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Excelchem Laboratories, Inc. <br />Ancon Environmental <br /> <br />Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 Date Reported: <br />Lincoln, CA 95678 Project Manager: Nolan Ryan 08/07/20 16:16 <br />Total Recoverable Metals - Quality Control <br />Analyte Result <br />Refort tng <br />Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch AAG0224 - EPA 7471A <br />Matrix Spike (AAG0224-MS1) Source: 2007152-01 Prepared: 07/27/20 Analyzed: 07/28/20 <br />Mercury <br />Matrix Spike Dup (AAG0224-MSDI) <br />0.234 0.016 <br />Source: 2007152-01 <br />mg/kg 0.200 0.0209 106 75-125 <br />Prepared: 07/27/20 Analyzed: 07/28/20 <br />Mercury 0.224 0.016 mg,/kg 0.200 0.0209 102 75-125 4.20 20 <br />Batch AAG0229 - EPA 6010B <br />Blank (AAG0229-BLK1) Prepared & Analyzed: 07/29/20 <br />Antimony ND 10.0 u811 <br />Arsenic ND 10.0 /1 <br />Barium ND 5.0 <br />Beryllium ND 1.0 <br />Cadmium ND 1.0 11 <br />Chromium ND 5.0 <br />Cobalt ND 5.0 /1 <br />Copper ND 5.0 <br />Lead ND 5.0 11 <br />Molybdenum ND 5.0 <br />Nickel ND 5.0 /1 <br />Selenium ND 20.0 <br />Silver ND 5.0 <br />Thallium ND 5.0 <br />Vanadium ND 5.0 /I <br />Zinc ND 20.0 <br />LCS (AAG0229-BSI) Prepared & Analyzed: 07/29/20 <br />Antimony 1000 10.0 ug/1 1000 100 80-120 <br />Arsenic 994 10.0 /1 1000 99.4 80-120 <br />Barium 942 5.0 1000 94.2 80-120 <br />Beryllium 961 1.0 1000 96.1 80-120 <br />Cadmium 994 1.0 " 1000 99.4 80-120 <br />Chromium 988 5.0 1000 98.8 80-120 <br />Cobalt 997 5.0 1000 99.7 80-120 <br />Copper 962 5.0 1000 962 80-120 <br />Lead 1010 5.0 1000 101 80-120 <br />Molybdenum 987 5.0 1000 98.7 80-120 <br />Nickel 977 5.0 1000 97.7 80-120 <br />Selenium 982 20.0 1000 982 80-120 <br />Silver 980 5.0 1000 98.0 80-120 <br />Thallium 995 5.0 ,, 1000 99.5 80-120 <br />Vanadium 966 5.0 11 1000 96.6 80-120 <br />Excelchem Laboratories. Inc. The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br /> <br />Laboratory Representative Page 13 of 18