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FRIEDMAN & BRUYA, INC. <br />_________________________________________________ <br />ENVIRONMENTAL CHEMISTS <br /> 6 <br /> <br />Date of Report: 08/27/25 <br />Date Received: 08/07/25 <br />Project: Cle Elum Transfer Station NWG0131, F&BI 508113 <br /> <br />QUALITY ASSURANCE RESULTS <br />FOR THE ANALYSIS OF SOIL SAMPLES <br />FOR TOTAL METALS USING EPA METHOD 6020B <br /> <br />Laboratory Code: 508110-01 (Matrix Spike) <br /> <br /> <br />Analyte <br /> <br />Reporting <br />Units <br /> <br />Spike <br />Level <br />Sample <br />Result <br />(Wet wt) <br />Percent <br />Recovery <br />MS <br />Percent <br />Recovery <br />MSD <br /> <br />Acceptance <br />Criteria <br /> <br />RPD <br />(Limit 20) <br />Arsenic mg/kg (ppm) 10 1.51 95 88 75-125 8 <br />Barium mg/kg (ppm) 50 37.3 96 b 91 b 75-125 5 b <br />Cadmium mg/kg (ppm) 10 <1 97 93 75-125 4 <br />Chromium mg/kg (ppm) 50 4.78 80 81 75-125 1 <br />Copper mg/kg (ppm) 50 10.9 77 b 73 b 75-125 5 b <br />Lead mg/kg (ppm) 50 9.31 89 85 75-125 5 <br />Mercury mg/kg (ppm 5 <1 93 92 75-125 1 <br />Nickel mg/kg (ppm) 25 3.02 78 77 75-125 1 <br />Selenium mg/kg (ppm) 5 <1 85 85 75-125 0 <br />Silver mg/kg (ppm) 10 <1 93 91 75-125 2 <br />Zinc mg/kg (ppm) 50 36.7 79 b 67 b 75-125 16 b <br /> <br /> <br />Laboratory Code: Laboratory Control Sample <br /> <br /> <br />Analyte <br /> <br />Reporting <br />Units <br /> <br />Spike <br />Level <br />Percent <br />Recovery <br />LCS <br /> <br />Acceptance <br />Criteria <br />Arsenic mg/kg (ppm) 10 94 80-120 <br />Barium mg/kg (ppm) 50 91 80-120 <br />Cadmium mg/kg (ppm) 10 96 80-120 <br />Chromium mg/kg (ppm) 50 93 80-120 <br />Copper mg/kg (ppm) 50 91 80-120 <br />Lead mg/kg (ppm) 50 90 80-120 <br />Mercury mg/kg (ppm) 5 98 80-120 <br />Nickel mg/kg (ppm) 25 92 80-120 <br />Selenium mg/kg (ppm) 5 91 80-120 <br />Silver mg/kg (ppm) 10 93 80-120 <br />Zinc mg/kg (ppm) 50 92 80-120 <br /> <br />