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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> rt�ficate of Analysis No. H9-9807329-05 PHONE (713) 660-0901 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P .O .# <br /> Renton, WA 98055 H339131 , COC#098640 <br /> ATTN: Scott Hooton DATE : 07/21/98 <br /> PROJECT: #11192, PROJECT NO: 10-037-7-2 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 07/07/98 <br /> SAMPLE ID: S-5 DATE RECEIVED: 07/09/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 2400 250 P ug/L <br /> Benzene ND 0 . 5 P ug/L <br /> Toluene ND 1 . 0 P ug/L <br /> Ethylbenzene ND 1 . 0 P ug/L <br /> Total Xylene ND 1 . 0 P ug/L <br /> Surrogate % Recovery <br /> 1 , 4 -Difluorobenzene 87 <br /> 4-Bromofluorobenzene 95 <br /> Method 8020A*** <br /> Analyzed by: YN/ <br /> Date : 07/17/98 <br /> Gasoline Range Organics 1 . 8 0 . 05 P mg/L <br /> Surrogate % Recovery <br /> 1 , 4-Difluorobenzene 147MI <br /> 4-Bromofluorobenzene 90 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: LJ/ <br /> Date : 07/16/98 02 : 39 : 00 <br /> (P) - Practical Quantitation Limit ND - Not detected. <br /> MI - Matrix interference . <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 />