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SEQUOIA ANALYTICAL <br />{ 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX(510) 686-9689 <br /> DS Services Client Project 1D. Unocal 0788,8203sS <br /> Eat 11th treet,Tracy Sampled: Nov 30, 1993::;' <br /> U401 Stanwell Dr., Ste. 400 Sample Matrix: Water Received: Dec 1, 1993< <br /> i Concord, CA 94520 Analysis Method: EPA 5030/8015/8020 Reported: Dec 16, 1993i> <br /> ; p <br /> Attention: Avo Avedessian First Sample #: 312-0109 <br /> I TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> i Reporting Sample Sample Sample Sample Sample Sample <br /> I Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. <br /> ug/L 312-0109 312-0110 312-0111 312-0112 312-0113 312-0114 <br /> t U-1 U-2- U-3 U-4 U-5 U-6 <br /> i <br /> Purgeable <br /> Hydrocarbons 50 N.D. N.D. N.D. N.D. N.D. 120 <br /> Benzene 0.5 N.D. N.D. N.D. N.D. N.D. 4.1 <br /> Toluene 0.5 N.D. N.D. N.D. N.D. N.D. 1.6 <br />'I <br /> Ethyl Benzene 0.5 N.D. N.D. N.D. N.D. N.D. 3.1 <br /> i <br /> Total Xylenes 0.5 N.D. N.D. N.D. N.D. N.D. 1.9 <br /> I <br /> i Chromatogram Pattern: Gasoline <br /> i <br /> Quality Control Data <br /> Report Limit Multiplication Factor: 1.0 1.0 1.0 1.0 1.0 1.0 <br /> Date Analyzed: 12/10/93 12/10/93 12/10/93 12/10/93 12/10/93 12/10/93 <br /> Instrument Identification: ML#2 ML#2 ML#2 ML#2 ML#2 ML#2 <br /> j <br /> Surrogate Recovery, %: 86 79 82 83 79 83 <br /> (QC 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 /> SEQUOIA ANALYTICAL <br /> I <br /> Al p <br /> P 'ect Manager <br /> 3120109.MPD <1> <br /> i <br /> i <br />