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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 <br /> PHONE(713)660 0901 <br /> Certificate of Analysis No. H9-9506980-03 <br /> EZ Serve Inc <br /> 2550 North Loop West, #600 <br /> Houston, TX 77292 <br /> ATTN Brian Cobb DATE: 07/06/95 <br /> PROJECT: EZ-Serve 4100966 PROJECT NO: 1566-04 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Brown & Caldwell DATE SAMPLED: 06/21/95 11 :58 00 <br /> SAMPLE ID: 100966 MW-1 FB DATE RECEIVED: 06/23/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE 0 . 6 0 5 P µg/L <br /> TOLUENE 2 0 . 5 p jug/L <br /> ETHYLBENZENE ND 0 5 P lig/L <br /> TOTAL XYLENE 1 0 5 P µg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 3 . 6 µg/L <br /> Surrogate $ Recovery <br /> 1, 4 -Difluorobenzene 95 <br /> 4-Bromofluorobenzene 87 <br /> METHOD 8020*** <br /> Analyzed by VHZ <br /> Date 06/30/95 <br /> Petroleum Hydrocarbons - Gasoline ND 50 P Ag/L <br /> Surrogate $ Recovery <br /> 1, 4 -Difluorobenzene 90 <br /> 4-Bromofluorobenzene 97 <br /> Modified 8015 - Gasoline <br /> Analyzed by VHZ <br /> Date - 06/30/95 <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, 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 anager <br />