Approval and Promulgation of Air Quality Implementation Plans; Massachusetts; One-hour Ozone Attainment Demonstration for the Massachusetts Portion of the Boston-Lawrence-Worcester, MA-NH Ozone Nonattainment Area

EPA is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Massachusetts. This action approves Massachusetts' one-hour ozone attainment demonstration for the Massachusetts portion of the Boston-Lawrence-Worcester, MA-NH serious ozone nonattainment area, submitted by the Massachusetts Department of Environmental Protection on July 27, 1998, and supplemented on September 6, 2002. This action is based on the requirements of the Clean Air Act (CAA) as amended in 1990, related to one-hour ozone attainment demonstrations. EPA is establishing an attainment date of November 15, 2007, for the entire multi-state nonattainment area, and is approving the 2007 motor vehicle emissions budgets submitted by Massachusetts for the Massachusetts portion of the nonattainment area. EPA is also finding the 2003 motor vehicle emissions budgets submitted previously by Massachusetts inadequate. A notice of proposed rulemaking was published on this action on October 15, 2002. EPA received comments on that proposal. In this action, EPA responds to those comments.