Isolation distances

Plants used to produce PRPs should be amenable to confinement . Isolation distances were increased, and the cultivation of food and feed crops following a PRP crop was discouraged. New hazard and exposure data for human and livestock health assessment may also be required from PRP-containing traditional food or feed crops prior to the approval of field trials. Exposure risk concerns the potential for PRPs to be present in human food or animal feed, and where exposure can occur, what mechanisms are used to limit biological activity. Hazards included direct toxicity and allergenicity in humans or animals as well as hazards presented by the coproduct streams that result from processing. These latter requirements could place a major burden on proponents to prove their materials are safe prior to even confined field trials. 

Strength Personnel initially isolated the incident scene and surrounding area through conservative estimation by the ACSO shift supervisor. DOT Emergency Response Guide was used to determine 1.5 mile radius as initial protective isolation distance. Electronic version to be added to CP (Command Post) laptops. Key representatives of fire, law enforcement and emergency services at Command Post actively discussed evacuation versus shelter-in-place. 

Establish isolation distance and restrain entry law enforcement officers should establish an outer perimeter, and completely secure the scene. 

Downwind Refers to the direction toward which tire prevailing wind is blowing. This term is important in evaluating the risks for potential receptors in die pathways of pollutant discharges. The reader should refer to Chapter 8 for a discussion of spills and isolation distances downwind from the source. 

Immediately isolate an area around any liquid or solid contamination for at least 700 feet in all directions. If possible, identify the agent and develop a downwind hazard diagram (see Table 3.2). Adjust the initial isolation distance as appropriate. Based on the type of release, amount of material aerosolized, persistence of the agent and local conditions (e.g., weather, population density, time of day), shelter-in-place until the initial cloud passes may be the most appropriate course of action since timely evacuation of the threatened downwind population may not be possible. Depending on the persistence of the agent and the potential for condensation of agent from the cloud, evacuation of the threatened population after passage of the initial cloud may be appropriate. 

Immediately isolate an area around any liquid or solid contamination for at least 400 feet in all directions. If possible, identify the agent and develop a downwind hazard diagram (see Table 3.2). Adjust the initial isolation distance as appropriate. Based on the type of release, amount of material aerosolized, persistence of the agent and local conditions (e.g., weather. 

A simplified downwind hazard assessment can be developed by plotting these protective action distances in the form of a map overlay. The initial isolation distance is the radius of a circle immediately surrounding the point of release where people may potentially be exposed to dangerous or life threatening concentrations of vapor. The downwind distances indicate the area of potential threat posed by vapors carried by the wind. The downwind threat... 

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