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i <br />0 ZJ040A Certificate <br />Engineering Science, Inc. <br />290 Elwood Davis Rd <br />Liverpool, NY 13088 <br />ATTN: Martin Miller <br />of Analysis No. H9-9512258--02 <br />PROJECT: Greyhound. Stockton <br />SITE: Stockton, Ca. <br />SAMPLED BY: Parson Engineer Science <br />SAMPLE ID: MW -2 <br />PROJECT NO: <br />MATRIX: <br />DATE SAMPLED: <br />DATE RECEIVED: <br />HOUSTON LABORATORY <br />8880 INTERCHANGE DRIVE <br />HOUSTON TEXAS 77054 <br />PHONE (713) 660-0901 <br />DATE: 12/15/95 <br />727211.8969 <br />LIQUID <br />12/05/95 15:00:00 <br />12/06/95 <br />Surrogate % Recovery <br />1,4-Difluorobenzene 98 <br />4--Bromof luorobenzene 91 <br />METHOD 8020*** <br />Analyzed by: VHZ <br />Date: 12/10/95 <br />Total Petroleum Hydrocarbons -Diesel ND 0.1 P mg/L <br />Surrogate % Recovery <br />c-Terphenyl 111 <br />2-Fluorobiphenyl 93 <br />Mod. 8015 - Diesel <br />Analyzed by: SEG <br />Date: 12/12/95 23:59:00 <br />Liquid -liquid extraction 12/10/95 <br />METHOD 3510 *** <br />Analyzed by: DB <br />Date: 12/10/95 10:00:00 <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, 18th 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 />ANALYTICAL DATA <br />PARAMETER <br />RESULTS <br />DETECTION <br />UNITS <br />- <br />LIMIT <br />- <br />BENZENE <br />ND <br />0.5 P <br />µg/L <br />TOLUENE <br />ND <br />0.5 P <br />gg/L <br />ETHYLBENZENE <br />ND <br />0.5 P <br />µg/L <br />TOTAL XYLENE <br />ND <br />0.5 P <br />µg/L <br />TOTAL VOLATILE <br />AROMATIC HYDROCARBONS ND <br />gg/L <br />Surrogate % Recovery <br />1,4-Difluorobenzene 98 <br />4--Bromof luorobenzene 91 <br />METHOD 8020*** <br />Analyzed by: VHZ <br />Date: 12/10/95 <br />Total Petroleum Hydrocarbons -Diesel ND 0.1 P mg/L <br />Surrogate % Recovery <br />c-Terphenyl 111 <br />2-Fluorobiphenyl 93 <br />Mod. 8015 - Diesel <br />Analyzed by: SEG <br />Date: 12/12/95 23:59:00 <br />Liquid -liquid extraction 12/10/95 <br />METHOD 3510 *** <br />Analyzed by: DB <br />Date: 12/10/95 10:00:00 <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, 18th 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 />