Responsible Party On-Scene Coordinator (RPOSC)
Responsible Party On-Scene Coordinator (RPOSC) : Company employee responsible for coordinating the on-scene responsible party response to a hazardous materials or oil spill incident. The RPOSC will usually be an employee of the company causing the spill or the designated contractor to the spiller. The RPOSC may integrate with local, state, and federal on-scene coordinators in a Unified Command structure. Robert T