Worksheet 6 – Taking sedimentation tanks and clarifiers off-line
Complete the following details:
Name
Name of Instructor
Instructions
To record your answers for the activities and tasks, you will need to:
1) click in the text boxes
2) type your response
When you close the document you will be prompted to save your changes. Save the document to your computer hard drive
or a removable storage device such as a USB drive.
When finished, print it and keep it with the other forms and records. You may be required to submit this document as part
of your evidence of learning for this task. Please check with your instructor or team leader.
Safety
Taking sedimentation tanks off-line safely is critical to the operation. List eight (8) safety precautions that
need to take place.
1.
2.
3.
4.
5.
6.
7.
8.
Pre-start checks
What needs to be prepared before starting?
Worksheet 6 – Taking sedimentation tanks and clarifiers off-line
Page 1 of 2
Equipment
What needs to be done to ensure equipment is ready (eg safety tags).
Safety interlocks
Safety interlocks are to ensure that equipment doesn’t start and harm the operator or damage the
equipment. What equipment has safety interlocks?
Filters
Often, water is held in filters and discharge lines. What process is in place to clear the filters and lines to
reduce contamination of water in later processes?
Communication
What communication processes are required to ensure all staff are aware of what is occurring?
Automatic process control
The SCADA may be programmed to automatically start when there is a shut down. How do you ensure
any automatic programming doesn’t override manual programming?
Alarms
Manual overrides of equipment including SCADA may result in alarms. How are alarms dealt with?
Services and equipment
Some services and equipment will be needed to assist with the process (e.g. electricity and compressed
air). What services and equipment are needed and how do you make sure they are available?
Worksheet 6 – Taking sedimentation tanks and clarifiers off-line
Page 2 of 2