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i <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77054 <br /> ertificate of Analysis No. H9-9705C92-02 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#077267 <br /> ATTN: Scott Hooton DATE: 06/04/97 <br /> PROJECT: BP Oil ##11193 PROJECT NO: 10-136-6-4 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 05/22/97 <br /> SAMPLE ID: S-2 DATE RECEIVED: 05/24/97 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 260 10 P µg/L <br /> Benzene ND 0 . 5 P µg/L <br /> Toluene ND 1 . 0 P jg/L <br /> Ethylbenzene ND 1 . 0 P tLg/L <br /> Total Xylene ND 1 . 0 P j.g/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 90 <br /> Method 8020A*** <br /> Analyzed by: DAO <br /> Date : 06/01/97 <br /> Total Petroleum Hydrocarbons-Gasoline 0 . 28 0 . 05 P mg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 93 <br /> 4-Bromofluorobenzene 93 <br /> California LUFT Manual <br /> Analyzed by: DAO <br /> Date : 06/01/97 12 :40 : 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 />