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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Ground Zero Analysis , Inc. Reported : 08/21 /2019 17 : 38 <br /> 1172 Kansas Avenue Project: Soil Samples <br /> Modesto , CA 95351 Project Number: 1174 - Associated Tractor <br /> Project Manager: Project Manager <br /> Volatile Organic Analysis ( EPA Method 826013 ) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent QC Sample ID MB Result Units PQL MDL Lab Quals <br /> QC Batch ID : 13053965 <br /> o-Xylene B053965-BLK1 ND mg/kg 0.0050 0.0021 <br /> Total Purgeable Petroleum Hydrocarbons 8053965-BLK1 ND mg/kg 0. 20 0. 13 <br /> 1 ,2-Dichloroethane-d4 (Surrogate) B053965•BLK1 121 % 70 - 121 (LCL - UCL) <br /> Toluene-d8 (Surrogate) 8053965-BLK1 101 % 81 - 117 (LCL - UCL) <br /> 4-Bromofluorobenzene (Surrogate) B053965-BLK1 106 % 74 - 121 (LCL - UCL) <br /> The results in this report apply to the samples analyzed in accordance frith the chain ri(custody document . Thur analytical report nw.vt be reproduced in its eiilitoety. <br /> All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br /> Report ID : 1000928515 4100 Atlas Court Bakersfield , CA 93308 (661 ) 327-4911 FAX (661 ) 327-1918 www. bclabs.com page 17 of 23 <br />