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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:17 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1 Q26 Extraction Wells <br /> Project Manager: Dalia Rumani <br /> Water Analysis (General Chemistry) <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: B226770 <br /> Chloride B226770-BS1 LCS 50.680 50.000 mg/L 101 90-110 1 <br /> Nitrate as N B226770-BS1 LCS 4.9570 5.0000 mg/L 99.1 90-110 1 <br /> Sulfate B226770-BS1 LCS 102.05 100.00 mg/L 102 90-110 1 <br /> QC Batch ID: B226887 <br /> Dissolved Calcium B226887-BS1 LCS 10.437 10.000 mg/L 104 80-120 2 <br /> Dissolved Magnesium B226887-BS1 LCS 9.2736 10.000 mg/L 92.7 80-120 2 <br /> Dissolved Sodium B226887-BS1 LCS 9.9955 10.000 mg/L 100 80-120 2 <br /> Dissolved Potassium B226887-BS1 LCS 10.073 10.000 mg/L 101 80-120 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226770-BS1 LCS EPA-300.0 02/05/26 02/05/26 23:01 OAE IC9 1 <br /> 2 B226887-BS1 LCS EPA-6010B 02/09/26 02/09/2618:08 JEH ICP6 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: 1001665559 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 34 of 39 <br />