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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/18/2023 12:27 <br /> 4119 Broad Street Suite 210 Project: Forward LF-Domestic Residential Sampling <br /> San Luis Obispo,CA 93401 Project Number: 2SA2023 Domestic Sampling <br /> Project Manager: Drew Feucht <br /> Volatile Organic Analysis (EPA Method 82606) <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: B174021 <br /> Benzene B174021-BS1 LCS 26.960 25.000 ug/L 108 70-130 1 <br /> Bromodichloromethane B174021-BS1 LCS 28.510 25.000 ug/L 114 70-130 1 <br /> Chlorobenzene B174021-BS1 LCS 24.900 25.000 ug/L 99.6 70-130 1 <br /> Chloroethane B174021-BS1 LCS 27.090 25.000 ug/L 108 70-130 1 <br /> 1,4-Dichlorobenzene B174021-BS1 LCS 25.620 25.000 ug/L 102 70-130 1 <br /> 1,1-Dichloroethane B174021-BS1 LCS 27.050 25.000 ug/L 108 70-130 1 <br /> 1,1-Dichloroethene B174021-BS1 LCS 27.020 25.000 ug/L 108 70-130 1 <br /> Toluene B174021-BS1 LCS 26.400 25.000 ug/L 106 70-130 1 <br /> Trichloroethene B174021-BS1 LCS 25.680 25.000 ug/L 103 70-130 1 <br /> 1,2-Dichloroethane-d4(Surrogate) B174021-BS1 LCS 11.100 10.000 ug/L 111 75-125 1 <br /> Toluene-d8(Surrogate) B174021-BS1 LCS 10.150 10.000 ug/L 102 80-120 1 <br /> 4-Bromofluorobenzene(Surrogate) B174021-BS1 LCS 10.130 10.000 ug/L 101 80-120 1 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BSI LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BSI LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC MS-V15 1 <br /> 1 B174021-BS1 LCS EPA-8260B 09/15/23 09/15/2313:57 ADC 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: 1001456602 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 12 of 15 <br />