Hazard zone of the PPRT of Calaire Chemistry SA

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP. The hazard map is the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The evaluation method is specific to each hazard type. It leads to the delimitation of a set of areas on the study perimeter constituting a zoning graduated according to the level of the hazard. The assignment of a hazard level at a given point in the territory takes into account the probability of occurrence of the dangerous phenomenon and its degree of intensity.For PPRTs the hazard levels are determined by effect effect on maps by type of effect and overall on an aggregated level on a synthesis map.All hazard areas represented on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered to be subject to hazard (cases of breakage or inadequacy of the structure).The hazard zones may be classified as data compiled in so far as they result from a synthesis using several sources of calculated, modelled or observed hazard data. These source data are not covered by this class of objects but by another standard dealing with the knowledge of hazards.Some areas of the study perimeter are considered “zero or insignificant hazard zones”. These are the areas where the hazard has been studied and is nil. These areas are not included in the object class and do not have to be represented as hazard zones.

指暴露于用于RPP风险分析的灾害地图（hazard map）所标注的一种或多种灾害的区域。该灾害地图为灾害研究的产出成果，其研究目标为评估研究区域内任意点位的各类灾害强度。评估方法因灾害类型各不相同，最终可在研究范围内划定一系列区域，形成按灾害等级分级的分区体系。针对研究区域内任一给定点位的灾害等级赋值时，需综合考量该危险现象的发生概率及其强度等级。针对PPRTs，灾害等级将按灾害影响类型在对应地图上分别确定，并在综合地图（synthesis map）上以聚合等级整体划定。灾害地图上标注的全部灾害区域均需纳入该对象类别。受防护结构（protective structures）保护的区域也需以特定方式标注（可视具体情况而定），因这类区域始终存在受灾害影响的风险，例如防护结构破损或防护效能不足的情形。灾害区域可归类为已汇编数据，前提是此类数据源自对多源计算、建模或观测所得灾害数据的综合分析。此类源数据不属于该对象类别的覆盖范畴，而应由另一项针对灾害认知的标准规范进行管理。研究范围内的部分区域被视为“零灾害或可忽略灾害区域”，即已完成灾害研究且灾害等级为零的区域。这类区域不属于该对象类别的覆盖范围，无需作为灾害区域进行标注。