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Excelchem Laboratories, Inc. <br />Ancon Environmental <br />Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 <br />Date Reported: <br />Lincoln, CA 95678 <br />Project Manager: Nolan Ryan 08/07/20 16:16 <br />Total Recoverable Metals - Quality Control <br />Analyte Result <br />RTiomrtlitng <br />Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch AA G0229 - EPA 6010B <br />LCS (A A G0229-BS1) Prepared & Analyzed: 07/29/20 <br />Zinc 947 20.0 1000 94.7 80-120 <br />LCS Dup (AAG0229-BSD1) Prepared & Analyzed: 07/29/20 <br />Antimony 1000 10.0 1000 100 80-120 0.399 25 <br />Arsenic 1000 10.0 /I 1000 100 80-120 0.832 25 <br />Barium 946 5.0 1000 94.6 80-120 0.487 25 <br />Beryllium 974 1.0 1000 97.4 80-120 1.35 25 <br />Cadmium 1000 1.0 1000 100 80-120 0.802 25 <br />Chromium 996 5.0 1000 99.6 80-120 0.877 25 <br />Cobalt 1010 5.0 1000 101 80-120 0.909 25 <br />Copper 973 5.0 1000 97.3 80-120 1.17 25 <br />Lead 1020 5.0 1000 102 80-120 1.18 25 <br />Molybdenum 994 5.0 1000 99.4 80-120 0.707 25 <br />Nickel 990 5.0 1000 99.0 80-120 1.27 25 <br />Selenium 986 20.0 1000 98.6 80-120 0.457 25 <br />Silver 984 5.0 1000 98.4 80-120 0.417 25 <br />Thallium 1000 5.0 1000 100 80-120 0.931 25 <br />Vanadium 984 5.0 1000 98.4 80-120 1.77 25 <br />Zinc 967 20.0 1000 96.7 80-120 2.08 25 <br />Batch AAG0243 - EPA 7470A <br />Blank (AAG0243-BLK1) Prepared & Analyzed: 07/29/20 <br />Mercury 0.261 0.250 ugh B-03 <br />LCS (A^G0243-BS1) Prepared & Analyzed: 07/29/20 <br />Mercury 3.63 0.250 ugh 4.00 90.8 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 />-A. <br />Laboratory Representative <br /> Page 14 of 18