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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 11:37 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 <br /> Project Manager: Dalia Rumani <br /> Metals Analysis <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent Lab <br /> Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals R# <br /> QC Batch ID: B227024 Used client sample: N <br /> Dissolved Aluminum DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 1019.2 1020.4 ug/L 99.9 75-125 2 <br /> MSD 2601989-01 ND 1020.7 1020.4 ug/L 0.2 100 20 75-125 3 <br /> Dissolved Antimony DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 430.41 408.16 ug/L 105 75-125 2 <br /> MSD 2601989-01 ND 435.51 408.16 ug/L 1.2 107 20 75-125 3 <br /> Dissolved Arsenic DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 229.39 204.08 ug/L 112 75-125 2 <br /> MSD 2601989-01 ND 231.02 204.08 ug/L 0.7 113 20 75-125 3 <br /> Dissolved Barium DUP 2601989-01 327.30 328.70 ug/L 0.4 20 1 <br /> MS 2601989-01 327.30 736.53 408.16 ug/L 100 75-125 2 <br /> MSD 2601989-01 327.30 737.24 408.16 ug/L 0.1 100 20 75-125 3 <br /> Dissolved Beryllium DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 219.80 204.08 ug/L 108 75-125 2 <br /> MSD 2601989-01 ND 219.97 204.08 ug/L 0.1 108 20 75-125 3 <br /> Dissolved Cadmium DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 224.90 204.08 ug/L 110 75-125 2 <br /> MSD 2601989-01 ND 225.00 204.08 ug/L 0.0 110 20 75-125 3 <br /> Dissolved Chromium DUP 2601989-01 1.9000 1.7000 ug/L 11.1 20 J 1 <br /> MS 2601989-01 1.9000 221.02 204.08 ug/L 107 75-125 2 <br /> MSD 2601989-01 1.9000 221.73 204.08 ug/L 0.3 108 20 75-125 3 <br /> Dissolved Cobalt DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 219.49 204.08 ug/L 108 75-125 2 <br /> MSD 2601989-01 ND 219.08 204.08 ug/L 0.2 107 20 75-125 3 <br /> Dissolved Copper DUP 2601989-01 1.4000 1.6000 ug/L 13.3 20 J 1 <br /> MS 2601989-01 1.4000 428.98 408.16 ug/L 105 75-125 2 <br /> MSD 2601989-01 1.4000 428.47 408.16 ug/L 0.1 105 20 75-125 3 <br /> Dissolved Iron DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 1009.2 1020.4 ug/L 98.9 75-125 2 <br /> MSD 2601989-01 ND 1010.3 1020.4 ug/L 0.1 99.0 20 75-125 3 <br /> Dissolved Lead DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 435.20 408.16 ug/L 107 75-125 2 <br /> MSD 2601989-01 ND 435.10 408.16 ug/L 0.0 107 20 75-125 3 <br /> Dissolved Manganese DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 517.96 510.20 ug/L 102 75-125 2 <br /> MSD 2601989-01 ND 518.78 510.20 ug/L 0.2 102 20 75-125 3 <br /> Dissolved Molybdenum DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 202.35 204.08 ug/L 99.2 75-125 2 <br /> MSD 2601989-01 ND 204.80 204.08 ug/L 1.2 100 20 75-125 3 <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 /> Report ID: 1001665326 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 41 of 44 <br />