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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:01/22/2025 17:07 <br />Case Narrative <br />Sample Analyte Flag <br />Method Blanks <br />SulfateB204443-BLK1 0.14260 mg/LEPA-300.0 <br />Total CalciumB204521-BLK1 0.021200 mg/LEPA-6010B (Total) <br />Total SodiumB204521-BLK1 0.068200 mg/LEPA-6010B (Total) <br />Total PotassiumB204521-BLK1 0.18290 mg/LEPA-6010B (Total) <br />Total ChromiumB204521-BLK1 1.8000 ug/LEPA-6010B (Total) <br />Total IronB204521-BLK1 30.700 ug/LEPA-6010B (Total) <br />Total MolybdenumB204521-BLK1 2.1000 ug/LEPA-6010B (Total) <br />Matrix Spikes <br />Total ChromiumB204521-DUP1 A02EPA-6010B (Total) <br />Total CalciumB204521-MS1 A03EPA-6010B (Total) <br />LCS <br />The LCS recoveries are within QC limits. <br />Discussion <br />Summary of Flags <br />A02 The difference between duplicate readings is less than the quantitation limit. <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 />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 8 of 40Report ID: 1001565394