Event Controls (Mitigation/ Management Measures) Residual risk assessment Controls to reduce likelihood Controls to reduce severity of consequence Likelihood Consequence Risk Rupture or leak of the hydrated lime, hydrogen peroxide, caustic or hydrochloric acid tanks onsite and release to the environment Design, testing, inspection, certification of storage systems in accordance with standards set out in the HSW-HS and preventative maintenance will minimise the risk of leakage of hazardous substances. Secondary and tertiary containment provided for the Processing Plant and WTP areas to contain any spills on site. Emergency response plans prepared for the event of accidental release. Unlikely – multiple failures of structural controls required to result in discharge to the environment. Minor – any release contained in secondary containment or waste systems on site Low Fire/explosion due to failure of the oxygen tank system. Design, testing, inspection, certification in accordance with standards set out in the Health and Safety in Employment (Pressure Equipment, Cranes, and Passenger Ropeways) Regulations 1999 and preventative maintenance will minimise the risk of leakage of oxygen. Exclusion of ignition sources, incompatible materials and combustible materials from the oxygen tank area. Separation distances to other buildings, hazardous substances or sensitive locations. Fire protection systems will be available. Emergency response plans prepared for the event of accidental release. Unlikely – oxygen system has restricted access and cannot accelerate fire without both an ignition source and combustible fuel. Minor – area is well separated from any sensitive off site receptors. Low
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