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HOUSTON LABORATORY <br /> 8860 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> O PHONE (713)660-090`1 <br /> Certifscate of Analysers No . H9-9607144-08 <br /> Alisto Engineering P 0 # <br /> 1575 Treat Blvd. <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-8 DATE RECEIVED: 07/03/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE ND 10 P ug/L <br /> Benzene ND 0 5 P ug/L <br /> Toluene ND 1 P ug/L <br /> Ethylbenzene ND 1 P pg/L <br /> Total. Xylene ND 1 P ug/L <br /> Surrogate Recovery <br /> 1 , 4-D3fluorobenzene 90 <br /> 4--Bromof luorobenzene 93 <br /> METHOD 8020*** <br /> Analyzed by LJ <br /> Date 07/08/96 <br /> Total Petroleum Hydrocarbons--Gasoline ND 0 05 P mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 87 <br /> 4-Bromofluorobenzene 73 <br /> CA LUFT - Gasoline <br /> Analyzed by. LJ <br /> Date 07/08/96 10 : 53 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 /> in <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance <br /> SPL California License # 1903 <br />