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ENYIRCNMENTA! BCIEHCEB <br />Arcadis- SLO Reported: 02/07/2023 16:21 <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 />Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals R# <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 />Report ID: 1001395812 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 27 of 32 <br />QC Batch ID: B158281 <br />Used client sample: <br />N <br />Bicarbonate <br />DUP 2302154-01 <br />279.73 <br />281.58 <br />mg/L <br />0.7 <br />10 <br />1 <br />Carbonate <br />DUP 2302154-01 <br />ND <br />ND <br />mg/L <br />10 <br />1 <br />QC Batch ID: B159003 <br />Used client sample: <br />N <br />Dissolved Calcium <br />DUP 2302084-02 <br />281.55 <br />287.88 <br />mg/L <br />2.2 <br />20 <br />2 <br />MS 2302084-02 <br />281.55 <br />316.16 <br />20.408 <br />mg/L <br />170 <br />75-125 <br />A03 3 <br />MSD 2302084-02 <br />281.55 <br />312.24 <br />20.408 <br />mg/L <br />1.2 <br />150 <br />20 <br />75-125 <br />A03 4 <br />Dissolved Magnesium <br />DUP 2302084-02 <br />198.01 <br />197.11 <br />mg/L <br />0.5 <br />20 <br />2 <br />MS 2302084-02 <br />198.01 <br />221.90 <br />20.408 <br />mg/L <br />117 <br />75-125 <br />3 <br />MSD 2302084-02 <br />198.01 <br />217.35 <br />20.408 <br />mg/L <br />2.1 <br />94.8 <br />20 <br />75-125 <br />4 <br />Dissolved Sodium <br />DUP 2302084-02 <br />983.66 <br />929.67 <br />mg/L <br />5.6 <br />20 <br />2 <br />MS 2302084-02 <br />983.66 <br />995.05 <br />20.408 <br />mg/L <br />55.8 <br />75-125 <br />A03 3 <br />MSD 2302084-02 <br />983.66 <br />971.61 <br />20.408 <br />mg/L <br />2.4 <br />-59.0 <br />20 <br />75-125 <br />A03 4 <br />Dissolved Potassium <br />DUP 2302084-02 <br />6.8486 <br />6.7789 <br />mg/L <br />1.0 <br />20 <br />2 <br />MS 2302084-02 <br />6.8486 <br />27.595 <br />20.408 <br />mg/L <br />102 <br />75-125 <br />3 <br />MSD 2302084-02 <br />6.8486 <br />27.701 <br />20.408 <br />mg/L <br />0.4 <br />102 <br />20 <br />75-125 <br />4 <br />QC Batch ID: 8159063 <br />Used client sample: Y - Description: <br />AMW-12, 01/31/2023 <br />15:29 <br />Chloride <br />DUP !302181-02RE' <br />60.466 <br />62.014 <br />mg/L <br />2.5 <br />10 <br />5 <br />MS !302181-02RE' <br />60.466 <br />176.60 <br />101.01 <br />mg/L <br />115 <br />80-120 <br />6 <br />MSD !302181-02RE' <br />60.466 <br />176.22 <br />101.01 <br />mg/L <br />0.2 <br />115 <br />10 <br />80-120 <br />7 <br />Nitrate as N <br />DUP !302181-02RE' <br />25.386 <br />26.032 <br />mg/L <br />2.5 <br />10 <br />5 <br />MS !302181-02RE' <br />25.386 <br />36.800 <br />10.101 <br />mg/L <br />113 <br />80-120 <br />6 <br />MSD !302181-02RE' <br />25.386 <br />36.792 <br />10.101 <br />mg/L <br />0.0 <br />113 <br />10 <br />80-120 <br />7 <br />Sulfate <br />DUP !302181-02RE' <br />64.290 <br />65.634 <br />mg/L <br />2.1 <br />10 <br />5 <br />MS !302181-02RE' <br />64.290 <br />291.47 <br />202.02 <br />mg/L <br />112 <br />80-120 <br />6 <br />MSD !302181-02RE' <br />64.290 <br />290.62 <br />202.02 <br />mg/L <br />0.3 <br />112 <br />10 <br />80-120 <br />7 <br />QC Batch ID: 8159255 <br />Used client sample: <br />N <br />Total Dissolved Solids @ 180 C <br />DUP 2302273-01 <br />1340.0 <br />1380.0 <br />mg/L <br />2.9 <br />10 <br />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 />Report ID: 1001395812 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 27 of 32 <br />