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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 />North County LF, SJ County-Leachate Sampling <br />631038217 <br />Sandra Pimienta <br />Reported:02/04/2025 10:07 <br />Pace Sample ID:2501235-04 Client Sample Name: <br />Constituent Result Units Method Bias Quals <br />MB Lab <br />Water Analysis (General Chemistry) <br />DCN <br />North County LF, L-5, L-5, 1/22/2025 11:55:00AM, Client <br />MDLPQL <br />Total Calcium mg/L S110.0151500.10 EPA-6010B 10.25 <br />Total Magnesium mg/L 0.019750.050 EPA-6010B 10.021 <br />Total Sodium mg/L 0.051741.0 EPA-6010B 10.22 <br />Total Potassium mg/L 0.132.9 1.0 EPA-6010B 1ND <br />Bicarbonate mg/L A101076010EPA-310.1 2ND <br />Carbonate mg/L A105.0ND5.0 EPA-310.1 2ND <br />Total Alkalinity as CaCO3 mg/L A108.26208.2 EPA-310.1 2ND <br />Chloride mg/L 0.131200.50 EPA-300.0 3ND <br />Nitrate as N mg/L 0.024ND0.10 EPA-300.0 3ND <br />Sulfate mg/L J0.140.44 1.0 EPA-300.0 3ND <br />Hardness as CaCO3 mg/L 0.106900.50 Calc 4ND <br />Total Dissolved Solids @ 180 C mg/L A102592050EPA-160.1 5ND <br />Chemical Oxygen Demand mg O2/L J,A1043130250EPA-410.4 6ND <br />QC <br />Batch IDDilutionInstrumentAnalystDate/Time <br />Run <br />Prep DateMethodDCN Prep Method <br />01/27/25 17:15 01/28/25 11:55 NW1 ICP5 1 B205030EPA-6010B 1 EPA 3010A <br />01/27/25 08:00 01/27/25 13:25 ELR MET-1 2 B202439EPA-310.1 2 No Prep <br />01/23/25 20:00 01/24/25 07:40 OAE IC9 1 B204880EPA-300.0 3 No Prep <br />01/23/25 16:32 02/03/25 09:54 SPB Calc 1 B204874Calc 4 Calc <br />01/28/25 14:45 01/28/25 14:45 IJC MANUAL 5 B205054EPA-160.1 5 No Prep <br />01/24/25 07:10 01/24/25 07:10 JMN SPEC06 10 B204913EPA-410.4 6 EPA 410.4 <br />DCN = Data Continuation Number <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 29 of 40Report ID: 1001567776