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C'H ROMALAg INC. <br /> � 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. (ug/1) (0a/1) (ug/1) (ug/1) (MCF1l) <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% 95.3-1 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 />' uonq Aic Tam <br /> v <br /> 4ief Chemist Laboratory Director <br /> 2239 Omega Road, #1 - San Ramon, California 94583 <br /> 5101831-1788 Facsimile 510/831-8798 <br /> Federal ID 868-0140157 <br />