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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 />Forward Landfill-Forward GTWS <br />Drew Feucht <br />Reported:07/25/2023 12:23 <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: B170442 Used client sample: N <br />MS1,1-Dichloroethene 28.460 70 - 130ND25.000 1142314150-01 ug/L 3 <br />MSD 24.670 14.3 20 70 - 130ND25.000 98.72314150-01 ug/L 4 <br />MSToluene 23.400 70 - 130ND25.000 93.62314150-01 ug/L 3 <br />MSD 19.970 15.8 20 70 - 130ND25.000 79.92314150-01 ug/L 4 <br />MSTrichloroethene 24.180 70 - 130ND25.000 96.72314150-01 ug/L 3 <br />MSD 20.520 16.4 20 70 - 130ND25.000 82.12314150-01 ug/L 4 <br />MS1,2-Dichloroethane-d4 (Surrogate)11.500 75 - 125ND10.000 1152314150-01 ug/L 3 <br />MSD 11.620 1.0 75 - 125ND10.000 1162314150-01 ug/L 4 <br />MSToluene-d8 (Surrogate)10.410 80 - 120ND10.000 1042314150-01 ug/L 3 <br />MSD 10.370 0.4 80 - 120ND10.000 1042314150-01 ug/L 4 <br />MS4-Bromofluorobenzene (Surrogate)10.920 80 - 120ND10.000 1092314150-01 ug/L 3 <br />MSD 10.640 2.6 80 - 120ND10.000 1062314150-01 ug/L 4 <br />Run #QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B170280-MS1 MS EPA-8260B ADC MS-V15 107/20/23 07/20/23 11:12 <br /> 2 B170280-MSD1 MSD EPA-8260B ADC MS-V15 107/20/23 07/20/23 11:36 <br /> 3 B170442-MS1 MS EPA-8260B ADC MS-V15 107/24/23 07/24/23 12:04 <br /> 4 B170442-MSD1 MSD EPA-8260B ADC MS-V15 107/24/23 07/24/23 12:29 <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 22 of 23Report ID: 1001442650