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f <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE Dr;IVE <br /> HOUSTON, TEXAS 77054 <br /> -rPificate of .Analysis No . H9-9803153-06 PHONE(713) 660-GS01 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N <br /> Renton, WA 98055 N/A , COCH072100 <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-6 DATE RECEIVED : 03/04/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 590 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 93 <br /> 4 -Bromofluorobenzene 100 <br /> Method 8020A*** r <br /> Analyzed by: LJ i <br /> Date : 03/09/98 <br /> Gasoline Range Organics 0 . 49 0 . 05 P mg/L <br /> Surrogate o Recovery <br /> 1, 4 -Difluorobenzene 70 <br /> 4 -Bromofluorobenzene 80 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: LJ/` <br /> Date : 03/07/98 12 : 05 : 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 /> i <br /> I <br /> t i <br /> II <br /> I <br /> i QUALITY ASSURANCE : These analyses are performed in accordance <br /> with EPA guidelines for quality assurance . <br /> SPL California License # 1903 <br />