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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> Q HOUSTON TEXAS 770Ft4 <br /> Z'W PHONE (713)660-0901 <br /> Certificate of Analysis No. H9-9607144-04 0 <br /> Ali.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: Alisto Engineering DATE SAMPLED: 07/01/96 <br /> SAMPLE ID: S-4 DATE RECEIVED: 07/03/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE ND 100 P ug/L <br /> Benzene 1.60 5 P µg/L <br /> Toluene 49 10 P jcg/L <br /> Ethylbenzene 590 10 P µg/L <br /> Total Xylene 836 10 P j,g/L <br /> Surrogate % Recovery <br /> 1 , 4-Difluorobenzene 97 <br /> 4-Bromofluorobenzene 87 <br /> METHOD 8020*** <br /> Analyzed by. LJ <br /> Date : 07/09/96 <br /> Total Petroleum Hydrocarbons-Gasoline 11 0 5 P mg/L <br /> Surrogate % Recovery <br /> 1 , 4--Dzfluorobenzene 77 <br /> 4-Bromofluorobenzene 63 <br /> CA LUFT - Gasoline <br /> Analyzed by LJ <br /> Date. 07/09/96 12 47 00 <br /> ND - Not detected (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 />