Air Quality Plans; California; San Diego County Air Pollution Control District; Permit Program

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the San Diego County Air Pollution Control District (SDAPCD or "District") portion of the California State Implementation Plan (SIP). The revision expands an existing provision that exempts tub grinders and trommel screens that process green material from permit requirements to include horizontal grinders and the processing of mixtures of green material and food material. The revision also adds a definition for "food material." This action is being taken pursuant to the Clean Air Act (CAA or "Act") and its implementing regulations.