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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 - 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: B174443 Used client sample: N <br /> Benzene MS 2318014-01 ND 20.420 25.000 ug/L 81.7 70-130 1 <br /> MSD 2318014-01 ND 20.730 25.000 ug/L 1.5 82.9 20 70-130 2 <br /> Bromodichloromethane MS 2318014-01 ND 25.690 25.000 ug/L 103 70-130 1 <br /> MSD 2318014-01 ND 26.520 25.000 ug/L 3.2 106 20 70-130 2 <br /> Chlorobenzene MS 2318014-01 ND 25.490 25.000 ug/L 102 70-130 1 <br /> MSD 2318014-01 ND 26.960 25.000 ug/L 5.6 108 20 70-130 2 <br /> Chloroethane MS 2318014-01 ND 26.490 25.000 ug/L 106 70-130 1 <br /> MSD 2318014-01 ND 26.850 25.000 ug/L 1.3 107 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2318014-01 ND 28.620 25.000 ug/L 114 70-130 1 <br /> MSD 2318014-01 ND 29.140 25.000 ug/L 1.8 117 20 70-130 2 <br /> 1,1-Dichloroethane MS 2318014-01 ND 19.740 25.000 ug/L 79.0 70-130 1 <br /> MSD 2318014-01 ND 20.060 25.000 ug/L 1.6 80.2 20 70-130 2 <br /> 1,1-Dichloroethene MS 2318014-01 ND 20.690 25.000 ug/L 82.8 70-130 1 <br /> MSD 2318014-01 ND 21.290 25.000 ug/L 2.9 85.2 20 70-130 2 <br /> Toluene MS 2318014-01 ND 23.470 25.000 ug/L 93.9 70-130 1 <br /> MSD 2318014-01 ND 24.330 25.000 ug/L 3.6 97.3 20 70-130 2 <br /> Trichloroethene MS 2318014-01 ND 20.910 25.000 ug/L 83.6 70-130 1 <br /> MSD 2318014-01 ND 21.680 25.000 ug/L 3.6 86.7 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2318014-01 ND 11.990 10.000 ug/L 120 75-125 1 <br /> MSD 2318014-01 ND 10.990 10.000 ug/L 8.7 110 75-125 2 <br /> Toluene-d8(Surrogate) MS 2318014-01 ND 9.8300 10.000 ug/L 98.3 80-120 1 <br /> MSD 2318014-01 ND 10.010 10.000 ug/L 1.8 100 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2318014-01 ND 11.030 10.000 ug/L 110 80-120 1 <br /> MSD 2318014-01 ND 10.600 10.000 ug/L 4.0 106 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: 1001458265 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 13 of 15 <br />