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Laboratories Inc. <br /> 7M 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 82606 ) <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 : 8053965 <br /> Benzene B053965-BSI LCS 0. 042990 0 . 050000 mg/kg 86. 0 70 - 130 <br /> Bromodichloromethane B053965-BS1 LCS 0 . 054100 0 . 050000 mg/kg 108 70 - 130 <br /> Chlorobenzene B053965-BS1 LCS 0 . 046950 0. 050000 mg/kg 93. 9 70 - 130 <br /> Chloroethane B053965-BS1 LCS 0. 048120 0.050000 mg/kg 96.2 70 - 130 <br /> 1 ,4-Dichlorobenzene B053965-BSI LCS 0. 046110 0.050000 mg/kg 92.2 70 - 130 <br /> 1 , 1 -Dichloroethane 8053965-13SI LCS 0. 050090 0. 050000 mg/kg 100 70 - 130 <br /> 1 , 1 -Dichloroethene B053965-BS1 LCS 0. 047040 0 . 050000 mg/kg 94. 1 70 - 130 <br /> Toluene B053965-BS1 LCS 0 . 047940 0. 050000 mg/kg 95. 9 70 - 130 <br /> Trichloroethene B053965-BS1 LCS 0. 048350 0.050000 mg/kg 96.7 70 - 130 <br /> 1 ,2-Dichloroethane-d4 (Surrogate) B053965-13S1 LCS 0 . 059800 0.050000 mg/kg 120 70 - 121 <br /> Toluene-d8 (Surrogate) B053965-BS1 LCS 0.052340 0. 050000 mg/kg 105 81 - 117 <br /> 4-Bromofluorobenzene (Surrogate) 8053965-BS1 LCS 0. 053350 0. 050000 mg/kg 107 74 - 121 <br /> The results in this report apply to the samples analyzed in accordance wish the chain of mrstody document . This analytical report mast 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 : 1000928515 4100 Atlas Court Bakersfield , CA 93308 (661 ) 327-4911 FAX (661 ) 327-1918 www, bclabs.com Page 18 of 23 <br />