Regulacje i polityka gospodarcza · 18.09.2007

Nonroad Diesel Technical Amendments and Tier 3 Technical Relief Provision

In this rulemaking, EPA is making certain technical corrections to the rules establishing emission standards for nonroad diesel engines. In addition, we are amending those rules to provide nonroad diesel equipment manufacturers with a production technical relief provision for Tier 3 equipment which is similar to the technical relief provision already available for Tier 4 equipment. Like the Tier 4 provisions, the new Tier 3 technical relief provision deals with a situation where an equipment manufacturer which is not vertically integrated with its engine supplier is unable to complete redesign of the equipment within the time required by rule (here, the Tier 3 rule). To be eligible, the equipment manufacturer must show both that its inability to furnish a compliant equipment design is due to the engine supplier, and that the equipment manufacturer has exhausted other flexibilities already provided by the Tier 3 rule. The amount of relief under the Tier 3 technical relief provision is somewhat less than is available under the parallel Tier 4 provision, however. The Tier 3 Technical flexibility will apply up to a maximum of an additional 50% of production beyond the original 80% prov