Table 2.1 (continued) and criteria Indicative Maintenance action frequency (where required) Drain, clean out and check the tank deterioration Every condition of the tank walls and roof to 3 years Repair tank defects ensure no holes have arisen due to Check sediment levels in the tank Organise a suitable contractor to remove accumulated sediment if levels are threatening to block tank outlets or are affecting water quality Identify the reason for any problems Undertake a systematic review of operational control of risks to the identified and take actions to prevent system failures occurring in future 5 years After 10 years Monitor soil copper and zinc levels Stop roofwater irrigation if levels and then exceed criteria every 5 years After Clean or replace any clogged 20 years Monitor the effectiveness of any equipment and then irrigation equipment over 20 years old every for clogging due to algal growth Note: These recommendations do not supersede any relevant state or territory requirements. Maintenance should also include inspection and follow up on any complaints or concerns raised that could indicate problems with the system. Monitoring should be designed to identify any problems with the operations (eg system’s potentially system-related health problems where a reasonably static population is exposed, such as childcare facilities, and effects on plants watered by roofwater). However, it is not necessary to undertake routine monitoring of the quality of roofwater used for garden watering, toilet flushing and laundry use. 2.5 Nonresidential roofwater reuse checklist This checklist summarises the key health and environmental risk management actions for a nonresidential roofwater scheme where there is no intentional drinking or contact with roofwater. D Planning and other regulatory requirements are met. D The operating organisation is committed to the safe collection and use of roofwater, including ensuring appropriate operation and maintenance.
Table 2.1 (continued) Indicative frequency and criteria Maintenance action (where required) Every 3 years Drain, clean out and check the condition of the tank walls and roof to ensure no holes have arisen due to tank deterioration Repair tank defects Check sediment levels in the tank Organise a suitable contractor to remove accumulated sediment if levels are threatening to block tank outlets or are affecting water quality Undertake a systematic review of operational control of risks to the system Identify the reason for any problems identified and take actions to prevent failures occurring in future After 10 years and then every 5 years Monitor soil copper and zinc levels Stop roofwater irrigation if levels exceed criteria After 20 years and then every 5 years Monitor the effectiveness of any irrigation equipment over 20 years old for clogging due to algal growth Clean or replace any clogged equipment Note: These recommendations do not supersede any relevant state or territory requirements. Maintenance should also include inspection and follow up on any complaints or concerns raised that could indicate problems with the system. Monitoring should be designed to identify any problems with the system’s operations (eg potentially system-related health problems where a reasonably static population is exposed, such as childcare facilities, and effects on plants watered by roofwater). However, it is not necessary to undertake routine monitoring of the quality of roofwater used for garden watering, toilet flushing and laundry use. 2.5 Nonresidential roofwater reuse checklist This checklist summarises the key health and environmental risk management actions for a nonresidential roofwater scheme where there is no intentional drinking or contact with roofwater. D Planning and other regulatory requirements are met. D The operating organisation is committed to the safe collection and use of roofwater, including ensuring appropriate operation and maintenance.
water-recycling-guidelines-stormwater-23.docx