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HOUSTON LABORATORY <br /> Copy 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> PHONE(713)660-0901 <br /> Certificate of Analysis No. H9-9503750-09 <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 1100966 PROJECT NO: 1567-04 <br /> SITE: Stockton, CA MATRIX: LIQUID <br /> SAMPLED BY: Brown & Caldwell DATE SAMPLED: 03/16/95 15: 45: 00 <br /> SAMPLE ID: 100966-MW-1D DATE RECEIVED: 03/18/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE 27 0.5 P µg/L <br /> TOLUENE 9 0.5 P Ag/L <br /> ETHYLBENZENE 2 0. 5 P Ag/L <br /> TOTAL XYLENE 16 0. 5 P gg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 54 gg/L <br /> Surrogate Recovery <br /> 1,4-Difluorobenzene 95 <br /> 4-Bromof luorobenzene 84 <br /> METHOD 8020*** <br /> Analyzed by: VHZ <br /> Date: 03/23/95 <br /> Petroleum Hydrocarbons - Gasoline 320 50 P gg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 95 <br /> 4-Bromofluorobenzene 91 <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 /> SPL, Inc. , - Project Manager <br />