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CALIFORNIA LABORATORY SERVICES <br /> Page 8 of 9 11/07/05 15 11 <br /> APEX Envirotech Inc -Gold River Project Flag City New West##1003CLS Work Order# C031054 <br /> 11244 Pyntes Way Project Number NWP01 004 COC# 56260rd <br /> Gold River,CA 95670 Project Manager Jennifer Worsley <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 C008359-EPA 5030 Soil MS <br /> Blank(CO08359-BLKI) Prepared&Analyzed 11/02/05 <br /> Di-isopropyl ether ND 50 pg/kg <br /> Ethyl tert-butyl ether ND so " <br /> Methyl tert-butyl ether ND 50 " <br /> tert-Amyl methyl ether ND so " <br /> Tert butyl alcohol ND 50 <br /> Surrogate Toluene-d8 478 500 956 60-140 <br /> i <br /> LCS(CO08359-BS1) Prepared&Analyzed l 1/02105 <br /> Methyl tert butyl ether 41 1 50 pglkg Soo 822 60-140 <br /> Surrogate Toluene d8 486 Soo 971 60-140 <br /> S -up(CO08359-BSDI) Prepared&Analyzed 11/0.2_/0.5q11 _ <br /> '19ethyl tert butyl ether 457 50 µglkg 500 914 60-140 106 30 <br /> Surrogate Toluene-d8 482 " 500 964 60-140 <br /> Matrix Spike(CO08359-MS1) Source COK0058-05 Prepared&Analyzed 11/02/05 <br /> Methyl tert-butyl ether 489 50 pg/kg 500 ND 976 60-140 <br /> Surrogate Toluene-d8 477 1300 954 60-140 <br /> Matrix Spike Dup(CO08359-MSD1) Source COK0058-05 Prepared&Analyzed 11/02/05 <br /> Methyl tert butyl ether 476 50 pg/kg 500 ND 952 60-140 249 30 <br /> Surrogate Toluene-d8 477 500 954 60-140 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www californialab coni 916-638-7301 Fax 916-638-4510 <br />