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CALIFORNIALABORATORY SERVICES <br /> e <br /> 09/29/04 13 30 ' <br /> ENSR-Sacramento Project Former Unocal 5098,5606c U gto ktr 'o <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-100 °r4 Ome0746 <br /> COC# 41080 <br /> Sacramento,CA 95827-2508 Project Manager Ben I Hemngburg - <br /> CAM 17 Metals - Quality Contras <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN07366-EPA 7470A <br /> Blank(CN07366-BLKI) Prepared&Analyzed 09/23/04 ' <br /> Mercury ND 020 pg/L <br /> LCS(CN07366-BSI) Prepared&Analyzed 09/23/04 <br /> Mercury 622 020 pg/L 500 124 75-125 <br /> LCS Dup(CN07366-BSD1) Prepared&Analyzed 09/23/04 <br /> Mercury 5 16 020 gg/L 500 103 75-125 186 25 <br /> Matrix Spike(CN07366-MSI) Source CNI0746-01 Prepared&Analyzed 09/23/04 <br /> Mercury 479 020 pg/L 500 00 95 8 75-125 <br /> Matrix Spike Dup(CN07366-MSD1) Source CNIO746-01 Prepared&Analyzed 09/23/04 <br /> Mercury 553 020 pg/L Soo 00 111 75-125 143 25 <br /> Batch CN07369-EPA 3020A <br /> Blank(CN07369-BLK1) Prepared 09/23/04 Analyzed 09/24/04 <br /> Arsenic ND 5 fl=pg/L <br /> Lead ND 5 0 " <br /> Selenium ND�5 0�" - - <br />- Thallturn ND 10 " <br /> LCS(CN07369-BS1) Prepared 09/23/04 Analyzed 09/24/04 <br /> Arsenic 958 50 gg/L 100 958 80-120 <br /> _Lead 975 50 100 975 80-120 <br />- W Selenium - 920 so W _ - 100 - 920 80-120 <br /> Thallium 971 10 100 971 80-120 ' <br /> Cadmium 903 50 100 903 80-120 <br /> Chromium 970 5 0 100 970 80-120 <br /> Copper 899 50 100 899 80-120 <br /> Nickel 922 50 100 922 80-120 <br /> Zinc 904 10 100 904 80-120 <br /> i <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgcrald Road Rancho Cordova, CA 95742 www californialab com 916-638-7301 Fax 916-638-4510 ' <br />