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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 15:42 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-Qtrly Pan Lysimeters <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 <br /> Project Manager: Dalia Rumani <br /> Volatile Organic Analysis (EPA Method 826013) <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: B227612 Used client sample: N <br /> Benzene MS 2602334-08 ND 18.950 25.000 ug/L 75.8 70-130 1 <br /> MSD 2602334-08 ND 18.730 25.000 ug/L 1.2 74.9 20 70-130 2 <br /> Bromodichloromethane MS 2602334-08 ND 26.690 25.000 ug/L 107 70-130 1 <br /> MSD 2602334-08 ND 26.220 25.000 ug/L 1.8 105 20 70-130 2 <br /> Chlorobenzene MS 2602334-08 ND 22.520 25.000 ug/L 90.1 70-130 1 <br /> MSD 2602334-08 ND 21.780 25.000 ug/L 3.3 87.1 20 70-130 2 <br /> Chloroethane MS 2602334-08 ND 21.030 25.000 ug/L 84.1 70-130 1 <br /> MSD 2602334-08 ND 20.670 25.000 ug/L 1.7 82.7 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2602334-08 ND 24.050 25.000 ug/L 96.2 70-130 1 <br /> MSD 2602334-08 ND 22.450 25.000 ug/L 6.9 89.8 20 70-130 2 <br /> 1,1-Dichloroethane MS 2602334-08 ND 22.270 25.000 ug/L 89.1 70-130 1 <br /> MSD 2602334-08 ND 21.940 25.000 ug/L 1.5 87.8 20 70-130 2 <br /> 1,1-Dichloroethene MS 2602334-08 ND 20.090 25.000 ug/L 80.4 70-130 1 <br /> MSD 2602334-08 ND 19.440 25.000 ug/L 3.3 77.8 20 70-130 2 <br /> Toluene MS 2602334-08 ND 21.940 25.000 ug/L 87.8 70-130 1 <br /> MSD 2602334-08 ND 20.950 25.000 ug/L 4.6 83.8 20 70-130 2 <br /> Trichloroethene MS 2602334-08 ND 22.630 25.000 ug/L 90.5 70-130 1 <br /> MSD 2602334-08 ND 21.620 25.000 ug/L 4.6 86.5 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2602334-08 ND 11.610 10.000 ug/L 116 75-125 1 <br /> MSD 2602334-08 ND 11.830 10.000 ug/L 1.9 118 75-125 2 <br /> Toluene-d8(Surrogate) MS 2602334-08 ND 9.9900 10.000 ug/L 99.9 80-120 1 <br /> MSD 2602334-08 ND 10.020 10.000 ug/L 0.3 100 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2602334-08 ND 10.790 10.000 ug/L 108 80-120 1 <br /> MSD 2602334-08 ND 10.550 10.000 ug/L 2.2 106 80-120 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B227612-MS1 MS EPA-8260B 02/20/26 02/21/26 00:51 AGB MS-V21 1 <br /> 2 B227612-MSD1 MSD EPA-8260B 02/20/26 02/21/26 01:17 AGB MS-V21 1 <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: 1001665592 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 19 of 20 <br />