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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-Groundwater <br />631038217 <br />Sandra Pimienta <br />Reported:02/13/2025 14:18 <br />Pace Sample ID:2501242-01 Client Sample Name: <br />Constituent Result Units Method Bias Quals <br />MB Lab <br />Water Analysis (General Chemistry) <br />DCN <br />North County LF, G-13, G-13, 1/22/2025 11:50:00AM, Jon L. <br />MDLPQL <br />Dissolved Calcium mg/L 0.016160.10 EPA-6010B 1ND <br />Total Calcium mg/L 0.015160.10 EPA-200.7 20.033 <br />Dissolved Magnesium mg/L 0.0228.3 0.050 EPA-6010B 1ND <br />Total Magnesium mg/L 0.0198.7 0.050 EPA-200.7 2ND <br />Dissolved Sodium mg/L 0.051161.0 EPA-6010B 1ND <br />Dissolved Potassium mg/L 0.104.2 1.0 EPA-6010B 1ND <br />Bicarbonate mg/L 5.01105.0 EPA-310.1 3ND <br />Carbonate Alkalinity as CaCO3 mg/L 4.1ND4.1 EPA-310.1 3ND <br />Total Alkalinity as CaCO3 mg/L 4.1914.1 EPA-310.1 3ND <br />Chloride mg/L 0.136.8 0.50 EPA-300.0 4ND <br />Nitrate as N mg/L 0.0241.1 0.10 EPA-300.0 4ND <br />Sulfate mg/L 0.143.5 1.0 EPA-300.0 4ND <br />Dissolved Hardness as CaCO3 mg/L 0.10730.50 Calc 5ND <br />Hardness as CaCO3 mg/L 0.10750.50 Calc 6ND <br />Total Dissolved Solids @ 180 C mg/L 5.019010 EPA-160.1 7ND <br />Chemical Oxygen Demand mg O2/L 4.3ND25 EPA-410.4 8ND <br />QC <br />Batch IDDilutionInstrumentAnalystDate/Time <br />Run <br />Prep DateMethodDCN Prep Method <br />01/24/25 07:12 01/24/25 10:16 NW1 ICP5 1 B204891EPA-6010B 1 6010B/No Digestion <br />01/31/25 17:50 02/03/25 17:02 JEH ICP5 1 B205309EPA-200.7 2 EPA 3010A <br />01/27/25 08:00 01/27/25 13:59 ELR MET-1 1 B202439EPA-310.1 3 No Prep <br />01/23/25 20:00 01/24/25 00:35 OAE IC9 1 B204880EPA-300.0 4 No Prep <br />01/24/25 12:25 02/07/25 15:18 SPB Calc 1 B204877Calc 5 Calc <br />01/23/25 18:34 02/10/25 09:55 SPB Calc 1 B204877Calc 6 Calc <br />01/28/25 14:45 01/28/25 14:45 IJC MANUAL 1 B205054EPA-160.1 7 No Prep <br />01/29/25 07:05 01/29/25 07:05 JMN SPEC06 1 B205105EPA-410.4 8 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 12 of 28Report ID: 1001569791