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0 CALIFORNIA LABORATORY SERVICES <br /> Page 9 of 10 12/09/05 10 19 <br /> APEX Envirotech Inc -Gold River Project Flag City New West#1003 <br /> 11244 Pyrites Way Project Number NWPO1 004 CLS Work Order# COL0003 <br /> Gold River,CA 95670 Project Manager Jennifer Worsley COC# 56262 <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 C009139-EPA 5030 Soil NIS <br /> Blank(CO09139-BLK1) Prepared&Analyzed 12/02/05 <br /> Di-isopropyl ether ND 50 µg/kg <br /> Ethyl tent butyl ether ND 50 " <br /> Methyl cert-butyl ether ND so " <br /> tert-Amyl methyl ether ND so " <br /> Teri-buty]alcohol ND 50 " <br /> Benzene ND 5 0 <br /> Ethylbenzene ND 50 " <br /> Toluene ND 5 0 " <br /> Xylenes(totai) ND 10 <br /> Surrogate Toluene-d8 SI 1 SD 0 102 60-140 <br /> S(C009139-BS1) Prepared&Analyzed 12/02/05 <br /> Methyl cert-butyl ether 60 3 5 0 iig/icg 50 0 121 60-140 <br /> Surrogate Toluene d8 52 5 500 105 60-140 <br /> LCS Dup(CO09139-BSDI) Prepared&Analyzed 12/02/05 <br /> Methyl tert-butyl ether 67 1 50 µg/kg 500 134 60-140 107 30 <br /> Surrogate Toluene-d8 526 " SOD 105 60-140 <br /> Matrix Spike(CO09139-MSI) Source COL0003-01 Prepared&Analyzed 12/02/05 <br /> Methyl tert butyl ether 64 4 5 0 pg/kg 500 ND 129 60-140 <br /> Surrogate Toluene-d8 503 500 101 60-140 <br /> Matrix Spike Dup(CO09139-MSDI) Source COL0003-01 Prepared&Analyzed 12/02/05 <br /> Methyl tent-butyl ether 63 2 50 µgAg Soo ND 126 60-140 188 30 <br /> Surrogate Toluene-d8 505 500 101 60-140 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www californialab cam 916-638-7301 Fax 916-638-4510 <br />