Stationary Compression and Spark Ignition Internal Combustion Engine Rule Revisions Proposed

On May 21, 2010, U.S. EPA proposed amendments to 40 CFR Part 60, Subparts IIII (Standards of Performance for Stationary Compression Ignition Internal Combustion Engines) and Subpart JJJJ (Standards of Performance for Stationary Spark Ignition Internal Combustion Engines). The proposed rule would make the following changes to the existing Subpart IIII and JJJJ rules:

1. Implement more stringent standards for stationary compression ignition engines with displacement greater than or equal to 10 liters per cylinder and less than 30 liters per cylinder consistent with recent revisions to standards for similar mobile source marine engines (Subpart IIII). 
2. Allow owners and operators to develop their own operation and maintenance plans as an alternative to following manufacturer provided operation and maintenance procedures (Subpart IIII). Note: Owners and operators that choose this revised approach to operation and maintenance will generally be subject to additional testing and will be required to keep maintenance plans and records. 
3. Clarify the applicability of Subparts IIII and JJJJ to the installation and operation of temporary engines (i.e., engines in one (1) location for less than one (1) year) (Subparts IIII and JJJJ). 
4. Revise the requirements for engines with displacement at or above 30 liters per cylinder to align more closely with recent standards for similar mobile source marine engines, and for engines in rural portions of Alaska that are not accessible by the Federal Aid Highway System (Subpart IIII). 
5. Add a definition for “reconstruct” that is specific to Subpart IIII and JJJJ. 
6. Revise the standards of performance for new stationary spark ignition internal combustion engines to mirror certain revisions proposed for compression ignition engines (Subpart JJJJ). 

U.S. EPA will accept comments on the proposed amendments to 40 CFR Part 60, Subparts IIII and JJJJ rule until 60 days following the publication of the proposed amendments in the Federal Register.