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ce Analytical <br /> EN YIRCNMENTA!SCIENCES <br /> Ground Zero Analysis, Inc.-Modesto Reported: 07/23/2024 11:27 <br /> 1172 Kansas Avenue Project: Stallworth Auto-EDF <br /> Modesto,CA 95351 Project Number: 602N.California St.Stockton,CA <br /> Project Manager: Greg Stahl <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: B192596 Used client sample: N <br /> Benzene MS 2410588-05 ND 0.12088 0.12500 mg/kg 96.7 70-130 1 <br /> MSD 2410588-05 ND 0.12777 0.12500 mg/kg 5.5 102 20 70-130 2 <br /> Toluene MS 2410588-05 ND 0.10577 0.12500 mg/kg 84.6 70-130 1 <br /> MSD 2410588-05 ND 0.11291 0.12500 mg/kg 6.5 90.3 20 70-130 2 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2410588-05 ND 0.049850 0.050000 mg/kg 99.7 70-121 1 <br /> MSD 2410588-05 ND 0.051790 0.050000 mg/kg 3.8 104 70-121 2 <br /> Toluene-d8(Surrogate) MS 2410588-05 ND 0.051090 0.050000 mg/kg 102 81-117 1 <br /> MSD 2410588-05 ND 0.050960 0.050000 mg/kg 0.3 102 81-117 2 <br /> 4-Bromofluorobenzene(Surrogate) MS 2410588-05 ND 0.051180 0.050000 mg/kg 102 74-121 1 <br /> MSD 2410588-05 ND 0.052170 0.050000 mg/kg 1.9 104 74-121 2 <br /> Run <br /> Run# QC Sample ID QC Type Method Prep Date Date Time Analyst Instrument Dilution <br /> 1 B192596-MS1 MS EPA-8260B 07/10/24 07/11/24 01:30 EAB MS-V18 1 <br /> 1 B192596-MS1 MS EPA-8260B 07/10/24 07/11/24 01:30 EAB MS-V18 1 <br /> 1 B192596-MS1 MS EPA-8260B 07/10/24 07/11/24 01:30 EAB MS-V18 1 <br /> 1 B192596-MS1 MS EPA-8260B 07/10/24 07/11/24 01:30 EAB MS-V18 1 <br /> 1 B192596-MS1 MS EPA-8260B 07/10/24 07/11/24 01:30 EAB MS-V18 1 <br /> 2 B192596-MSD1 MSD EPA-8260B 07/10/24 07/11/24 01:54 EAB MS-V18 1 <br /> 2 B192596-MSD1 MSD EPA-8260B 07/10/24 07/11/24 01:54 EAB MS-V18 1 <br /> 2 B192596-MSD1 MSD EPA-8260B 07/10/24 07/11/24 01:54 EAB MS-V18 1 <br /> 2 B192596-MSD1 MSD EPA-8260B 07/10/24 07/11/24 01:54 EAB MS-V18 1 <br /> 2 B192596-MSD1 MSD EPA-8260B 07/10/24 07/11/24 01:54 EAB MS-V18 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: 1001524132 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 28 of 35 <br />