Which acronym refers to a guideline for emergency response to hazardous substances?

The acronym ERPG stands for Emergency Response Planning Guidelines. This set of guidelines is specifically designed to assist emergency responders in assessing the potential impact of hazardous substances and determining appropriate response actions during incidents involving those substances. The guidelines provide a framework for understanding health risks associated with various chemicals and aid responders in making informed decisions to protect both their safety and the safety of the public.

In contrast, the other acronyms represent different concepts or organizations that do not specifically pertain to emergency response guidelines for hazardous substances. MEG typically refers to a Measure of Effectiveness in various contexts, HCP involves Health Care Plans, and SPCC relates to Spill Prevention, Control, and Countermeasure, which focuses on preventing oil spills and protecting against releases of petroleum products rather than providing generalized emergency response guidelines. Therefore, ERPG is distinctly focused on facilitating effective responses to hazardous material emergencies, making it the correct answer.