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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> Meier TEXAS 770 <br /> r-ificate of Analysis No. H9-9809787-04 HOUSTON, <br /> PHONE (73)660-0905 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N <br /> Renton, WA 98055 P • �• # <br /> ATTN: Scott Hooton N/A COC#095812 <br /> DATE: 09/29/98 <br /> PROJECT: #11193 , 3202 Hammer Lane PROJECT NO: 10-136-07-004 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 09/18/98 13 : 55 : 00 <br /> SAMPLE ID: S-4 DATE RECEIVED: 09/22/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> MTBE LIMIT <br /> Benzene 3500 250 P ug/L <br /> Toluene ND 0 . 5 P ug/L <br /> Ethylbenzene ND 1 . 0 P ug/L <br /> Total Xylene ND 1 . 0 P ug/L <br /> ND 1 . 0 P ug/L <br /> Surrogate % Recovery <br /> 1 , 4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 103 <br /> Method 8020A*** <br /> Analyzed by: YN <br /> Date : 09/25/98 <br /> Gasoline Range Organics 3 . 0 1 . 2 P <br /> mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 81 <br /> 4-Bromoflucrobenzene 95 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: YN <br /> Date : 09/25/98 02 : 00 : 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 />