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C ace Analytical ENVIRONMENTAL SCIENCES Arcadis-SLO Reported: 04/14/2026 9:09 4119 Broad Street Suite 210 Project: Forward Landfill-COELT San Luis Obispo,CA 93401 Project Number: Forward Landfill Project Manager: Dalia Rumani Water Analysis (General Chemistry) Quality Control Report - Precision & Accuracy Control Limits Source Source Spike Percent Percent Lab Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals R# QC Batch ID: B226723 Used client sample: N Chloride DUP 2601804-01 149.12 149.62 mg/L 0.3 10 A10 1 MS 2601804-01 149.12 252.71 101.01 mg/L 103 80-120 A10 2 MSD 2601804-01 149.12 252.56 101.01 mg/L 0.1 102 10 80-120 A10 3 Nitrate as NO3 DUP 2601804-01 39.481 39.647 mg/L 0.4 10 A10 1 MS 2601804-01 39.481 85.452 44.715 mg/L 103 80-120 A10 2 MSD 2601804-01 39.481 85.405 44.715 mg/L 0.1 103 10 80-120 A10 3 Nitrate as N DUP 2601804-01 8.9186 8.9562 mg/L 0.4 10 A10 4 MS 2601804-01 8.9186 19.303 10.101 mg/L 103 80-120 A10 5 MSD 2601804-01 8.9186 19.293 10.101 mg/L 0.1 103 10 80-120 A10 6 Sulfate DUP 2601804-01 226.26 227.16 mg/L 0.4 10 A10 1 MS 2601804-01 226.26 440.37 202.02 mg/L 106 80-120 A10 2 MSD 2601804-01 226.26 440.38 202.02 mg/L 0.0 106 10 80-120 A10 3 Nitrite as NO2 DUP 2601804-01 ND ND mg/L 10 A10 4 MS 2601804-01 ND 6.5123 6.6364 mg/L 98.1 80-120 A10 5 MSD 2601804-01 ND 6.5222 6.6364 mg/L 0.2 98.3 10 80-120 A10 6 QC Batch ID: B226724 Used client sample: Y-Description: AMW-34M, 02/04/2026 11:03 Chloride DUP 2601809-02 66.634 66.780 mg/L 0.2 10 7 MS 2601809-02 66.634 119.94 50.505 mg/L 106 80-120 8 MSD 2601809-02 66.634 119.80 50.505 mg/L 0.1 105 10 80-120 9 Nitrate as N DUP 2601809-02 11.764 11.790 mg/L 0.2 10 7 MS 2601809-02 11.764 16.744 5.0505 mg/L 98.6 80-120 8 MSD 2601809-02 11.764 16.714 5.0505 mg/L 0.2 98.0 10 80-120 9 Sulfate DUP 2601809-02 41.723 41.724 mg/L 0.0 10 7 MS 2601809-02 41.723 149.45 101.01 mg/L 107 80-120 8 MSD 2601809-02 41.723 149.39 101.01 mg/L 0.0 107 10 80-120 9 QC Batch ID: B226725 Used client sample: Y-Description: MW-24, 02/04/2026 15:16 Chloride DUP 2601809-14 58.628 59.254 mg/L 1.1 10 10 MS 2601809-14 58.628 170.12 101.01 mg/L 110 80-120 11 MSD 2601809-14 58.628 170.43 101.01 mg/L 0.2 ill 10 80-120 12 Nitrate as N DUP 2601809-14 21.114 21.308 mg/L 0.9 10 10 MS 2601809-14 21.114 31.509 10.101 mg/L 103 80-120 11 MSD 2601809-14 21.114 31.535 10.101 mg/L 0.1 103 10 80-120 12 Sulfate DUP 2601809-14 129.72 130.94 mg/L 0.9 10 10 MS 2601809-14 129.72 351.35 202.02 mg/L 110 80-120 11 MSD 2601809-14 129.72 351.66 202.02 mg/L 0.1 110 10 80-120 12 QC Batch ID: B226810 Used client sample: Y- Description: AMW-14, 02/04/2026 10:01 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. 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. Report ID: 1001665792 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 89 of 95