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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> r@ificate of Analysis No. H9-9809787-05 HOUSTON, TEXAS 77054PHONE (713) 660-0901 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13, Ste N P .O. # <br /> Renton, WA 98055 N/A , COC#095812 <br /> ATTN: Scott Hooton DATE : 09/29/98 <br /> PROJECT: #11193 , 3202 Hammer Lane PROJECT NO: 1.0-136-07-004 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 09/1.8/98 14 : 24 : 00 <br /> SAMPLE ID: S-5 DATE RECEIVED: 09/22/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 14000 1000 P ug/L <br /> Benzene 69 0 . 5 P ug/L <br /> Toluene 1 . 8 1 . 0 P ug/L <br /> Ethylbenzene ND 100 P ug/L <br /> Total Xylene 7 . 7 1 . 0 P ug/L <br /> Surrogate % Recovery <br /> 1 , 4-Difluorobenzene 113 <br /> 4-2romofluorobenzene 100 <br /> Method 8020A*** <br /> Analyzed by: YN <br /> Date : 09/25/98 <br /> Gasoline Range Organics 12 5 P mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 80 <br /> 4-Bromofluorobenzene 93 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: YN <br /> Date : 09/25/98 02 : 38 : 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 />