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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:01/23/2025 17:34 <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: B202419 <br />Total Alkalinity as CaCO3 B202419-BS3 LCS 103.15 100.00 103 90 - 110mg/L 1 <br />QC Batch ID: B204443 <br />Chloride B204443-BS1 LCS 52.233 50.000 104 90 - 110mg/L 2 <br />Nitrate as N B204443-BS1 LCS 5.1783 5.0000 104 90 - 110mg/L 2 <br />Sulfate B204443-BS1 LCS 104.17 100.00 104 90 - 110mg/L 2 <br />QC Batch ID: B204449 <br />Dissolved Calcium B204449-BS1 LCS 10.256 10.000 103 80 - 120mg/L 3 <br />Dissolved Magnesium B204449-BS1 LCS 10.743 10.000 107 80 - 120mg/L 3 <br />Dissolved Sodium B204449-BS1 LCS 9.4260 10.000 94.3 80 - 120mg/L 3 <br />Dissolved Potassium B204449-BS1 LCS 10.268 10.000 103 80 - 120mg/L 3 <br />QC Batch ID: B204631 <br />Total Dissolved Solids @ 180 C B204631-BS1 LCS 555.00 586.00 94.7 90 - 110mg/L 4 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B202419-BS3 LCS EPA-310.1 ELR MET-1 101/17/25 01/17/25 10:20 <br /> 2 B204443-BS1 LCS EPA-300.0 OAE IC12 101/15/25 01/16/25 06:11 <br /> 3 B204449-BS1 LCS EPA-6010B NW1 ICP6 101/16/25 01/16/25 10:45 <br /> 4 B204631-BS1 LCS EPA-160.1 IJC MANUAL 501/20/25 01/20/25 15:15 <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 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 43 of 49Report ID: 1001565692