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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:13 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 <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: B226433 <br /> Nitrate as N B226433-BS1 LCS 5.0091 5.0000 mg/L 100 90-110 1 <br /> QC Batch ID: B226447 <br /> Chloride B226447-BS1 LCS 51.692 50.000 mg/L 103 90-110 2 <br /> Nitrate as N B226447-BS1 LCS 5.0191 5.0000 mg/L 100 90-110 2 <br /> Sulfate B226447-BS1 LCS 105.73 100.00 mg/L 106 90-110 2 <br /> QC Batch ID: B226448 <br /> Chloride B226448-BS1 LCS 50.920 50.000 mg/L 102 90-110 3 <br /> Nitrate as N B226448-BS1 LCS 5.0060 5.0000 mg/L 100 90-110 3 <br /> Sulfate B226448-BS1 LCS 101.19 100.00 mg/L 101 90-110 3 <br /> QC Batch ID: B226477 <br /> Dissolved Calcium B226477-BS1 LCS 10.474 10.000 mg/L 105 80-120 4 <br /> Dissolved Magnesium B226477-BS1 LCS 9.7938 10.000 mg/L 97.9 80-120 4 <br /> Dissolved Sodium B226477-BS1 LCS 10.413 10.000 mg/L 104 80-120 4 <br /> Dissolved Potassium B226477-BS1 LCS 10.120 10.000 mg/L 101 80-120 4 <br /> QC Batch ID: B226626 <br /> Total Alkalinity as CaCO3 B226626-BS3 LCS 98.280 100.00 mg/L 98.3 90-110 5 <br /> QC Batch ID: B226627 <br /> Total Alkalinity as CaCC3 B226627-BS3 LCS 102.08 100.00 mg/L 102 90-110 6 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226433-BS1 LCS EPA-300.0 01/30/26 01/30/2611:08 OAE IC9 1 <br /> 2 B226447-BSI LCS EPA-300.0 01/30/26 01/30/2613:40 PRE IC12 1 <br /> 3 B226448-BS1 LCS EPA-300.0 01/30/26 01/30/2613:50 OAE IC7 1 <br /> 4 B226477-BS1 LCS EPA-6010B 02/02/26 02/02/2614:20 JRG ICP6 1 <br /> 5 B226626-BS3 LCS EPA-310.1 02/04/26 02/04/2611:51 JMH2 MET-1 1 <br /> 6 B226627-BS3 LCS EPA-310.1 02/04/26 02/04/2614:09 JMH2 MET-1 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: 1001665557 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 112 of 118 <br />