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C ace Analytical ENVIRONMENTAL SCIENCES Arcadis-SLO Reported: 02/20/2026 12:29 4119 Broad Street Suite 210 Project: Forward Landfill-COELT San Luis Obispo,CA 93401 Project Number: 30274343.01 1Q26 Groundwater Monitoring Wells Project Manager: Dalia Rumani Water Analysis (General Chemistry) Quality Control Report - Method Blank Analysis Constituent QC Sample ID MB Result Units PQL MDL Lab Quals Run# QC Batch ID: B226813 Chloride B226813-BLKI 0.13590 mg/L 0.50 0.13 J 1 Nitrate as N B226813-BLK1 ND mg/L 0.10 0.024 2 Sulfate B226813-BLK1 ND mg/L 1.0 0.14 1 QC Batch ID: B227024 Dissolved Calcium B227024-BLK1 ND mg/L 0.10 0.016 3 Dissolved Magnesium B227024-BLK1 ND mg/L 0.050 0.022 3 Dissolved Sodium B227024-BLK1 ND mg/L 1.0 0.051 3 Dissolved Potassium B227024-BLK1 ND mg/L 1.0 0.10 3 QC Batch ID: B227115 Bicarbonate B227115-BLK1 ND mg/L 5.0 5.0 4 Carbonate B227115-BLK1 ND mg/L 2.5 2.5 4 QC Batch ID: B227116 Bicarbonate B227116-BLK1 ND mg/L 5.0 5.0 5 Carbonate B227116-BLK1 ND mg/L 2.5 2.5 5 Run Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution 1 B226813-BLK1 PB EPA-300.0 02/06/26 02/06/2611:12 PRE IC12 1 2 B226813-BLK1 PB EPA-300.0 02/06/26 02/06/2611:12 OAE IC12 1 3 B227024-BLK1 PB EPA-6010B 02/11/26 02/11/2610:19 NW1 ICP5 1 4 B227115-BLK1 PB EPA-310.1 02/12/26 02/12/2612:05 JMH2 MET-1 1 5 B227116-BLK1 PB EPA-310.1 02/12/26 02/12/2614:14 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: 1001655038 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 27 of 34