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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 11:46 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1 Q26 Groundwater Monitoring Wells <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: B226888 Used client sample: Y- Description: AMW-2, 02/05/2026 13:00 <br /> Dissolved Aluminum DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 1042.3 1020.4 ug/L 102 75-125 2 <br /> MSD 2601898-16 ND 1038.8 1020.4 ug/L 0.3 102 20 75-125 3 <br /> Dissolved Antimony DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 405.92 408.16 ug/L 99.5 75-125 2 <br /> MSD 2601898-16 ND 403.57 408.16 ug/L 0.6 98.9 20 75-125 3 <br /> Dissolved Arsenic DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 211.43 204.08 ug/L 104 75-125 2 <br /> MSD 2601898-16 ND 210.20 204.08 ug/L 0.6 103 20 75-125 3 <br /> Dissolved Barium DUP 2601898-16 80.200 80.100 ug/L 0.1 20 1 <br /> MS 2601898-16 80.200 502.86 408.16 ug/L 104 75-125 2 <br /> MSD 2601898-16 80.200 504.08 408.16 ug/L 0.2 104 20 75-125 3 <br /> Dissolved Beryllium DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 201.04 204.08 ug/L 98.5 75-125 2 <br /> MSD 2601898-16 ND 201.30 204.08 ug/L 0.1 98.6 20 75-125 3 <br /> Dissolved Cadmium DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 211.94 204.08 ug/L 104 75-125 2 <br /> MSD 2601898-16 ND 212.35 204.08 ug/L 0.2 104 20 75-125 3 <br /> Dissolved Chromium DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 204.49 204.08 ug/L 100 75-125 2 <br /> MSD 2601898-16 ND 204.90 204.08 ug/L 0.2 100 20 75-125 3 <br /> Dissolved Cobalt DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 204.80 204.08 ug/L 100 75-125 2 <br /> MSD 2601898-16 ND 205.10 204.08 ug/L 0.1 100 20 75-125 3 <br /> Dissolved Copper DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 397.86 408.16 ug/L 97.5 75-125 2 <br /> MSD 2601898-16 ND 398.06 408.16 ug/L 0.1 97.5 20 75-125 3 <br /> Dissolved Iron DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 1052.0 1020.4 ug/L 103 75-125 2 <br /> MSD 2601898-16 ND 1058.1 1020.4 ug/L 0.6 104 20 75-125 3 <br /> Dissolved Lead DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 411.43 408.16 ug/L 101 75-125 2 <br /> MSD 2601898-16 ND 412.35 408.16 ug/L 0.2 101 20 75-125 3 <br /> Dissolved Manganese DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 531.33 510.20 ug/L 104 75-125 2 <br /> MSD 2601898-16 ND 532.55 510.20 ug/L 0.2 104 20 75-125 3 <br /> Dissolved Molybdenum DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 209.18 204.08 ug/L 102 75-125 2 <br /> MSD 2601898-16 ND 210.61 204.08 ug/L 0.7 103 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 1001665835 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 114 of 116 <br />