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HOUSTON LABORATORY <br /> 6860 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 7705111 <br /> ertificate of Analysis No. H9-9809326-04 PHONE(713)660-0901 ;0'r':::j <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P.O.# <br /> Renton, WA 98055 H405058, COC#095813 <br /> ATTN: Scott Hooton DATE: 09/17/9 <br /> PROJECT: #11195 , PROJECT NO: 10-151-9-3 <br /> SITE: Lathrop, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 09/03/98 <br /> SAMPLE ID: S-4 DATE RECEIVED: 09/09/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE ND 50 P ug/ <br /> Benzene ND 2 . 5 P ug/L <br /> Toluene ND 5 . 0 P ug/" <br /> Ethylbenzene ND 5. 0 P ug/ <br /> Total Xylene ND 5 . 0 P ug/L <br /> Surrogate o Recovery <br /> 1 , 4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 93 <br /> Method 8020A*** <br /> Analyzed by: YN <br /> Date: 09/14/98 <br /> Gasoline Range Organics ND 0. 25 P m <br /> g/- <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 80 <br /> 4-Bromofluorobenzene 93 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: YN <br /> Date: 09/14/98 08 : 00 : 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 /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance. <br /> SPL California License # 1903 <br />