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BCIEHCEB <br />Arcadis- SLO Reported: 03/07/2023 11:54 <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 />Metals Analysis <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 />QC Batch ID: B159560 <br />Used <br />client sample: <br />Y - Description: <br />AMW-1, 02/03/2023 13:51 <br />Total Arsenic <br />DUP <br />QC <br />Batch ID: B159358 <br />Used client sample: Y - Description: AMW-1, 02/03/2023 13:51 <br />ug/L <br />24.2 <br />20 <br />Dissolved <br />Nickel <br />DUP <br />2302538-07 <br />3.7606 <br />3.7925 <br />25.630 <br />ug/L <br />0.8 <br />ug/L <br />20 <br />111 <br />J 4 <br />75-125 <br />MS <br />2302538-07 <br />3.7606 <br />484.04 <br />408.16 <br />ug/L <br />200.00 <br />118 <br />11.7 <br />75-125 <br />5 <br />75-125 <br />MSD <br />2302538-07 <br />3.7606 <br />468.76 <br />408.16 <br />ug/L <br />3.2 <br />114 <br />20 <br />75-125 <br />6 <br />Dissolved <br />Silver <br />DUP <br />2302538-07 <br />ND <br />ND <br />1614.3 <br />ug/L <br />1000.0 <br />ug/L <br />20 <br />93.0 <br />4 <br />75-125 <br />MS <br />2302538-07 <br />ND <br />103.39 <br />102.04 <br />ug/L <br />1000.0 <br />101 <br />3.7 <br />75-125 <br />5 <br />75-125 <br />MSD <br />2302538-07 <br />ND <br />100.52 <br />102.04 <br />ug/L <br />2.8 <br />98.5 <br />20 <br />75-125 <br />6 <br />Dissolved <br />Strontium <br />DUP <br />2302538-07 <br />631.95 <br />638.15 <br />1347.4 <br />ug/L <br />1.0 <br />ug/L <br />20 <br />134 <br />4 <br />75-125 <br />Q03 <br />MS <br />2302538-07 <br />631.95 <br />1235.6 <br />510.20 <br />ug/L <br />500.00 <br />118 <br />4.1 <br />75-125 <br />5 <br />75-125 <br />MSD <br />2302538-07 <br />631.95 <br />1216.0 <br />510.20 <br />ug/L <br />1.6 <br />114 <br />20 <br />75-125 <br />6 <br />Dissolved <br />Vanadium <br />DUP <br />2302538-07 <br />10.181 <br />10.115 <br />ug/L <br />0.6 <br />20 <br />4 <br />MS <br />2302538-07 <br />10.181 <br />223.33 <br />204.08 <br />ug/L <br />104 <br />75-125 <br />5 <br />MSD <br />2302538-07 <br />10.181 <br />222.48 <br />204.08 <br />ug/L <br />0.4 <br />104 <br />20 <br />75-125 <br />6 <br />Dissolved Zinc <br />DUP <br />2302538-07 <br />9.1830 <br />14.442 <br />ug/L <br />44.5 <br />20 <br />A02 4 <br />MS <br />2302538-07 <br />9.1830 <br />604.20 <br />510.20 <br />ug/L <br />117 <br />75-125 <br />5 <br />MSD <br />2302538-07 <br />9.1830 <br />584.86 <br />510.20 <br />ug/L <br />3.3 <br />113 <br />20 <br />75-125 <br />6 <br />QC <br />Batch ID: B159367 <br />Used client sample: <br />N <br />Dissolved <br />Arsenic <br />DUP <br />2302247-01 <br />8.2599 <br />8.0830 <br />ug/L <br />2.2 <br />20 <br />10 <br />MS <br />2302247-01 <br />8.2599 <br />115.14 <br />102.04 <br />ug/L <br />105 <br />70-130 <br />11 <br />MSD <br />2302247-01 <br />8.2599 <br />114.76 <br />102.04 <br />ug/L <br />0.3 <br />104 <br />20 <br />70-130 <br />12 <br />Dissolved <br />Selenium <br />DUP <br />2302247-01 <br />31.056 <br />31.940 <br />ug/L <br />2.8 <br />20 <br />10 <br />MS <br />2302247-01 <br />31.056 <br />141.82 <br />102.04 <br />ug/L <br />109 <br />70-130 <br />11 <br />MSD <br />2302247-01 <br />31.056 <br />143.35 <br />102.04 <br />ug/L <br />1.1 <br />110 <br />20 <br />70-130 <br />12 <br />Dissolved <br />Thallium <br />DUP <br />2302247-01 <br />ND <br />ND <br />ug/L <br />20 <br />10 <br />MS <br />2302247-01 <br />ND <br />37.247 <br />40.816 <br />ug/L <br />91.3 <br />70-130 <br />11 <br />MSD <br />2302247-01 <br />ND <br />38.641 <br />40.816 <br />ug/L <br />3.7 <br />94.7 <br />20 <br />70-130 <br />12 <br />Dissolved <br />Tin <br />DUP <br />2302247-01 <br />ND <br />ND <br />ug/L <br />20 <br />10 <br />MS <br />2302247-01 <br />ND <br />35.103 <br />40.816 <br />ug/L <br />86.0 <br />70-130 <br />11 <br />MSD <br />2302247-01 <br />ND <br />37.295 <br />40.816 <br />ug/L <br />6.1 <br />91.4 <br />20 <br />70-130 <br />12 <br />QC Batch ID: B159560 <br />Used <br />client sample: <br />Y - Description: <br />AMW-1, 02/03/2023 13:51 <br />Total Arsenic <br />DUP <br />2302538-07 <br />25.630 <br />20.088 <br />ug/L <br />24.2 <br />20 <br />J,A02 <br />13 <br />MS <br />2302538-07 <br />25.630 <br />248.39 <br />200.00 <br />ug/L <br />111 <br />75-125 <br />14 <br />MSD <br />2302538-07 <br />25.630 <br />220.85 <br />200.00 <br />ug/L <br />11.7 <br />97.6 <br />20 <br />75-125 <br />15 <br />Total Iron <br />DUP <br />2302538-07 <br />1614.3 <br />1302.8 <br />ug/L <br />21.4 <br />20 <br />Q01 <br />16 <br />MS <br />2302538-07 <br />1614.3 <br />2544.3 <br />1000.0 <br />ug/L <br />93.0 <br />75-125 <br />17 <br />MSD <br />2302538-07 <br />1614.3 <br />2451.6 <br />1000.0 <br />ug/L <br />3.7 <br />83.7 <br />20 <br />75-125 <br />18 <br />Total Manganese <br />DUP <br />2302538-07 <br />1347.4 <br />1332.3 <br />ug/L <br />1.1 <br />20 <br />16 <br />MS <br />2302538-07 <br />1347.4 <br />2016.5 <br />500.00 <br />ug/L <br />134 <br />75-125 <br />Q03 <br />17 <br />MSD <br />2302538-07 <br />1347.4 <br />1935.8 <br />500.00 <br />ug/L <br />4.1 <br />118 <br />20 <br />75-125 <br />18 <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: 1001403762 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 73 of 78 <br />