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Approval and Promulgation of Maintenance Plan for Air Quality Planning Purposes for the State of Washington: Carbon Monoxide
[Federal Register: October 21, 1996 (Volume 61, Number 204)] [Rules and Regulations] [Page 54560-54563] From the Federal Register Online via GPO Access [wais.access.gpo.gov]
ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 52 and 81 [WA53-7126 FRL-5637-3] Approval and Promulgation of Maintenance Plan for Air Quality Planning Purposes for the State of Washington: Carbon Monoxide AGENCY: Environmental Protection Agency. ACTION: Final rule.
SUMMARY: The Environmental Protection Agency (EPA) is redesignating the Vancouver nonattainment area to attainment for the carbon monoxide (CO) air quality standard and approving a maintenance plan that will insure that the area remains in attainment. Under the Clean Air Act (CAA) as amended in 1990, designations can be revised if sufficient data is available to warrant such revisions. In this action, EPA is approving the Washington Department of Ecology's request because it meets the redesignation requirements set forth in the CAA. In addition, EPA is approving a related State Implementation Plan (SIP) revision, the 1990 base year emission inventory for CO emissions, which includes emissions data for sources of CO in the Vancouver, Washington CO nonattainment area. EFFECTIVE DATE: This rule is effective as of October 21, 1996. ADDRESSES: Copies of the State's redesignation request and other information supporting this action are available during normal business hours at the following locations: EPA, Alaska-Washington Unit (OAQ- 107), 1200 Sixth Avenue, Seattle, Washington, 98101, and the Washington State Department of Ecology, Air Quality Program, P.O. Box 47600, Olympia, Washington, 98504-7600. FOR FURTHER INFORMATION CONTACT: William M. Hedgebeth, EPA Region 10, Office of Air Quality, at (206) 553-7369. SUPPLEMENTARY INFORMATION: I. Background In a March 15, 1991, letter to the EPA Region 10 Administrator, the Governor of Washington recommended that the Vancouver portion of the Portland-Vancouver Air Quality Maintenance Area be designated as nonattainment for carbon monoxide (CO) as required by section 107(d)(1)(A) of the 1990 Clean Air Act Amendments (CAAA) (Public Law 101-549, 104 Stat. 2399, codified at 42 U.S.C. 7401-7671q). The area was designated nonattainment and classified as ``moderate,'' with a design value less than or equal to 12.7 ppm under the provisions outlined in sections 186 and 187 of the CAA. (See 56 FR 56694 (Nov. 6, 1991), codified at 40 CFR Sec. 81.348.) On September 29, 1995, EPA approved the separation of the Portland-Vancouver CO nonattainment area into two distinct nonattainment areas, effective November 28, 1995. Because the Vancouver area had a design value of 10 ppm (based on 1988- 1989 data), the area was considered moderate. The CAA established an attainment date of December 31, 1995, for all moderate CO areas. The Vancouver area has ambient monitoring data showing attainment of the CO National Ambient Air Quality Standard (NAAQS) since 1992. On March 19, 1996, the Washington State Department of Ecology (Washington) submitted a CO redesignation request and a request for approval of a CO maintenance plan for the Vancouver area. On July 29, 1996, EPA proposed to approve Washington's requested redesignation and maintenance plan. Washington has met all of the CAA requirements for redesignation pursuant to section 107(d)(3)(E). EPA has approved all SIP requirements for the Vancouver area that were due under the 1990 CAA.
Washington provided monitoring, modeling and emissions data to support its redesignation request. The 1992 CO attainment emissions inventory totals in tons per day are 76.43, 15.14, 164.3, and 67.84, respectively, for the area, non-road, mobile, and point sources. The emission budget established through the year 2006 is as follows: Vancouver CO Emission Budget [Pounds per winter day] 1992 1995 1997 2001 2003 2006