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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 11:37 <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: B227024 Used client sample: N <br /> Dissolved Nickel DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 438.37 408.16 ug/L 107 75-125 2 <br /> MSD 2601989-01 ND 436.53 408.16 ug/L 0.4 107 20 75-125 3 <br /> Dissolved Selenium DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 238.27 204.08 ug/L 117 75-125 2 <br /> MSD 2601989-01 ND 239.18 204.08 ug/L 0.4 117 20 75-125 3 <br /> Dissolved Silver DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 104.69 102.04 ug/L 103 75-125 2 <br /> MSD 2601989-01 ND 105.41 102.04 ug/L 0.7 103 20 75-125 3 <br /> Dissolved Tin DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 227.14 204.08 ug/L ill 75-125 2 <br /> MSD 2601989-01 ND 229.90 204.08 ug/L 1.2 113 20 75-125 3 <br /> Dissolved Thallium DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 438.16 408.16 ug/L 107 75-125 2 <br /> MSD 2601989-01 ND 439.80 408.16 ug/L 0.4 108 20 75-125 3 <br /> Dissolved Vanadium DUP 2601989-01 20.900 20.400 ug/L 2.4 20 1 <br /> MS 2601989-01 20.900 242.35 204.08 ug/L 109 75-125 2 <br /> MSD 2601989-01 20.900 242.24 204.08 ug/L 0.0 108 20 75-125 3 <br /> Dissolved Zinc DUP 2601989-01 ND ND ug/L 20 1 <br /> MS 2601989-01 ND 563.98 510.20 ug/L ill 75-125 2 <br /> MSD 2601989-01 ND 563.37 510.20 ug/L 0.1 110 20 75-125 3 <br /> QC Batch ID: B227448 Used client sample: N <br /> Dissolved Mercury DUP 2601898-16 0.030250 0.030750 ug/L 1.6 20 J 4 <br /> MS 2601898-16 0.030250 1.0250 1.0000 ug/L 99.5 70-130 5 <br /> MSD 2601898-16 0.030250 1.0125 1.0000 ug/L 1.2 98.2 20 70-130 6 <br /> QC Batch ID: B227527 Used client sample: N <br /> Dissolved Mercury DUP 2601992-02 ND 0.024975 ug/L 20 J 7 <br /> MS 2601992-02 ND 1.0300 1.0000 ug/L 103 70-130 8 <br /> MSD 2601992-02 ND 1.0350 1.0000 ug/L 0.5 104 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: 1001665326 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 42 of 44 <br />