RFI - 20210153 Maple St SWMP

                                   Figure 4.3 - MUSIC Stormwater Treatment Train




                    4.2.1.1.             Rainwater Tank
The rainwater tank has been modelled as a single 50kL storage volume with a 150mm overflow outlet.
Multiple rainwater tanks may be used to supply the reuse storage volume, however they will be
connected in series and function as a single unit with a single overflow outlet discharging into the
bioretention area.

Rainwater reuse has been calculated in accordance with the MUSIC Modelling Guidelines by Water
By Design (2018). Internal reuse demands are considered based on 8 1-bedroom units, and 3 2-
bedroom units as follows:

          Occupancy –          11 x 1 & 2 Bedroom – 1.2/unit * 11

                               13.2 persons

          Water demand – Toilets (full water saving) – 21L/person/day

                                Laundry (full water saving) -26L/person/day

          Daily demands – 620.4L/day

External irrigation is considered to apply an annual irrigation application of 548mm over an area of
75% of the measured pervious areas (602m²) for an annual demand of

          Irrigation –         0.548m * 0.75 * 602m²

                               247.4kL/year




Project number 20210153
File RECOR Preliminary Stormwater Management Report - 20210153.docx, 2022-03-31                                 Page 18 of 27
Revision 1

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