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ENYIRCNMENTA! BCIEHCEB <br />Arcadis- SLO Reported: 03/20/2023 11:27 <br />735 Tank Farm Rd, Suite 150 Project: Forward Landfill <br />San Luis Obispo, CA 93401 Project Number: 30110749.01 <br />Project Manager: Drew Feucht <br />Water Analysis (General Chemistry) <br />Quality Control Report - Precision & Accuracy <br />Control Limits <br />Source Source Spike Percent Percent Lab <br />:onstituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals RI <br />QC Batch ID: B158304 <br />Used client sample: N <br />Bicarbonate <br />DUP 2302766-01 1111.1 <br />1120.7 <br />mg/L <br />0.9 <br />10 <br />1 <br />Carbonate <br />DUP 2302766-01 ND <br />ND <br />mg/L <br />10 <br />1 <br />QC Batch ID: B158305 <br />Used client sample: Y - Description: AMW-22, 02/07/2023 13:33 <br />Bicarbonate <br />DUP 2302768-02 366.72 <br />366.34 <br />mg/L <br />0.1 <br />10 <br />2 <br />Carbonate <br />DUP 2302768-02 ND <br />ND <br />mg/L <br />10 <br />2 <br />QC Batch ID: B159526 <br />Used client sample: N <br />Chloride <br />DUP 2302698-05 41.445 <br />41.459 <br />mg/L <br />0.0 <br />10 <br />3 <br />MS 2302698-05 41.445 <br />97.365 <br />50.505 <br />mg/L <br />111 <br />80-120 <br />4 <br />MSD 2302698-05 41.445 <br />97.387 <br />50.505 <br />mg/L <br />0.0 <br />111 <br />10 <br />80-120 <br />5 <br />Nitrate as N <br />DUP 2302698-05 1.6930 <br />1.6900 <br />mg/L <br />0.2 <br />10 <br />3 <br />MS 2302698-05 1.6930 <br />7.5253 <br />5.0505 <br />mg/L <br />115 <br />80-120 <br />4 <br />MSD 2302698-05 1.6930 <br />7.5495 <br />5.0505 <br />mg/L <br />0.3 <br />116 <br />10 <br />80-120 <br />5 <br />Sulfate <br />DUP 2302698-05 34.165 <br />34.353 <br />mg/L <br />0.5 <br />10 <br />3 <br />MS 2302698-05 34.165 <br />149.66 <br />101.01 <br />mg/L <br />114 <br />80-120 <br />4 <br />MSD 2302698-05 34.165 <br />149.70 <br />101.01 <br />mg/L <br />0.0 <br />114 <br />10 <br />80-120 <br />5 <br />QC Batch ID: B159557 <br />Used client sample: Y - Description: AMW-2, 02/07/2023 11:03 <br />Dissolved Calcium <br />DUP 2302768-01 52.824 <br />54.226 <br />mg/L <br />2.6 <br />20 <br />6 <br />MS 2302768-01 52.824 <br />63.882 <br />10.204 <br />mg/L <br />108 <br />75-125 <br />7 <br />MSD 2302768-01 52.824 <br />64.327 <br />10.204 <br />mg/L <br />0.7 <br />113 <br />20 <br />75-125 <br />8 <br />Dissolved Magnesium <br />DUP 2302768-01 23.860 <br />23.494 <br />mg/L <br />1.5 <br />20 <br />6 <br />MS 2302768-01 23.860 <br />33.869 <br />10.204 <br />mg/L <br />98.1 <br />75-125 <br />7 <br />MSD 2302768-01 23.860 <br />34.460 <br />10.204 <br />mg/L <br />1.7 <br />104 <br />20 <br />75-125 <br />8 <br />Dissolved Sodium <br />DUP 2302768-01 38.869 <br />39.642 <br />mg/L <br />2.0 <br />20 <br />6 <br />MS 2302768-01 38.869 <br />50.355 <br />10.204 <br />mg/L <br />113 <br />75-125 <br />7 <br />MSD 2302768-01 38.869 <br />50.776 <br />10.204 <br />mg/L <br />0.8 <br />117 <br />20 <br />75- 125 <br />8 <br />Dissolved Potassium <br />DUP 2302768-01 6.2088 <br />6.2621 <br />mg/L <br />0.9 <br />20 <br />6 <br />MS 2302768-01 6.2088 <br />17.161 <br />10.204 <br />mg/L <br />107 <br />75-125 <br />7 <br />MSD 2302768-01 6.2088 <br />17.152 <br />10.204 <br />mg/L <br />0.1 <br />107 <br />20 <br />75-125 <br />8 <br />QC Batch ID: B159602 <br />Used client sample: N <br />Dissolved Sulfide <br />DUP 2302621-01 ND <br />ND <br />mg/L <br />10 <br />9 <br />MS 2302621-01 ND <br />0.52120 <br />0.50000 <br />mg/L <br />104 <br />80-120 <br />10 <br />MSD 2302621-01 ND <br />0.51204 <br />0.50000 <br />mg/L <br />1.8 <br />102 <br />10 <br />80-120 <br />11 <br />QC Batch ID: B159687 <br />Used client sample: N <br />Total Dissolved Solids @ 180 C <br />DUP 2302773-01 860.00 <br />880.00 <br />mg/L <br />2.3 <br />10 <br />12 <br />QC Batch ID: 6159820 <br />Used client sample: N <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 <br />Analytical assumes no responsibility for <br />report alteration, <br />separation, <br />detachment <br />or third party interpretation. <br />Report ID: 1001407430 <br />4100 Atlas Court Bakersfield, CA 93308 <br />(661) 327-4911 <br />FAX (661) 327-1918 www.pacelabs.com <br />Page 36 of 45 <br />