What is the required action when a commercial truck carrying dangerous substances (Decreto 298) is involved in an accident involving a hazardous chemical spill on a public highway?

1. Abandon the truck and hitchhike home
2. Secure the perimeter, keep unauthorized persons upwind and at a safe distance, consult the Hoja de Datos de Seguridad (HDST), notify emergency services (133, 132, 131) and the chemical manufacturer's emergency phone, and avoid entering chemical vapor clouds
3. Wash the chemical spill down public storm drains with tap water
4. Light a match to see if the chemical is flammable