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19 <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> A4 0040 W.Mz_ HOUSTON TEXAS 77054 <br /> PHONE(713)660 0901 <br /> Certificate of Analysis No. H9-9704960-04 <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: Alisto Engineering DATE SAMPLED: 04/16/97 <br /> SAMPLE ID: S-4 DATE RECEIVED: 04/18/97 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE ND 100 P µg/L <br /> Benzene ND 5 0 P Ag/L <br /> Toluene ND 10 0 P µg/L <br /> Ethylbenzene ND 10 0 P µg/L <br /> Total Xylene ND 10 0 P ug/L <br /> Surrogate $ Recovery <br /> 1, 4-Difluorobenzene 98 <br /> 4--Bromofluorobenzene 98 <br /> Method 8020A*** <br /> Analyzed by. VHZ <br /> Date 04/27/97 <br /> Total Petroleum Hydrocarbons-Gasoline ND 0 . 5 P mg/L <br /> Surrogate $ Recovery <br /> 1, 4-Difluorobenzene 80 <br /> 4-Bromofluorobenzene 90 <br /> California LUFT Manual <br /> Analyzed by VHZ <br /> Date- 04/27/97 05 51 : 00 <br /> ND - Not detected (P) - Practical Quantitation Limit <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 />