Changes

*'''Settling Tanks:''' Allow any sediment that is suspended in the rainwater drained from the roof to settle out before rainwater enters the cistern. Three (3) settling tanks are present.

*'''Settling Tanks:''' Allow any sediment that is suspended in the rainwater drained from the roof to settle out before rainwater enters the cistern. Three (3) settling tanks are present.

*'''Rainwater Cistern:''' Has capacity for up to 5,000 L of rainwater. This cistern holds water that will then be pumped through the CSA-compliant treatment system. After treatment, rainwater is used in Building A’s toilets.

*'''Rainwater Cistern:''' Has capacity for up to 5,000 L of rainwater. This cistern holds water that will then be pumped through the CSA-compliant treatment system. After treatment, rainwater is used in Building A’s toilets.

*'''Micron Filter:''' Removes any fine debris from the rainwater that was not settled out in the settling tanks. This filtration is important for removing impurities, eliminating odours, and ensuring debris does not impede the efficacy of the UV treatment unit by blocking light. A filter pore size of 5 μm is used.

*'''Micron Filter:''' Removes any fine debris from the rainwater that was not settled out in the settling tanks. This filtration is important for removing impurities, eliminating odours, and ensuring debris does not impede the efficacy of the UV treatment unit by blocking light. Filter pore sizes of 100 μm and 5 μm are used.

*'''UV Lamp:''' Disinfects rainwater by sterilizing bacteria and viruses with UV radiation. Note that UV disinfection does not have any residual effect that can be harmful to humans or aquatic life. A dosage of 40 mJ/cm2 is administered.

*'''UV Lamp:''' Disinfects rainwater by sterilizing bacteria and viruses with UV radiation. Note that UV disinfection does not have any residual effect that can be harmful to humans or aquatic life. A dosage of 40 mJ/cm2 is administered.

*'''Chlorine Pump:''' Provides a chlorine residual of 0.5 mg/L that can ensure that rainwater is protected from recontamination in the distribution line or when supplied to the toilets. Chlorination is not required for CSA compliance, but it was added for good measure.

*'''Chlorine Pump:''' Provides a chlorine residual of 0.5 mg/L that can ensure that rainwater is protected from recontamination in the distribution line or when supplied to the toilets. Chlorination is not required for CSA compliance, but it was added for good measure.