Table A4.2 Generic environmental risk assessment for municipal irrigation of roofwater Hazard Maximum risk no Critical Preventive Residual risk with — — preventive measure control measures preventive measures (ie uncontrolled) point or control Use or Receiving Environ Effect Impact Impact Like- Level of Like- Level point in expos- environ- -mental lihood riska lihood of risk environ- ure ment or end mental point entry receptor pathway Copper Plants Plants Toxicity Minor Moderate Unlikely Minor Low Irrigat- Almost Source Roof condition ion certain water management Minor Moderate Irrigation Irrigation tools Unlikely Minor Low Almost certain Almost Minor Moderate Irrigation Monitoring Unlikely Minor Low certain Soils Plants Toxicity Minor Moderate Unlikely Minor Low Almost Source Roof condition certain water management Minor Moderate Irrigation Irrigation tools Unlikely Minor Low Almost certain Minor Moderate Irrigation Monitoring Unlikely Minor Low Almost certain
Table A4.2 Generic environmental risk assessment for municipal irrigation of roofwater Hazard Maximum risk — no preventive measure (ie uncontrolled) Critical control point or control point in environ- mental pathway Preventive measures Residual risk — with preventive measures Use or expos- ure entry Receiving environ- ment or receptor Environ -mental end point Effect Like- lihood Impact Level of riska Like- lihood Impact Level of risk Copper Irrigat- ion Plants Plants Toxicity Almost certain Minor Moderate Source water Roof condition management Unlikely Minor Low Almost certain Minor Moderate Irrigation Irrigation tools Unlikely Minor Low Almost certain Minor Moderate Irrigation Monitoring Unlikely Minor Low Soils Plants Toxicity Almost certain Minor Moderate Source water Roof condition management Unlikely Minor Low Almost certain Minor Moderate Irrigation Irrigation tools Unlikely Minor Low Almost certain Minor Moderate Irrigation Monitoring Unlikely Minor Low
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