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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 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 : B053965 <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 8053965-BS1 LCS 0 . 048120 0. 050000 mg/kg 96. 2 70 - 130 <br /> 1 ,4-Dichlorobenzene 13053965-BS1 LCS 0.046110 0. 050000 mg/kg 92.2 70 - 130 <br /> I , 1 -Dichloroethane B053965-BS1 LCS 0.050090 0. 050000 mg/kg 100 70 - 130 <br /> 1 , 1 -Dichloroethene 6053965-BS1 LCS 0 . 047040 0 . 050000 mg/kg 94. 1 70 - 130 <br /> Toluene 8053965-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) 8053965-BS1 LCS 0.059800 0. 050000 mg/kg 120 70 - 121 <br /> Toluene-d8 (Surrogate) 8053965-BS1 LCS 0. 052340 0 . 050000 mg/kg 105 81 - 117 <br /> 4-Bromofluorobenzene (Surrogate) 8053965-13SI LCS 0. 053350 0. 050000 mg/kg 107 74 - 121 <br /> The results in this report apply to the samples analyzed in acemzlance nuth the chain of custody document . This analytical report must be reproduced in its entirely. <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 /> i <br /> i <br />