Many small businesses use internal combustion engines as part of their business operations. Depending on their size, age, fuel type and how they are used, these engines may be subject to DEP and/or EPA air regulations and possibly require certification or a permit, such as DEP’s GP-9.
Even if you only use the engines at your company for emergency power generation, you may still need a permit or certification and special recordkeeping and reporting may be required.
Unlimited use during emergencies
Non-emergency use limited to 100 hours per year
A valid U.S. EPA Certificate of Conformity
Requirements based on the type of fuel used.