />,Kenneth K F Lee <br /> Laboratory Director <br />' 3071061 ROU <1> <br />