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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 - 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: B227009 Used client sample: N <br /> Chloride DUP 2602102-11 84.642 84.821 mg/L 0.2 10 1 <br /> MS 2602102-11 84.642 138.48 50.505 mg/L 107 80-120 2 <br /> MSD 2602102-11 84.642 138.52 50.505 mg/L 0.0 107 10 80-120 3 <br /> Nitrate as N DUP 2602102-11 ND ND mg/L 10 1 <br /> MS 2602102-11 ND 5.0283 5.0505 mg/L 99.6 80-120 2 <br /> MSD 2602102-11 ND 5.0424 5.0505 mg/L 0.3 99.8 10 80-120 3 <br /> Sulfate DUP 2602102-11 100.86 101.42 mg/L 0.6 10 1 <br /> MS 2602102-11 100.86 211.71 101.01 mg/L 110 80-120 2 <br /> MSD 2602102-11 100.86 211.41 101.01 mg/L 0.1 109 10 80-120 3 <br /> QC Batch ID: B227109 Used client sample: N <br /> Dissolved Calcium DUP 2602102-05 95.430 95.293 mg/L 0.1 20 4 <br /> MS 2602102-05 95.430 105.74 10.204 mg/L 101 75-125 5 <br /> MSD 2602102-05 95.430 105.55 10.204 mg/L 0.2 99.2 20 75-125 6 <br /> Dissolved Magnesium DUP 2602102-05 25.075 25.064 mg/L 0.0 20 4 <br /> MS 2602102-05 25.075 34.369 10.204 mg/L 91.1 75-125 5 <br /> MSD 2602102-05 25.075 34.378 10.204 mg/L 0.0 91.2 20 75-125 6 <br /> Dissolved Sodium DUP 2602102-05 64.852 64.454 mg/L 0.6 20 4 <br /> MS 2602102-05 64.852 74.274 10.204 mg/L 92.3 75-125 5 <br /> MSD 2602102-05 64.852 74.305 10.204 mg/L 0.0 92.6 20 75-125 6 <br /> Dissolved Potassium DUP 2602102-05 3.5189 3.4617 mg/L 1.6 20 4 <br /> MS 2602102-05 3.5189 14.266 10.204 mg/L 105 75-125 5 <br /> MSD 2602102-05 3.5189 14.283 10.204 mg/L 0.1 105 20 75-125 6 <br /> QC Batch ID: B227224 Used client sample: Y-Description: FU-03, 02/10/2026 10:00 <br /> Dissolved Sulfide DUP 2602110-01 ND ND mg/L 10 7 <br /> MS 2602110-01 ND 0.46127 0.50000 mg/L 92.3 80-120 8 <br /> MSD 2602110-01 ND 0.45585 0.50000 mg/L 1.2 91.2 10 80-120 9 <br /> QC Batch ID: B227273 Used client sample: N <br /> Bicarbonate DUP 2602102-11 217.03 233.72 mg/L 7.4 10 10 <br /> Carbonate DUP 2602102-11 ND ND mg/L 10 10 <br /> QC Batch ID: B227274 Used client sample: Y-Description: FU-19E, 02/10/2026 11:35 <br /> Bicarbonate DUP 2602110-03 4281.9 4330.1 mg/L 1.1 10 11 <br /> Carbonate DUP 2602110-03 ND ND mg/L 10 11 <br /> QC Batch ID: B227537 Used client sample: Y-Description: FU-03, 02/10/2026 10:00 <br /> Dissolved Cyanide DUP 2602110-01 0.0030960 0.0031380 mg/L 1.3 10 J 12 <br /> MS 2602110-01 0.0030960 0.10992 0.10000 mg/L 107 90-110 13 <br /> MSD 2602110-01 0.0030960 0.10971 0.10000 mg/L 0.2 107 20 90-110 14 <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 37 of 43 <br />