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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> O HOUSTON, TEXAS 77054 <br /> R <br /> ". PHONE(713)660-0901 <br /> Certificate of Analysis No. H9-9603232-06 <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 PROJ39CT 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 14 : 10 : 00 <br /> SAMPLE ID: S-6 DATE RECEIVED: 03/06/96 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> MTBE 1200 250 P Ag/L <br /> Benzene 3 . 2 0 . 5 P jtg/L <br /> Toluene ND 1 P µg/L <br /> Ethylbenzene 270 1 P µg/L <br /> Total Xylene 227 1 P µg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 87 <br /> 4-Bromofluorobenzene 73 <br /> METHOD 8020*** <br /> Analyzed by: AA <br /> Date : 03/10/96 <br /> Total Petroleum Hydrocarbons-Gasoline 1 . F? 0 . 05 P mg/L <br /> Surrogate o Recovery <br /> 1, 4-Difluorobenzene 125 <br /> 4-Bromofluorobenzene (38n <br /> CA LUFT - Gasoline <br /> Analyzed by: AA <br /> Date : 03/09/96 04 : 24 : 00 <br /> (P) - Practical Quantitation Limit ND - Not detected. <br /> - Recovery beyond control limits . <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 />