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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 9:09 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 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: B226723 <br /> Chloride B226723-BS1 LCS 49.846 50.000 mg/L 99.7 90-110 1 <br /> Nitrate as NO3 B226723-BS1 LCS 21.594 22.134 mg/L 97.6 90-110 1 <br /> Nitrate as N B226723-BS1 LCS 4.8780 5.0000 mg/L 97.6 90-110 2 <br /> Sulfate B226723-BS1 LCS 100.71 100.00 mg/L 101 90-110 1 <br /> Nitrite as NO2 B226723-BS1 LCS 3.3083 3.2850 mg/L 101 90-110 2 <br /> QC Batch ID: B226724 <br /> Chloride B226724-BS1 LCS 49.770 50.000 mg/L 99.5 90-110 3 <br /> Nitrate as N B226724-BS1 LCS 4.9320 5.0000 mg/L 98.6 90-110 3 <br /> Sulfate B226724-BS1 LCS 98.851 100.00 mg/L 98.9 90-110 3 <br /> QC Batch ID: B226725 <br /> Chloride B226725-BS1 LCS 50.203 50.000 mg/L 100 90-110 4 <br /> Nitrate as N B226725-BS1 LCS 4.9900 5.0000 mg/L 99.8 90-110 4 <br /> Sulfate B226725-BS1 LCS 99.491 100.00 mg/L 99.5 90-110 4 <br /> QC Batch ID: B226810 <br /> Dissolved Calcium B226810-BS1 LCS 9.9070 10.000 mg/L 99.1 80-120 5 <br /> Dissolved Magnesium B226810-BS1 LCS 9.2032 10.000 mg/L 92.0 80-120 5 <br /> Dissolved Sodium B226810-BS1 LCS 9.9695 10.000 mg/L 99.7 80-120 5 <br /> Dissolved Potassium B226810-BS1 LCS 9.8377 10.000 mg/L 98.4 80-120 5 <br /> QC Batch ID: B226938 <br /> Total Alkalinity as CaCO3 B226938-BS3 LCS 104.36 100.00 mg/L 104 90-110 6 <br /> QC Batch ID: B226939 <br /> Total Alkalinity as CaCO3 B226939-BS3 LCS 102.54 100.00 mg/L 103 90-110 7 <br /> QC Batch ID: B226940 <br /> Total Alkalinity as CaCO3 B226940-BS3 LCS 106.04 100.00 mg/L 106 90-110 8 <br /> QC Batch ID: B227424 <br /> Total Kjeldahl Nitrogen B227424-BS1 LCS 1.9875 2.0000 mg/L 99.4 90-110 9 <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: 1001665792 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 87 of 95 <br />