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C <br /> ace Analytical <br /> ENVIRONMENTAL SCIENCES <br /> Arcadis-SLO Reported: 04/13/2026 19:39 <br /> 4119 Broad Street Suite 210 Project: Forward Landfill-Air Samples <br /> San Luis Obispo,CA 93401 Project Number: 30274343.01 1 Q26 Soil Vapor <br /> Project Manager: Dalia Rumani <br /> Volatile Organic Compounds by GC/MS (EPA Method TO-15) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Run# <br /> QC Batch ID: B229888 <br /> Benzene B229888-BS1 LCS 13.258 15.974 ug/m3 Air 83.0 70-130 1 <br /> B229888-BSD1 LCSD 13.354 15.974 ug/m3Air 83.6 0.7 70-130 25 2 <br /> Chloroform B229888-BS1 LCS 21.093 24.413 ug/m3 Air 86.4 70-130 1 <br /> B229888-BSD1 LCSD 21.093 24.413 ug/m3 Air 86.4 0 70-130 25 2 <br /> Ethylbenzene B229888-BS1 LCS 19.236 21.711 ug/m3 Air 88.6 70-130 1 <br /> B229888-BSD1 LCSD 19.236 21.711 ug/m3 Air 88.6 0 70-130 25 2 <br /> Tetrachloroethene B229888-BS1 LCS 29.843 33.913 ug/m3 Air 88.0 70-130 1 <br /> B229888-BSD1 LCSD 29.911 33.913 ug/m3 Air 88.2 0.2 70-130 25 2 <br /> Toluene B229888-BS1 LCS 16.506 18.842 ug/m3 Air 87.6 70-130 1 <br /> B229888-BSD1 LCSD 16.393 18.842 ug/m3 Air 87.0 0.7 70-130 25 2 <br /> Trichloroethene B229888-BS1 LCS 24.504 26.869 ug/m3 Air 91.2 70-130 1 <br /> B229888-BSD1 LCSD 24.343 26.869 ug/m3 Air 90.6 0.7 70-130 25 2 <br /> Trichlorofluoromethane B229888-BS1 LCS 23.822 28.092 ug/m3 Air 84.8 70-130 1 <br /> B229888-BSD1 LCSD 24.046 28.092 ug/m3 Air 85.6 0.9 70-130 25 2 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane B229888-BS1 LCS 32.877 38.318 ug/m3Air 85.8 70-130 1 <br /> B229888-BSD1 LCSD 33.107 38.318 ug/m3 Air 86.4 0.7 70-130 25 2 <br /> p-&m-Xylenes B229888-BSI LCS 38.645 43.421 ug/m3 Air 89.0 70-130 1 <br /> B229888-BSD1 LCSD 38.558 43.421 ug/m3Air 88.8 0.2 70-130 25 2 <br /> o-Xylene B229888-BS1 LCS 19.322 21.711 ug/m3 Air 89.0 70-130 1 <br /> B229888-BSD1 LCSD 19.279 21.711 ug/m3 Air 88.8 0.2 70-130 25 2 <br /> Total Xylenes B229888-BS1 LCS 57.967 65.132 ug/m3 Air 89.0 70-130 1 <br /> B229888-BSD1 LCSD 57.837 65.132 ug/m3 Air 88.8 0.2 70-130 25 2 <br /> 4-Bromofluorobenzene(Surrogate) B229888-BS1 LCS 71.4 71.6 ug/m3 Air 99.7 70-130 1 <br /> B229888-BSD1 LCSD 71.4 71.6 ug/m3 Air 99.7 0 70-130 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B229888-BS1 LCS EPA-TO-15 04/02/26 04/02/2618:33 BEP MS-Al 1 <br /> 2 B229888-BSD1 LCSD EPA-TO-15 04/02/26 04/02/2619:09 BEP MS-Al 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: 1001665764 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 18 of 19 <br />