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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 12:02 <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: B226693 Used client sample: Y-Description: MW-16, 02/03/2026 10:21 <br /> Dissolved Selenium DUP 2601733-01 ND ND ug/L 20 1 <br /> MS 2601733-01 ND 255.92 204.08 ug/L 125 75-125 2 <br /> MSD 2601733-01 ND 253.57 204.08 ug/L 0.9 124 20 75-125 3 <br /> Dissolved Silver DUP 2601733-01 ND ND ug/L 20 1 <br /> MS 2601733-01 ND 108.27 102.04 ug/L 106 75-125 2 <br /> MSD 2601733-01 ND 107.45 102.04 ug/L 0.8 105 20 75-125 3 <br /> Dissolved Strontium DUP 2601733-01 1488.2 1502.0 ug/L 0.9 20 1 <br /> MS 2601733-01 1488.2 2024.5 510.20 ug/L 105 75-125 2 <br /> MSD 2601733-01 1488.2 2034.7 510.20 ug/L 0.5 107 20 75-125 3 <br /> Dissolved Tin DUP 2601733-01 ND ND ug/L 20 1 <br /> MS 2601733-01 ND 240.31 204.08 ug/L 118 75-125 2 <br /> MSD 2601733-01 ND 243.47 204.08 ug/L 1.3 119 20 75-125 3 <br /> Dissolved Thallium DUP 2601733-01 ND ND ug/L 20 1 <br /> MS 2601733-01 ND 455.41 408.16 ug/L 112 75-125 2 <br /> MSD 2601733-01 ND 458.57 408.16 ug/L 0.7 112 20 75-125 3 <br /> Dissolved Vanadium DUP 2601733-01 17.400 17.800 ug/L 2.3 20 1 <br /> MS 2601733-01 17.400 253.57 204.08 ug/L 116 75-125 2 <br /> MSD 2601733-01 17.400 254.18 204.08 ug/L 0.2 116 20 75-125 3 <br /> Dissolved Zinc DUP 2601733-01 ND ND ug/L 20 1 <br /> MS 2601733-01 ND 588.57 510.20 ug/L 115 75-125 2 <br /> MSD 2601733-01 ND 589.39 510.20 ug/L 0.1 116 20 75-125 3 <br /> QC Batch ID: B226706 Used client sample: N <br /> Dissolved Arsenic DUP 2601716-01 2.1410 2.1090 ug/L 1.5 20 4 <br /> MS 2601716-01 2.1410 105.55 102.04 ug/L 101 70-130 5 <br /> MSD 2601716-01 2.1410 104.89 102.04 ug/L 0.6 101 20 70-130 6 <br /> QC Batch ID: B227049 Used client sample: N <br /> Dissolved Mercury DUP 2601782-01 ND ND ug/L 20 7 <br /> MS 2601782-01 ND 1.1150 1.0000 ug/L 112 70-130 8 <br /> MSD 2601782-01 ND 1.1050 1.0000 ug/L 0.9 110 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: 1001665842 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 107 of 109 <br />