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Case Study: Environmental Analysis

GIS Map


Step 6a: Identify secondary hazard risk consideration sites.

Text

In New Hanover County, the following types of facilities were included as secondary hazard risk consideration sites:

  • Toxic Release Inventory Sites
  • Solid Waste Facilities
  • Oil Facilities
  • National Pollutant Discharge Elimination System (NPDES) Permitted Sites
  • Hazardous Substance Disposal Sites

Other types of facilities that you may want to include in this analysis could range from nuclear power plants to underground storage tanks.

Hazardous Materials Risk Sites GIS Map
Figure 3.40

Step 6b: Identify intersections of secondary risk sites and natural hazard risk consideration areas.

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To help determine the threat from natural hazards to your secondary risk sites you now need to identify the risk summary scores associated with each of these locations.

Hazardous Materials Risk Sites GIS Map 2
Figure 3.41

Step 6c: Identify key environmental resource locations and their proximity to secondary risk sites.

Text The environmental resource sites identified for New Hanover County include wetlands, significant habitat areas, and fisheries nursery areas. A 1/8-mile buffer was created around the secondary risk sites to determine which of the environmental resource areas would be considered “at risk” from secondary hazard impacts. Similar to using the summary risk scores to target high-risk facilities, the proximity to environmental resource areas can be used to prioritize these secondary risk sites.

 

Wetlands GIS Map
Figure 3.42

Significant Natural Habitat Areas
Figure 3.43

Fisheries Nursery Area
Figure 3.44

The table below identifies both the risk summary scores and the number of environmental resource areas associated with each of the secondary risk sites.

Risk Summary Scores for Environmental Resources
Figure 3.45

Step 6d: Conduct vulnerability analysis on priority secondary risk sites as critical facilities.

TextWhile this step is largely up to the private sector, it is recommended that vulnerability assessment for secondary risk sites be addressed in a manner similar to critical facilities. You can take the first step by engaging key private sector establishments in hazard mitigation partnerships and asking them to assess their structural and operational vulnerability to hazards. At a minimum, the process you follow for analyzing the vulnerability of critical facilities can provide a guide for similar private sector activities.

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