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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 <br />. PHONE(713)660-0901 <br /> Certificate of Analysis No. H9-9506462-04 <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: Provided by SPL DATE SAMPLED: 06/07/95 <br /> SAMPLE ID: Trip Blank DATE RECEIVED: 06/12/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0. 5 P µg/L <br /> TOLUENE ND 0. 5 P µg/L <br /> ETHYLBENZENE ND 0. 5 P Mg/L <br /> TOTAL XYLENE ND 0. 5 P µg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND Ag/L <br /> Surrogate $ Recovery <br /> 1, 4-Difluorobenzene 101 <br /> 4-Bromofluorobenzene 101 <br /> METHOD 8020*** <br /> Analyzed by: VHZ <br /> Date: 06/19/95 <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 /> SPL, Inc. , - Proj49ct Manager <br />