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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 />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: 8159557 <br />Used client sample: Y - Description: AMW-2, 02/07/2023 11:03 <br />Dissolved Strontium <br />DUP 2302768-01 527.76 <br />538.13 <br />ug/L <br />1.9 <br />20 <br />4 <br />MS 2302768-01 527.76 <br />1095.1 <br />510.20 <br />ug/L <br />111 <br />75-125 <br />5 <br />MSD 2302768-01 527.76 <br />1099.3 <br />510.20 <br />ug/L <br />0.4 <br />112 <br />20 <br />75-125 <br />6 <br />Dissolved Vanadium <br />DUP 2302768-01 23.120 <br />23.583 <br />ug/L <br />2.0 <br />20 <br />4 <br />MS 2302768-01 23.120 <br />222.75 <br />204.08 <br />ug/L <br />97.8 <br />75-125 <br />5 <br />MSD 2302768-01 23.120 <br />224.77 <br />204.08 <br />ug/L <br />0.9 <br />98.8 <br />20 <br />75-125 <br />6 <br />Dissolved Zinc <br />DUP 2302768-01 ND <br />ND <br />ug/L <br />20 <br />4 <br />MS 2302768-01 ND <br />556.23 <br />510.20 <br />ug/L <br />109 <br />75-125 <br />5 <br />MSD 2302768-01 ND <br />558.04 <br />510.20 <br />ug/L <br />0.3 <br />109 <br />20 <br />75-125 <br />6 <br />QC Batch ID: B159616 <br />Used client sample: N <br />Hexavalent Chromium <br />DUP 2302734-09 0.11100 <br />0.092000 <br />ug/L <br />18.7 <br />10 <br />J,A02 7 <br />MS 2302734-09 0.11100 <br />20.063 <br />20.202 <br />ug/L <br />98.8 <br />90-110 <br />8 <br />MSD 2302734-09 0.11100 <br />19.631 <br />20.202 <br />ug/L <br />2.2 <br />96.6 <br />10 <br />90-110 <br />9 <br />QC Batch ID: 8159659 <br />Used client sample: Y - Description: AMW-2, 02/07/2023 11:03 <br />Dissolved Arsenic <br />DUP 2302768-01 4.4430 <br />3.7740 <br />ug/L <br />16.3 <br />20 <br />10 <br />MS 2302768-01 4.4430 <br />107.39 <br />102.04 <br />ug/L <br />101 <br />70-130 <br />11 <br />MSD 2302768-01 4.4430 <br />108.03 <br />102.04 <br />ug/L <br />0.6 <br />102 <br />20 <br />70-130 <br />12 <br />Dissolved Selenium <br />DUP 2302768-01 0.64200 <br />0.32200 <br />ug/L <br />66.4 <br />20 <br />J,A02 10 <br />MS 2302768-01 0.64200 <br />112.30 <br />102.04 <br />ug/L <br />109 <br />70-130 <br />11 <br />MSD 2302768-01 0.64200 <br />112.18 <br />102.04 <br />ug/L <br />0.1 <br />109 <br />20 <br />70-130 <br />12 <br />Dissolved Thallium <br />DUP 2302768-01 ND <br />ND <br />ug/L <br />20 <br />10 <br />MS 2302768-01 ND <br />41.249 <br />40.816 <br />ug/L <br />101 <br />70-130 <br />11 <br />MSD 2302768-01 ND <br />41.349 <br />40.816 <br />ug/L <br />0.2 <br />101 <br />20 <br />70-130 <br />12 <br />Dissolved Tin <br />DUP 2302768-01 ND <br />ND <br />ug/L <br />20 <br />10 <br />MS 2302768-01 ND <br />37.512 <br />40.816 <br />ug/L <br />91.9 <br />70-130 <br />11 <br />MSD 2302768-01 ND <br />38.952 <br />40.816 <br />ug/L <br />3.8 <br />95.4 <br />20 <br />70-130 <br />12 <br />QC Batch ID: 8160020 <br />Used client sample: N <br />Dissolved Mercury <br />DUP 2302706-02 0.18425 <br />0.22475 <br />ug/L <br />19.8 <br />20 <br />13 <br />MS 2302706-02 0.18425 <br />1.1625 <br />1.0000 <br />ug/L <br />97.8 <br />70-130 <br />14 <br />MSD 2302706-02 0.18425 <br />1.1325 <br />1.0000 <br />ug/L <br />2.6 <br />94.8 <br />20 <br />70-130 <br />15 <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, 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 43 of 45 <br />