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4� al <br /> CALIFORNIA LABORATORY SERVICES <br /> 07/11/05 12 21 <br /> APEX Envirotech Inc -Gold River Project Cohn Property CLS R'ork Order# COG0009 <br /> 11244 Pyrites Way Project Number COHO1 001 COC# <br /> Gold River,CA 95670 Project Manager Drew Van Allen <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 C005071 -EPA 5030 Water NIS <br /> Blank(CO05071-BLKI) Prepared&Analyzed 07/06/05 <br /> Di-isopropyl ether ND 050 lrg/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 /> Surrogate Toluene d8 995 100 99 5 72-125 <br /> LCS(CO05071-BSI) Prepared&Analyzed 07/06/05 <br /> Methyl tert-butyl ether 180 050 gg/L 200 900 52-130 <br /> 40rrrogate Toluene-d8 999 10 0 999 72-125 <br /> LCS Dup(CO05071-BSD1) Prepared&Analyzed 07/06/05 <br /> Methyl tert-butyl ether 21 0 0 50 µg/L 200 105 52-130 15 4 30 <br /> Surrogate Toluene-d8 995 100 99 5 72 125 <br /> Batch C005076-EPA 5030 Water NIS <br /> Blank(CO05076-BLKI) Prepared&Analyzed 07/06/05 <br /> Di-isopropyl ether ND 050 pg/L <br /> Ethyl tert butyl ether ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 0 50 " <br /> Tert-butyl alcohol ND 5 0 " <br /> Surrogate Toluene d8 290 300 967 72-125 <br /> LCS(CO05076-BS1) Prepared&Analyzed 07/06/05 <br /> Methyl tert-butyl ether 21 6 050 pg/L 200 108 52-130 <br /> Surrogate Toluene-d8 292 300 973 72-125 <br /> 0 <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 />