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IPAo <br /> Certificate of Analysis No. 940SB74-20 <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 #8969 PROJECT NO: 725386.08969 <br /> ' SITE: Stockton, CA MATRIX: SOIL <br /> SAMPLED BY: Engineering Science, Inc. DATE SAMPLED: 08/29/94 14:37:00 <br /> SAMPLE ID: SB3-10 DATE RECEIVED: 08/31/94 <br /> ' ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 1 P µg/Kg <br /> TOLUENE ND 1 P µg/Kg <br /> ETHYLBENZENE ND 1 P µg/Kg <br /> TOTAL XYLENE ND 1 P Ag/Kg <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS ND µg/Kg <br /> Surrogate % Recovery <br /> 1,4-Difluorobenzene 79 <br /> l 4-Bromofluorobenzene 79 <br /> METHOD 8020*** <br /> ' Analyzed by: DAO <br /> Date: 09/02/94 <br /> Total Petroleum Hydrocarbons-Diesel 1.0 1 P mg/kg <br /> Surrogate % Recovery <br /> n-Pentacosane 102 <br /> Mod. 8015 - Diesel <br /> Analyzed by: SEG <br /> Date: 09/09/94 15:52:00 <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 /> t <br /> c� QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance. <br /> SPL California License # 1903 <br /> 4 <br /> i', SPL, Inc. , - Projec anager <br />