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Excelchem Laboratories, Inc. <br />Anc-on Environmental <br /> <br />Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 <br /> <br />Date Reported: <br />Lincoln, CA 95678 <br /> <br />Project Manager: Nolan Ryan 08/07/20 16:16 <br />Total Recoverable Metals - Quality Control <br />Analyte Result <br />Refionritiitng <br />Units <br />Spike Source %REC <br />Level Result %REC Limits RPD <br />RPD <br />Limit Notes <br />Batch AAG-0220 - EPA 6010B <br />LCS Dup (A^G0220-BSD1) Prepared: 07/27/20 Analyzed: 07/28/20 <br />Antimony 92.8 0.5 mg/kg 100 92.8 80-120 1.54 25 <br />Arsenic 92.4 0.5 100 92.4 80-120 1.11 25 <br />Barium 90.8 0.5 II 100 90.8 80-120 1.67 25 <br />Beryllium 90.8 0.5 II 100 90.8 80-120 1.37 25 <br />Cadmium 91.7 0.5 100 91.7 80-120 1.86 25 <br />Chromium 94.1 0.5 " 100 94.1 80-120 1.70 25 <br />Cobalt 93.9 0.5 100 93.9 80-120 1.78 25 <br />Copper 92.7 0.5 100 92.7 80-120 0.976 25 <br />Lead 93.9 0.5 100 93.9 80-120 1.85 25 <br />Molybdenum 94.2 0.5 100 94.2 80-120 1.62 25 <br />Nickel 92.4 0.5 100 92.4 80-120 1.40 25 <br />Selenium 88.5 0.5 ., 100 88.5 80-120 1.69 25 <br />Silver 93.3 0.5 100 93.3 80-120 2.04 25 <br />Thallium 92.1 0.5 U 100 92.1 80-120 1.87 25 <br />Vanadium 93.1 0.5 100 93.1 80-120 1.67 25 <br />Zinc 89.9 0.5 " 100 89.9 80-120 1.66 25 <br />Matrix Spike (AAG0220-MS1) Source: 2007152-01 Prepared: 07/27/20 Analyzed: 07/28/20 <br />Antimony 29.1 0.5 mg/kg 100 1.41 27.7 75-125 QM-01 <br />Arsenic 85.8 0.5 " 100 ND 85.8 75-125 <br />Barium 180 0.5 " 100 109 70.1 75-125 QM-01 <br />Beryllium 85.2 0.5 " 100 ND 85.2 75-125 <br />Cadmium 883 0.5 ., 100 ND 88.3 75-125 <br />Chromium 110 0.5 .. 100 22.5 87.9 75-125 <br />Cobalt 94.3 0.5 II 100 9.03 85.3 75-125 <br />Copper 99.8 0.5 ,, 100 12.3 87.5 75-125 <br />Lead 109 0.5 ., 100 17.0 92.4 75-125 <br />Molybdenum 82.1 0.5 " 100 ND 82.1 75-125 <br />Nickel 98.5 0.5 U 100 14.9 83.6 75-125 <br />Selenium 81.4 0.5 U 100 ND 81.4 75-125 <br />Silver 79.5 0.5 ., 100 ND 79.5 75-125 <br />Thallium 78.1 0.5 ., 100 ND 78.1 75-125 <br />Vanadium 139 0.5 ,i 100 50.5 88.1 75-125 <br />Zinc 117 0.5 U 100 35.7 80.9 75-125 <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 <br /> Page 11 of 18