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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> /Ma 0A HOUSTON,TEXAS 7054 <br /> � <br /> Certificate of Analysis No. H9-9607852-06 PHONE(713)668-89010 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N ' P.O. # <br /> Renton, WA 98055 G797415, COC#082679 <br /> ATTN: Scott Hooton DATE : 07/29/96 <br /> PROJECT: BP Oil #11193 PROJECT NO: 10-136-6-1 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 07/12/96 <br /> SAMPLE ID: S-6 DATE RECEIVED: 07/18/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 7700 500 P Ag/L <br /> Benzene 70 5 P yg/L <br /> Toluene ND 10 P µg/L <br /> Ethylbenzene ND 10 P µg/L <br /> Total Xylene ND 10 P µg/L <br /> Surrogate $ Recovery <br /> 1, 4-Difluorobenzene 87 <br /> 4-Bromofluorobenzene 87 <br /> METHOD 8020*** 0 <br /> Analyzed by: RL <br /> Date : 07/25/96 <br /> Total Petroleum Hydrocarbons-Gasoline 1 . 1 0 . 5 P mg/L <br /> Surrogate %, Recovery <br /> 1 , 4-Difluorobenzene 107 <br /> 4-Bromofluorobenzene 80 <br /> CA LUFT - Gasoline <br /> Analyzed by: RL <br /> Date : 07/24/96 07 :47 : 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 /> r� <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance. <br /> SPL California License # 1903 <br />