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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 />Case Narrative <br />Sample Analyte Flag <br />Method Blanks <br />Total CalciumB205030-BLK1 0.25160 mg/LEPA-6010B (Total) <br />Total MagnesiumB205030-BLK1 0.021000 mg/LEPA-6010B (Total) <br />Total SodiumB205030-BLK1 0.22220 mg/LEPA-6010B (Total) <br />Total CalciumB205030-BLK1 M01EPA-6010B (Total) <br />Matrix Spikes <br />Total SodiumB205030-MS1 A03EPA-6010B (Total) <br />LCS <br />The LCS recoveries are within QC limits. <br />Discussion <br />Summary of Flags <br />A03 The sample concentration was more than 4 times the spike level. <br />A10 Detection and quantitation limits were raised due to matrix interference. <br />M01 Analyte detected in the Method Blank at or above the PQL. <br />S11 The analyte in the Method Blank is greater than the laboratory PQL but the sample result is greater than 10 times the <br />Method Blank. <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 9 of 40Report ID: 1001567776