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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/10/2026 15:35 <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: B227026 Used client sample: Y-Description: AMW-22, 02/09/2026 09:13 <br /> Dissolved Aluminum DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 983.47 1020.4 ug/L 96.4 75-125 2 <br /> MSD 2602031-01 ND 988.67 1020.4 ug/L 0.5 96.9 20 75-125 3 <br /> Dissolved Antimony DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 369.59 408.16 ug/L 90.6 75-125 2 <br /> MSD 2602031-01 ND 367.65 408.16 ug/L 0.5 90.1 20 75-125 3 <br /> Dissolved Arsenic DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 194.08 204.08 ug/L 95.1 75-125 2 <br /> MSD 2602031-01 ND 192.86 204.08 ug/L 0.6 94.5 20 75-125 3 <br /> Dissolved Barium DUP 2602031-01 249.70 249.70 ug/L 0 20 1 <br /> MS 2602031-01 249.70 643.88 408.16 ug/L 96.6 75-125 2 <br /> MSD 2602031-01 249.70 643.57 408.16 ug/L 0.0 96.5 20 75-125 3 <br /> Dissolved Beryllium DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 183.18 204.08 ug/L 89.8 75-125 2 <br /> MSD 2602031-01 ND 184.50 204.08 ug/L 0.7 90.4 20 75-125 3 <br /> Dissolved Cadmium DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 187.14 204.08 ug/L 91.7 75-125 2 <br /> MSD 2602031-01 ND 188.57 204.08 ug/L 0.8 92.4 20 75-125 3 <br /> Dissolved Chromium DUP 2602031-01 2.3000 2.4000 ug/L 4.3 20 J 1 <br /> MS 2602031-01 2.3000 186.22 204.08 ug/L 90.1 75-125 2 <br /> MSD 2602031-01 2.3000 187.24 204.08 ug/L 0.5 90.6 20 75-125 3 <br /> Dissolved Cobalt DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 183.88 204.08 ug/L 90.1 75-125 2 <br /> MSD 2602031-01 ND 183.88 204.08 ug/L 0 90.1 20 75-125 3 <br /> Dissolved Copper DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 354.08 408.16 ug/L 86.8 75-125 2 <br /> MSD 2602031-01 ND 356.22 408.16 ug/L 0.6 87.3 20 75-125 3 <br /> Dissolved Iron DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 993.67 1020.4 ug/L 97.4 75-125 2 <br /> MSD 2602031-01 ND 1002.6 1020.4 ug/L 0.9 98.2 20 75-125 3 <br /> Dissolved Lead DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 366.63 408.16 ug/L 89.8 75-125 2 <br /> MSD 2602031-01 ND 366.53 408.16 ug/L 0.0 89.8 20 75-125 3 <br /> Dissolved Manganese DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 501.94 510.20 ug/L 98.4 75-125 2 <br /> MSD 2602031-01 ND 503.47 510.20 ug/L 0.3 98.7 20 75-125 3 <br /> Dissolved Molybdenum DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 184.49 204.08 ug/L 90.4 75-125 2 <br /> MSD 2602031-01 ND 186.12 204.08 ug/L 0.9 91.2 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: 1001665034 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 144 of 147 <br />