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C> 4D 40 10,0 PROTECTIVE ACTIONS 10,1 GENERAL The purpose of this section is to establish the range of protective actions that are available to stage and local governments for the protection of the public. Protective actions which may be initiated to provide for the safety of the public may include any or all of the following: Notification of affected residents and transients to seek immediate in-place shelter; Evacuation of transients and residents within designated sectors exposed to a plume of hazardous materials to shelter areas outside the affected area; and Control of entrance into affected areas. Implementation of procedures to prevent the consumption and distribution of contaminated food and water supplies. - Implementation of procedures to decontaminate persons exposed to hazardous materials. 10.2 VULNERABLE ZONES A vulnerable zone is an estimated geographical area that may be subject to concentrations of an airborne extremely hazardous substance (EHS) at levels that could cause irreversible acute health effects or death to persons within the area following an accidental release. Vulnerable zones are based on estimates of the quantity of an EHS released to air, the rate of release to air, airborne dispersion and the airborne concentration that could cause irreversible health effects or death. 10.3 LEVELS OF CONCERN A Level of Concern {LOC} is the concentration of an EHS in the air above which there may be serious irreversible health effects or death as a result of a single exposure for a relatively short period of time. There is no precise measure of an LOC for the chemicals listed as EHSs. The surrogate or estimated LOC's being used for each EHS are found in Appendix A. For the purpose of this plan, an LO(' has been estimated by tndian River County Emergency Plan for Hazardous Materials Page 117