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PRECISION <br /> ENVIRO-TECr4 `O� <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Monday,April 25, 2005 <br /> Attention: Abigail <br /> Neil O.Anderson & Associate Report Page 3 of <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> EDB and DBCP by EPA Method 504.1 - Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AD52123-Solvent Extraction <br /> Blank(AD52123-BLKI) Prepared&Analyzed:21-Apr-05 <br /> 1,2-Dibromo-3-chloropropane ND 0.0200 ug/1 <br /> r 1,2-Dibromoethane(EDB) ND 0.0100 " <br /> LCS(AD52123-BSI) Prepared&Analyzed:21-Apr-05 <br /> 1,2-Dibromo-3-chloropropane 0.242 0.0200 ugA 0.294 82 75-125 <br /> r 1,2-Dibromoethane(EDB) 0.320 0.0100 1. 0.294 109 75-125 <br /> Matrix Spike(AD52123-MS1) Source:5042113-01 Prepared&Analyzed:21-Apr-05 <br /> 1,2-Dibromo 3-chloropropane 0.329 0.0200 ug/1 0.294 ND 112 75-125 <br /> b1,2-Dibromoethane(EDB) 0.313 0.0100 1. 0.294 ND 106 75-125 <br /> Matrix Spike Dup(AD52123-MSD1) Source:5042113-01 Prepared&Analyzed:21-Apr-05 <br /> 1,2-Dibromo-3-chloropropane 0.283 0.0200 ug/1 0.294 ND 96 75-125 15 20 <br /> 1,2-Dibromoethane(EDB) 0.283 0.0100 0.294 ND 96 75-125 10 20 <br /> ✓r <br /> V. <br /> L <br /> L <br /> r <br /> mg,L-milligramsperLiter=ppm DLR=Detection Ltm¢forPurpose ofRepaning. <br /> ugh=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> ]RESPECTFULLY SUB1vII"1'TED, <br /> r � ` <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 !/ <br />