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7MLaboratories 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 826013 ) <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 : B068853 Used client sample : N <br /> 1 , 1 -Dichloroethene MS 1941859-88 ND 25 .780 25 . 000 ug/L 103 70 - 130 <br /> MSD 1941859-88 ND 24.670 25.000 ug/L 4.4 98.7 20 70 - 130 <br /> Toluene MS 1941859-88 ND 26 . 480 25 .000 ug/L 106 70 - 130 <br /> MSD 1941859-88 ND 25 . 340 25 .000 ug/L 4 .4 101 20 70 - 130 <br /> Trichloroethene MS 1941859-88 ND 26 . 140 25.000 ug/L 105 70 - 130 <br /> MSD 1941859-88 ND 25. 160 25.000 ug/L 3. 8 101 20 70 - 130 <br /> 1 , 2-DichloroethaneAel (Surrogate) MS 1941859-88 ND 10. 200 10 .000 ug/L 102 75 - 125 <br /> MSD 1941859-88 ND 10 . 910 10 . 000 ug/L 6 .7 109 75 - 125 <br /> TolueneA8 (Surrogate) MS 1941859-88 ND 10.440 10.000 ug/L 104 80 - 120 <br /> MSD 1941859-88 ND 10. 150 10 .000 ug/L 2. 8 102 80 - 120 <br /> 4-Bromofluorobenzene (Surrogate) MS 1941859-88 ND 10. 100 10 . 000 ug/L 101 80 - 120 <br /> MSD 1941859-88 ND 10 . 110 1 0 . 0 00 ug/L 0 . 1 101 80 - 120 <br /> The resells in !Iris report apply to 1he samples analyzed in acconlance with the chain of custody document . This analylical 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 : 1000990981 4100 Atlas Court Bakersfield , CA 93308 (661 ) 327-4911 FAX (661 ) 327- 1918 www, bclabs.com Page 31 of 35 <br />