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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/14/2026 11:46 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1Q26 Groundwater Monitoring Wells <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: B227259 Used client sample: Y-Description: AMW-28, 02/05/2026 08:01 <br /> Benzene MS 2601898-01 ND 25.950 25.000 ug/L 104 70-130 1 <br /> MSD 2601898-01 ND 25.910 25.000 ug/L 0.2 104 20 70-130 2 <br /> Bromodichloromethane MS 2601898-01 ND 24.360 25.000 ug/L 97.4 70-130 1 <br /> MSD 2601898-01 ND 24.140 25.000 ug/L 0.9 96.6 20 70-130 2 <br /> Chlorobenzene MS 2601898-01 ND 24.770 25.000 ug/L 99.1 70-130 1 <br /> MSD 2601898-01 ND 24.440 25.000 ug/L 1.3 97.8 20 70-130 2 <br /> Chloroethane MS 2601898-01 ND 24.450 25.000 ug/L 97.8 70-130 1 <br /> MSD 2601898-01 ND 25.230 25.000 ug/L 3.1 101 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2601898-01 ND 23.920 25.000 ug/L 95.7 70-130 1 <br /> MSD 2601898-01 ND 23.790 25.000 ug/L 0.5 95.2 20 70-130 2 <br /> 1,1-Dichloroethane MS 2601898-01 ND 26.240 25.000 ug/L 105 70-130 1 <br /> MSD 2601898-01 ND 26.180 25.000 ug/L 0.2 105 20 70-130 2 <br /> 1,1-Dichloroethene MS 2601898-01 ND 29.710 25.000 ug/L 119 70-130 1 <br /> MSD 2601898-01 ND 29.510 25.000 ug/L 0.7 118 20 70-130 2 <br /> Toluene MS 2601898-01 ND 26.430 25.000 ug/L 106 70-130 1 <br /> MSD 2601898-01 ND 26.180 25.000 ug/L 1.0 105 20 70-130 2 <br /> Trichloroethene MS 2601898-01 ND 25.700 25.000 ug/L 103 70-130 1 <br /> MSD 2601898-01 ND 25.630 25.000 ug/L 0.3 103 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2601898-01 ND 10.340 10.000 ug/L 103 75-125 1 <br /> MSD 2601898-01 ND 10.810 10.000 ug/L 4.4 108 75-125 2 <br /> Toluene-d8(Surrogate) MS 2601898-01 ND 10.100 10.000 ug/L 101 80-120 1 <br /> MSD 2601898-01 ND 10.180 10.000 ug/L 0.8 102 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2601898-01 ND 10.110 10.000 ug/L 101 80-120 1 <br /> MSD 2601898-01 ND 10.030 10.000 ug/L 0.8 100 80-120 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B227259-MS1 MS EPA-8260B 02/16/26 02/16/2616:24 RCC MS-V15 1 <br /> 2 B227259-MSD1 MSD EPA-8260B 02/16/26 02/16/2616:52 RCC MS-V15 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 1001665835 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 106 of 116 <br />