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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 13:59 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 Forward Landfill <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: B226564 <br /> Chloride B226564-BS1 LCS 50.617 50.000 mg/L 101 90-110 1 <br /> Nitrate as N B226564-BS1 LCS 5.0440 5.0000 mg/L 101 90-110 1 <br /> Sulfate B226564-BS1 LCS 100.37 100.00 mg/L 100 90-110 1 <br /> QC Batch ID: B226579 <br /> Chloride B226579-BS1 LCS 49.994 50.000 mg/L 100 90-110 2 <br /> Nitrate as NO3 B226579-BS1 LCS 21.632 22.134 mg/L 97.7 90-110 2 <br /> Nitrate as N B226579-BS1 LCS 4.8875 5.0000 mg/L 97.8 90-110 2 <br /> Sulfate B226579-BS1 LCS 100.54 100.00 mg/L 101 90-110 2 <br /> Nitrite as NO2 B226579-BS1 LCS 3.4620 3.2850 mg/L 105 90-110 2 <br /> QC Batch ID: B226629 <br /> Dissolved Calcium B226629-BS1 LCS 10.369 10.000 mg/L 104 80-120 3 <br /> Dissolved Magnesium B226629-BS1 LCS 8.9264 10.000 mg/L 89.3 80-120 3 <br /> Dissolved Sodium B226629-BS1 LCS 9.0618 10.000 mg/L 90.6 80-120 3 <br /> Dissolved Potassium B226629-BS1 LCS 9.7689 10.000 mg/L 97.7 80-120 3 <br /> QC Batch ID: B226705 <br /> Total Alkalinity as CaCO3 B226705-BS3 LCS 93.110 100.00 mg/L 93.1 90-110 4 <br /> QC Batch ID: B226718 <br /> Total Kjeldahl Nitrogen B226718-BS1 LCS 2.0223 2.0000 mg/L 101 90-110 5 <br /> QC Batch ID: B226793 <br /> Total Alkalinity as CaCO3 B226793-BS3 LCS 102.69 100.00 mg/L 103 90-110 6 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226564-BS1 LCS EPA-300.0 02/03/26 02/03/2610:27 OAE IC5 1 <br /> 2 B226579-BS1 LCS EPA-300.0 02/03/26 02/03/2613:34 PRE IC12 1 <br /> 3 B226629-BS1 LCS EPA-6010B 02/04/26 02/04/26 21:32 JEH ICP6 1 <br /> 4 B226705-BS3 LCS EPA-310.1 02/05/26 02/05/2617:35 JMH2 MET-1 1 <br /> 5 B226718-BS1 LCS EPA-351.2 02/05/26 02/09/2612:08 JMH2 SC-1 1 <br /> 6 B226793-BS3 LCS EPA-310.1 02/06/26 02/06/26 09:47 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: 1001665505 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 81 of 87 <br />