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HOUSTON LABORATORY <br /> 6680 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> rt ficate of Analysis No. H9-9807329-04 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: 411192 , 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-4 DATE RECEIVED: 07/09/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE ND 10 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 80 <br /> 4-Bromofluorobenzene 97 <br /> Method 8020A*** <br /> Analyzed by: LJ/ <br /> Date : 07/16/98 <br /> Gasoline Range Organics ND 0 . 05 P mg/L <br /> Surrogate o Recovery <br /> 1 , 4 -Difluorobenzene 120 <br /> 4-Bromofluorobenzene 93 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: LJ/ <br /> Date : 07/16/98 02 : 02 : 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 /> i <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance . <br /> SPL California License # 1903 <br />