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4 Written questions

3 Multiple choice questions

  1. an underground tank containing bacteria that treat wastewater as it passes through
  2. is a measurement of how acidic or basic it is on a scale of 0 - 14.
  3. a specific source of pollution that can be identified

3 True/False questions

  1. Sludgethat wastewater and the different kinds of wastes in it


  2. Filtrationis the process of passing water through a series or screens that allow the water through but not larger solid particles


  3. Sewageduring primary treatment deposits of fine solids settle out from the wastewater