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t- Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Ground Zero Analysis , Inc. Reported : 01 /27/2020 7 :46 <br /> 1172 Kansas Avenue Project: Bentz - Associated Tractor <br /> Modesto , CA 95351 Project Number: 1174 <br /> Project Manager: Project Manager <br /> Volatile Organic Analysis ( EPA Method 82606 ) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent QC Sample ID MB Result Units PQL MDL Lab Quals <br /> QC Batch ID : 8068853 <br /> Total Xylenes 8068853-13LK1 ND ug/L 1 . 0 0. 36 <br /> Total Trihalomethanes 8068853-13LK1 ND ug/L 2. 0 0 .63 <br /> t-Amyl Methyl ether B068853-BLK1 ND ug/L 0. 50 0 . 25 <br /> t-Butyl alcohol B068853-BLK1 ND ug/L 10 9.4 <br /> Diisopropyl ether B068853-BLK1 ND ug/L 0.50 0.23 <br /> Ethyl t-butyl ether B068853-BLK1 ND ug/L 0. 50 0 . 18 <br /> p- & m-Xylenes B068853-BLK1 ND ug/L 0. 50 0. 28 <br /> o-Xylene B068853-BLK1 ND ug/L 0.50 0. 082 <br /> Total Purgeable Petroleum Hydrocarbons B068853-BLK1 ND ug/L 50 7 . 2 <br /> 1 ,2-Dichloroethane-d4 (Surrogate) 8068853-BLK1 101 % 75 - 125 (LCL - UCL) <br /> Toluene-d8 (Surrogate) B068853-BLK1 102 % 80 - 120 (LCL - UCL) <br /> 4-Bromofluorobenzene (Surrogate) 8068853-BLK1 98A % 80 - 120 (LCL - UCL) <br /> The restills in this repon apply; to the samples analyzed in accotelance with the chain ofcusiody document . Tlii.s analytical report tnttst be reproduced in its entirety. <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 : 1000990981 4100 Atlas Court Bakersfield , CA 93308 (661 ) 327-4911 FAX (661 ) 327-1918 www. bclabs.com Page 28 of 35 <br />