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HOUSTON LABORATORY <br /> ZAII� 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 7705-1 <br /> _rLficate of Analysis No . H9-9803153 -07 PHONE(713)scw,1901 <br /> BP Oil Company y <br /> 295 SW 41st St , Bldg 13 , Ste N P . O • - <br /> Renton, WA 98055 N/A , COC-072100 <br /> ATTN : Scott Hooton DATE : 03/17/98 <br /> PROJECT: #11192 , N/A PROJECT NO: 10-037 .07/001 <br /> SITE : Stockton, CA MATRIX : WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED : 02/26/98 <br /> SAMPLE ID : S-7 DATE RECEIVED : 03/04/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 680 50 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 97 <br /> 4 -Bromofluorobenzene 97 <br /> Method 8020A*** <br /> Analyzed by : LJ <br /> Date : 03/09/98 <br /> Gasoline Range Organics 0 . 46 0 . 05 P mg/E, <br /> Surrogate % Recovery <br /> 1 , 4 -Difluorobenzene 67 <br /> 4 -Bromofluorobenzene 80 <br /> California LUFT Manual for Gasoline <br /> Analyzed by : LJ/ <br /> Date : 03/07/98 12 : 31 : 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 />