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WG2600506 QUALITY CONTROL SUMMARY <br /> Polychlorinated Biphenyls (GC) by Method 8082 A L1895744-01 <br /> Method Blank (MB) Ed <br /> (MB)R4273999-1 09/15/25 22:39 <br /> MB Result MB Qualifier MB MDL MB RDL PC <br /> Analyte mg/kg mg/kg mg/kg <br /> PCB 1016 U 0.0102 0.0340 <br /> PCB 1221 U 0.0107 0.0340 FS <br /> PCB 1232 U 0.0182 0.0340 <br /> PCB 1242 U 0.0101 0.0340 Rn <br /> PCB 1248 U 0.0124 0.0170 <br /> PCB 1254 U 0.0104 0.0170 <br /> PCB 1260 U 0.0110 0.0170 FSr <br /> (S)Decachlorobiphenyl 56.8 10.0-135 <br /> (S)Tetrochloro-m-xylene 64.0 10.0-139 <br /> Laboratory Control Sample (LCS) �GI <br /> (LCS)R4273999-5 09/15/25 22:59 <br /> Spike Amount LCS Result LCS Rec. Rec.Limits LCS Qualifier gAl <br /> Analyte mg/kg mg/kg % % <br /> PCB 1016 0.167 0.119 71.3 36.0-141 Fc <br /> PCB 1260 0.167 0.126 75.4 37.0-145 <br /> (S)Decachlorobiphenyl 73.4 10.0-135 <br /> (S)Tetrachloro-m-xylene 79.7 10.0-139 <br /> L1896774-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) <br /> (OS)L1896774-01 09/16/25 01:14•(MS)R4273999-6 09/16/25 01:46•(MSD)R4273999-7 09/16/25 01:56 <br /> Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec.Limits MS Qualifier MSD Qualifier RPD RPD Limits <br /> Analyte mg/kg mg/kg mg/kg mg/kg % % % % % <br /> PCB 1016 0.164 ND 0.114 0.109 69.5 66.5 1 10.0-160 4.48 37 <br /> PCB 1260 0.164 ND 0.105 0.0994 64.0 60.6 1 10.0-160 5.48 38 <br /> (S)Decachlorobiphenyl 65.9 63.1 10.0-135 <br /> (S)Tetrochloro-m-xylene 79.1 77.6 10.0-139 <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895744 09/23/25 10:17 41 of 53 <br />