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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 />Metals Analysis <br />Source Lab <br />R# <br />QC Batch ID: B177939 Used client sample: Y - Description: AMW-21S, 11/06/2023 09:30 <br />Dissolved Strontium DUP 493.36 1.3 20499.872321035-01 ug/L 1 <br />MS 980.46 75 - 125499.87 510.20 94.22321035-01 ug/L 2 <br />MSD 1001.5 2.1 20 75 - 125499.87 510.20 98.32321035-01 ug/L 3 <br />QC Batch ID: B178082 Used client sample: N <br />Total Arsenic DUP ND 20ND2321133-02 ug/L 4 <br />MS 193.56 75 - 125ND200.00 96.82321133-02 ug/L 5 <br />MSD 177.95 8.4 20 75 - 125ND200.00 89.02321133-02 ug/L 6 <br />Total Iron DUP 5393.1 2.0 205500.02321133-02 ug/L 4 <br />MS 6456.3 75 - 1255500.0 1000.0 95.62321133-02 ug/L 5 <br />MSD 6127.7 5.2 20 75 - 1255500.0 1000.0 62.8 A032321133-02 ug/L 6 <br />Total Manganese DUP 1889.7 0.9 201905.82321133-02 ug/L 4 <br />MS 2263.8 75 - 1251905.8 500.00 71.6 Q032321133-02 ug/L 5 <br />MSD 2160.8 4.7 20 75 - 1251905.8 500.00 51.0 Q032321133-02 ug/L 6 <br />Run #QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B177939-DUP1 DUP EPA-6010B JRG2 PE-OP4 111/09/23 12/07/23 11:34 <br /> 2 B177939-MS1 MS EPA-6010B JRG2 PE-OP4 1.02011/09/23 12/07/23 11:38 <br /> 3 B177939-MSD1 MSD EPA-6010B JRG2 PE-OP4 1.02011/09/23 12/07/23 11:40 <br /> 4 B178082-DUP1 DUP EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:07 <br /> 4 B178082-DUP1 DUP EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:07 <br /> 4 B178082-DUP1 DUP EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:07 <br /> 5 B178082-MS1 MS EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:12 <br /> 5 B178082-MS1 MS EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:12 <br /> 5 B178082-MS1 MS EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:12 <br /> 6 B178082-MSD1 MSD EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:14 <br /> 6 B178082-MSD1 MSD EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:14 <br /> 6 B178082-MSD1 MSD EPA-6010B JRG PE-OP4 111/09/23 11/17/23 19:14 <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 114 of 115Report ID: 1001475032