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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIV� <br /> HOUSTON,TEXAS 77054 PHONE{713)660.0901 <br /> Certificate of Analysis No. H9-9801349-08 l <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 ,Ste N P.O. # <br /> Renton, WA 98055 H177174, COC#055969 <br /> ATTN: Scott Hooton DATE: 01/19/98 <br /> PROJECT: #11193 , N/A PROJECT NO: 10-136-7-2 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 01/07/98 <br /> SAMPLE ID: S-8 DATE RECEIVED: 01/10/98 <br /> r <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 18000 1000 P Ing/L <br /> Benzene 110 0. 5 P gg/L <br /> Toluene ND 1. 0 P gg/L <br /> Ethylbenzene ND 1. 0 P µg/L <br /> Total Xylene 2 , 3 1. 0 P Mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 123 <br /> 4-Bromofluorobenzene 93 <br /> Method 8020A*** 0 <br /> Analyzed by: VHZ <br /> Date: 01/16/98 <br /> Gasoline Range Organics 12 1. 2 P mg/L <br /> Surrogate o Recovery <br /> 1, 41-Difluorobenzene 73 <br /> 4-Bromofluorobenzene 104 <br /> California LUFT Manual for Gasoline <br /> Analyzed by: VHZ <br /> Date: 01/15/98 09 : 56 : 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 />