132006.268.03 - Amended Court Approval - Attachment 2

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ENVIRONMENTAL

4377-131119-1.0

 

Operating sewage treatment works, other than no-release works, with
a total daily peak design capacity of 21 to 100 EP if treated effluent is

discharged to an infiltration trench or irrigation scheme.

If additional people are using the site and/or water conservation is not being practiced within
the building and additional flow is being generated, enlargement of the STP and irrigation

area may be required. This will be additional cost to the owner.

3.4 TREATMENT SYSTEM
Treatment of wastewater must achieve a minimum of secondary or advanced secondary

effluent quality in accordance with the Queensland Plumbing and Wastewater Code 2011.

Treated Wastewater shall comply with the following quality criteria specified in Table 1.1 of
the Queensland Plumbing and Wastewater Code, which are as follows:

» BODs < 20mg/L

» SS <30mg/L

» Thermotolerant Coliform (org/100mL) < 200

3.5 ADDITIONAL DESIGN CONSIDERATIONS
A number of other design considerations should be made in relation to the following key

elements associated with this project.

Peak Flows and Low Flows
The wastewater treatment plant must be able to cope with periods of sustained high or peak

loads and also periods of very low influent. During these times, appropriate flow balancing

may be necessary in order to buffer against such extreme variable conditions.

Effluent Quality & Concentration
Developments with mixed uses produce (Factory Office Facility) a different type of

wastewater when compared to traditional domestic effluent. Typically, this effluent can be

more concentrated and require specific design considerations.

 

February 2014 Site & Soil Evaluation Report 8
Wastewater Treatment and Effluent Disposal
314 Cooroy Mountain Road, Cooroy Mountain

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