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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 - 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: B174129 Used client sample: N <br /> Benzene MS 2317620-01 ND 25.660 25.000 ug/L 103 70-130 1 <br /> MSD 2317620-01 ND 24.610 25.000 ug/L 4.2 98.4 20 70-130 2 <br /> Bromodichloromethane MS 2317620-01 2.6800 26.600 25.000 ug/L 95.7 70-130 1 <br /> MSD 2317620-01 2.6800 26.360 25.000 ug/L 0.9 94.7 20 70-130 2 <br /> Chlorobenzene MS 2317620-01 ND 24.510 25.000 ug/L 98.0 70-130 1 <br /> MSD 2317620-01 ND 23.720 25.000 ug/L 3.3 94.9 20 70-130 2 <br /> Chloroethane MS 2317620-01 ND 24.020 25.000 ug/L 96.1 70-130 1 <br /> MSD 2317620-01 ND 22.490 25.000 ug/L 6.6 90.0 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2317620-01 ND 24.940 25.000 ug/L 99.8 70-130 1 <br /> MSD 2317620-01 ND 24.030 25.000 ug/L 3.7 96.1 20 70-130 2 <br /> 1,1-Dichloroethane MS 2317620-01 ND 25.570 25.000 ug/L 102 70-130 1 <br /> MSD 2317620-01 ND 24.620 25.000 ug/L 3.8 98.5 20 70-130 2 <br /> 1,1-Dichloroethene MS 2317620-01 ND 27.500 25.000 ug/L 110 70-130 1 <br /> MSD 2317620-01 ND 26.120 25.000 ug/L 5.1 104 20 70-130 2 <br /> Toluene MS 2317620-01 0.10000 24.630 25.000 ug/L 98.1 70-130 1 <br /> MSD 2317620-01 0.10000 24.060 25.000 ug/L 2.3 95.8 20 70-130 2 <br /> Trichloroethene MS 2317620-01 ND 23.100 25.000 ug/L 92.4 70-130 1 <br /> MSD 2317620-01 ND 23.280 25.000 ug/L 0.8 93.1 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2317620-01 ND 10.940 10.000 ug/L 109 75-125 1 <br /> MSD 2317620-01 ND 10.540 10.000 ug/L 3.7 105 75-125 2 <br /> Toluene-d8(Surrogate) MS 2317620-01 ND 10.060 10.000 ug/L 101 80-120 1 <br /> MSD 2317620-01 ND 9.9300 10.000 ug/L 1.3 99.3 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2317620-01 ND 9.9300 10.000 ug/L 99.3 80-120 1 <br /> MSD 2317620-01 ND 9.9900 10.000 ug/L 0.6 99.9 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 14 of 16 <br />