than one hazard. The lists given in the table are not definitive. Depending on the particular project, other critical control points and preventive measures may be more appropriate. Education and training are important components of implementing and maintaining prevention measures. Table 5.3 Summary of preventive measures and critical control points for managed aquifer recharge Preventive measures Description Critical control point Exclusion barriers — preventing entry Hazard source control Selection or management of water sources No before recharge (eg catchment, recycled water, roof runoff, stormwater) Intake levels Exclusion of floating hazards by maintaining No intake levels below the water surface Continuous monitoring of indicator variable, to risk prevented and Exclusion of water provide feedback to divert water flow or stop monitoring system that does not meet recharge when critical limit is exceeded critical limits Possibly: depends on the hazard, associated Exclusion barriers removing hazards — Attenuation of all human pathogens and Residence time in the selected organic chemicals Yes: the system needs to soil or aquifer provide required residence time; recovery rate is restricted to ensure adequate time between recharge and recovery Travel distance (between recharge and Travel distance in recovery) chosen to provide a minimum No: component of system aquifer residence time under the range of operating design conditions Treatment processes Concentration of specific hazards decreased before recharge or on recovery Possibly: at the point of recharge and/or recovery; depends on the hazard and effect on the specific environmental endpoint
than one hazard. The lists given in the table are not definitive. Depending on the particular project, other critical control points and preventive measures may be more appropriate. Education and training are important components of implementing and maintaining prevention measures. Table 5.3 Summary of preventive measures and critical control points for managed aquifer recharge Preventive measures Description Critical control point Exclusion barriers — preventing entry Hazard source control Selection or management of water sources No before recharge (eg catchment, recycled water, roof runoff, stormwater) Intake levels Exclusion of floating hazards by maintaining No intake levels below the water surface Exclusion of water that does not meet critical limits Continuous monitoring of indicator variable, to provide feedback to divert water flow or stop recharge when critical limit is exceeded Possibly: depends on the hazard, associated risk prevented and monitoring system Exclusion barriers — removing hazards Residence time in the soil or aquifer Travel distance in aquifer Attenuation of all human pathogens and selected organic chemicals Travel distance (between recharge and recovery) chosen to provide a minimum residence time under the range of operating conditions Yes: the system needs to provide required residence time; recovery rate is restricted to ensure adequate time between recharge and recovery No: component of system design Treatment processes Concentration of specific hazards decreased before recharge or on recovery Possibly: at the point of recharge and/or recovery; depends on the hazard and effect on the specific environmental endpoint
water-recycling-guidelines-mar-24.docx