Occupation: Water and Wastewater Treatment Plant and System Operators
Task: Add chemicals, such as ammonia, chlorine, or lime, to disinfect and deodorize water and other liquids.

Scale: Frequency of Task (Categories 1-7)
Category: 1
Value: 5.39 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 2
Value: 6.29 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 3
Value: 12.95 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 4
Value: 2.86 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 5
Value: 35.72 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 6
Value: 10.91 (N=82)
Source: Incumbent, 06/2009

Scale: Frequency of Task (Categories 1-7)
Category: 7
Value: 25.88 (N=82)
Source: Incumbent, 06/2009

Scale: Importance
Value: 4.45 (N=83)
Source: Incumbent, 06/2009

Scale: Relevance of Task
Value: 94.65 (N=88)
Source: Incumbent, 06/2009