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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ,Z-4 HOUSTON, TEXAS 77054 <br /> e ificate of Analysis No. H9-9710A01-04 PHONE (713)660-0901 <br /> Building Analytics <br /> 528 State Street <br /> Glendale, CA 91203 <br /> ' ATTN: Joe Montoya DATE : 11/05/97 <br /> PROJECT: Stockton PROJECT NO: 197501 <br /> SITE: Wilsonway Stockton MATRIX: WATER <br /> SAMPLED BY: Building Analytics DATE SAMPLED: 10/20/97 15 : 00 : 00 <br /> SAMPLE ID: MW-1 DATE RECEIVED: 10/21/97 <br /> ' ANALYTICAL DATA <br /> PARAMETER RESULTS DETECTION UNITS <br /> LIMIT <br /> Gasoline Range Organics ND 100 P ug/L <br /> Surrogate % Recovery <br /> 4-Bromofluorobenzene 70 <br /> 1, 4 Difluorobenzene 97 <br /> Method Modified 8015A*** for Gasoline <br /> Analyzed by: FAB <br /> Date : 11/03/97 <br /> MTBE ND 10 P µg/L <br /> Benzene ND 0 . 5 P µg/L . <br /> Toluene ND 1 . 0 P yg/L <br /> Ethylbenzene ND 1 . 0 P j.g/L <br /> 1 Total Xylene ND 1 . 0 P Ag/L <br /> Surrogate % Recovery <br /> I 1, 4-Difluorobenzene 100 <br /> 4-Bromofluorobenzene 83 <br /> Method-.8020A*** <br /> Analyzed by: fab <br /> Date : 11/03/97 <br /> Liquid-liquid extraction 10/27/97 <br /> 1 Method 35109 *** <br /> Analyzed by: DL <br /> Date : 10/27/97 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 /> I QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance . <br /> SPL California License # 1903 <br />