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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:01/20/2025 17:15 <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: B204313 <br />Tetrachloroethene B204313-BLK1 0.50NDug/L 0.13 1 <br />Toluene B204313-BLK1 0.50NDug/L 0.093 1 <br />1,2,4-Trichlorobenzene B204313-BLK1 0.50NDug/L 0.19 1 <br />1,1,1-Trichloroethane B204313-BLK1 0.50NDug/L 0.11 1 <br />1,1,2-Trichloroethane B204313-BLK1 0.50NDug/L 0.16 1 <br />Trichloroethene B204313-BLK1 0.50NDug/L 0.085 1 <br />Trichlorofluoromethane B204313-BLK1 0.50NDug/L 0.13 1 <br />1,2,3-Trichloropropane B204313-BLK1 1.0NDug/L 0.24 1 <br />Vinyl chloride B204313-BLK1 0.50NDug/L 0.12 1 <br />Total Xylenes B204313-BLK1 1.0NDug/L 0.36 1 <br />Acetone B204313-BLK1 10NDug/L 4.6 1 <br />Acrylonitrile B204313-BLK1 5.0NDug/L 1.2 1 <br />t-Amyl Alcohol B204313-BLK1 20NDug/L 9.2 1 <br />t-Butyl alcohol B204313-BLK1 10NDug/L 9.4 1 <br />Carbon disulfide B204313-BLK1 1.0NDug/L 0.38 1 <br />trans-1,4-Dichloro-2-butene B204313-BLK1 5.0NDug/L 1.4 1 <br />Diisopropyl ether B204313-BLK1 0.50NDug/L 0.23 1 <br />Ethanol B204313-BLK1 250NDug/L 50 1 <br />Ethyl t-butyl ether B204313-BLK1 0.50NDug/L 0.18 1 <br />Hexachloroethane B204313-BLK1 0.50NDug/L 0.16 1 <br />2-Hexanone B204313-BLK1 10NDug/L 3.4 1 <br />Methyl ethyl ketone B204313-BLK1 10NDug/L 2.5 1 <br />Methyl iodide B204313-BLK1 2.0NDug/L 0.47 1 <br />Methyl isobutyl ketone B204313-BLK1 10NDug/L 2.1 1 <br />Vinyl acetate B204313-BLK1 10NDug/L 1.8 1 <br />1,2-Dichloroethane-d4 (Surrogate)B204313-BLK1 109 %75 - 125 (LCL - UCL) 1 <br />Toluene-d8 (Surrogate)B204313-BLK1 97.9 %80 - 120 (LCL - UCL) 1 <br />4-Bromofluorobenzene (Surrogate)B204313-BLK1 102 %80 - 120 (LCL - UCL) 1 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B204313-BLK1 PB EPA-8260B AGB MS-V21 101/15/25 01/15/25 11:40 <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 17 of 27Report ID: 1001564826