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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:02/07/2025 16:06 <br />Pace Sample ID:2501328-05 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-12, G-12, 1/23/2025 12:10:00PM, Client <br />MDLPQL <br />Dissolved Calcium mg/L 0.016200.10 EPA-6010B 1ND <br />Dissolved Magnesium mg/L 0.022110.050 EPA-6010B 1ND <br />Dissolved Sodium mg/L 0.051221.0 EPA-6010B 10.46 <br />Dissolved Potassium mg/L 0.106.2 1.0 EPA-6010B 1ND <br />Bicarbonate mg/L 5.01405.0 EPA-310.1 2ND <br />Carbonate Alkalinity as CaCO3 mg/L 4.1ND4.1 EPA-310.1 2ND <br />Total Alkalinity as CaCO3 mg/L 4.11104.1 EPA-310.1 2ND <br />Chloride mg/L 0.138.3 0.50 EPA-300.0 30.21 <br />Nitrate as N mg/L 0.0242.1 0.10 EPA-300.0 3ND <br />Sulfate mg/L 0.144.1 1.0 EPA-300.0 3ND <br />Dissolved Hardness as CaCO3 mg/L 0.10950.50 Calc 4ND <br />Total Dissolved Solids @ 180 C mg/L 5.020010 EPA-160.1 5ND <br />Chemical Oxygen Demand mg O2/L J4.36.2 25 EPA-410.4 6ND <br />QC <br />Batch IDDilutionInstrumentAnalystDate/Time <br />Run <br />Prep DateMethodDCN Prep Method <br />01/27/25 13:26 01/27/25 17:05 JRG ICP5 1 B205012EPA-6010B 1 6010B/No Digestion <br />01/28/25 08:00 01/28/25 11:12 ELR MET-1 1 B202442EPA-310.1 2 No Prep <br />01/24/25 18:00 01/24/25 22:14 RC1 IC5 1 B204959EPA-300.0 3 No Prep <br />01/24/25 18:33 02/07/25 15:20 SPB Calc 1 B204958Calc 4 Calc <br />01/30/25 13:30 01/30/25 13:30 IJC MANUAL 1 B205191EPA-160.1 5 No Prep <br />01/29/25 07:05 01/29/25 07:05 JMN SPEC06 1 B205106EPA-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 32 of 54Report ID: 1001568851