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aceAnalytical <br /> ENVIRONMENTAL SCIENCES <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 82606) <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 <br /> QC Batch ID: 8142302 Used client sample: N <br /> Benzene MS 2213755-01 ND 20.890 25.000 ug/L 83.6 70-130 <br /> MSD 2213755-01 ND 21.320 25.000 ug/L 2.0 85.3 20 70-130 <br /> Bromodichloromethane MS 2213755-01 ND 24.170 25.000 ug/L 96.7 70-130 <br /> MSD 2213755-01 ND 25.000 25.000 ug/L 3.4 100 20 70-130 <br /> Chlorobenzene MS 2213755-01 ND 22.830 25.000 ug/L 91.3 70-130 <br /> MSD 2213755-01 ND 23.140 25.000 ug/L 1.3 92.6 20 70-130 <br /> Chloroethane MS 2213755-01 ND 21.080 25.000 ug/L 84.3 70-130 <br /> MSD 2213755-01 ND 21.630 25.000 ug/L 2.6 86.5 20 70-130 <br /> 1,4-Dichlorobenzene MS 2213755-01 ND 24.630 25.000 ug/L 98.5 70-130 <br /> MSD 2213755-01 ND 24.620 25.000 ug/L 0.0 98.5 20 70-130 <br /> 1,1-Dichloroethane MS 2213755-01 ND 21.190 25.000 ug/L 84.8 70-130 <br /> MSD 2213755-01 ND 21.570 25.000 ug/L 1.8 86.3 20 70-130 <br /> 1,1-Dichloroethene MS 2213755-01 ND 21.220 25.000 ug/L 84.9 70-130 <br /> MSD 2213755-01 ND 21.680 25.000 ug/L 2.1 86.7 20 70-130 <br /> Toluene MS 2213755-01 ND 23.750 25.000 ug/L 95.0 70-130 <br /> MSD 2213755-01 ND 24.130 25.000 ug/L 1.6 96.5 20 70-130 <br /> Trichloroethene MS 2213755-01 ND 24.330 25.000 ug/L 97.3 70-130 <br /> MSD 2213755-01 ND 24.240 25.000 ug/L 0.4 97.0 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 2213755-01 ND 8.6700 10.000 ug/L 86.7 75-125 <br /> MSD 2213755-01 ND 8.4500 10.000 ug/L 2.6 84.5 75-125 <br /> Toluene-d8(Surrogate) MS 2213755-01 ND 9.8300 10.000 ug/L 98.3 80-120 <br /> MSD 2213755-01 ND 9.8600 10.000 ug/L 0.3 98.6 80-120 <br /> 4-Bromofluorobenzene(Surrogate) MS 2213755-01 ND 9.8000 10.000 ug/L 98.0 80-120 <br /> MSD 2213755-01 ND 9.6900 10.000 ug/L 1.1 96.9 80-120 <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 parry. 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 70 of 79 <br />