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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> '14Z ® HOUSTON TEXAS 77054 <br /> zlm � m PHONE(713)660 0901 <br /> Certificate of Analysis No. H9-9506980-10 <br /> EZ Serve Inc <br /> 2550 North Loop West, #600 <br /> Houston, TX 77292 <br /> ATTN Brian Cobb DATE: 07/06/95 <br /> PROJECT: EZ--Serve #100966 PROJECT NO: 1566-04 <br /> SITE: Stockton, CA MATRIX: WATER <br /> SAMPLED BY: Brown & Caldwell DATE SAMPLED: 06/20/95 16 : 17 . 00 <br /> SAMPLE ID: 100966 MW-8 DATE RECEIVED: 06/23/95 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> BENZENE ND 0 5 P Ag/L <br /> TOLUENE ND 0 . 5 P µg/L <br /> ETHYLBENZENE ND 0 . 5 P µg/L <br /> TOTAL XYLENE 0 . 6 0 5 P Ecg/L <br /> TOTAL VOLATILE AROMATIC HYDROCARBONS 0 6 µg/L <br /> Surrogate Recovery <br /> 1, 4-Difluorobenzene 96 <br /> 4-Bromofluorobenzene 93 <br />• METHOD 8020*** <br /> Analyzed by VHZ <br /> Date 07/01/95 <br /> Petroleum Hydrocarbons - Gasoline ND 50 P µg/L <br /> Surrogate % Recovery <br /> 1, 4-Difluorobenzene 92 <br /> 4-Bromofluorobenzene 118 <br /> Modified 8015 - Gasoline <br /> Analyzed by. VHZ <br /> Date : 07/01/95 <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 /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance <br /> SPL California License # 1903 <br /> SPL, Inc . , - Project Manager <br />