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4p CALIFORNIA LABORATORY SERVICES <br /> 08/17/05 13 02 <br /> APEX Envirotech Inc -Gold River Project Cohn Property <br /> CLS Work Order# COH6357 <br /> 11244 Pyrites Way Project Number COHO1 001 <br /> Gold River,CA 95670 Project Manager Drew Van Allen <br /> Gas/BTEX by GC PIDIFID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C006080- EPA 5030 Water GC <br /> Matrix Spike D u p(CO06080-MSD1) Source COH0357-05 Prepared&Analyzed 08/11/05 <br /> Benzene 34 1 0 50 µg/L 200 34 0 500 60-140 7 07 30 QM-1 1 <br /> Toluene 289 050 200 8 1 104 60-140 374 30 <br /> Ethylbenzene 22 2 0 50 200 ND ill 60-140 2 23 30 <br /> Xylenes(total) 641 10 600 2 3 103 60-140 546 30 <br /> Surrogate o-Chlorotoluene(BTEA) 188 200 940 65-135 <br /> 0- <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab com 916-638-7301 Fax 916-638-4510 <br />