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L <br /> O <br /> Certificate of Analysis No. 940BB70-05 <br /> Engineering Science, Inc. <br /> 290 Elwood Davis Rd <br /> Liverpool, NY 13088 <br /> ATTN: Martin Miller DATE: 09/21/94 <br /> PROJECT: Greyhound Bus Lines _ PROJECT NO: 725386.08969 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Provided by SPL DATE SAMPLED: 08/22/94 <br /> SAMPLE ID: Trip Blank DATE RECEIVED: 08/31/94 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0. 5 P pg/L <br /> TOLUENE ND - 0. 5 P µg/L <br /> ETHYLBENZENE ND 0. 5 P µg/L <br /> TOTAL XYLENE ND 0. 5 P pg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 91 <br /> 4-Bromofluorobenzene 59 <br /> METHOD 8020*** <br /> Analyzed by: MOO <br /> Date: 09/12/94 <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. , - Eyf6jeqt Manager <br />