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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> J&POS Services Client Project 1D Unocal 6348, 3788 Tracy Blvd ,Tracy Sampled Dec 8, 1993 <br /> 401 Stanwell Dr, Ste 400 Sample Matrix Water Received Dec 8, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Dec 22, 1993 <br /> Attention Avo Avedessian First Sample # 312-0724 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> µg/L 312-0724 312-0725 312-0726 Method <br /> MW-2 MW-3A MW-4 Blank <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D <br /> Benzene 05 N D N D N D <br /> Toluene 05 N D N D N D <br /> Ethyl Benzene 05 N D N D N D <br /> Total Xylenes 06 N D N D N D <br /> Chromatogram Pattern - - -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 1 0 <br /> Date Analyzed 12/18/93 12/18/93 12/20/93 12/18/93 <br /> Instrument Identification HP-4 HP-4 HP-2 HP-4 <br /> Surrogate Recovery, % 103 100 104 105 <br /> (QC Limits r 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 /> SEQUOIA ANALYTICAL <br /> Be <br /> Project M nager <br /> 3120724 MPD <1> <br />