Connecticut Department of Energy & Environmental Protection

DEEP headquarters at 79 Elm Street in Hartford has partially re-opened to staff and members of the public as of Tuesday, February 3. The DEEP records room has re-opened. The DEEP Central Permit Processing Unit (CPPU) will be open to the public starting on Wednesday, Feb. 4. For updates, click here

What is the category of your existing stationary spark ignition engine of less than or equal to 500 horsepower (HP)?

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 Emergency  Non-emergency 4-stroke lean burn, rated between 100 and 500 horsepower, inclusive
 Non-emergency 2-stroke lean burn, rated between 100 and 500 horsepower, inclusive  Non-emergency 4-stroke lean burn, rated less than 100 horsepower
 Non-emergency 2-stroke lean burn, less than 100 horsepower.  Non-emergency 4-stroke rich burn, rated between 100 and 500 horsepower, inclusive
 Non-emergency 4-stroke rich burn, rated less than 100 horsepower

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