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HOUSTON LABORATORY <br /> 8980 INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77064 <br /> Certificate of Analysis No. H9-9901031-02 PHONE(713)960-0901 <br /> - BP Oil Company <br /> 295 SW 41 Street B1dg. 13 , Ste P .O. # <br /> Renton, WA 98055 N/A, COC#100194 <br /> ATTN: Scott Hooton DATE : 01/08/99 <br /> PROJECT: ##11195, 16500 I-5 PROJECT NO: 981223-Y1 <br /> SITE: Lathrop, CA MATRIX: WATER <br /> SAMPLED BY: Blaine Tech Services DATE SAMPLED: 12/23/98 13 : 20 : 00 <br /> SAMPLE ID: B DATE RECEIVED: 12/28/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 390 1 . 0 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 103 <br /> 4-Bromofluorobenzene 97 <br /> Method 8020A*** <br /> Analyzed by: CJ <br /> Date : 01/06/99 <br /> Gasoline Range Organics 0 . 35 0 . 05 P mg/L <br /> Surrogate Recovery <br /> 1 , 4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 93 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: CJ <br /> Date : 01/06/99 11 : 13 : 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 4 1903 <br />