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Col HOUSTON LABORATORY <br /> COPY 8880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> -OZ• PHONE(713)660 0901 <br /> Certificate of Analysis No. H9-9503750-08 <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 11:27:00 <br /> SAMPLE ID: 100966-MW-8 DATE RECEIVED: 03/18/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE 7 0. 5 P gg/L <br /> TOLUENE 24 0.5 P µg/L <br /> ETHYLBENZENE 5 0.5 P Ag/L <br /> TOTAL XYLENE 23 0.5 P gg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 59 gg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 97 <br /> 4-Bromof luorobenzene 95 <br /> 40 METHOD 8020*** <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <br /> Petroleum Hydrocarbons - Gasoline 130 50 P gg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 97 <br /> 4-Bromof luorobenzene 138 <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, Yn . , �Pro3ect Manager <br />