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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:13 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 <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: B226626 Used client sample: N <br /> Bicarbonate DUP 2601492-13 405.12 410.31 mg/L 1.3 10 13 <br /> Carbonate DUP 2601492-13 ND ND mg/L 10 13 <br /> Total Alkalinity as CaCO3 DUP 2601492-13 332.26 336.52 mg/L 1.3 10 13 <br /> QC Batch ID: B226627 Used client sample: Y- Description: AMW-63, 01/29/2026 14:36 <br /> Bicarbonate DUP 2601495-08 386.76 405.48 mg/L 4.7 10 14 <br /> Carbonate DUP 2601495-08 ND ND mg/L 10 14 <br /> Total Alkalinity as CaCO3 DUP 2601495-08 317.20 332.56 mg/L 4.7 10 14 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B226433-DUP1 DUP EPA-300.0 01/30/26 01/30/2611:35 PRE IC9 2 <br /> 2 B226433-MS1 MS EPA-300.0 01/30/26 01/30/2611:49 PRE IC9 2.020 <br /> 3 B226433-MSD1 MSD EPA-300.0 01/30/26 01/30/2612:02 PRE IC9 2.020 <br /> 4 B226447-DUP1 DUP EPA-300.0 01/30/26 01/30/2614:07 PRE IC12 1 <br /> 5 B226447-MS1 MS EPA-300.0 01/30/26 01/30/2614:20 PRE IC12 1.010 <br /> 6 B226447-MSD1 MSD EPA-300.0 01/30/26 01/30/2614:33 PRE IC12 1.010 <br /> 7 B226448-DUP1 DUP EPA-300.0 01/30/26 01/30/2614:26 OAE IC7 1 <br /> 8 B226448-MS1 MS EPA-300.0 01/30/26 01/30/2614:43 PRE IC7 1.010 <br /> 9 B226448-MSD1 MSD EPA-300.0 01/30/26 01/30/2615:01 PRE IC7 1.010 <br /> 10 B226477-DUP1 DUP EPA-6010B 02/02/26 02/02/2614:23 JRG ICP6 1 <br /> 11 B226477-MS1 MS EPA-6010B 02/02/26 02/02/2614:26 JRG ICP6 1.020 <br /> 12 B226477-MSD1 MSD EPA-6010B 02/02/26 02/02/2614:28 JRG ICP6 1.020 <br /> 13 B226626-DUP1 DUP EPA-310.1 02/04/26 02/04/2612:14 JMH2 MET-1 2 <br /> 14 B226627-DUP1 DUP EPA-310.1 02/04/26 02/04/2614:41 JMH2 MET-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: 1001665557 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 114 of 118 <br />