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O <br /> Certificate of Analysis No. 2409105-13 <br /> Engineering Science, Inc. <br /> 290 Elwood Davis Rd <br /> f Liverpool, NY 13088 <br /> ATTN: Martin Miller DATE: 09/26/94 <br /> PROJECT: Greyhound #8969 PROJECT NO: 725386.08969 <br /> SITE: Stockton, California MATRIX: SOIL <br /> SAMPLED BY: Engineering Sciences DATE SAMPLED: 08/31/94 08:00:00 <br /> SAMPLE ID: SB7-20 DATE RECEIVED: 09/02/94 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> r BENZENE ND 1 P µg/Kg <br /> TOLUENE ND 1 P µg/Kg <br /> ` ETHYLBENZENE ND 1 P Ag/Kg <br /> TOTAL XYLENE ND 1 P Ag/Kg <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/Kg <br /> Surrogate Recovery <br /> 1,4-Difluorobenzene SO <br /> 4-Bromofluorobenzene 77 <br /> METHOD 8020*** <br /> j Analyzed by: MOO <br /> Date: 09/11/94 <br /> Total Petroleum Hydrocarbons-Diesel 2.0 1 P mg/kg <br /> S <br /> Surrogate % Recovery <br /> n-Pentacosane 169 « <br /> Mod. 8015 - Diesel <br />+ Analyzed by: SEG <br /> Date: 09/13/94 17:59:00 <br /> ND - Not detected. (P) - Practical Quantitation Limit <br /> « - Recovery beyond control limits. <br /> I <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 /> r with EPA guidelines for quality assurance. <br />` SPL California License # 1903 <br /> SPL, Inc. , - Pr1j <br /> ect Manager <br />