This project was designed by FMG Engineering. The approximate site area of the development is 66,000 sqm which is being treated by a precast StormFilter Vault system and some small rain gardens in the car park. The site is predominantly made up of roof and car park areas hence Enviropods have been used as the primary form of pre-treatment to capture key pollutants such as suspended solids with a 343kL rain water tank pre-treating the majority of roof. The precast vault designed by us incorporated an internal bypass arrangement that eliminated upstream bypass pits simplifying the drainage arrangement for the builder. Furthermore, the vault was designed to cater for four metres of fill over the top of the system.
It is proposed to connect all large roof areas of the proposed re-use tanks. The water shall be used for irrigation and toilet flushing as a minimum. These tanks will then surcharge into proposed Stormwater infrastructure and be treated by the StormFilter prior to discharge from site. All pavements shall be collected by a series of field inlets fitted with EnviroPods as pre-treatment prior to being treated by the StormFilter and discharging to the underground infrastructure.