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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 />SA2023 Domestic Sampling <br />Drew Feucht <br />Reported:09/19/2023 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: B174129 Used client sample: N <br />MSBenzene 25.660 70 - 130ND25.000 1032317620-01 ug/L 1 <br />MSD 24.610 4.2 20 70 - 130ND25.000 98.42317620-01 ug/L 2 <br />MSBromodichloromethane 26.600 70 - 1302.6800 25.000 95.72317620-01 ug/L 1 <br />MSD 26.360 0.9 20 70 - 1302.6800 25.000 94.72317620-01 ug/L 2 <br />MSChlorobenzene 24.510 70 - 130ND25.000 98.02317620-01 ug/L 1 <br />MSD 23.720 3.3 20 70 - 130ND25.000 94.92317620-01 ug/L 2 <br />MSChloroethane 24.020 70 - 130ND25.000 96.12317620-01 ug/L 1 <br />MSD 22.490 6.6 20 70 - 130ND25.000 90.02317620-01 ug/L 2 <br />MS1,4-Dichlorobenzene 24.940 70 - 130ND25.000 99.82317620-01 ug/L 1 <br />MSD 24.030 3.7 20 70 - 130ND25.000 96.12317620-01 ug/L 2 <br />MS1,1-Dichloroethane 25.570 70 - 130ND25.000 1022317620-01 ug/L 1 <br />MSD 24.620 3.8 20 70 - 130ND25.000 98.52317620-01 ug/L 2 <br />MS1,1-Dichloroethene 27.500 70 - 130ND25.000 1102317620-01 ug/L 1 <br />MSD 26.120 5.1 20 70 - 130ND25.000 1042317620-01 ug/L 2 <br />MSToluene 24.630 70 - 1300.10000 25.000 98.12317620-01 ug/L 1 <br />MSD 24.060 2.3 20 70 - 1300.10000 25.000 95.82317620-01 ug/L 2 <br />MSTrichloroethene 23.100 70 - 130ND25.000 92.42317620-01 ug/L 1 <br />MSD 23.280 0.8 20 70 - 130ND25.000 93.12317620-01 ug/L 2 <br />MS1,2-Dichloroethane-d4 (Surrogate)10.940 75 - 125ND10.000 1092317620-01 ug/L 1 <br />MSD 10.540 3.7 75 - 125ND10.000 1052317620-01 ug/L 2 <br />MSToluene-d8 (Surrogate)10.060 80 - 120ND10.000 1012317620-01 ug/L 1 <br />MSD 9.9300 1.3 80 - 120ND10.000 99.32317620-01 ug/L 2 <br />MS4-Bromofluorobenzene (Surrogate)9.9300 80 - 120ND10.000 99.32317620-01 ug/L 1 <br />MSD 9.9900 0.6 80 - 120ND10.000 99.92317620-01 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 14 of 16Report ID: 1001456910