| 
      
        | Description | pH-Adjusted    Bleach | Chlorine    dioxide | Total |  
        |  | Pre-Dissem | Post-Dissem | Post-Decon | Total Samples | Pre-Dissem | Post-Dissem | Post-Decon | Total  Samples | Combined |  
        | Undetected    by instrument | 12 | 6 | 18 | 36 | 18 | 10 | 13 | 41 | 77 |  
        | Detected    by instrument | 8 | 14 | 2 | 24 | 2 | 10 | 7 | 19 | 43 |  
        | Total | 20 | 20 | 20 | 60 | 20 | 20 | 20 | 60 | 120 |  | 
  
    | Note: Dissem: dissemination and Decon: decontamination | 
  
    | Table 2: Summary of the number of samples with descriptions. |