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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 19:39 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-Air Samples <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1 Q26 Soil Vapor <br /> Project Manager: Dalia Rumani <br /> Volatile Organic Compounds by GC/MS (EPA Method TO-15) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent QC Sample ID MB Result Units PQL MDL Lab Quals Run# <br /> QC Batch ID: B229888 <br /> Ethyl acetate B229888-BLK1 ND ug/m3Air 0.72 0.23 1 <br /> Ethylbenzene B229888-BLK1 ND ug/m3Air 0.87 0.22 1 <br /> 1-Ethyl-4-methyl benzene B229888-BLK1 ND ug/m3Air 0.98 0.28 1 <br /> n-Heptane B229888-BLK1 ND ug/m3Air 0.82 0.30 1 <br /> Hexachlorobutadiene B229888-BLK1 ND ug/m3Air 2.1 0.66 1 <br /> Hexane B229888-BLK1 ND ug/m3Air 0.70 0.16 1 <br /> 2-Hexanone B229888-BLK1 ND ug/m3Air 0.82 0.45 1 <br /> Isopropyl alcohol B229888-BLK1 ND ug/m3Air 1.2 0.22 1 <br /> Methylene chloride B229888-BLK1 ND ug/m3Air 1.7 0.42 1 <br /> Methyl ethyl ketone B229888-BLK1 ND ug/m3Air 0.59 0.18 1 <br /> Methyl isobutyl ketone B229888-BLK1 ND ug/m3Air 0.82 0.23 1 <br /> Methyl t-butyl ether B229888-BLK1 ND ug/m3 Air 0.72 0.14 1 <br /> Propylene B229888-BLK1 ND ug/m3Air 0.34 0.16 1 <br /> Styrene B229888-BLK1 ND ug/m3Air 0.85 0.29 1 <br /> 1,1,2,2-Tetrachloroethane B229888-BLK1 ND ug/m3Air 1.4 0.35 1 <br /> Tetrachloroethene B229888-BLK1 ND ug/m3Air 1.4 0.35 1 <br /> Tetrahydrofuran B229888-BLK1 ND ug/m3Air 0.59 0.18 1 <br /> Toluene B229888-BLK1 ND ug/m3Air 0.75 0.18 1 <br /> 1,2,4-Trichlorobenzene B229888-BLK1 ND ug/m3Air 3.7 0.47 1 <br /> 1,1,1-Trichloroethane B229888-BLK1 ND ug/m3Air 1.1 0.23 1 <br /> 1,1,2-Trichloroethane B229888-BLK1 ND ug/m3Air 1.1 0.26 1 <br /> Trichloroethene B229888-BLK1 ND ug/m3Air 1.1 0.35 1 <br /> Trichlorofluoromethane B229888-BLK1 ND ug/m3Air 1.1 0.19 1 <br /> 1,1,2-Trichloro-1,2,24rifluoroethane B229888-BLK1 ND ug/m3Air 1.5 0.37 1 <br /> 1,2,4-Trimethylbenzene B229888-BLK1 ND ug/m3Air 0.98 0.32 1 <br /> 1,3,5-Trimethylbenzene B229888-BLK1 ND ug/m3Air 0.98 0.41 1 <br /> Vinyl acetate B229888-BLK1 ND ug/m3Air 0.70 0.16 1 <br /> Vinyl chloride B229888-BLK1 ND ug/m3Air 0.51 0.082 1 <br /> p-&m-Xylenes B229888-BLK1 ND ug/m3 Air 1.7 0.38 1 <br /> o-Xylene B229888-BLK1 ND ug/m3Air 0.87 0.24 1 <br /> Total Xylenes B229888-BLK1 ND ug/m3Air 2.6 0.65 1 <br /> 4-Bromofluorobenzene(Surrogate) B229888-BLKI 98.9 % 70-130 (LCL-UCL) 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 /> Report ID: 1001665764 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 16 of 19 <br />