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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/18/2023 12:27 <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: B174021 Used client sample: N <br /> Benzene MS 2317693-01 ND 24.270 25.000 ug/L 97.1 70-130 1 <br /> MSD 2317693-01 ND 29.220 25.000 ug/L 18.5 117 20 70-130 2 <br /> Bromodichloromethane MS 2317693-01 ND 24.420 25.000 ug/L 97.7 70-130 1 <br /> MSD 2317693-01 ND 27.700 25.000 ug/L 12.6 111 20 70-130 2 <br /> Chlorobenzene MS 2317693-01 ND 23.400 25.000 ug/L 93.6 70-130 1 <br /> MSD 2317693-01 ND 26.920 25.000 ug/L 14.0 108 20 70-130 2 <br /> Chloroethane MS 2317693-01 ND 25.130 25.000 ug/L 101 70-130 1 <br /> MSD 2317693-01 ND 28.090 25.000 ug/L 11.1 112 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2317693-01 ND 23.870 25.000 ug/L 95.5 70-130 1 <br /> MSD 2317693-01 ND 26.580 25.000 ug/L 10.7 106 20 70-130 2 <br /> 1,1-Dichloroethane MS 2317693-01 0.64000 24.990 25.000 ug/L 97.4 70-130 1 <br /> MSD 2317693-01 0.64000 29.000 25.000 ug/L 14.9 113 20 70-130 2 <br /> 1,1-Dichloroethene MS 2317693-01 ND 25.000 25.000 ug/L 100 70-130 1 <br /> MSD 2317693-01 ND 28.880 25.000 ug/L 14.4 116 20 70-130 2 <br /> Toluene MS 2317693-01 ND 23.490 25.000 ug/L 94.0 70-130 1 <br /> MSD 2317693-01 ND 25.930 25.000 ug/L 9.9 104 20 70-130 2 <br /> Trichloroethene MS 2317693-01 ND 23.630 25.000 ug/L 94.5 70-130 1 <br /> MSD 2317693-01 ND 25.620 25.000 ug/L 8.1 102 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2317693-01 ND 11.290 10.000 ug/L 113 75-125 1 <br /> MSD 2317693-01 ND 11.650 10.000 ug/L 3.1 116 75-125 2 <br /> Toluene-d8(Surrogate) MS 2317693-01 ND 10.040 10.000 ug/L 100 80-120 1 <br /> MSD 2317693-01 ND 9.9500 10.000 ug/L 0.9 99.5 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2317693-01 ND 10.280 10.000 ug/L 103 80-120 1 <br /> MSD 2317693-01 ND 10.660 10.000 ug/L 3.6 107 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: 1001456602 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 13 of 15 <br />