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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 - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Run# <br /> QC Batch ID: B226888 <br /> Dissolved Aluminum B226888-BS1 LCS 976.40 1000.0 ug/L 97.6 80-120 1 <br /> Dissolved Antimony B226888-BS1 LCS 390.10 400.00 ug/L 97.5 80-120 1 <br /> Dissolved Arsenic B226888-BS1 LCS 195.90 200.00 ug/L 98.0 80-120 1 <br /> Dissolved Barium B226888-BS1 LCS 399.80 400.00 ug/L 100 80-120 1 <br /> Dissolved Beryllium B226888-BS1 LCS 195.16 200.00 ug/L 97.6 80-120 1 <br /> Dissolved Cadmium B226888-BS1 LCS 206.40 200.00 ug/L 103 80-120 1 <br /> Dissolved Chromium B226888-BS1 LCS 197.90 200.00 ug/L 99.0 80-120 1 <br /> Dissolved Cobalt B226888-BS1 LCS 199.20 200.00 ug/L 99.6 80-120 1 <br /> Dissolved Copper B226888-BS1 LCS 373.70 400.00 ug/L 93.4 80-120 1 <br /> Dissolved Iron B226888-BS1 LCS 1015.1 1000.0 ug/L 102 80-120 1 <br /> Dissolved Lead B226888-BS1 LCS 403.00 400.00 ug/L 101 80-120 1 <br /> Dissolved Manganese B226888-BS1 LCS 508.30 500.00 ug/L 102 80-120 1 <br /> Dissolved Molybdenum B226888-BSI LCS 207.80 200.00 ug/L 104 80-120 1 <br /> Dissolved Nickel B226888-BSI LCS 404.80 400.00 ug/L 101 80-120 1 <br /> Dissolved Selenium B226888-BS1 LCS 205.00 200.00 ug/L 102 80-120 1 <br /> Dissolved Silver B226888-BS1 LCS 94.300 100.00 ug/L 94.3 80-120 1 <br /> Dissolved Strontium B226888-BS1 LCS 501.20 500.00 ug/L 100 80-120 1 <br /> Dissolved Tin B226888-BS1 LCS 208.20 200.00 ug/L 104 80-120 1 <br /> Dissolved Thallium B226888-BS1 LCS 414.90 400.00 ug/L 104 80-120 1 <br /> Dissolved Vanadium B226888-BS1 LCS 193.50 200.00 ug/L 96.8 80-120 1 <br /> Dissolved Zinc B226888-BS1 LCS 519.00 500.00 ug/L 104 80-120 1 <br /> QC Batch ID: B227448 <br /> Dissolved Mercury B227448-BSI LCS 0.95750 1.0000 ug/L 95.8 85-115 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 8226888-BS1 LCS EPA-6010B 02/09/26 02/09/26 20:52 JEH ICP6 1 <br /> 2 B227448-BS1 LCS EPA-7470A 02/18/26 02/18/2616:33 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 113 of 116 <br />