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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 11:37 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-COELT <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: B227341 Used client sample: N <br /> Benzene MS 2601996-01 ND 28.610 25.000 ug/L 114 70-130 1 <br /> MSD 2601996-01 ND 27.840 25.000 ug/L 2.7 ill 20 70-130 2 <br /> Bromodichloromethane MS 2601996-01 ND 25.180 25.000 ug/L 101 70-130 1 <br /> MSD 2601996-01 ND 25.190 25.000 ug/L 0.0 101 20 70-130 2 <br /> Chlorobenzene MS 2601996-01 ND 24.660 25.000 ug/L 98.6 70-130 1 <br /> MSD 2601996-01 ND 24.570 25.000 ug/L 0.4 98.3 20 70-130 2 <br /> Chloroethane MS 2601996-01 ND 27.380 25.000 ug/L 110 70-130 1 <br /> MSD 2601996-01 ND 26.740 25.000 ug/L 2.4 107 20 70-130 2 <br /> 1,4-Dichlorobenzene MS 2601996-01 ND 24.520 25.000 ug/L 98.1 70-130 1 <br /> MSD 2601996-01 ND 24.380 25.000 ug/L 0.6 97.5 20 70-130 2 <br /> 1,1-Dichloroethane MS 2601996-01 0.92000 29.030 25.000 ug/L 112 70-130 1 <br /> MSD 2601996-01 0.92000 28.760 25.000 ug/L 0.9 ill 20 70-130 2 <br /> 1,1-Dichloroethene MS 2601996-01 0.18000 32.120 25.000 ug/L 128 70-130 1 <br /> MSD 2601996-01 0.18000 31.170 25.000 ug/L 3.0 124 20 70-130 2 <br /> Toluene MS 2601996-01 0.16000 27.230 25.000 ug/L 108 70-130 1 <br /> MSD 2601996-01 0.16000 27.140 25.000 ug/L 0.3 108 20 70-130 2 <br /> Trichloroethene MS 2601996-01 4.2800 30.190 25.000 ug/L 104 70-130 1 <br /> MSD 2601996-01 4.2800 29.550 25.000 ug/L 2.1 101 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2601996-01 ND 11.830 10.000 ug/L 118 75-125 1 <br /> MSD 2601996-01 ND 11.880 10.000 ug/L 0.4 119 75-125 2 <br /> Toluene-d8(Surrogate) MS 2601996-01 ND 10.210 10.000 ug/L 102 80-120 1 <br /> MSD 2601996-01 ND 10.110 10.000 ug/L 1.0 101 80-120 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2601996-01 ND 10.190 10.000 ug/L 102 80-120 1 <br /> MSD 2601996-01 ND 10.180 10.000 ug/L 0.1 102 80-120 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B227341-MS1 MS EPA-8260B 02/17/26 02/17/2616:53 RCC MS-V15 1 <br /> 2 B227341-MSD1 MSD EPA-8260B 02/17/26 02/17/2617:21 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: 1001665326 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 34 of 44 <br />