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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,March 29, 2005 <br /> Attention• Jack Bishop <br /> California Tank Lines Report Page 14 of 21 <br /> P O BOX 6245 <br /> Stockton, CA 95206 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sample Information <br /> Sample ID- MW-4 Sample Type: Grab <br /> Laboratory ID: 5031206-04 Project Name: QM Q1 2005 <br /> DatelTtme Sampled: 11-Mar-05 14 45 by Sorenson Sample Matrix• Ground Water-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Prepared Analysis Date Method Notes <br /> Acetone 886 500 ugll 1 AC51507 15-Mar-05 16-Mar-05 EPA 8250B <br /> tert-Butyl Acohol(TBA) ND 500 ug/1 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260B <br /> Methyl tent-butyl Ether(MtBE) ND 0 500 ugll 1 AC51507 15-Mar-05 16-Mar-05 EPA 82608 <br /> Dnsopropyl Ether(DIPE) 777 - 0 500 ug/I 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260B <br /> Ethyl tert-Butyl Ether(ETRE) ND - 0 500 ugll 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260B <br /> tert-Amyl Methyl Ether(TAME) ND - 0 500 ug/1 1 AC51507 15-Mar-05 16-Mar-05 EPA 82606 <br /> le Dibromoethane(EDB) ND 0 500 ug/I 1 AC51507 15-Mar-05 16-Mar-05 EPA 82608 <br /> 1,2-Dichloroethane 799 - 0 500 ug/I 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260E <br /> nzene 3800 - 0 500 ugll 1 AC51507 15-Mar-05 16-Mar-05 EPA 82606 <br /> (benzene 1190 - 0 500 ug/I 1 AC51507 15-Mar-05 16-Mar-05 EPA 82606 <br /> Toluene 4330 0 500 ug/1 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260B <br /> m,p Xylene 3300 - 0 500 ug/1 1 AC51507 15-Mar-05 16-Mar-05 EPA 82608 <br /> o-Xylene 3220 0 500 ug/1 1 AC51507 15-Mar-05 16-Mar-05 EPA 8260E <br /> Surrogate Toluene-d8 102% 70-125 <br /> Surrogate Dtbromofluoromethane 83% 70-125 <br /> ISurrogate 4-8romofluorobenzene 93% 70-125 <br /> mg/L=milligrams per Liter=ppm DLR=Detearon Limit forPurpose of Reporting <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limas <br /> "PECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 7743 N West Lane Suite B2 Stockton CA 95210 vhone (209) 477-8105 Fax (209) 477-8148 <br />