1) Which step is NOT a real step? a) Sample: Before treatment b) Sample: Sedimentation c) Sample: Filtered d) Sample:Chlorinated e) Sample: After Aeration 2) _________ gets pumped into the water to help ______________ to remove waste. a) Hydrochloric Acid, Air b) Air, Bacteria c) Air, anaerobic bacteria 3) Waste water comes from ____________ and ______________ sources. a) Commercial and Non-domestic b) Residential and Domestic c) Commercial and Natural

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