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ENYIRCNMENTA! BCIEHCEB <br />Arcadis- SLO Reported: 02/13/2023 10:48 <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 R <br />QC Batch ID: B158291 <br />Used client sample: <br />N <br />Bicarbonate <br />DUP 2302247-01 <br />133.18 <br />134.67 <br />mg/L <br />1.1 <br />10 <br />1 <br />Carbonate <br />DUP 2302247-01 <br />ND <br />ND <br />mg/L <br />10 <br />1 <br />QC Batch ID: B158292 <br />Used client sample: <br />Y - Description: AMW-25, 02/02/2023 13:07 <br />Bicarbonate <br />DUP 2302428-04 <br />245.97 <br />247.07 <br />mg/L <br />0.5 <br />10 <br />2 <br />Carbonate <br />DUP 2302428-04 <br />ND <br />ND <br />mg/L <br />10 <br />2 <br />QC Batch ID: B159269 <br />Used client sample: Y - Description: AMW-43m, 02/02/2023 09:57 <br />Chloride <br />DUP 2302428-01 <br />9.7870 <br />9.7740 <br />mg/L <br />0.1 <br />10 <br />3 <br />MS 2302428-01 <br />9.7870 <br />62.690 50.505 <br />mg/L <br />105 <br />80-120 <br />4 <br />MSD 2302428-01 <br />9.7870 <br />62.972 50.505 <br />mg/L <br />0.4 <br />105 <br />10 <br />80-120 <br />5 <br />Nitrate as N <br />DUP 2302428-01 <br />0.48300 <br />0.48200 <br />mg/L <br />0.2 <br />10 <br />3 <br />MS 2302428-01 <br />0.48300 <br />5.6000 5.0505 <br />mg/L <br />101 <br />80-120 <br />4 <br />MSD 2302428-01 <br />0.48300 <br />5.5949 5.0505 <br />mg/L <br />0.1 <br />101 <br />10 <br />80-120 <br />5 <br />Sulfate <br />DUP 2302428-01 <br />16.290 <br />16.257 <br />mg/L <br />0.2 <br />10 <br />3 <br />MS 2302428-01 <br />16.290 <br />125.10 101.01 <br />mg/L <br />108 <br />80-120 <br />4 <br />MSD 2302428-01 <br />16.290 <br />124.90 101.01 <br />mg/L <br />0.2 <br />108 <br />10 <br />80-120 <br />5 <br />QC Batch ID: 8159285 <br />Used client sample: Y - Description: AMW-43m, 02/02/2023 09:57 <br />Dissolved Calcium <br />DUP 2302428-01 <br />34.465 <br />35.230 <br />mg/L <br />2.2 <br />20 <br />6 <br />MS 2302428-01 <br />34.465 <br />45.852 10.204 <br />mg/L <br />112 <br />75-125 <br />7 <br />MSD 2302428-01 <br />34.465 <br />45.988 10.204 <br />mg/L <br />0.3 <br />113 <br />20 <br />75-125 <br />8 <br />Dissolved Magnesium <br />DUP 2302428-01 <br />15.964 <br />16.301 <br />mg/L <br />2.1 <br />20 <br />6 <br />MS 2302428-01 <br />15.964 <br />26.271 10.204 <br />mg/L <br />101 <br />75-125 <br />7 <br />MSD 2302428-01 <br />15.964 <br />26.687 10.204 <br />mg/L <br />1.6 <br />105 <br />20 <br />75-125 <br />8 <br />Dissolved Sodium <br />DUP 2302428-01 <br />46.770 <br />47.371 <br />mg/L <br />1.3 <br />20 <br />6 <br />MS 2302428-01 <br />46.770 <br />57.573 10.204 <br />mg/L <br />106 <br />75-125 <br />7 <br />MSD 2302428-01 <br />46.770 <br />58.191 10.204 <br />mg/L <br />1.1 <br />112 <br />20 <br />75- 125 <br />8 <br />Dissolved Potassium <br />DUP 2302428-01 <br />3.6567 <br />3.6155 <br />mg/L <br />1.1 <br />20 <br />6 <br />MS 2302428-01 <br />3.6567 <br />14.316 10.204 <br />mg/L <br />104 <br />75-125 <br />7 <br />MSD 2302428-01 <br />3.6567 <br />14.348 10.204 <br />mg/L <br />0.2 <br />105 <br />20 <br />75-125 <br />8 <br />QC Batch ID: B159418 <br />Used client sample: <br />Y - Description: AMW-44, 02/02/2023 10:44 <br />Total Dissolved Solids @ 180 C <br />DUP 2302428-02 <br />609.99 <br />609.99 <br />mg/L <br />0 <br />9 <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: 1001396965 <br />4100 Atlas Court Bakersfield, <br />CA 93308 <br />(661) 327-4911 FAX (661) 327-1918 www.pacelabs.com <br />Page 51 of 56 <br />