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PRECISION <br /> EIMRO-YECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Monday, March 22, 2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 2 of8 <br /> 2201 W Washington St <br /> Stockton, CA 95203 <br />' Volatile Organic Compounds by EPA Method 8260B <br /> Sample Information <br /> Sample ID MW 3-2 Sample Type Grab <br /> Laboratory ID 0400750-02 Project Name Port of Stockton UST Site No 3 <br /> Date/Time Sampled 26-Feb-04 14 15 by Jim Neal Sample Matrix Ground Water-Non Potable <br /> [rest Parameter Result DLR Unit Dilution Batch Prepared Analysis Date Method Notes <br /> Benzene 233 1 00 ug/l 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> Ethylbenzene 161 1 00 ugll 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B� <br /> Toluene 436 100 ug/I 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> m,p-Xylene 601 1 00 ug/1 1 AC42211 01-Mar-04 01-Mar-04 EPA 8260B <br /> o-Xylene 299 1 00 ug/1 1 AC42211 01-Mar-04 01-Mar-04 EPA 82603 <br /> Gasoline _ 747 500 ugfl 1 AC42211 01-Mar-04 01-Mar-04 EPA 82608 <br /> Surrogate Dtbromofluorometha_n_e 92% 86-918 _ <br /> rrogate Toluene-d8 _ 93% 88-110 <br /> gate 4-gromofluorobenzene 104% 86-115 <br /> 1 <br /> 1 <br />'rag I =mdligram%per£rater-ppm DLR=Detection Lin ni for Purpasc of Rcpornng <br /> ug L-mrerol,rants per I iter-pph £xecpn o nal sannpic.matrices or inrcrferenccs may <br /> reVdf to hrghcr daeawn lmnnls <br /> WECTFULLY SUBMITTED, <br />'Jonathan Le,Laboratory Director <br /> 7743 N We'Q Lane Suite .132 Slockton CA 95210 Dhone (209) 477-8105 Fax (209) 477-8148 <br />