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RR OTEC-nVE ACTION D ELISION FACTO R S TO CONE I DE R <br /> The choice of protective actions for a given situation depends on a number of factors. For <br /> some cases, evacuation may be the best option; in others, sheltering-ire-place may be the <br /> best course. Sometimes, these two actions may be used in combination. In any emergency, <br /> officials need to quickly g ive the publ is instructions. The public will need continui ng i nformation <br /> and instructions while being evacuated or sheltered-ire-place. <br /> Proper evaluation of the factors I isted be low wi I I dete rmi ne the effectiveness of evacuatic n or <br /> in-place protection (shelter-irkplace). The importance of these factors can vary with emergency <br /> conditions. In specific emergencies,other factors may need to be identified and considered as <br /> well. Thi s list i nd icates what kind of information may be needed to make the initial deci Sion. <br /> The hazardous materi alsidan ge r o u s goods: <br /> F degree of health hazard <br /> chemical and physical properties <br /> amount involved <br /> containment/control of release <br /> • rate of vapor movement <br /> The population threatened: <br /> location <br /> number of people <br /> ti me avai lable to evacuate or she Ite r-i n.-place <br /> ability to control evacuation or shelter-in-place <br /> boil di ng types and avai I abili ty <br /> F s pecial i n Stltuti ons or populations, e.g., nursing homes, hospitals. pri son s <br /> The weather conditions: <br /> F effect on vapor and cloud movement <br /> potential for change <br /> effect on evacuation or shelter-in-place <br />