131001 Minor Change Request · 132006.268.03

                                                                                                future-plus
                                                                                        _ _ ' ENVIRONMENTAL
4377-131119-1.0

3.3 HYDRAULIC LOADING
The hydraulic loading for this site was calculated based on the anticipated population
intensities within the factory office facilities and the five (5) bedrooms contained with the
existing dwelling, as provided by the Client (refer Table 2 below).


Table 2; Proposed Population Intensities for the subject site

                                Source                         Proposed Population
                                                         5 persons per day (during standard
                      Factory Office Facility
                                                              daytime operating hours)
                    Five (5) Bedroom Dwelling                        8 persons


The hydraulic loading associated with the proposed development intensity mentioned above
can be calculated using Appendix 4.2D of AS/NZS 1547:2000 based on a typical wastewater
flow allowances generated from rural factories and domestic dwelling. For rural factories this

typically ranges from 30L/P/day for on-site roof tank water supply to 50L/P/day for
reticulated community water or bore water supply as per AS/NZS 1547:2000. The typical
wastewater flow allowances for a domestic dwelling with bore water supply and standard

water reduction fixtures is typically 145L/P/day as per AS/NZS 1547:2000. The estimated
hydraulic loading associated with the development intensity has been calculated in the table
below:



Table 3: Calculated Hydraulic Wastewater Flows From Appendix 4.2D AS/NZS1547:2000

                                                                  Allowance based on Bore
             Source                      Estimated Populations                                  Flows (L/day)
                                                                        Water Supply
      Factory Office Facility                     5                          50*                    250
    Five (5) Bedroom Dwelling                     8                          145                   1,160
                                                                  Total Estimated Daily Flows      1,410




Based on the above, a total maximum hydraulic loading of 1,410 litres (8 Equivalent Persons
- EP) per day may be generated from the combined use of the facilities on-site.



Based on the estimated daily flow of 1,410 litres (8 EP) per day, the site does not trigger an
application for an Environmental Relevant Activity 63(l)(a)(i) identified as;



February 2014                                  Site & Soil Evaluation Report                                    7
                                           Wastewater Treatment and Effluent Disposal
                                           314 Cooroy Mountain Road, Cooroy Mountain