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1 <br /> CALIFORNIA LABORATORY SERVICES <br /> Page 9 of 10 11/21/05 11 46 <br /> APEX Envirotech Inc -Gold River Project Flag City New West#1003 <br /> 11244 Pyrites Way Project Number NW P01 004 CLS Work Order# COK0467 <br /> Gold River,CA 95670 Project Manager Jennifer Worsley COC# 53562 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C008710- EPA 5030 Soil MS <br /> Blank(CO08710-BLKI) Prepared&Analyzed 11/15/05 <br /> Di-isopropyl ether ND 50 µg/kg <br /> Ethyl tert-butyl ether ND 50 " <br /> Methyl tert-butyl ether ND 50 " <br /> tert-Amyl methyl ether ND 50 " <br /> Tert butyl alcohol ND 50 " <br /> Surrogate Toluene-d8 498 500 996 60-140 <br /> LCS(CO08710-BSI) Prepared&Analyzed 11/15/05 <br /> Methyl tert-butyl ether 51 6 50 }µg/kg 500 103 60-140 <br /> Surrogate Toluene d8 514 500 103 60-140 <br /> WS Dup(CO08710-BSDI) Prepared&Analyzed 11115105 <br /> '"OPFAethyl tert-butyl ether 565 50 µg/kg 500 113 60-140 907 30 <br /> Surrogate Toluene d8 511 500 102 60-140 <br /> Matrix Spike(CO08710-MSI) Source COK0467-03 Prepared&Analyzed 11/15/05 <br /> Methyl cert-butyl ether 499 50 pg/kg 500 ND 998 60-140 <br /> Surrogate Toluene-d8 494 500 988 60-140 <br /> Matrix Spike Dup(CO08710-MSD1) Source COK0467-03 Prepared&Analyzed 11/15/05 <br /> Methyl tert-butyl ether 513 50 µg/kg 500 ND 103 60 140 277 30 <br /> Surrogate Toluene-0 498 500 996 60-140 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www californlalab corn 916-638-7301 Fax 916-6384510 <br /> i <br />