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APTIM - Solid Waste Department <br />4171 Essen Lane <br />Baton Rouge, LA 70809 <br />Project: <br />Project Number: <br />Project Manager: <br />Foothill Landfill, SJ County <br />631038217 <br />Sandra Pimienta <br />Reported:01/23/2025 17:34 <br />Quality Control Report - Precision & Accuracy <br />Constituent Sample IDType Result Result Added Units RPD Recovery RPD Recovery Quals <br />Source Spike Percent Percent <br />Control Limits <br />Water Analysis (General Chemistry) <br />Source Lab <br />R# <br />QC Batch ID: B202419 Used client sample: N <br />Bicarbonate DUP 1490.2 1.4 101469.82500766-02 mg/L 1 <br />Carbonate DUP ND 10ND2500766-02 mg/L 1 <br />Total Alkalinity as CaCO3 DUP 1222.2 1.4 101205.52500766-02 mg/L 1 <br />QC Batch ID: B204443 Used client sample: Y - Description: MW-1A, 01/14/2025 09:40 <br />Chloride DUP 8.2639 0.4 108.29542500767-01 mg/L 2 <br />MS 63.885 80 - 1208.2954 50.505 1102500767-01 mg/L 3 <br />MSD 63.878 0.0 10 80 - 1208.2954 50.505 1102500767-01 mg/L 4 <br />Nitrate as N DUP 1.8598 0.0 101.85952500767-01 mg/L 2 <br />MS 7.2569 80 - 1201.8595 5.0505 1072500767-01 mg/L 3 <br />MSD 7.2460 0.2 10 80 - 1201.8595 5.0505 1072500767-01 mg/L 4 <br />Sulfate DUP 8.7589 2.3 108.56232500767-01 mg/L 2 <br />MS 119.49 80 - 1208.5623 101.01 1102500767-01 mg/L 3 <br />MSD 119.37 0.1 10 80 - 1208.5623 101.01 1102500767-01 mg/L 4 <br />QC Batch ID: B204449 Used client sample: N <br />Dissolved Calcium DUP ND 20ND2500747-02 mg/L 5 <br />MS 10.758 75 - 125ND10.204 1052500747-02 mg/L 6 <br />MSD 10.806 0.4 20 75 - 125ND10.204 1062500747-02 mg/L 7 <br />Dissolved Magnesium DUP ND 20ND2500747-02 mg/L 5 <br />MS 11.275 75 - 125ND10.204 1102500747-02 mg/L 6 <br />MSD 11.327 0.5 20 75 - 125ND10.204 1112500747-02 mg/L 7 <br />Dissolved Sodium DUP ND 20ND2500747-02 mg/L 5 <br />MS 9.9419 75 - 125ND10.204 97.42500747-02 mg/L 6 <br />MSD 9.9068 0.4 20 75 - 125ND10.204 97.12500747-02 mg/L 7 <br />Dissolved Potassium DUP ND 20ND2500747-02 mg/L 5 <br />MS 10.818 75 - 125ND10.204 1062500747-02 mg/L 6 <br />MSD 10.820 0.0 20 75 - 125ND10.204 1062500747-02 mg/L 7 <br />QC Batch ID: B204631 Used client sample: N <br />Total Dissolved Solids @ 180 C DUP 1700.0 0 101700.02500853-01 mg/L 8 <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 />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 44 of 49Report ID: 1001565692