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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 12:02 <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 - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Run# <br /> QC Batch ID: B226623 <br /> Chloride B226623-BS1 LCS 51.192 50.000 mg/L 102 90-110 1 <br /> Nitrate as N B226623-BS1 LCS 5.0880 5.0000 mg/L 102 90-110 1 <br /> Sulfate B226623-BS1 LCS 101.03 100.00 mg/L 101 90-110 1 <br /> QC Batch ID: B226636 <br /> Chloride B226636-BS1 LCS 51.096 50.000 mg/L 102 90-110 2 <br /> Nitrate as N B226636-BS1 LCS 5.0630 5.0000 mg/L 101 90-110 2 <br /> Sulfate B226636-BS1 LCS 100.84 100.00 mg/L 101 90-110 2 <br /> QC Batch ID: B226693 <br /> Dissolved Calcium B226693-BS1 LCS 9.9430 10.000 mg/L 99.4 80-120 3 <br /> Dissolved Magnesium B226693-BS1 LCS 9.6385 10.000 mg/L 96.4 80-120 3 <br /> Dissolved Sodium B226693-BS1 LCS 9.5557 10.000 mg/L 95.6 80-120 3 <br /> Dissolved Potassium B226693-BS1 LCS 9.5820 10.000 mg/L 95.8 80-120 3 <br /> QC Batch ID: B226868 <br /> Total Alkalinity as CaCO3 B226868-BS3 LCS 99.340 100.00 mg/L 99.3 90-110 4 <br /> QC Batch ID: B226869 <br /> Total Alkalinity as CaCO3 B226869-BS3 LCS 104.67 100.00 mg/L 105 90-110 5 <br /> QC Batch ID: B226905 <br /> Total Dissolved Solids @ 180 C B226905-BS1 LCS 595.00 586.00 mg/L 102 90-110 6 <br /> QC Batch ID: B226906 <br /> Total Dissolved Solids @ 180 C B226906-BS1 LCS 585.00 586.00 mg/L 99.8 90-110 7 <br /> QC Batch ID: B226972 <br /> Dissolved Sulfide B226972-BS1 LCS 0.50237 0.50000 mg/L 100 90-110 8 <br /> B226972-BSD1 LCSD 0.49646 0.50000 mg/L 99.3 1.2 90-110 200 9 <br /> QC Batch ID: B226973 <br /> Dissolved Sulfide B226973-BS1 LCS 0.50631 0.50000 mg/L 101 90-110 10 <br /> B226973-BSD1 LCSD 0.49449 0.50000 mg/L 98.9 2.4 90-110 200 11 <br /> QC Batch ID: B226974 <br /> Dissolved Sulfide B226974-BSI LCS 0.51419 0.50000 mg/L 103 90-110 12 <br /> B226974-BSD1 LCSD 0.50828 0.50000 mg/L 102 1.2 90-110 200 13 <br /> QC Batch ID: B227221 <br /> Dissolved Cyanide B227221-BS1 LCS 0.14166 0.15000 mg/L 94.4 90-110 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 /> Report ID: 1001665842 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 99 of 109 <br />