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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ertificate of Analysis No. H9-9801349-07 PHONE (713)660.0901 <br /> BP Oil Company <br /> 295 SW 41st St , Bldg 13 , Ste N P .O. ## <br /> Renton, WA 98055 H177174 , COC#055969 <br /> ATTN: Scott Hooton DATE : 01/20/98 <br /> PROJECT: #11193 , N/A PROJECT NO: 10-136-7-2 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 01/07/98 <br /> SAMPLE ID: S-7 DATE RECEIVED: 01/10/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 17000 1000 P µg/L <br /> Benzene 90 2 . 5 P µg/L <br /> Toluene ND 5 . 0 P µg/L <br /> Ethylbenzene ND 5 . 0 P kcg/L <br /> Total Xylene ND 5 . 0 P jg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 97 <br /> 4-Bromofluorobenzene 100 <br /> Method 8020A*** <br /> Analyzed by: HS <br /> Date : 01/17/98 <br /> Gasoline Range Organics 16 2 . 5 P mg/L <br /> Surrogate $ Recovery <br /> 1, 4-Difluorobenzene 73 <br /> 4-Bromofluorobenzene 107 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: VHZ <br /> Date : 01/15/98 10 :23 : 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 />