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/ SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue - Suite LM - Concord, California 94520 <br /> (510) 686-9600 - FAX (510) 686-9689 <br /> MPDS Services, Inc Client Project ID Unocal#6981,4707 Pacific Ave Stockton Sampled Jan 17-18, 1994 <br /> 2401 Stanweil Dr, Ste 400 Sample Matrix Water <br /> Concord, CA 94520Analysis Method EPA 5030 8015 8020 Received Jan 19, 1994 <br /> Attention Avo Avedissian First Sample# 401-0946 / / Reported Jan 31, 1994 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID ID ID <br /> ID <br /> Mg/L 401-0946 401-0947 401-0948 401-0949 401-0950 401-0951 <br /> MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 <br /> Purgeable <br /> Hydrocarbons 50 15,000 620 280 250 340 <br /> 420 <br /> Benzene 0 5 4,800 3 9 49 4 2 71 <br /> 88 <br /> Toluene 0 5 460 2 7 15 3 0 4 7 <br /> 55 <br /> Ethyl Benzene 0 5 290 11 91 12 <br /> 19 24 <br /> Total Xylenes 0 5 620 48 45 53 84 <br /> 100 <br /> Chromatogram Pattern Gasoline Gasolme Gasoline Gasoline Gasoline <br /> Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 100 4 0 1 0 <br /> 10 10 10 <br /> Date Analyzed 1/27/94 1/27/94 1/26/94 1/26/94 1/26/94 1/26/94 <br /> Instrument Identification HP-2 HP-2 HP-4 HP-2 <br /> HP-2 HP-2 <br /> Surrogate Recovery, % 112 112 89 <br /> (OC Limits = 70-130%) 99 101 109 <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting iimit <br /> SEQUOIA ANALYTICAL <br /> 41- nB4emProlecer <br /> 4010940 MPO <2> <br />