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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:02/13/2025 14:18 <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: B204997 <br />Vinyl acetate B204997-BLK1 10NDug/L 1.8 1 <br />1,2-Dichloroethane-d4 (Surrogate)B204997-BLK1 105 %75 - 125 (LCL - UCL) 1 <br />Toluene-d8 (Surrogate)B204997-BLK1 101 %80 - 120 (LCL - UCL) 1 <br />4-Bromofluorobenzene (Surrogate)B204997-BLK1 99.7 %80 - 120 (LCL - UCL) 1 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B204997-BLK1 PB EPA-8260B AGB MS-V20 101/27/25 01/27/25 11:51 <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 19 of 28Report ID: 1001569791