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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 Nickel DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 413.06 408.16 ug/L 101 75-125 2 <br /> MSD 2601898-16 ND 414.39 408.16 ug/L 0.3 102 20 75-125 3 <br /> Dissolved Selenium DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 218.78 204.08 ug/L 107 75-125 2 <br /> MSD 2601898-16 ND 219.49 204.08 ug/L 0.3 108 20 75-125 3 <br /> Dissolved Silver DUp 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 66.837 102.04 ug/L 65.5 75-125 Q03 2 <br /> MSD 2601898-16 ND 67.143 102.04 ug/L 0.5 65.8 20 75-125 Q03 3 <br /> Dissolved Strontium DUP 2601898-16 471.70 470.80 ug/L 0.2 20 1 <br /> MS 2601898-16 471.70 1000.5 510.20 ug/L 104 75-125 2 <br /> MSD 2601898-16 471.70 1001.8 510.20 ug/L 0.1 104 20 75-125 3 <br /> Dissolved Tin DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 215.61 204.08 ug/L 106 75-125 2 <br /> MSD 2601898-16 ND 217.96 204.08 ug/L 1.1 107 20 75-125 3 <br /> Dissolved Thallium DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 430.00 408.16 ug/L 105 75-125 2 <br /> MSD 2601898-16 ND 426.33 408.16 ug/L 0.9 104 20 75-125 3 <br /> Dissolved Vanadium DUP 2601898-16 24.900 24.700 ug/L 0.8 20 1 <br /> MS 2601898-16 24.900 227.65 204.08 ug/L 99.3 75-125 2 <br /> MSD 2601898-16 24.900 228.88 204.08 ug/L 0.5 99.9 20 75-125 3 <br /> Dissolved Zinc DUP 2601898-16 ND ND ug/L 20 1 <br /> MS 2601898-16 ND 537.24 510.20 ug/L 105 75-125 2 <br /> MSD 2601898-16 ND 538.37 510.20 ug/L 0.2 106 20 75-125 3 <br /> QC Batch ID: B227448 Used client sample: Y-Description: AMW-2, 02/05/2026 13:00 <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 /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226888-DUP1 DUP EPA-6010B 02/09/26 02/09/26 20:55 JEH ICP6 1 <br /> 2 B226888-MS1 MS EPA-6010B 02/09/26 02/09/26 20:59 JEH ICP6 1.020 <br /> 3 B226888-MSD1 MSD EPA-6010B 02/09/26 02/09/26 21:00 JEH ICP6 1.020 <br /> 4 B227448-DUP1 DUP EPA-7470A 02/18/26 02/18/2616:37 TMT CETAC4 1 <br /> 5 B227448-MS1 MS EPA-7470A 02/18/26 02/18/2616:39 TMT CETAC4 1 <br /> 6 B227448-MSD1 MSD EPA-7470A 02/18/26 02/18/2616:41 TMT CETAC4 1 <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 115 of 116 <br />