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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 Nickel DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 368.37 408.16 ug/L 90.2 75-125 2 <br /> MSD 2602031-01 ND 371.22 408.16 ug/L 0.8 91.0 20 75-125 3 <br /> Dissolved Selenium DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 202.86 204.08 ug/L 99.4 75-125 2 <br /> MSD 2602031-01 ND 197.35 204.08 ug/L 2.8 96.7 20 75-125 3 <br /> Dissolved Silver DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 82.143 102.04 ug/L 80.5 75-125 2 <br /> MSD 2602031-01 ND 84.694 102.04 ug/L 3.1 83.0 20 75-125 3 <br /> Dissolved Strontium DUP 2602031-01 762.70 762.00 ug/L 0.1 20 1 <br /> MS 2602031-01 762.70 1248.1 510.20 ug/L 95.1 75-125 2 <br /> MSD 2602031-01 762.70 1247.8 510.20 ug/L 0.0 95.1 20 75-125 3 <br /> Dissolved Tin DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 193.78 204.08 ug/L 95.0 75-125 2 <br /> MSD 2602031-01 ND 194.49 204.08 ug/L 0.4 95.3 20 75-125 3 <br /> Dissolved Thallium DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 366.43 408.16 ug/L 89.8 75-125 2 <br /> MSD 2602031-01 ND 370.71 408.16 ug/L 1.2 90.8 20 75-125 3 <br /> Dissolved Vanadium DUP 2602031-01 17.100 17.100 ug/L 0 20 1 <br /> MS 2602031-01 17.100 202.35 204.08 ug/L 90.8 75-125 2 <br /> MSD 2602031-01 17.100 203.98 204.08 ug/L 0.8 91.6 20 75-125 3 <br /> Dissolved Zinc DUP 2602031-01 ND ND ug/L 20 1 <br /> MS 2602031-01 ND 470.31 510.20 ug/L 92.2 75-125 2 <br /> MSD 2602031-01 ND 473.67 510.20 ug/L 0.7 92.8 20 75-125 3 <br /> QC Batch ID: B227527 Used client sample: N <br /> Dissolved Mercury DUP 2601992-02 ND 0.024975 ug/L 20 J 4 <br /> MS 2601992-02 ND 1.0300 1.0000 ug/L 103 70-130 5 <br /> MSD 2601992-02 ND 1.0350 1.0000 ug/L 0.5 104 20 70-130 6 <br /> QC Batch ID: B227618 Used client sample: N <br /> Dissolved Mercury DUP 2602056-01 ND ND ug/L 20 7 <br /> MS 2602056-01 ND 1.0700 1.0000 ug/L 107 70-130 8 <br /> MSD 2602056-01 ND 1.0600 1.0000 ug/L 0.9 106 20 70-130 9 <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 145 of 147 <br />