8 | P a g e Class 1 Location Assessment Willows Road - Surface Magazine, WUG - Waihi North Project . Proposed class 1 site - Compliance summary. • This applies to any person in a public or private place within this zone irrespective of number or density. • In the event of an emergency situation, all site personnel within this zone shall evacuate to 5 kPa zone (minimum). • The 13 kPa controlled zone does not cross into public or private space. • The zone will be managed by way of OGNZL ERP and appropriate evacuation. Controlled zone definition – 9 kPa. r 9.27(2)(b)(i) - public traffic routes of medium density, places where people may occasionally be present in numbers up to 900 persons on average in any 24- hour period, and the interior of any proximate building within the boundary of the place where people not directly handling explosive substances are present are not subject to any of the following: i. a blast overpressure more than 9 kPa. Formula for minimum offset distance in accordance with the above criteria – D = 14.8Q1/3 Proposed class 1 site - Compliance summary. • This applies to public traffic routes of medium density which are not present on the site. • Applies to the interior of any proximate building on site not related to handling of explosives (e.g., office, lunch room etc.). • The zone will be managed by way of an appropriate OGNZL ERP including evacuation protocols. • The controlled zone does not cross into any public or private space. • There is no exposure to any ‘un-related’ occupied building within the controlled zone. Controlled zone definition – 5 kPa r 9.27(2)(c)(i) - public traffic routes of high density, areas of high intensity land use, or any area where a person may be legally present inside the boundary of the place where the hazardous substance location is located are not subject to any of the following: i. a blast overpressure more than 5 kPa. Formula for minimum offset distance in accordance with the above criteria – D = 22.2Q1/3 Proposed class 1 site - Compliance summary. • Applies to any person legally inside boundary of OGNZL owned land, whether employees or members of the public irrespective of number or density. • Managed by way of OGNZL ERP and evacuation (e.g., Muster location must be outside this area). • The controlled zone does not cross into any public high density traffic routes or area of high intensity land use. Controlled zone definition – 2 kPa. r 9.27(2)(d) - vulnerable facilities are not subject to more than a blast overpressure of 2 kPa. Formula for minimum offset distance in accordance with the above criteria – D = 44.4Q1/3 Proposed class 1 site - Compliance summary.
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