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CALIFORNIA LABORATORY SERVICES <br /> 11/05/04 15 09 <br /> ENSR-Sacramento Project Former Unocal 5098,5606 agf Aorvk RrOS 79 J 0 8 8 3 <br />' 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-100 COC# None <br /> Sacramento,CA 95827-2508 Project Manager Ben I Henmgburg <br /> CAM 17 Metals - Quality Control <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN08302-EPA 3020A <br /> LCS Dup(CN08302-BSDI) Prepared&Analyzed 10/26/04 <br /> Arsenic 905 50 µg/L 100 905 80-120 745 20 <br /> Lead 842 50 11100 842 80-120 803 20 <br /> Selenium 852 so " 100 852 80-120 3 83 20 <br /> Thallium 855 10 100 855 80-120 892 20 <br /> Matrix Spike(CN08302-MS1) Source CNJO876-01 Prepared&Analyzed 10/26/04 <br /> Arsenic 85 5 50 pg/L 100 ND 855 75-125 <br /> Lead 802 50 100 ND 802 75-125 <br /> Selenium 813 50 100 ND 813 75-125 <br /> Thalhum 811 10 100 ND 811 75-125 <br /> Six Spike Dup(CN08302-MSD1) Source CNJO876-01 Prepared&Analyzed 10/26/04 <br /> Arsenic 85 8 50 pg/L 100 ND 85 8 75-125 0 350 25 <br /> Lead 820 50 100 ND 820 75-125 222 25 <br /> Selenium 809 50 100 ND 809 75-125 0 493 25 <br /> Thallium 826 10 100 ND 826 75-125 1 83 25 <br /> Batch CN08303-EPA 3010A <br /> Blank(CN08303-BLK1) Prepared&Analyzed 10/26/04 <br /> Antimony ND 50 pg/L <br />' Barium ND 20 <br /> Beryllium ND 50 <br /> Cadmium ND 10 <br /> ICobalt ND 20 "Chromium ND 20 " <br /> Copper ND 20 <br /> Molybdenum ND 20 " <br /> Nickel ND 20 <br /> Silver ND 10 " <br /> Vanadium ND 20 " <br /> 7inr ND 20 <br /> M <br /> a <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 />