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0n HOUSTON LABORATORY <br /> � u 8880 INTERCHANGE DRIVE <br /> Oa COPY HOUSTON TEXAS 77054 <br /> + PHONE(713)660 0907 <br /> Certificate of Analysis No. H9-9503750-11 <br /> EZ Serve Inc. <br /> 2550 North Loop West, #600 <br /> Houston, TX 77292 <br /> ATTN: Brian Cobb DATE: 04/20/95 <br /> PROJECT: EZ Serve #100966 PROJECT NO: 1567-04 <br /> SITE: Stockton, CA MATRIX: LIQUID <br /> SAMPLED BY: Provided by SPL DATE SAMPLED: 03/05/95 <br /> SAMPLE ID: Trip Blank DATE RECEIVED: 03/18/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0. 5 P µg/L <br /> TOLUENE ND 0. 5 P Ag/L <br /> ETHYLBENZENE ND 0. 5 P µg/L <br /> TOTAL XYLENE ND 0. 5 P Ag/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/L <br /> Surrogate Recovery <br /> 1, 4-Dif luorobenzene 100 <br /> 4-Bromofluorobenzene 95 <br /> METHOD 8020*** <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <br /> Petroleum Hydrocarbons - Gasoline ND 50 P Ag/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 98 <br /> 4-Bromofluorobenzene 105 <br /> Modified 8015 - Gasoline <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <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, 17th 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 /> P , nc. , - Project Manager <br />