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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/26/2023 13:28 <br /> 4119 Broad Street Suite 210 Project: Forward LF-Domestic Residential Sampling <br /> San Luis Obispo,CA 93401 Project Number: [none] <br /> Project Manager: Zina Kamal <br /> Volatile Organic Analysis (EPA Method 82606) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent QC Sample ID MB Result Units PQL MDL Lab Quals Run# <br /> QC Batch ID: B174443 <br /> Tetrachloroethene B174443-BLK1 ND ug/L 0.50 0.13 1 <br /> Toluene B174443-BLK1 ND ug/L 0.50 0.093 1 <br /> 1,2,4-Trichlorobenzene B174443-BLK1 ND ug/L 0.50 0.19 1 <br /> 1,1,1-Trichloroethane 8174443-BLK1 ND ug/L 0.50 0.11 1 <br /> 1,1,2-Trichloroethane B174443-BLK1 ND ug/L 0.50 0.16 1 <br /> Trichloroethene 8174443-BLK1 ND ug/L 0.50 0.085 1 <br /> Trichlorofluoromethane B174443-BLK1 ND ug/L 0.50 0.13 1 <br /> 1,2,3-Trichloropropane B174443-BLK1 ND ug/L 1.0 0.24 1 <br /> Vinyl chloride B174443-BLK1 ND ug/L 0.50 0.12 1 <br /> Total Xylenes B174443-BLK1 ND ug/L 1.0 0.36 1 <br /> Acetone 8174443-BLK1 ND ug/L 10 4.6 1 <br /> Acrylonitrile B174443-BLK1 ND ug/L 5.0 1.2 1 <br /> t-Amyl Methyl ether 8174443-BLK1 ND ug/L 0.50 0.25 1 <br /> t-Butyl alcohol B174443-BLK1 ND ug/L 10 9.4 1 <br /> Carbon disulfide 8174443-BLK1 ND ug/L 1.0 0.38 1 <br /> trans-1,4-Dichloro-2-butene B174443-BLK1 ND ug/L 5.0 1.4 1 <br /> Diisopropyl ether 8174443-BLK1 ND ug/L 0.50 0.23 1 <br /> Ethanol B174443-BLK1 ND ug/L 250 50 1 <br /> Ethyl t-butyl ether 8174443-BLK1 ND ug/L 0.50 0.18 1 <br /> 2-Hexanone B174443-BLK1 ND ug/L 10 3.4 1 <br /> Methyl ethyl ketone B174443-BLK1 ND ug/L 10 2.5 1 <br /> Methyl iodide B174443-BLK1 ND ug/L 2.0 0.47 1 <br /> Methyl isobutyl ketone B174443-BLK1 ND ug/L 10 2.1 1 <br /> Vinyl acetate B174443-BLK1 ND ug/L 10 1.8 1 <br /> 1,2-Dichloroethane-d4(Surrogate) 6174443-BLK7 99.6 % 75-125 (LCL-UCL) 1 <br /> Toluene-d8(Surrogate) 6174443-BLK7 98.8 % 80-120 (LCL-UCL) 1 <br /> 4-Bromofluorobenzene(Surrogate) 6174443-BLK7 100 % 80-120 (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: 1001458265 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 9 of 15 <br />