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HOUSTON LABORATORY <br /> 8860 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 <br /> PHONE(713)660 0901 <br /> Certificate of Analysis No. H9-9704960-02 . <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P.O.# <br /> Renton, WA 98055 G797556, COC#055992 <br /> ATTN Scott Hooton DATE 04/29/97 <br /> PROJECT: BP Oil #11194 PROJECT NO: 10-085-10-2 <br /> SITE: Tracy , CA. MATRIX: WATER <br /> SAMPLED BY: Alzsto Engineering DATE SAMPLED: 04/16/97 <br /> SAMPLE ID: S-2 DATE RECEIVED: 04/18/97 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 131 50 P µg/L <br /> Benzene 173 2 5 P µg/L <br /> Toluene ND 5 0 P µg/L <br /> Ethylbenzene 775 5 0 P µg/L <br /> Total Xylene 767 5 0 P µg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 103 <br /> 4-Bromofluorobenzene 109 <br /> Method 8020A*** <br /> Analyzed by: SB <br /> Date : 04/28/97 <br /> Total Petroleum Hydrocarbons-Gasoline 5 0 1 2 P mg/L <br /> Surrogate $ Recovery <br /> 1, 4--Difluorobenzene 80 <br /> 4-Bromofluorobenzene 88 <br /> California LUFT Manual <br /> Analyzed by: VHZ <br /> Date . 04/27/97 10 : 16 . 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 />