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APTIM - Solid Waste Department <br />4171 Essen Lane <br />Baton Rouge, LA 70809 <br />Project: <br />Project Number: <br />Project Manager: <br />Foothill Landfill, SJ County <br />631038217 <br />Sandra Pimienta <br />Reported:01/20/2025 17:15 <br />Quality Control Report - Laboratory Control Sample <br />Constituent <br />Control Limits <br />PercentPercentSpike <br />QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br />Water Analysis (General Chemistry) <br />Run # <br />Lab <br />QC Batch ID: B202413 <br />Total Alkalinity as CaCO3 B202413-BS3 LCS 102.84 100.00 103 90 - 110mg/L 1 <br />QC Batch ID: B204369 <br />Chloride B204369-BS1 LCS 50.744 50.000 101 90 - 110mg/L 2 <br />Nitrate as N B204369-BS1 LCS 5.0420 5.0000 101 90 - 110mg/L 2 <br />Sulfate B204369-BS1 LCS 101.18 100.00 101 90 - 110mg/L 2 <br />QC Batch ID: B204386 <br />Dissolved Calcium B204386-BS1 LCS 10.301 10.000 103 80 - 120mg/L 3 <br />Dissolved Magnesium B204386-BS1 LCS 10.601 10.000 106 80 - 120mg/L 3 <br />Dissolved Sodium B204386-BS1 LCS 10.726 10.000 107 80 - 120mg/L 3 <br />Dissolved Potassium B204386-BS1 LCS 10.199 10.000 102 80 - 120mg/L 3 <br />QC Batch ID: B204465 <br />Total Dissolved Solids @ 180 C B204465-BS1 LCS 550.00 586.00 93.9 90 - 110mg/L 4 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B202413-BS3 LCS EPA-310.1 ELR MET-1 101/16/25 01/16/25 09:03 <br /> 2 B204369-BS1 LCS EPA-300.0 ANN IC2 101/14/25 01/14/25 20:29 <br /> 3 B204386-BS1 LCS EPA-6010B JEH ICP5 101/15/25 01/15/25 11:47 <br /> 4 B204465-BS1 LCS EPA-160.1 IJC MANUAL 501/16/25 01/16/25 13:30 <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 />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 21 of 27Report ID: 1001564826