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CALIFORNIA LABORATORY SERVICES <br /> Page 7 of 8 11/17/05 14 15 <br /> APEX Envirotech Inc -Gold River Project Flag City New West#1003 <br /> 11244 Pyrites Way Project Number NWPO1 004-RR CLS Work Order# COK0489 <br /> Gold River,CA 95670 Project Manager Jennifer Worsley COC# <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 C008671 -EPA 5030 Water MS <br /> Blank(CO08671-BLKI) Prepared&Analyzed 11/14/05 <br /> Di-isopropyl ether ND 050 lig/L <br /> Ethyl tert-butyl ether ND 050 " <br /> Methyl tert butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> Tert-butyl alcohol ND 5 0 " <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 10 " <br /> Surrogate Toluene d8 989 100 98 9 72-12S <br /> 49CS(CO08671-BSI) Prepared&Analyzed 11/14/05 <br /> Methyl tert butyl ether 229 0 50 µg/L 200 114 52-130 <br /> Surrogate Toluene-d8 103 100 103 72-125 <br /> LCS Dup(0008671-BSD1) Prepared&Analyzed 11/14/05 <br /> Methyl tert-butyl ether 224 050 Pg/L 200 112 52-130 221 30 <br /> Surrogate Toluene d8 983 100 983 72-125 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www callfornlalab com 916-638-7301 Fax 916-638-4510 <br />