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' PRECISION <br /> ENVIEO-�'ECH <br />' Analytical Laboratory CERTIFICATE OFANAL YSIS <br /> Monday, Mar ch 22, 2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 4 of <br /> 2201 W Washington St <br /> Stockton, CA 95203 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sample Information <br /> Sample ID MW 3-5 Sample Type Grab <br /> Laboratory ID 0400750-04 Project Name Port of Stockton UST Site No 3 <br /> Date/Time Sampled 26-Feb-04 14 45 by Jim Neal Sample Matrix Ground Water-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Prepared Analysis Date Method Notes <br /> Benzene ND 100 ugll 1 AC42211 01-Mar-04— 01-Mar-04 EPA 8260B <br /> Ethylbenzene _ ND 100 ugll 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> Toluene ND 100 Ug/1 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> m,p-Xylene 1 05 100 ugll i AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> o-Xylene ND 1 00 ugll 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> Gasoline ND 50 0 ug/1 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> Surrogate D_rbromofluoromethane 92% 86-118 <br /> Surrogate Toluene-0 _ _ 94% 88-110 <br /> gate 4-Bromofluorobenzene 101 % 86-115 <br /> 1 <br /> mg I nnl6grams per I Iter—ppm 1)112 Dercclxm I mul fir Purlxxc of Rcparrtng <br /> u�1 nncrngramt per 1 Ncr=pph Fmpnonal sample ntalrtcct or rntcrfercnccti may <br /> retiull m hrl,her detccoon hmtts <br /> IDPECTFULLY SUBMITTED, <br /> I :W'� <br />'Jonathan Le,Laboratory Director <br /> 7743 N Njest Lana Sults B2 Stockton CA 95210 Phone (209) 477-810 Fax (209) -177-X148 <br />