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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> 0 HOUSTON TEXAS 77054 <br /> PHONE(713)660 0901 <br />. Certificate of Analysis No. H9-9607144-03 <br /> Al>_sto 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: Allsto Engineering DATE SAMPLED: 07/01/96 <br /> SAMPLE ID: S-3 DATE RECEIVED: 07/03/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 11 10 P Ag/L <br /> Benzene 35 0 5 P ug/L <br /> Toluene 5 1 P j.g/L <br /> Ethylbenzene 30 1 P µg/L <br /> Total Xylene 13 1 P µg/L <br /> Surrogate Recovery <br /> 1, 4-Dlfluorobenzene 90 <br /> 4-Bromofluorobenzene 90 <br /> METHOD 8020*** <br /> Analyzed by LJ <br /> Date 07/09/96 <br /> Total Petroleum Hydrocarbons-Gasoline 0 . 58 0 . 05 P mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 77 <br /> 4-Bromofluorobenzene 67 <br /> CA LUFT - Gasoline <br /> Analyzed by LJ <br /> Date . 07/09/96 12 19 00 <br /> (P) - Practical Quantitation Limit <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 />