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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 7754, <br /> PHONE(713)660-09 1 <br /> Certificate of Analysis No. H9-9607144-06 <br /> Alisto Engineering <br /> 1575 Treat Blvd P O # <br /> Walnut Creek, CA 94598 G620563 , COC#082676 <br /> ATTN. Brady Nagle DATE 07/12/96 <br /> PROJECT: BP Oil #11194 PROJECT NO: 10-085-9-4 <br /> SITE: Tracy, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 07/01/96 <br /> SAMPLE ID: S-6 DATE RECEIVED: 07/03/96 j <br /> I <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 220 10 P Ag/L <br /> Benzene ND 0 5 P Ag/L <br /> Toluene ND 1 P µg/L <br /> Ethylbenzene ND 1 P Ag/L <br /> Total Xylene ND 1 P µg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 90 <br /> 4-Bromofluorobenzene 93 <br /> METHOD 8020*** <br /> Analyzed by LJ <br /> Date 07/09/96 <br /> Total Petroleum Hydrocarbons-Gasoline 0 . 17 0 05 P mg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 87 <br /> 4--Bromof luorobenzene 73 <br /> CA LUFT - Gasoline <br /> Analyzed by LJ <br /> Date 07/09/96 01 : 44 : 00 <br /> (P) - Practical Quantitation Limit ND - Not detected <br /> Notes *Ref Methods for Chemical Analysis of Water and Wastes, 1983 , EPA <br /> **Ref Standard Methods for Examination of Water & Wastewater, 18th ed <br /> ***Ref - Test Methods for Evaluating Solid Waste, EPA SW846, 3rd Ed <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance . <br /> SPL California License # 1903 <br />