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Describe storm sewers
Convey storm water runoff and other drainage
Describe combined sewers
Conveys sanitary and stormwater
Preliminary treatment takes place at what part of the treatment plant?
The Headworks
Materials are removed by the use of __ __ __ (the screening step)
Bar racks, trash racks, commutators
Head works can include __ , and/or _ (different duties)
Flow measurements, flow equalization, pumping, odor control
A manual screen with large opening is often called a _____
Trash Rack
Grit basins are channels or small tanks that slow the velocity down to what?
0.3 m/s (1 ft/s)