Which group classification includes occupancies that may have manufacturing, processing, or storage of hazardous materials beyond allowed limits?

The classification that includes occupancies where manufacturing, processing, or storage of hazardous materials may exceed allowable limits is indeed Group H. This group is specifically designed to address facilities that handle hazardous materials in a way that poses risks to life safety and requires stringent regulations to mitigate those risks.

Group H occupancies are characterized by their potential for materials that can be explosive, flammable, or toxic, necessitating additional safety measures, stricter building codes, and specialized training for personnel who work in or respond to emergencies in these environments. Understanding this classification is crucial for firefighters, as it guides how they approach emergency situations in buildings that fall under this category, ensuring that they are prepared for the specific hazards present.

In contrast, other groups like Group M (mercantile), Group E (educational), and Group L (laboratories) have different focus areas that do not center around the extensive handling and storage of hazardous materials, thus making Group H the correct choice in this context.