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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANAL YSIS <br /> Tuesday,June 15, 2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 3 of 14 <br /> P O Box 2089 <br /> Stockton, CA 95201-2089 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sample Information <br /> Sample ID MW 3-2 Sample Type Grab <br /> Laboratory ID 0401800-02 Project Name Port of Stockton UST Site No 3 <br /> Date/Time Sampled 21-May-04 14 28 by Jun Neal Sample Matrix Ground Wafer-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Prepared Analysts Date Method Notes <br /> Benzene 104 0 500 ugll 1 AF41501 27-May-04 27-May-04 EPA 82608 <br /> Ethylbenzene 55 0 0 500 ug/1 1 AF41501 27-May 04 27-May-04 EPA 82606 <br /> Toluene 291 0 500 ugll 1 AF41501 27-May-04 27-May-04 EPA 8260E <br /> m,P-Xylene 332 0500 ug/1 1 AF41501 27-May-04 27-May-04 EPA 8260E <br /> 7D-Xylene 178 0 500 ugll 1 AF41501 27-May-04 27-May-04 EPA 82606 <br /> 5urmwe 4-Bramofluorobenzene 104% 86-115 <br /> mgL—milligrams per Luer-ppm DLR=Detecttan Limit for purpose of Reporting <br /> ug'L=micrograms per Luer-ppb Etcepttonal sample matrices or imerferencec may <br /> result in higher detection limits <br /> *ECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 77.4 N WpCt Tnvtp ''717t19 R7 C"tnrlrinvi f"d OS?If) nlnnmo /7f}0l 477 ;1�1n; IT - IM01 177 Q7 fP <br />