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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:42 <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: B227109 Used client sample: N <br /> Dissolved Aluminum DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 1073.4 1020.4 ug/L 105 75-125 2 <br /> MSD 2602102-05 ND 1067.0 1020.4 ug/L 0.6 105 20 75-125 3 <br /> Dissolved Antimony DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 378.98 408.16 ug/L 92.9 75-125 2 <br /> MSD 2602102-05 ND 380.71 408.16 ug/L 0.5 93.3 20 75-125 3 <br /> Dissolved Arsenic DUP 2602102-05 14.600 15.100 ug/L 3.4 20 J 1 <br /> MS 2602102-05 14.600 208.88 204.08 ug/L 95.2 75-125 2 <br /> MSD 2602102-05 14.600 208.27 204.08 ug/L 0.3 94.9 20 75-125 3 <br /> Dissolved Barium DUP 2602102-05 59.700 59.600 ug/L 0.2 20 1 <br /> MS 2602102-05 59.700 490.20 408.16 ug/L 105 75-125 2 <br /> MSD 2602102-05 59.700 490.41 408.16 ug/L 0.0 106 20 75-125 3 <br /> Dissolved Beryllium DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 186.31 204.08 ug/L 91.3 75-125 2 <br /> MSD 2602102-05 ND 186.72 204.08 ug/L 0.2 91.5 20 75-125 3 <br /> Dissolved Cadmium DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 190.31 204.08 ug/L 93.3 75-125 2 <br /> MSD 2602102-05 ND 190.71 204.08 ug/L 0.2 93.5 20 75-125 3 <br /> Dissolved Chromium DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 187.55 204.08 ug/L 91.9 75-125 2 <br /> MSD 2602102-05 ND 187.35 204.08 ug/L 0.1 91.8 20 75-125 3 <br /> Dissolved Cobalt DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 188.47 204.08 ug/L 92.4 75-125 2 <br /> MSD 2602102-05 ND 188.57 204.08 ug/L 0.1 92.4 20 75-125 3 <br /> Dissolved Copper DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 369.29 408.16 ug/L 90.5 75-125 2 <br /> MSD 2602102-05 ND 370.00 408.16 ug/L 0.2 90.7 20 75-125 3 <br /> Dissolved Iron DUP 2602102-05 2367.9 2366.6 ug/L 0.1 20 1 <br /> MS 2602102-05 2367.9 3461.3 1020.4 ug/L 107 75-125 2 <br /> MSD 2602102-05 2367.9 3458.9 1020.4 ug/L 0.1 107 20 75-125 3 <br /> Dissolved Lead DUP 2602102-05 ND ND ug/L 20 1 <br /> MS 2602102-05 ND 378.67 408.16 ug/L 92.8 75-125 2 <br /> MSD 2602102-05 ND 379.39 408.16 ug/L 0.2 93.0 20 75-125 3 <br /> Dissolved Manganese DUP 2602102-05 742.20 740.90 ug/L 0.2 20 1 <br /> MS 2602102-05 742.20 1285.7 510.20 ug/L 107 75-125 2 <br /> MSD 2602102-05 742.20 1283.2 510.20 ug/L 0.2 106 20 75-125 3 <br /> Dissolved Molybdenum DUP 2602102-05 16.600 16.400 ug/L 1.2 20 J 1 <br /> MS 2602102-05 16.600 206.53 204.08 ug/L 93.1 75-125 2 <br /> MSD 2602102-05 16.600 207.96 204.08 ug/L 0.7 93.8 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: 1001665591 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 41 of 43 <br />