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__wc Analytical <br /> ENL'It:O rIMENTAI SCIENCES <br /> I <br /> Kleinfelder,Inc.-Rancho Cordova Reported: 06/21/2022 14:57 <br /> 2882 Prospect Park,Suite 200 Project: Tracy Costco UST Removal <br /> Rancho Cordova,CA 95670 Project Number: 20223491.00A <br /> Project Manager: Paolo Dizon <br /> Volatile Organic Analysis (EPA Method 826013/5035) <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 <br /> QC Batch ID: B142226 <br /> Benzene B142226-BS1 LCS 0.12259 0.12500 mg/kg 98.1 70-130 <br /> Bromodichloromethane 8142226-BSI LCS 0.12591 0.12500 mg/kg 101 70-130 <br /> Chlorobenzene B142226-BS1 LCS 0.12399 0.12500 mg/kg 99.2 70-130 <br /> Chloroethane B142226-BS1 LCS 0.12432 0.12500 mg/kg 99.5 70-130 <br /> 1,4-Dichlorobenzene B142226-BS1 LCS 0.12772 0.12500 mg/kg 102 70-130 <br /> 1,1-Dichloroethane B142226-BS1 LCS 0.12295 0.12500 mg/kg 98.4 70-130 <br /> 1,1-Dichloroethene B142226-BS1 LCS 0.11151 0.12500 mg/kg 89.2 70-130 <br /> Toluene 8142226-BS1 LCS 0.11733 0.12500 mglkg 93.9 70-130 <br /> Trichloroethene 8142226-BS1 LCS 0.11349 0.12500 mg/kg 90.8 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) 8142226-BS1 LCS 0.047930 0.050000 mg/kg 95.9 70-121 <br /> Toluene-d8(Surrogate) B142226-BS1 LCS 0.050570 0.050000 mg/kg 101 81-117 <br /> 4-Bromofluorobenzene(Surrogate) 8142226-BS1 LCS 0.049920 0.050000 mg/kg 99.8 74-121 <br /> The results in this report apply io the samples analyzed in accordance with the chain of custody document.This analytical report must he 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: 1001318187 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.pacelabs.com Page 74 of 79 <br />