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Arcadis- SLO <br />4119 Broad Street Suite 210 <br />San Luis Obispo, CA 93401 <br />Project: <br />Project Number: <br />Project Manager: <br />Forward LF- Domestic Residential Sampling <br />2SA2023 Domestic Sampling <br />Drew Feucht <br />Reported:09/18/2023 12:28 <br />Quality Control Report - Precision & Accuracy <br />Constituent Sample IDType Result Result Added Units RPD Recovery RPD Recovery Quals <br />Source Spike Percent Percent <br />Control Limits <br />Volatile Organic Analysis (EPA Method 8260B) <br />Source Lab <br />R# <br />QC Batch ID: B174021 Used client sample: N <br />MSBenzene 24.270 70 - 130ND25.000 97.12317693-01 ug/L 1 <br />MSD 29.220 18.5 20 70 - 130ND25.000 1172317693-01 ug/L 2 <br />MSBromodichloromethane 24.420 70 - 130ND25.000 97.72317693-01 ug/L 1 <br />MSD 27.700 12.6 20 70 - 130ND25.000 1112317693-01 ug/L 2 <br />MSChlorobenzene 23.400 70 - 130ND25.000 93.62317693-01 ug/L 1 <br />MSD 26.920 14.0 20 70 - 130ND25.000 1082317693-01 ug/L 2 <br />MSChloroethane 25.130 70 - 130ND25.000 1012317693-01 ug/L 1 <br />MSD 28.090 11.1 20 70 - 130ND25.000 1122317693-01 ug/L 2 <br />MS1,4-Dichlorobenzene 23.870 70 - 130ND25.000 95.52317693-01 ug/L 1 <br />MSD 26.580 10.7 20 70 - 130ND25.000 1062317693-01 ug/L 2 <br />MS1,1-Dichloroethane 24.990 70 - 1300.64000 25.000 97.42317693-01 ug/L 1 <br />MSD 29.000 14.9 20 70 - 1300.64000 25.000 1132317693-01 ug/L 2 <br />MS1,1-Dichloroethene 25.000 70 - 130ND25.000 1002317693-01 ug/L 1 <br />MSD 28.880 14.4 20 70 - 130ND25.000 1162317693-01 ug/L 2 <br />MSToluene 23.490 70 - 130ND25.000 94.02317693-01 ug/L 1 <br />MSD 25.930 9.9 20 70 - 130ND25.000 1042317693-01 ug/L 2 <br />MSTrichloroethene 23.630 70 - 130ND25.000 94.52317693-01 ug/L 1 <br />MSD 25.620 8.1 20 70 - 130ND25.000 1022317693-01 ug/L 2 <br />MS1,2-Dichloroethane-d4 (Surrogate)11.290 75 - 125ND10.000 1132317693-01 ug/L 1 <br />MSD 11.650 3.1 75 - 125ND10.000 1162317693-01 ug/L 2 <br />MSToluene-d8 (Surrogate)10.040 80 - 120ND10.000 1002317693-01 ug/L 1 <br />MSD 9.9500 0.9 80 - 120ND10.000 99.52317693-01 ug/L 2 <br />MS4-Bromofluorobenzene (Surrogate)10.280 80 - 120ND10.000 1032317693-01 ug/L 1 <br />MSD 10.660 3.6 80 - 120ND10.000 1072317693-01 ug/L 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 />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 13 of 15Report ID: 1001456603