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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:42 <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: B227009 <br /> Chloride B227009-BS1 LCS 51.673 50.000 mg/L 103 90-110 1 <br /> Nitrate as N B227009-BS1 LCS 4.9650 5.0000 mg/L 99.3 90-110 1 <br /> Sulfate B227009-BS1 LCS 102.37 100.00 mg/L 102 90-110 1 <br /> QC Batch ID: B227109 <br /> Dissolved Calcium B227109-BS1 LCS 10.228 10.000 mg/L 102 80-120 2 <br /> Dissolved Magnesium B227109-BS1 LCS 9.1666 10.000 mg/L 91.7 80-120 2 <br /> Dissolved Sodium B227109-BS1 LCS 9.8618 10.000 mg/L 98.6 80-120 2 <br /> Dissolved Potassium B227109-BS1 LCS 10.030 10.000 mg/L 100 80-120 2 <br /> QC Batch ID: B227224 <br /> Dissolved Sulfide B227224-BS1 LCS 0.49204 0.50000 mg/L 98.4 90-110 3 <br /> B227224-BSD1 LCSD 0.49385 0.50000 mg/L 98.8 0.4 90-110 200 4 <br /> QC Batch ID: B227537 <br /> Dissolved Cyanide B227537-BS1 LCS 0.15231 0.15000 mg/L 102 90-110 5 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B227009-BS1 LCS EPA-300.0 02/10/26 02/10/26 22:04 PRE IC7 1 <br /> 2 B227109-BS1 LCS EPA-6010B 02/12/26 02/12/2613:01 JRG ICP6 1 <br /> 3 B227224-BSI LCS SM-450OSD 02/13/26 02/13/26 09:20 JT3 SPEC06 1 <br /> 4 B227224-BSD1 LCSD SM-450OSD 02/13/26 02/13/26 09:20 JT3 SPEC06 1 <br /> 5 B227537-BSI LCS EPA-9010C 02/19/26 02/19/2615:24 RC1 KONE-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: 1001665591 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 36 of 43 <br />