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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 Landfill <br />Austin Unit <br />Drew Feucht <br />Reported:09/19/2023 15:16 <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: B171814 Used client sample: Y - Description: 7833-MW-02, 08/04/2023 10:44 <br />MSBenzene 26.250 70 - 130ND25.000 1052315200-02 ug/L 1 <br />MSD 24.340 7.6 20 70 - 130ND25.000 97.42315200-02 ug/L 2 <br />MSBromodichloromethane 27.480 70 - 130ND25.000 1102315200-02 ug/L 1 <br />MSD 25.090 9.1 20 70 - 130ND25.000 1002315200-02 ug/L 2 <br />MSChlorobenzene 26.820 70 - 130ND25.000 1072315200-02 ug/L 1 <br />MSD 24.450 9.2 20 70 - 130ND25.000 97.82315200-02 ug/L 2 <br />MSChloroethane 25.320 70 - 130ND25.000 1012315200-02 ug/L 1 <br />MSD 23.220 8.7 20 70 - 130ND25.000 92.92315200-02 ug/L 2 <br />MS1,4-Dichlorobenzene 26.420 70 - 130ND25.000 1062315200-02 ug/L 1 <br />MSD 24.410 7.9 20 70 - 130ND25.000 97.62315200-02 ug/L 2 <br />MS1,1-Dichloroethane 25.970 70 - 130ND25.000 1042315200-02 ug/L 1 <br />MSD 24.000 7.9 20 70 - 130ND25.000 96.02315200-02 ug/L 2 <br />MS1,1-Dichloroethene 26.070 70 - 130ND25.000 1042315200-02 ug/L 1 <br />MSD 24.070 8.0 20 70 - 130ND25.000 96.32315200-02 ug/L 2 <br />MSToluene 26.470 70 - 130ND25.000 1062315200-02 ug/L 1 <br />MSD 24.120 9.3 20 70 - 130ND25.000 96.52315200-02 ug/L 2 <br />MSTrichloroethene 56.850 70 - 13030.200 25.000 1072315200-02 ug/L 1 <br />MSD 54.170 4.8 20 70 - 13030.200 25.000 95.92315200-02 ug/L 2 <br />MS1,2-Dichloroethane-d4 (Surrogate)9.7000 75 - 125ND10.000 97.02315200-02 ug/L 1 <br />MSD 9.7100 0.1 75 - 125ND10.000 97.12315200-02 ug/L 2 <br />MSToluene-d8 (Surrogate)10.110 80 - 120ND10.000 1012315200-02 ug/L 1 <br />MSD 10.030 0.8 80 - 120ND10.000 1002315200-02 ug/L 2 <br />MS4-Bromofluorobenzene (Surrogate)9.9300 80 - 120ND10.000 99.32315200-02 ug/L 1 <br />MSD 10.090 1.6 80 - 120ND10.000 1012315200-02 ug/L 2 <br />Run #QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B171814-MS1 MS EPA-8260B TDH MS-V20 108/11/23 08/12/23 02:24 <br /> 2 B171814-MSD1 MSD EPA-8260B TDH MS-V20 108/11/23 08/12/23 02:50 <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 44 of 59Report ID: 1001456984