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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/25/2023 11:49 <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 - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent Lab <br /> Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals R# <br /> QC Batch ID: B174442 Used client sample: N <br /> Benzene MS 2318047-01 ND 22.000 25.000 ug/L 88.0 70-130 1 <br /> MSD 2318047-01 ND 21.700 25.000 ug/L 1.4 86.8 20 70-130 2 <br /> Bromodichloromethane MS 2318047-01 ND 28.830 25.000 ug/L 115 70-130 1 <br /> MSD 2318047-01 ND 28.470 25.000 ug/L 1.3 114 20 70-130 2 <br /> Chlorobenzene MS 2318047-01 ND 29.010 25.000 ug/L 116 70-130 1 <br /> MSD 2318047-01 ND 28.880 25.000 ug/L 0.4 116 20 70-130 2 <br /> Chloroethane MS 2318047-01 ND 28.370 25.000 ug/L 113 70-130 1 <br /> MSD 2318047-01 ND 28.490 25.000 ug/L 0.4 114 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2318047-01 ND 30.600 25.000 ug/L 122 70-130 1 <br /> MSD 2318047-01 ND 30.400 25.000 ug/L 0.7 122 20 70-130 2 <br /> 1,1-Dichloroethane MS 2318047-01 ND 21.320 25.000 ug/L 85.3 70-130 1 <br /> MSD 2318047-01 ND 21.290 25.000 ug/L 0.1 85.2 20 70-130 2 <br /> 1,1-Dichloroethene MS 2318047-01 ND 21.810 25.000 ug/L 87.2 70-130 1 <br /> MSD 2318047-01 ND 21.720 25.000 ug/L 0.4 86.9 20 70-130 2 <br /> Toluene MS 2318047-01 ND 26.070 25.000 ug/L 104 70-130 1 <br /> MSD 2318047-01 ND 25.890 25.000 ug/L 0.7 104 20 70-130 2 <br /> Trichloroethene MS 2318047-01 ND 23.050 25.000 ug/L 92.2 70-130 1 <br /> MSD 2318047-01 ND 23.220 25.000 ug/L 0.7 92.9 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2318047-01 ND 12.500 10.000 ug/L 125 75-125 1 <br /> MSD 2318047-01 ND 12.060 10.000 ug/L 3.6 121 75-125 2 <br /> Toluene-d8(Surrogate) MS 2318047-01 ND 10.070 10.000 ug/L 101 80-120 1 <br /> MSD 2318047-01 ND 9.9600 10.000 ug/L 1.1 99.6 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2318047-01 ND 11.080 10.000 ug/L 111 80-120 1 <br /> MSD 2318047-01 ND 11.100 10.000 ug/L 0.2 111 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: 1001457958 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 13 of 15 <br />