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' CALIFORNIA LABORATORY SERVICES <br />' 06/29/05 17 03 <br /> ENSR-Sacramento Project Stockton Scavenger Co CLS Work Order# COF0756 <br /> t10411 Old Placerville Rd, Suite 210 Project Number 05027-031-100 COC# <br /> Sacramento,CA 95827-2508 Project Manager Eric Chase <br /> Gas/BTEX by GC PID/FID - Quality Control <br /> 1 <br /> Reporting Spike Source %REC RPD <br />' Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C004824- EPA 5030 Water GC <br />' Matrix Spike Dup(CO04824-MSDI) Source COF0707-04 Prepared&Analyzed 06/22/05 <br /> Benzene 257 0 50 µg/L 20 0 48 104 60-140 1 16 30 <br /> Toluene 276 050 200 67 104 60-140 108 30 <br /> Ethylbenzene 580 050 200 39 950 60-140 0 345 30 <br />' Xylenes(total) 122 10 ,I 600 82 667 60-140 4 02 30 <br /> Surrogate o-Chlorotoluene(BTEX) 175 200 875 65-135 <br /> Batch C004827-EPA 5030 Water GC <br /> Blank(CO04827-BLKI) Prepared&Analyzed 06/23/05 <br /> Gasoline ND 50 µ81L <br /> W <br /> e ND 0 50 " <br /> e ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 10 <br /> Surrogate o-Chlorotoluene(BTEX) 200 200 100 65-135 <br /> Surrogate o-Chlorotoluene(Gas) 212 200 106 65-135 <br /> LCS(CO04827-BSI) Prepared&Analyzed 06/23/05 <br /> Gasoline 434 50 pg/L 500 868 65-135 <br /> Surrogate o-Chlorotoluene(Gas) 218 200 109 65-135 <br /> LCS Dup(CO04827-BSD1) Prepared&Analyzed 06/23/05 <br /> Gasoline 465 50 µg/L 500 93 0 65-135 690 30 <br /> Surrogate a-Chlorotoluene(Gas) 221 " 200 110 65-135 <br />` Matrix Spike(CO04827-MSI) Source COF0749-03 Prepared&Analyzed 06/23/05 _ <br /> Gasoline 419 50 µg/L 500 ND 83 8 65-135 <br /> Surrogate o-Chlorotoluene(Gas) 216 200 108 65-135 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 13249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab com 916-638-7301 Fax 916-638-4510 <br />