1209 SWQMP Report_3 2013

                                                                                 Callaghan & Toth

4.       WATER CYCLE MANAGEMENT PLAN
This development has been designed in accordance with Deemed to Comply Solutions –
Stormwater Quality Management (South East Queensland) Version 1.0 – May 2010.

To this end, 100% of the new roof area of 1.39 hectares will be connected to thirty two (32)
rainwater tanks. Each tank will have a capacity of 50,000 litres.

The rainwater tanks will supply water to feed the poultry and will have a top up facility from
one of the five on-site dams.

It is estimated by Inghams Queensland that in summer each shed will require 13,000 litres
for the cool shed pads cells and a average 9,819 litres for drinking water (AVIAGEN Table 7)
i.e., 22,819 litres total daily use for 30,000 Poultry’s (average shed size) therefore allow a
average 22,819 litres per shed per day. It is noted that sheds are not stocked all of the year
as there is a 2.5 week cleaning period after 7 weeks growing. As such the sheds are
stocked 71% of the year.

Therefore Total water requirements are:

     •   22,819 litres/shed/day x 8 sheds x 0.71=Total daily use of 130,394 litres.
     •   Total monthly use of 3,955,293 litres.

Rainwater tank and dam supply capacity has been calculated in accordance with Appendix
B of EN Health Guidelines on the use of rainwater tanks.

The attached calculations in Appendix 6 show that the thirty two 50,000 litre tanks can
provide a 12.2% water supply security for the birds.

The attached calculations in Appendix 7 shows that the utilisation of just two of the seven
dams on site (each with a volume approximately 5000m3) can on its own supply 99% of the
required water supply for the Poultry’s.

 A minimum of 24 hours storage is required to ensure there is sufficient supply for the
Poultry’s in the case of electrical failure. The thirty two 50,000 litre tanks (1,600,000 litres)
provide 12.2% of the security of supply for the bird’s water requirements and provide 12
days storage at average usage.

The tanks will have a top up facility from two of the seven dams to ensure security of supply.

5        FLOODING ASSESSMENT REPORT
5.1      Existing Conditions

This site is not subject to ponding of floodwaters from the adjacent waterways and the Q100
year ARI flood levels. The buildings and carparks are above the Q100 year ARI flood levels.

5.2      Proposed Drainage System

The road surface level is proposed to be drained to either an underground drainage system
or to the verge via sheet flow. The road surface waters will discharge to the existing Avocado

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1209 Animal Husbandry – Top Forestry Rd, Ridgewood                             SWQMP_REV_3
September 2013