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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> PHONE(713)660.0901 <br /> Certificate of Analysis No. H9-9603232-04 <br /> Alisto Engineering <br /> 1575 Treat Blvd. P.O. # <br /> Walnut Creek, CA 94598 G620564 COC#055954 <br /> ATTN: Bill Howell DATE : 03/18/96 <br /> PROJECT: BP Oil ##11195 PROJECT NO: 10-151-04-003 <br /> SITE: 16500 S . I-5, Letrop, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 02/28/96 13 : 10 : 00 <br /> SAMPLE ID: S-4 DATE .RECEIVED: 03/06/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 1400 250 P Ag/L <br /> Benzene 2 . 1 0 . 5 P µg/L <br /> Toluene ND 1 p µg/L <br /> Ethylbenzene 2 1 P µg/L <br /> Total Xylene ND 1 P gg/L <br /> Surrogate % Recovery <br /> 1 , 4-Difluorobenzene 96 <br /> 4-Bromofluorobenzene 80 <br /> METHOD 8020*** <br /> =� Analyzed by: AA <br /> Date : 03/10/96 <br /> Total Petroleum Hydrocarbons-Gasoline 0 . 09 0 . 05 P mg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 106 <br /> 4-Bromofluorobenzene 75 <br /> CA LUFT - Gasoline <br /> Analyzed by: AA <br /> Date : 03/09/96 03 :34 : 00 <br /> (P) - Practical Quantitation Limit ND - Not detected. <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 />