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CH RO MALAB: INC. 5 DAYS TURNAROUND <br /> Analytical Laboratory(E694) <br /> August 19, 1991 ChromaLab File No. : 0891126 <br /> MITTELHAUSER CORPORATION <br /> Attn: Marjorie Bushnell <br /> RE: Four rush water samples for Gasoline/BTEX analysis <br /> Project Name: UNOCAL TRACY <br /> Project Number: 1745-01 <br /> Date Sampled: August 15, 1991 Date Submitted: August 15, 1991 <br /> Date Extracted: August 16, 1991 Date Analyzed: August 16, 1991 <br /> RESULTS: <br /> Ethyl Total <br /> Sample Gasoline Benzene Toluene Benzene Xylenes <br /> I.D. 1 1 1 i 1 <br /> 1745MW1-3 N.D. N.D. N.D. N.D. N.D. <br /> 1745MW2-3 N.D. N.D. N.D. N.D. N.D. <br /> 1645MW3-3 230 35 0. 5 12 14 <br /> 1745MW4-3 N.D. N.D. N.D. N.D. N.D. <br /> BLANK N.D. N.D. N.D. N.D. N.D. <br /> SPIKE RECOVERY 83 . 0% 89.9% 97.3% 93 . 1% 92. 1% <br /> DUP SPIKE REC. 94.9% 86.4% 95.3% 94 . 1% 93 . 8% <br /> DETECTION LIMIT 50 0.5 0. 5 0.5 0. 5 <br /> METHOD OF 5030/ <br /> ANALYSIS 8015 602 602 602 602 <br /> ChromaLab, Inc. <br /> v uong Aic�Tam���� <br /> ief Chemist Laboratory Director <br /> 2239 Omega Road, #1 . San Ramon, California 94583 <br /> 510/831-1788 . Facsimile 510/831-8798 <br /> Federal ID#68-0140157 <br />