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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/19/2023 12:29 <br /> 4119 Broad Street Suite 210 Project: Forward LF-Domestic Residential Sampling <br /> San Luis Obispo,CA 93401 Project Number: 2SA2023 Domestic Sampling <br /> Project Manager: Drew Feucht <br /> Volatile Organic Analysis (EPA Method 82606) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Run# <br /> QC Batch ID: B174129 <br /> Benzene B174129-BSI LCS 23.560 25.000 ug/L 94.2 70-130 1 <br /> B174129-BSD1 LCSD 24.910 25.000 ug/L 99.6 5.6 70-130 20 2 <br /> Bromodichloromethane B174129-BSI LCS 22.840 25.000 ug/L 91.4 70-130 1 <br /> B174129-BSD1 LCSD 23.890 25.000 ug/L 95.6 4.5 70-130 20 2 <br /> Chlorobenzene 8174129-BS1 LCS 22.960 25.000 ug/L 91.8 70-130 1 <br /> B174129-BSD1 LCSD 24.090 25.000 ug/L 96.4 4.8 70-130 20 2 <br /> Chloroethane B174129-BS1 LCS 22.020 25.000 ug/L 88.1 70-130 1 <br /> B174129-BSD1 LCSD 23.210 25.000 ug/L 92.8 5.3 70-130 20 2 <br /> 1,4-Dichlorobenzene B174129-BS1 LCS 22.510 25.000 ug/L 90.0 70-130 1 <br /> 8174129-BSD1 LCSD 24.040 25.000 ug/L 96.2 6.6 70-130 20 2 <br /> 1,1-Dichloroethane B174129-BS1 LCS 23.340 25.000 ug/L 93.4 70-130 1 <br /> 8174129-BSD1 LCSD 24.910 25.000 ug/L 99.6 6.5 70-130 20 2 <br /> 1,1-Dichloroethene B174129-BS1 LCS 24.040 25.000 ug/L 96.2 70-130 1 <br /> B174129-BSD1 LCSD 26.380 25.000 ug/L 106 9.3 70-130 20 2 <br /> Toluene B174129-BS1 LCS 22.320 25.000 ug/L 89.3 70-130 1 <br /> B174129-BSD1 LCSD 23.760 25.000 ug/L 95.0 6.3 70-130 20 2 <br /> Trichloroethene B174129-BSI LCS 20.580 25.000 ug/L 82.3 70-130 1 <br /> B174129-BSD1 LCSD 23.010 25.000 ug/L 92.0 11.1 70-130 20 2 <br /> 1,2-Dichloroethane-d4(Surrogate) 8174129-BS1 LCS 11.130 10.000 ug/L 111 75-125 1 <br /> B174129-BSD1 LCSD 10.900 10.000 ug/L 109 2.1 75-125 2 <br /> Toluene-d8(Surrogate) B174129-BS1 LCS 9.8500 10.000 ug/L 98.5 80-120 1 <br /> B174129-BSD1 LCSD 9.8400 10.000 ug/L 98.4 0.1 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) B174129-BS1 LCS 9.9400 10.000 ug/L 99.4 80-120 1 <br /> B174129-BSD1 LCSD 10.120 10.000 ug/L 101 1.8 80-120 2 <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: 1001456912 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 12 of 16 <br />