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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 />Quality Control Report - Method Blank Analysis <br />Constituent QC Sample ID MB Result Units Lab Quals <br />Volatile Organic Analysis (EPA Method 8260B) <br />Run #MDLPQL <br />QC Batch ID: B204915 <br />trans-1,3-Dichloropropene B204915-BLK1 0.50NDug/L 0.079 1 <br />Ethylbenzene B204915-BLK1 0.50NDug/L 0.098 1 <br />Hexachlorobutadiene B204915-BLK1 0.50NDug/L 0.17 1 <br />Isopropylbenzene B204915-BLK1 0.50NDug/L 0.14 1 <br />p-Isopropyltoluene B204915-BLK1 0.50NDug/L 0.12 1 <br />Methylene chloride B204915-BLK1 1.0NDug/L 0.48 1 <br />Methyl t-butyl ether B204915-BLK1 0.50NDug/L 0.11 1 <br />Naphthalene B204915-BLK1 0.50NDug/L 0.36 1 <br />n-Propylbenzene B204915-BLK1 0.50NDug/L 0.11 1 <br />Styrene B204915-BLK1 0.50NDug/L 0.068 1 <br />1,1,1,2-Tetrachloroethane B204915-BLK1 0.50NDug/L 0.18 1 <br />1,1,2,2-Tetrachloroethane B204915-BLK1 0.50NDug/L 0.17 1 <br />Tetrachloroethene B204915-BLK1 0.50NDug/L 0.13 1 <br />Toluene B204915-BLK1 0.50NDug/L 0.093 1 <br />1,2,3-Trichlorobenzene B204915-BLK1 0.50NDug/L 0.16 1 <br />1,2,4-Trichlorobenzene B204915-BLK1 0.50NDug/L 0.19 1 <br />1,1,1-Trichloroethane B204915-BLK1 0.50NDug/L 0.11 1 <br />1,1,2-Trichloroethane B204915-BLK1 0.50NDug/L 0.16 1 <br />Trichloroethene B204915-BLK1 0.50NDug/L 0.085 1 <br />Trichlorofluoromethane B204915-BLK1 0.50NDug/L 0.13 1 <br />1,2,3-Trichloropropane B204915-BLK1 1.0NDug/L 0.24 1 <br />1,1,2-Trichloro-1,2,2-trifluoroethane B204915-BLK1 0.50NDug/L 0.15 1 <br />1,2,4-Trimethylbenzene B204915-BLK1 0.50NDug/L 0.12 1 <br />1,3,5-Trimethylbenzene B204915-BLK1 0.50NDug/L 0.12 1 <br />Vinyl chloride B204915-BLK1 0.50NDug/L 0.12 1 <br />Total Xylenes B204915-BLK1 1.0NDug/L 0.36 1 <br />Acetone B204915-BLK1 10NDug/L 4.6 1 <br />Acrylonitrile B204915-BLK1 5.0NDug/L 1.2 1 <br />Carbon disulfide B204915-BLK1 1.0NDug/L 0.38 1 <br />trans-1,4-Dichloro-2-butene B204915-BLK1 5.0NDug/L 1.4 1 <br />2-Hexanone B204915-BLK1 10NDug/L 3.4 1 <br />Methyl ethyl ketone B204915-BLK1 10NDug/L 2.5 1 <br />Methyl iodide B204915-BLK1 2.0NDug/L 0.47 1 <br />Methyl isobutyl ketone B204915-BLK1 10NDug/L 2.1 1 <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 31 of 40Report ID: 1001567776