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WG2596499 QUALITY CONTROL SUMMARY <br /> Volatile Organic Compounds (GC/MS) by Method 8260D L1895603-02 <br /> L1895672-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) Ed <br /> (OS)L1895672-03 09/10/2517:22•(MS)R4272205-4 09/10/2518:29•(MSD)R4272205-5 09/10/2518:52 <br /> Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec.Limits MS Qualifier MSD Qualifier RPD RPD Limits z <br /> Analyte mg/I mg/I mg/1 mg/I % % % % % TC <br /> Benzene 0.0250 ND ND ND 112 78.0 1 17.0-158 J3 35.8 27 <br /> Carbon tetrachloride 0.0250 ND ND ND 102 74.8 1 23.0-159 J3 31.2 28 3 <br /> SS <br /> Chlorobenzene 0.0250 ND ND ND 119 82.0 1 33.0-152 J3 36.7 27 <br /> Chloroform 0.0250 ND ND ND 115 80.0 1 29.0-154 J3 36.1 28 Rn <br /> 1,2-Dichloroethane 0.0250 ND ND ND 109 74.8 1 29.0-151 J3 37.4 27 <br /> M-Dichloroethene 0.0250 ND ND ND 114 85.6 1 11.0-160 28.5 29 <br /> 2-Butanone(MEK) 0.125 ND ND ND 106 71.9 1 10.0-160 J3 37.9 32 5 <br /> Sr <br /> Tetrachloroethene 0.0250 ND ND ND 120 88.4 1 10.0-160 J3 30.7 27 <br /> Trichloroethene 0.0250 ND ND ND 112 78.8 1 10.0-160 J3 35.1 25 <br /> Vinyl chloride 0.0250 ND ND ND 113 85.6 1 10.0-160 J3 27.4 27 <br /> (S)Toluene-d8 103 102 80.0-120 <br /> (S)4-Bromofluorobenzene 100 99.1 77.0-126 <br /> (S)1,2-Dichloroethone-d4 100 107 70.0-130 7 G <br /> $AI <br /> FC <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895603 09/23/25 10:16 34 of 53 <br />