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C ace Analytical ENVIRONMENTAL SCIENCES Arcadis-SLO Reported: 04/13/2026 11:08 4119 Broad Street Suite 210 Project: Forward Landfill-COELT San Luis Obispo,CA 93401 Project Number: 30274343.01 Project Manager: Dalia Rumani Water Analysis (General Chemistry) Quality Control Report - Laboratory Control Sample Control Limits Spike Percent Percent Lab Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Run# QC Batch ID: B226466 Chloride B226466-BSI LCS 51.539 50.000 mg/L 103 90-110 1 Nitrate as N B226466-BS1 LCS 5.0770 5.0000 mg/L 102 90-110 1 Sulfate B226466-BS1 LCS 101.88 100.00 mg/L 102 90-110 1 QC Batch ID: B226547 Dissolved Calcium B226547-BS1 LCS 10.172 10.000 mg/L 102 80-120 2 Dissolved Magnesium B226547-BS1 LCS 8.8773 10.000 mg/L 88.8 80-120 2 Dissolved Sodium B226547-BS1 LCS 9.6367 10.000 mg/L 96.4 80-120 2 Dissolved Potassium B226547-BS1 LCS 10.018 10.000 mg/L 100 80-120 2 QC Batch ID: B226703 Total Alkalinity as CaCO3 B226703-BS3 LCS 98.430 100.00 mg/L 98.4 90-110 3 QC Batch ID: B226704 Total Alkalinity as CaCO3 B226704-BS3 LCS 101.62 100.00 mg/L 102 90-110 4 Run Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution 1 B226466-BS1 LCS EPA-300.0 01/30/26 01/30/26 22:45 RC1 IC5 1 2 B226547-BS1 LCS EPA-6010B 02/03/26 02/03/2617:12 JEH ICP6 1 3 B226703-BS3 LCS EPA-310.1 02/05/26 02/05/2612:05 JMH2 MET-1 1 4 B226704-BS3 LCS EPA-310.1 02/05/26 02/05/2615:01 JMH2 MET-1 1 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. 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. Report ID: 1001665296 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 78 of 84