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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 11:46 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1Q26 Groundwater Monitoring Wells <br /> Project Manager: Dalia Rumani <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 /> QC Batch ID: B227055 Used client sample: N <br /> Carbonate DUP 2601896-01 ND ND mg/L 10 13 <br /> QC Batch ID: B227056 Used client sample: Y- Description: AMW-51 S, 02/05/2026 09:43 <br /> Bicarbonate DUP 2601898-04 397.51 410.68 mg/L 3.3 10 14 <br /> Carbonate DUP 2601898-04 ND ND mg/L 10 14 <br /> QC Batch ID: B227114 Used client sample: Y-Description: AMW-2, 02/05/2026 13:00 <br /> Bicarbonate DUP 2601898-16 222.77 231.13 mg/L 3.7 10 15 <br /> Carbonate DUP 2601898-16 ND ND mg/L 10 15 <br /> QC Batch ID: B227221 Used client sample: N <br /> Dissolved Cyanide DUP 2601733-12 ND ND mg/L 10 16 <br /> MS 2601733-12 ND 0.094960 0.10000 mg/L 95.0 90-110 17 <br /> MSD 2601733-12 ND 0.098120 0.10000 mg/L 3.3 98.1 20 90-110 18 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226784-DUP1 DUP EPA-300.0 02/06/26 02/06/2619:08 PRE IC5 2 <br /> 2 B226784-MS1 MS EPA-300.0 02/06/26 02/06/2619:26 PRE IC5 2.020 <br /> 3 B226784-MSD1 MSD EPA-300.0 02/06/26 02/06/2619:44 PRE IC5 2.020 <br /> 4 B226785-DUP1 DUP EPA-300.0 02/06/26 02/06/2615:51 PRE IC5 1 <br /> 5 B226785-MS1 MS EPA-300.0 02/06/26 02/06/2616:09 PRE IC5 1.010 <br /> 6 B226785-MSD1 MSD EPA-300.0 02/06/26 02/06/2617:03 PRE IC5 1.010 <br /> 7 B226888-DUP1 DUP EPA-6010B 02/09/26 02/09/26 20:55 JEH ICP6 1 <br /> 8 B226888-MS1 MS EPA-6010B 02/09/26 02/09/26 20:59 JEH ICP6 1.020 <br /> 9 B226888-MSD1 MSD EPA-6010B 02/09/26 02/09/26 21:00 JEH ICP6 1.020 <br /> 10 B226896-DUP1 DUP SM-450OSD 02/09/26 02/09/2611:45 JT3 SPEC06 1 <br /> 11 B226896-MS1 MS SM-450OSD 02/09/26 02/09/2611:45 JT3 SPEC06 1 <br /> 12 B226896-MSD1 MSD SM-450OSD 02/09/26 02/09/2611:45 JT3 SPEC06 1 <br /> 13 B227055-DUP1 DUP EPA-310.1 02/11/26 02/11/2614:28 JMH2 MET-1 2 <br /> 14 B227056-DUP1 DUP EPA-310.1 02/11/26 02/11/2617:00 JMH2 MET-1 1 <br /> 15 B227114-DUP1 DUP EPA-310.1 02/12/26 02/12/26 09:50 JMH2 MET-1 1 <br /> 16 B227221-DUP1 DUP EPA-9010C 02/13/26 02/13/2615:12 RC1 KONE-1 1 <br /> 17 B227221-MS1 MS EPA-9010C 02/13/26 02/13/2615:12 RC1 KONE-1 1 <br /> 18 B227221-MSD1 MSD EPA-9010C 02/13/26 02/13/2615:12 RC1 KONE-1 1 <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 1001665835 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 111 of 116 <br />