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CALIFORNIA LABORATORY SERVICES <br /> a 07/11/05 12 21 <br /> APEX Envirotech Inc -Gold River Project Cohn Property CLS Work Order# COG0009 <br /> 11244 Pyrites Way Project Number COI-101 001 COC 4 <br /> Gold River,CA 95670 Project Manager Drew Van Allen <br /> Gas/BTEX by GC PID/FID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch C005162-EPA 5030 Water GC <br /> LCS(CO05162-BSI) Prepared&Analyzed 07/07/05 <br /> Benzene 218 050 pg/L 200 109 70-140 <br /> Toluene 21 0 050 200 105 70-140 <br /> Ethylbenzene 21 1 050 200 106 70-140 <br /> Xylenes(total) 66 1 1 0 600 110 70 140 <br /> Surrogate o-Chlorotoluene(BTEX) 190 200 95 0 65-135 <br /> LCS Dup(CO05162-BSD1) Prepared&Analyzed 07/07/05 <br /> Benzene 220 050 µg/L 200 110 70 140 0 913 30 <br /> Toluene 21 6 050 200 108 70 140 2 82 30 <br /> *thylbenzene 21 7 050 200 108 70 140 280 30 <br /> ylenes(total) 673 1 0 600 112 70 140 1 80 30 <br /> Surrogate o-Chlorotoluene(BTEX) 197 200 98 5 65-135 <br /> Matrix Spike(CO05162-MS1) Source C000133-02 Prepared&Analyzed 07/07/05 <br /> Benzene 222 0 50 pg/L 20 0 ND 1H 60-140 <br /> Toluene 21 5 0 50 200 ND 108 60-140 <br /> Ethylbenzene 21 4 0 50 200 ND 107 60-140 <br /> Xylenes(total) 489 1 0 600 ND 81 5 60-140 <br /> Surrogate o-Chlorotoluene(BTEX) 195 200 975 65-135 <br /> Matrix Spike Dup(CO05162-MSD1) Source COG0133-02 Prepared&Analyzed 07/07/05 <br /> Benzene 21 6 050 pg/L 200 ND 108 60 140 2 74 30 <br /> Toluene 207 050 200 ND 104 60-140 379 30 <br /> Ethylbenzene 207 050 200 ND 104 60 140 333 30 <br /> Xylenes(total) 389 1 0 600 ND 648 60-140 22 8 30 <br /> Surrogate o-Chlorwoluene(BTEX) 200 200 100 65-135 <br /> 40 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www calkfornialab com 916-638-7301 Fax 916-638-4510 <br />