Following completion of Chapter 5, students should be able to:

1. Explain how sand filters work.
2. Safely operate and maintain a sand filter.
3. Safely operate and maintain a recirculating gravel filter.
4. Describe subsurface infiltration systems and how they work.
5. Monitor and control a subsurface leaching system.
6. Monitor and control seepage beds and pits.
7. Operate and maintain absorption mounds.
8. Operate and maintain evapotranspiration systems.
9. Safely perform your duties.

The purpose of this chapter is to teach operators how to safely operate and maintain intermittent and recirculating sand filters and recirculating gravel filters. It also explains how to operate and maintain subsurface wastewater infiltration systems, seepage beds and pits, absorption mounds and evapotranspiration systems.

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