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i <br /> I <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> COPY <br /> O HOUSTON TEXAS 77054 <br /> Ale PHONE (713)660-0901 <br /> Certificate of Analysis No. H9-9503750-01 <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: Brown & Caldwell DATE SAMPLED: 03/16/95 15:42 : 00 <br /> SAMPLE ID: 100966-MW-1 DATE RECEIVED: 03/18/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE 32 0. 5 P Ag/L <br /> TOLUENE 11 0. 5 P gg/L <br /> ETHYLBENZENE 3 0. 5 P Ag/L <br /> TOTAL XYLENE 20 0. 5 P Ag/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 66 µg/L <br /> Surrogate `k Recovery <br /> 1,4-Difluorobenzene 100 <br /> 4-Bromof luorobenzene 98 <br /> METHOD 8020*** <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <br /> Petroleum Hydrocarbons - Gasoline 370 50 P µg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 93 <br /> 4-Bromof luorobenzene 99 <br /> Modified 8015 - Gasoline <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <br /> (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 /> PL, c , - Project Manager <br />