Approved by: Process Manager Approval Date: 16/12/2021 Next Review: 16/122023 OceanaGold Waihi Document ID: WAI-250-PLN-003 Page 18 of 44 Hazardous Substances Management Plan inadvertent release of chemicals. The event of an emergency stop or power failure the hazardous substances storage, dosing, delivery system will shut down into a fail-safe position. All valves will be fail close unless defined by a risk assessed design or change management. Alarm parameters will be set when monitoring instrumentation is installed. The alarm conditions are monitored through the SCADA and on activation will be audible and visual. All alarms must be acknowledged by operations. 7.10 Mixing and Distribution Systems of Hazardous Substances Critical to the safe use of hazardous substances is the confidence that the systems implemented for mixing and distribution be designed, constructed and maintained to an appropriate standard. This equipment must be assessed on the Hazard/Risk matrices and appropriate controls implemented to minimize any potential exposure to the hazardous substances. It must also meet all legal requirements. 7.11 Using Hazardous Substances In addition to the expressed requirements of relevant legislation and standards pertaining to the use of hazardous substances Waihi Operations and its contractors shall also use hazardous substances according to directions given on the SDS that applies to the substance. The SDS shall be made readily available for personnel for reference purposes. Where chemicals identified as hazardous substances are handled in the workplace, employee exposure to these substances must be eliminated or minimised through the hierarchy of controls and the appropriate controls implemented. Hazardous substances used in confined spaces must conform to AS/NZS 2865 - Safe Working in a Confined Space. Any substance found to be incorrectly stored must be reported. 7.11.1 Personal Protective Equipment & Emergency Showers/Eye Wash Stations PPE will be selected and used in accordance with site PPE procedure. Correct PPE signage is to be installed and maintained in all areas where chemicals identified as Hazardous Substances are stored or used. PPE is selected with regard to likely permeability, penetration, resistance to damage and compatibility with work tasks. Eye-wash stations and safety showers are placed in areas where there is a high likelihood of eye contact with chemicals and/or airborne particles. Solutions in eyewash stations are to be kept in date and replaced as expired. Safety showers are regularly tested to ensure they are in working condition and may be alarmed to ensure that other personnel become aware if a person has had to use a shower. 7.11.2 Spill Response Spill response kits shall be made available in all work areas where hydrocarbons and other substances may require containment and clean up. Training is provided to employees who need to conduct spill recovery and clean-up. 7.11.3 Certified Handlers The site has Certified Handlers for hazardous substances stored in quantities exceeding those referred to in the relevant Schedules of the Hazardous Substances (Classes 1 - 5 Controls) Regulations 2001 and/or Hazardous Substances (Classes 6, 8 & 9 Controls) Regulations 2001 Requirements. A register of Certified Handlers and their certificates is maintained in the site training database Intuition. 7.12 Disposing of Hazardous Substances The HSE Manager or delegate shall be notified prior to any disposal of hazardous substances. Disposal requests are to be submitted on the Chemical Disposal Form. Disposal shall be in accordance with the relevant OceanaGold Compliance Standards, and Regional and Local authority requirements. Each department is responsible for disposing of chemicals produced by normal process activities and those, which may arise, from accidental leaks and spillage.
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