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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 - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent Lab <br /> Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals R# <br /> QC Batch ID: B226810 Used client sample: Y-Description: AMW-14, 02/04/2026 10:01 <br /> Dissolved Calcium DUP 2601809-01 50.845 51.196 mg/L 0.7 20 13 <br /> MS 2601809-01 50.845 61.426 10.204 mg/L 104 75-125 14 <br /> MSD 2601809-01 50.845 61.520 10.204 mg/L 0.2 105 20 75-125 15 <br /> Dissolved Magnesium DUP 2601809-01 22.977 22.944 mg/L 0.1 20 13 <br /> MS 2601809-01 22.977 32.813 10.204 mg/L 96.4 75-125 14 <br /> MSD 2601809-01 22.977 32.999 10.204 mg/L 0.6 98.2 20 75-125 15 <br /> Dissolved Sodium DUP 2601809-01 43.673 43.349 mg/L 0.7 20 13 <br /> MS 2601809-01 43.673 53.875 10.204 mg/L 100 75-125 14 <br /> MSD 2601809-01 43.673 53.694 10.204 mg/L 0.3 98.2 20 75-125 15 <br /> Dissolved Potassium DUP 2601809-01 3.9444 3.8815 mg/L 1.6 20 13 <br /> MS 2601809-01 3.9444 14.304 10.204 mg/L 102 75-125 14 <br /> MSD 2601809-01 3.9444 14.352 10.204 mg/L 0.3 102 20 75-125 15 <br /> QC Batch ID: B226938 Used client sample: N <br /> Bicarbonate DUP 2601797-02 1137.8 1157.1 mg/L 1.7 10 16 <br /> Carbonate DUP 2601797-02 ND ND mg/L 10 16 <br /> Total Alkalinity as CaCO3 DUP 2601797-02 933.18 949.00 mg/L 1.7 10 16 <br /> QC Batch ID: B226939 Used client sample: Y- Description: AMW-34M, 02/04/2026 11:03 <br /> Bicarbonate DUP 2601809-02 239.28 230.75 mg/L 3.6 10 17 <br /> Carbonate DUP 2601809-02 ND ND mg/L 10 17 <br /> Total Alkalinity as CaCO3 DUP 2601809-02 196.25 189.25 mg/L 3.6 10 17 <br /> QC Batch ID: B226940 Used client sample: Y-Description: MW-19R, 02/04/2026 15:59 <br /> Bicarbonate DUP 2601809-15 405.86 413.28 mg/L 1.8 10 18 <br /> Carbonate DUP 2601809-15 ND ND mg/L 10 18 <br /> Total Alkalinity as CaCO3 DUP 2601809-15 332.87 338.95 mg/L 1.8 10 18 <br /> QC Batch ID: B227424 Used client sample: Y-Description: AMW-14, 02/04/2026 10:01 <br /> Total Kjeldahl Nitrogen DUP 2601809-01 ND ND mg/L 20 19 <br /> MS 2601809-01 ND 2.1843 2.0000 mg/L 109 90-110 20 <br /> MSD 2601809-01 ND 2.1454 2.0000 mg/L 1.8 107 20 90-110 21 <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 90 of 95 <br />