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HOUSTON LABORATORY <br /> 8860 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 <br />• PHONE(773)660 0901 <br /> Certificate of Analysis No. H9--9506462-02 <br /> Engineering Science, Inc. <br /> 290 Elwood Davis Rd <br /> Liverpool, NY 13088 <br /> ATTN: Martin Miller DATE: 06/23/95 <br /> PROJECT: Greyhound Stockton PROJECT NO: 727211. 08969 <br /> SITE: Stockton MATRIX: WATER <br /> SAMPLED BY: Engineering Science DATE SAMPLED: 06/08/95 13 :35: 00 <br /> SAMPLE ID: MW-2 DATE RECEIVED: 06/12/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0. 5 P Mg/L <br /> TOLUENE ND 0. 5 P jAg/L <br /> ETHYLBENZENE ND 0. 5 P pg/L <br /> TOTAL XYLENE ND 0. 5 P µg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/L <br /> Surrogate Recovery <br /> 1,4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 102 <br /> METHOD 8020*** <br /> Analyzed by: RR <br /> Date: 06/20/95 <br /> Total Petroleum Hydrocarbons-Diesel ND 0. 05 P mg/L <br /> Surrogate Recovery <br /> o-Terphenyl 84 <br /> 2-Fluorobiphenyl 50 <br /> Mod. 8015 - Diesel <br /> Analyzed by: SEG <br /> Date: 06/16/95 04 :45 :00 <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 /> 16— OLI_ <br /> SPL, Inc. , - Projtct Manager <br />