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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ertificate of Analysis No. H9-9611911-07 PHONE(713)660-0901 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P.O. # <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-7 DATE RECEIVED: 11/16/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 18000 1000 P Ag/L <br /> Benzene 590 12 P j.g/L <br /> Toluene 25 25 P Ag/L <br /> Ethylbenzene 70 25 P pg/L <br /> Total Xylene ND 25 P Mcg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 107 <br /> 4-Bromofluorobenzene 93 <br /> • METHOD 8020*** <br /> Analyzed by: RL <br /> Date : 11/22/96 <br /> Total Petroleum Hydrocarbons--Gasoline 24 1 . 2 P mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 89 <br /> 4-Bromoflucrobenzene 97 <br /> CA LUFT - Gasoline <br /> Analyzed by: RL <br /> Date :. 11/22/96 07 : 55 : 00 <br /> (P) - Practical Quantitation Limit ND - Not detected. <br /> Notes : *Ret : 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 />