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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Arcadis-SLO Reported: 09/26/2023 13:28 <br /> 4119 Broad Street Suite 210 Project: Forward LF-Domestic Residential Sampling <br /> San Luis Obispo,CA 93401 Project Number: [none] <br /> Project Manager: Zina Kamal <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: B174443 <br /> Benzene B174443-BSI LCS 18.530 25.000 ug/L 74.1 70-130 1 <br /> Bromodichloromethane 8174443-BS1 LCS 23.990 25.000 ug/L 96.0 70-130 1 <br /> Chlorobenzene 8174443-BS1 LCS 24.180 25.000 ug/L 96.7 70-130 1 <br /> Chloroethane 8174443-BS1 LCS 24.120 25.000 ug/L 96.5 70-130 1 <br /> 1,4-Dichlorobenzene B174443-BS1 LCS 27.330 25.000 ug/L 109 70-130 1 <br /> 1,1-Dichloroethane B174443-BS1 LCS 17.920 25.000 ug/L 71.7 70-130 1 <br /> 1,1-Dichloroethene B174443-BS1 LCS 19.670 25.000 ug/L 78.7 70-130 1 <br /> Toluene B174443-BS1 LCS 22.000 25.000 ug/L 88.0 70-130 1 <br /> Trichloroethene B174443-BS1 LCS 21.120 25.000 ug/L 84.5 70-130 1 <br /> 1,2-Dichloroethane-d4(Surrogate) B174443-BS1 LCS 9.2100 10.000 ug/L 92.1 75-125 1 <br /> Toluene-d8(Surrogate) B174443-BS1 LCS 10.040 10.000 ug/L 100 80-120 1 <br /> 4-Bromofluorobenzene(Surrogate) B174443-BS1 LCS 10.290 10.000 ug/L 103 80-120 1 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 8174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 8174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 8174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BSI LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 B174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC MS-V21 1 <br /> 1 8174443-BS1 LCS EPA-8260B 09/21/23 09/22/2310:43 RCC 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: 1001458265 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 12 of 15 <br />