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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 <br /> PHONE(713)660-0901 <br /> Certificate of Analysis No. H9-9506980-09 <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 #100966 PROJECT NO: 1566-04 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Brown & Caldwell DATE SAMPLED: 06/20/95 17 . 10 : OC <br /> SAMPLE ID: 100966 MW-7 DATE RECEIVED: 06/23/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> BENZENE LIMIT TOLUENE 16 0 5 P µg/L <br /> 5 0 . 5 P �,g/L <br /> ETHYLBENZENE 3 0 5 P g/L <br /> TOTAL XYLENE 18 0 . 5 P 1Lg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 42 ag/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 96 <br /> 4-Bromofluorobenzene 94 <br />• METHOD 8020*** <br /> Analyzed by- VHZ <br /> Date 07/01/95 <br /> Petroleum Hydrocarbons - Gasoline 150 50 P µg/L <br /> Surrogate % Recovery <br /> 1, 4-Dzfluorobenzene 90 <br /> 4-Bromofluorobenzene 10$ <br /> Modified 8015 - Gasoline <br /> Analyzed by: VHZ <br /> Date 07/01/95 <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 . , - Pro]ect Manager <br />