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qp CALIFORNIA LABORATORY SERVICES <br /> 08/17/05 13 02 <br /> APEX Envirotech Inc -Gold River Project Cohn Property CLS Work Order# COH0357 <br /> 1244 Pyntes Way Project Number COH01 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 /> I <br /> Batch C006080- EPA 5030 Water GC <br /> Blank(CO06080-BLKI) Prepared&Analyzed 08/11/05 <br /> Gasoline ND 50 µglL <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethytbenzene ND 0 50 " <br /> Xylenes(total) ND 1 0 " <br /> Surrogate o-Chlorololuene(BTEX) 193 200 965 65-135 <br /> Surrogate o-Chlorotoluene(Cas) 195 200 975 65-135 <br /> LCS(CO06080-BS1) Prepared&Analyzed 08/11/05 <br /> Benzene 21 0 0 50 lig/L 200 105 70-140 <br /> oluene 208 0 50 200 104 70-140 <br /> thylbenzene 2l 6 0 50 20 0 108 70-140 <br /> Xylenes(total) 61 6 l 0 600 103 70-140 <br /> Surrogate o-Chlorotoluene(BTEX) 19 2 200 96 0 65-135 <br /> LCS Dup(CO06080-BSDI) Prepared&Analyzed 08/11/05 <br /> Benzene 195 0 50 µg/L 20 0 97 5 70-140 741 30 <br /> Toluene 21 8 0 50 200 109 70-140 4 69 30 <br /> Ethylbenzene 22 7 050 200 114 70 140 4 97 30 <br /> Xylenes(total) 675 1 0 60 0 112 70 140 9 14 30 <br /> Surrogate o Chlorotoluene(BTEX) 19 7 200 98 5 65 135 <br /> Matrix Spike(CO06080-MSI) Source COH0357-05 Prepared&Analyzed 08/11/05 <br /> Benzene 366 050 lig/L 200 34 13 0 60-140 QM-11 <br /> Toluene 300 050 200 8 I 110 60-140 <br /> Ethylbenzene 227 0 50 200 ND 114 60-140 <br /> Xytenes(total) 67 7 1 0 600 23 109 60-140 <br /> Surrogate o Chlorotoluene(BTEX) 192 200 960 65-135 <br /> 0— <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www caltforntalab com 916-638-7301 Fax 916-638-4510 <br />