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HOUSTON LABORATORY <br /> 6880 INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77054 <br /> ertificate of Analysis No. H9-9611911-06 PHONE(713)660.0901 <br /> BP Oil Company P O. # <br /> 295 SW 41st St, Bldg 13 , Ste N <br /> Renton, WA 98055 G797415 COC#084393 <br /> ATTN: Scott Hooton DATE : 11/25/96 <br /> PROJECT: BP Oil #11193 PROJECT NO: 10-136-6-2 <br /> SITE: Stocton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 11/14/96 <br /> SAMPLE ID: S-6 DATE RECEIVED: 11/16/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 88000 2500 P Ag/L <br /> Benzene 350 12 P µg/L <br /> Toluene ND 25 P µg/L <br /> Ethylbenzene ND 25 P µg/L <br /> Total Xylene ND 25 P µg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 104 <br /> 4-Bromofluorobenzene 96 <br /> METHOD 8020*** <br /> Analyzed by: AA <br /> Date : 11/25/96 <br /> Total Petroleum Hydrocarbons-Gasoline 40 1 .2 P mg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 93 <br /> 4-Bromofluorobenzene 100 <br /> CA LUFT - Gasoline <br /> Analyzed by: RL <br /> Date : 11/22/96 08 : 52 : 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 />