The general approach to emergency planning is to have a corporate or agency emergency (contingency) response plan, then support this plan with a series of operational guidelines. Operational guidelines can be more detailed and specific on either the ICS process or technical response. Here are three such guidelines for your use.
To support the Operational Guideline on ICP, EnviroEmerg can provide a comprehensive set of ICP signage as shown in the guide for both Mac or Window systems. Just send an e-mail making a request for the files.