Guidance on Removing Stage II Gasoline Vapor Control Progrmas from State Implementation Plans and Assessing Comparable Measures.

摘要

On May 9, 2012, the EPA Administrator signed a notice of final rulemaking determining that onboard refueling vapor recovery (ORVR) systems are in widespread use throughout the motor vehicle fleet which was published in the Federal Register on May 16, 2012 (77 FR 28772). In that notice the Administrator also exercised her authority to waive the statutory requirement that Serious, Severe, and Extreme ozone nonattainment areas adopt and implement EPA programs requiring Stage II gasoline vapor recovery systems (VRS) at certain gasoline dispensing facilities (GDFs). Many states and local areas have previously adopted Stage II programs into their state implementation plans (SIPs). This guidance document provides both technical and policy recommendations to states and local areas on how to develop and submit an approvable SIP revision seeking to remove or phase-out an existing Stage II program. This guidance introduces methods and equations that could be used to calculate the emissions consequences of discontinuing Stage II control programs for purposes of demonstrating compliance with specific CAA provisions in sections 110(.) and 193 governing EPA approval of SIP revisions. This document also includes new technical and policy guidance, updating that previously issued by EPA in 1995, for areas of the Ozone Transport Region (OTR) on implementing measures capable of achieving emissions reductions comparable to those achievable by ongoing implementation of Stage II controls.