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r <br /> i <br /> z <br /> 0 <br /> Certificate of Analysis No. 9408874-11 <br /> N� Engineering Science, Inc. <br /> 290 Elwood Davis Rd <br /> Liverpool, NY 13088 <br /> ATTN: Martin Miller DATE: 09/21/94 <br /> m PROJECT: Greyhound Bus Lines 18969 PROJECT NO: 725386.08969 <br /> SITE: Stockton, CA MATRIX: SOIL <br /> SAMPLED BY: Engineering Science, Inc. DATE SAMPLED: 08/29/94 11:40:00 <br /> SAMPLE ID: SB2-10 DATE RECEIVED: 08/31/94 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> BENZENE LIMIT <br /> TOLUENE ND 1 P µg/Kg <br /> ETHYLBENZENE ND 1 P Ag/KgND 1 P µq/Kg <br /> TOTAL XYLENE ND 1 P µg/Kg <br /> ' TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/Kg <br /> Surrogate Recovery <br /> 1,4-Difluorobenzene so <br /> 4-Bromofluorobenzene 88 <br /> METHOD 8020*** <br /> Analyzed by: DAO <br /> Date: 09/02/94 <br /> 4 <br /> Total Petroleum Hydrocarbons-Diesel ND 1 P mg/kg <br /> Surrogate % Recovery <br /> n-Pentacosane 75 <br /> Mod. 8015 - Diesel <br /> Analyzed by: SEG <br /> Date: 09/09/94 15:52 :01 <br /> ND - Not detected. <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 /> r <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance. <br /> SPL California License , 1903 <br /> SPL, Inc. , - Pr ct Manager <br />