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February 20, 2019 Lab ID : STK1931316 Aramark Uniform- Customer : 3-17510 Inorganic- Metals QC 02/05/2019:201279 All preparation quality controls are within established criteria,except: The following note applies to Barium,Chromium,Lead, Silver: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 3010 The following note applies to Silver: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. The following note applies to Barium,Lead: 430 Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this analyte.Data was accepted based on the LCS recovery. Organic QC 02/12/2019:201530 All preparation quality controls are within established criteria,except: The following note applies to 2-Fluorobiphenyl: 436 Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. 3520 The following note applies to 2-Fluorobiphenyl,2-Fluorophenol,2,4,6-Tribromophenol,Nitrobenzene-d5, Phenol-d6: 410 Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. The following note applies to 2-Fluorobiphenyl,2,4-Dinitrotoluene,Pentachlorophenol,Nitrobenzene-d5: 320 LCS not within Acceptance Range(AR).Data was accepted based on the BS/BSD recovery. 02/18/2019:201789 All preparation quality controls are within established criteria,except: The following note applies to Toluene-d8: 310 LCS above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 5030B The following note applies to Toluene-d8: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. The following note applies to 1,1-Dichloroethylene,Chlorobenzene: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 02/18/2019:202481 All analysis quality controls are within established criteria,except: 8260B The following note applies to 2-Butanone(MEK): 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 8270C 02/15/2019:202152 All analysis quality controls are within established criteria. Page 2 of 11