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PRECISION <br />ENVIRO-T-TECH <br />Analytical Laboratory CERTIFICATE OF ANALYSIS <br />Wednesday, May 18, 2005 <br />Attention: Lovie Mendez <br />Dillon & Murphy Report Page 3of5 <br />P.O. BOX 2180 <br />Lodi, CA 95241 <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 AE51702 - Solvent Extraction <br />Blank (AE51702-BLKI) Prepared & Analyzed: 17 -May -05 <br />1,2-Dibromo-3-ehioropropane ND 0.0200 us/1 <br />t" 1,2-Dibromoethane(EDB) ND 0.0100 " <br />LCS (AE51702-191SI) Prepared & Analyzed: 17 -May -05 <br />1 Dibromo-3chloropropane 0.147 0.0200 ug/1 0.147 100 75-125 <br />1,2-13ibromoethane (EDB) 0.141 0.0100 0.147 96 75-125 <br />Matrix Spike (AE51702-MSI) Source: 5051601-01 Prepared & Analyzed: 17 -May -05 <br />1,2-Dibromo-3-ehloropropane 0.259 0.0200 ug/I 0.147 0.131 87 75-125 <br />1,2-Dibromoethane (EDB) 0.170 0.0100 " 0.147 ND 116 75-125 <br />Matrix Spike Dup (AE51702-MSDI) Source: 5051601-01 Prepared & Analyzed: 17 -May -05 <br />1,2-Dibromo-3thloropropane 0.274 0.0200 ug/l 0.147 0.131 97 75-125 6 20 <br />r_ 1,2-Dibromoethane (EDB) 0.156 0.0100 0.147 ND 106 75-125 9 20 <br />r <br />V <br />V <br />L <br />L <br />mg L - mdhgrams per Grey - ppm <br />ug:. ` m¢rograms per l ier = pp[ <br />RESPECTFULLY SUBMITTED, <br />L <�A� <br />DLR = lk'wamn limit MN'urpus� o/Reponmc. <br />Excepnonal sample mavrees ar mani•rences mac <br />n,ulf m higher derecunn h.m <br />i Jonathan Le, Laboratory Director <br />L 774-,N ld'e.v;;a;? .SuimB- .Stockton (A 9521U phone -009)-;---R105 Fu:."C09/ 8148 <br />