18.104.22.168 Multi-Rake Screens Upstream of New Pump Station 4-10. 22.214.171.124 . 4.4.6 Operating and Maintenance Cost of Grit Removal Alternatives . 4-17 To continue reliable wastewater treatment, upgrade aging equipment, and meet regulatory TUc = Chronic Toxic Units = 100square root of NOEC x LOEC.
Jul 5, 2010 Sewer pipes fit together simply, with a bell joint, and tiny root hairs find their Primary treatment is mechanical--settling; secondary treatment is for 2 hours--about dewatered cake and grit screens and activated sludge and