- Communal reuse flushing Ongoing monitoring of coliphages and Clostridia dependant out by DoH at – toilets and designated cold on the outcomes of the validation monitoring. any time. tap washing machines For dual reticulation systems chlorination will be required to provide a measurable residual at the point of use. These will be sampled at the delivery point of the system to ensure a chlorine residual is maintained. Ongoing Monitoring Class Potential End Uses Monitoring Control Measures Type Parameter Compliance Value Frequency End uses with a high level of E. coli2 < 10 MPN or cfu/100 Weeklya Audit may be A minimum horizontal distance of 250m is required from human contact, including: mL required. the edge of the irrigation area to any bore, dam, rainwater tank or other water storage likely to be used to supply Turbidity < 5 NTU (95%ile)5 Continuous online Urban irrigation with Plumbing water for human consumption. (or weekly) unrestricted access and maintenance If using surface irrigation methods, there is to be no application4 and alteration overspray of the property boundary, pedestrian paths and audits required walkways. pH 6.5 8.5 Continuous online – - Fountains and features once every five There is to be no surface runoff or ponding of recycled (or weekly) years, including water. A - Dust suppression with backflow and Compliance with the requirements of AS/NZS 3500.1, unrestricted access including warning and/or prohibition signs, purple colour Disinfection Cl: 0.2-2.0 mg/L Continuous online coding of recycled water meters, external recycled water residual7 (or weekly) - Fire fighting auditing. fittings and pipes, backflow prevention devices and UV: TBA mechanisms to prevent cross connections. TBA - Cooling tower process Random audits For livestock use, helminth treatment may be required and water may be carried testing for helminthic eggs may be required. out by DoH at any time. Ongoing Monitoring Potential End Uses Monitoring Control Measures Type Parameter Compliance Value Notes Frequency E. coli2 < 100 MPN or cfu/100 Monthlya B mL
- Communal reuse – flushing toilets and designated cold tap washing machines out by DoH at any time. Ongoing monitoring of coliphages and Clostridia dependant on the outcomes of the validation monitoring. For dual reticulation systems chlorination will be required to provide a measurable residual at the point of use. These will be sampled at the delivery point of the system to ensure a chlorine residual is maintained. Class Type Potential End Uses Ongoing Monitoring Parameter Compliance Value Monitoring Frequency Control Measures A End uses with a high level of human contact, including: Urban irrigation with unrestricted access and application4 - Fountains and features - Dust suppression with unrestricted access - Fire fighting - Cooling tower process water E. coli2 < 10 MPN or cfu/100 mL Weeklya Audit may be required. Plumbing maintenance and alteration audits required once every five years, including backflow and auditing. Random audits may be carried out by DoH at any time. A minimum horizontal distance of 250m is required from the edge of the irrigation area to any bore, dam, rainwater tank or other water storage likely to be used to supply water for human consumption. If using surface irrigation methods, there is to be no overspray of the property boundary, pedestrian paths and walkways. There is to be no surface runoff or ponding of recycled water. Compliance with the requirements of AS/NZS 3500.1, including warning and/or prohibition signs, purple colour coding of recycled water meters, external recycled water fittings and pipes, backflow prevention devices and mechanisms to prevent cross connections. For livestock use, helminth treatment may be required and testing for helminthic eggs may be required. Turbidity < 5 NTU (95%ile)5 Continuous online (or weekly) pH 6.5 – 8.5 Continuous online (or weekly) Disinfection Cl: 0.2-2.0 mg/L residual7 UV: TBA TBA Continuous online (or weekly) Type Potential End Uses Ongoing Monitoring Parameter Compliance Value Monitoring Frequency Notes Control Measures B E. coli2 < 100 MPN or cfu/100 mL Monthlya
draft-guidelines-wastewater-works-design-approval-for-recycled-water-systems.docx