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Arcadis- SLO <br />4119 Broad Street Suite 210 <br />San Luis Obispo, CA 93401 <br />Project: <br />Project Number: <br />Project Manager: <br />Forward Landfill <br />4Q23 Austin Unit <br />Aaron Hook <br />Reported:12/11/2023 17:13 <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: B177567 Used client sample: N <br />Bicarbonate DUP 647.74 1.6 10637.722320884-02 mg/L 1 <br />Carbonate DUP ND 10ND2320884-02 mg/L 1 <br />QC Batch ID: B177568 Used client sample: Y - Description: AMW-38S, 11/06/2023 13:28 <br />Bicarbonate DUP 526.98 0.6 10524.012321035-06 mg/L 2 <br />Carbonate DUP ND 10ND2321035-06 mg/L 2 <br />QC Batch ID: B177569 Used client sample: Y - Description: AMW-36, 11/06/2023 15:36 <br />Bicarbonate DUP 166.02 2.0 10162.682321035-16 mg/L 3 <br />Carbonate DUP ND 10ND2321035-16 mg/L 3 <br />QC Batch ID: B177838 Used client sample: Y - Description: AMW-21S, 11/06/2023 09:30 <br />Chloride DUP 20.312 0.1 1020.2872321035-01 mg/L 4 <br />MS 75.122 80 - 12020.287 50.505 1092321035-01 mg/L 5 <br />MSD 75.773 0.9 10 80 - 12020.287 50.505 1102321035-01 mg/L 6 <br />Nitrate as N DUP 7.6210 0.1 107.61202321035-01 mg/L 4 <br />MS 12.739 80 - 1207.6120 5.0505 1022321035-01 mg/L 5 <br />MSD 12.752 0.1 10 80 - 1207.6120 5.0505 1022321035-01 mg/L 6 <br />Sulfate DUP 34.913 0.4 1035.0562321035-01 mg/L 4 <br />MS 145.42 80 - 12035.056 101.01 1092321035-01 mg/L 5 <br />MSD 144.98 0.3 10 80 - 12035.056 101.01 1092321035-01 mg/L 6 <br />QC Batch ID: B177845 Used client sample: Y - Description: AMW-23M, 11/06/2023 11:36 <br />Chloride DUP 23.189 0.1 1023.2222321035-11 mg/L 7 <br />MS 80.547 80 - 12023.222 50.505 1142321035-11 mg/L 8 <br />MSD 80.470 0.1 10 80 - 12023.222 50.505 1132321035-11 mg/L 9 <br />Nitrate as N DUP 2.9130 0.7 102.93202321035-11 mg/L 7 <br />MS 8.2354 80 - 1202.9320 5.0505 1052321035-11 mg/L 8 <br />MSD 8.2364 0.0 10 80 - 1202.9320 5.0505 1052321035-11 mg/L 9 <br />Sulfate DUP 45.693 0.5 1045.9352321035-11 mg/L 7 <br />MS 157.48 80 - 12045.935 101.01 1102321035-11 mg/L 8 <br />MSD 157.06 0.3 10 80 - 12045.935 101.01 1102321035-11 mg/L 9 <br />QC Batch ID: B177939 Used client sample: Y - Description: AMW-21S, 11/06/2023 09:30 <br />Dissolved Calcium DUP 45.916 1.7 2046.7012321035-01 mg/L 10 <br />MS 54.007 75 - 12546.701 10.204 71.6 A032321035-01 mg/L 11 <br />MSD 55.149 2.1 20 75 - 12546.701 10.204 82.82321035-01 mg/L 12 <br />Dissolved Magnesium DUP 22.320 0.5 2022.2192321035-01 mg/L 10 <br />MS 32.452 75 - 12522.219 10.204 1002321035-01 mg/L 11 <br />MSD 32.628 0.5 20 75 - 12522.219 10.204 1022321035-01 mg/L 12 <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 108 of 115Report ID: 1001475032