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e.i lu a <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® � ® <br /> HOUSTON <br /> PHONE(7 3TEXAS <br /> 660 09014 <br /> iCertificate of Analysis No. H9-9503488-03 <br /> Engineering Science, Inc. <br /> 290 Elwood Davis Rd <br /> Liverpool, NY 13088 <br /> ATTN: Martin Miller DATE: 07/11/95 <br /> PROJECT: Greyhound Stockton PROJECT NO: 727211. 08969 <br /> SITE: Stockton MATRIX: WATER <br /> SAMPLED BY: Engineering Science DATE SAMPLED: 03/09/95 16: 20: 00 <br /> SAMPLE ID: MW-3 DATE RECEIVED: 03/11/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0. 5 P µg/L <br /> TOLUENE ND 0 . 5 P gg/L <br /> ETHYLBENZENE ND 0. 5 P ug/L <br /> TOTAL XYLENE ND 0. 5 P µg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND 4g/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 78 <br /> 4-Bromofluorobenzene 88 <br /> METHOD 8020*** <br /> Analyzed by: YN <br /> Date: 03/16/95 <br /> Petroleum Hydrocarbons - Gasoline ND 0. 05 P mg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 94 <br /> 4-Bromofluorobenzene 58 <br /> Modified 8015 - Gasoline <br /> Analyzed by: YN <br /> Date: 03/16/95 <br /> Total Petroleum Hydrocarbons-Diesel ND 4. 05 P mg/L <br /> ND - Not detected. (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 /> • <br /> SPL, Inc. , - Proje t anagen <br />