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Arcadis- SLO <br />4119 Broad Street Suite 210 <br />San Luis Obispo, CA 93401 <br />Project: <br />Project Number: <br />Project Manager: <br />Forward LF- Domestic Residential Sampling <br />[none] <br /> Zina Kamal <br />Reported:09/25/2023 11:50 <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: B174442 <br />Tetrachloroethene B174442-BLK1 0.50NDug/L 0.13 1 <br />Toluene B174442-BLK1 0.50NDug/L 0.093 1 <br />1,2,4-Trichlorobenzene B174442-BLK1 0.50NDug/L 0.19 1 <br />1,1,1-Trichloroethane B174442-BLK1 0.50NDug/L 0.11 1 <br />1,1,2-Trichloroethane B174442-BLK1 0.50NDug/L 0.16 1 <br />Trichloroethene B174442-BLK1 0.50NDug/L 0.085 1 <br />Trichlorofluoromethane B174442-BLK1 0.50NDug/L 0.13 1 <br />1,2,3-Trichloropropane B174442-BLK1 1.0NDug/L 0.24 1 <br />Vinyl chloride B174442-BLK1 0.50NDug/L 0.12 1 <br />Total Xylenes B174442-BLK1 1.0NDug/L 0.36 1 <br />Acetone B174442-BLK1 10NDug/L 4.6 1 <br />Acrylonitrile B174442-BLK1 5.0NDug/L 1.2 1 <br />t-Amyl Methyl ether B174442-BLK1 0.50NDug/L 0.25 1 <br />t-Butyl alcohol B174442-BLK1 10NDug/L 9.4 1 <br />Carbon disulfide B174442-BLK1 1.0NDug/L 0.38 1 <br />trans-1,4-Dichloro-2-butene B174442-BLK1 5.0NDug/L 1.4 1 <br />Diisopropyl ether B174442-BLK1 0.50NDug/L 0.23 1 <br />Ethanol B174442-BLK1 250NDug/L 50 1 <br />Ethyl t-butyl ether B174442-BLK1 0.50NDug/L 0.18 1 <br />2-Hexanone B174442-BLK1 10NDug/L 3.4 1 <br />Methyl ethyl ketone B174442-BLK1 10NDug/L 2.5 1 <br />Methyl iodide B174442-BLK1 2.0NDug/L 0.47 1 <br />Methyl isobutyl ketone B174442-BLK1 10NDug/L 2.1 1 <br />Vinyl acetate B174442-BLK1 10NDug/L 1.8 1 <br />1,2-Dichloroethane-d4 (Surrogate)B174442-BLK1 122 %75 - 125 (LCL - UCL) 1 <br />Toluene-d8 (Surrogate)B174442-BLK1 99.4 %80 - 120 (LCL - UCL) 1 <br />4-Bromofluorobenzene (Surrogate)B174442-BLK1 106 %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 />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 9 of 15Report ID: 1001457962