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Arcadis- SLO <br />4119 Broad Street Suite 210 <br />San Luis Obispo, CA 93401 <br />Project: <br />Project Number: <br />Project Manager: <br />Forward Landfill <br />1Q24 Austin Unit 30167676.01 <br />Ari Terry <br />Reported:02/28/2024 11:01 <br />Quality Control Report - Precision & Accuracy <br />Constituent Sample IDType Result Result Added Units RPD Recovery RPD Recovery Quals <br />Source Spike Percent Percent <br />Control Limits <br />Metals Analysis <br />Source Lab <br />R# <br />QC Batch ID: B183538 Used client sample: N <br />Hexavalent Chromium DUP 0.28330 1.9 100.278102402125-02 ug/L 1 <br />MS 19.215 90 - 1100.27810 20.202 93.72402125-02 ug/L 2 <br />MSD 19.177 0.2 10 90 - 1100.27810 20.202 93.52402125-02 ug/L 3 <br />QC Batch ID: B183539 Used client sample: N <br />Hexavalent Chromium DUP 0.82190 0.9 100.829502402178-03 ug/L 4 <br />MS 19.707 90 - 1100.82950 20.202 93.42402178-03 ug/L 5 <br />MSD 19.673 0.2 10 90 - 1100.82950 20.202 93.32402178-03 ug/L 6 <br />QC Batch ID: B183621 Used client sample: N <br />Dissolved Mercury DUP 0.030250 13.1 200.034500 J2402144-01 ug/L 7 <br />MS 0.97500 70 - 1300.034500 1.0000 94.02402144-01 ug/L 8 <br />MSD 0.96000 1.6 20 70 - 1300.034500 1.0000 92.62402144-01 ug/L 9 <br />QC Batch ID: B183661 Used client sample: Y - Description: FU-03, 02/02/2024 12:33 <br />Dissolved Aluminum DUP ND 20ND2402126-01 ug/L 10 <br />MS 1064.1 75 - 125ND1020.4 1042402126-01 ug/L 11 <br />MSD 1109.0 4.1 20 75 - 125ND1020.4 1092402126-01 ug/L 12 <br />Dissolved Antimony DUP ND 209.94942402126-01 ug/L 13 <br />MS 276.35 75 - 1259.9494 408.16 65.3 Q032402126-01 ug/L 14 <br />MSD 289.16 4.5 20 75 - 1259.9494 408.16 68.4 Q032402126-01 ug/L 15 <br />Dissolved Arsenic DUP ND 20ND2402126-01 ug/L 13 <br />MS 197.92 75 - 125ND204.08 97.02402126-01 ug/L 14 <br />MSD 202.28 2.2 20 75 - 125ND204.08 99.12402126-01 ug/L 15 <br />Dissolved Barium DUP 5173.4 0.6 205203.62402126-01 ug/L 13 <br />MS 5693.5 75 - 1255203.6 408.16 1202402126-01 ug/L 14 <br />MSD 5600.7 1.6 20 75 - 1255203.6 408.16 97.32402126-01 ug/L 15 <br />Dissolved Beryllium DUP ND 20ND2402126-01 ug/L 13 <br />MS 211.09 75 - 125ND204.08 1032402126-01 ug/L 14 <br />MSD 216.17 2.4 20 75 - 125ND204.08 1062402126-01 ug/L 15 <br />Dissolved Cadmium DUP ND 20ND2402126-01 ug/L 13 <br />MS 209.81 75 - 125ND204.08 1032402126-01 ug/L 14 <br />MSD 213.80 1.9 20 75 - 125ND204.08 1052402126-01 ug/L 15 <br />Dissolved Chromium DUP 2.7947 12.1 202.4755 J2402126-01 ug/L 13 <br />MS 223.34 75 - 1252.4755 204.08 1082402126-01 ug/L 14 <br />MSD 226.04 1.2 20 75 - 1252.4755 204.08 1102402126-01 ug/L 15 <br />Dissolved Cobalt DUP ND 20ND2402126-01 ug/L 13 <br />MS 210.78 75 - 125ND204.08 1032402126-01 ug/L 14 <br />MSD 215.69 2.3 20 75 - 125ND204.08 1062402126-01 ug/L 15 <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document . This analytical report must be reproduced in its entirety . <br />All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration , separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 77 of 97Report ID: 1001492876