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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 FWD Unit 30167676.01 <br />Ari Terry <br />Reported:02/19/2024 14:08 <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: Y - Description: D-93/95, 02/02/2024 13:20 <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: B183620 Used client sample: N <br />Dissolved Mercury DUP ND 20ND2401936-03 ug/L 4 <br />MS 0.88000 70 - 130ND1.0000 88.02401936-03 ug/L 5 <br />MSD 0.87500 0.6 20 70 - 130ND1.0000 87.52401936-03 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: B183659 Used client sample: N <br />Dissolved Aluminum DUP 132.22 20ND J2402016-07 ug/L 10 <br />MS 4888.6 75 - 125ND5102.0 95.82402016-07 ug/L 11 <br />MSD 5076.0 3.8 20 75 - 125ND5102.0 99.52402016-07 ug/L 12 <br />Dissolved Antimony DUP 56.837 8.7 2061.986 J2402016-07 ug/L 10 <br />MS 1840.5 75 - 12561.986 2040.8 87.12402016-07 ug/L 11 <br />MSD 1790.5 2.8 20 75 - 12561.986 2040.8 84.72402016-07 ug/L 12 <br />Dissolved Arsenic DUP 61.278 20ND J2402016-07 ug/L 10 <br />MS 1172.0 75 - 125ND1020.4 1152402016-07 ug/L 11 <br />MSD 1189.4 1.5 20 75 - 125ND1020.4 1172402016-07 ug/L 12 <br />Dissolved Barium DUP 3101.3 2.4 203026.82402016-07 ug/L 10 <br />MS 5049.6 75 - 1253026.8 2040.8 99.12402016-07 ug/L 11 <br />MSD 5084.0 0.7 20 75 - 1253026.8 2040.8 1012402016-07 ug/L 12 <br />Dissolved Beryllium DUP ND 203.90402402016-07 ug/L 10 <br />MS 1047.1 75 - 1253.9040 1020.4 1022402016-07 ug/L 11 <br />MSD 1046.9 0.0 20 75 - 1253.9040 1020.4 1022402016-07 ug/L 12 <br />Dissolved Cadmium DUP ND 20ND2402016-07 ug/L 10 <br />MS 1063.0 75 - 125ND1020.4 1042402016-07 ug/L 11 <br />MSD 1034.0 2.8 20 75 - 125ND1020.4 1012402016-07 ug/L 12 <br />Dissolved Chromium DUP 11.795 5.2 2012.426 J2402016-07 ug/L 10 <br />MS 1114.2 75 - 12512.426 1020.4 1082402016-07 ug/L 11 <br />MSD 1089.6 2.2 20 75 - 12512.426 1020.4 1062402016-07 ug/L 12 <br />Dissolved Cobalt DUP 10.528 18.1 208.7835 J2402016-07 ug/L 10 <br />MS 1114.7 75 - 1258.7835 1020.4 1082402016-07 ug/L 11 <br />MSD 1086.9 2.5 20 75 - 1258.7835 1020.4 1062402016-07 ug/L 12 <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 79 of 99Report ID: 1001490723