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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
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REGION 8
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1595 Wynkoop Street
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DENVER, CO   80202-1129
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Phone 800-227-8917
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http://www.epa.gov/region08
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Ref:  8RA									November 5, 2013

MEMORANDUM for RECORD

SUBJECT:	Phone call from Colleen Delaney, Utah DEQ, on Sept. 20, 2013 regarding our proposed disapproval of the definition of Major Source Baseline Date in the GHG Tailoring Rulemaking Notice. 

FROM:	Jody Ostendorf
		SIP Program Manager 

TO:		Docket ID:  EPA-R08-OAR-2012-0300

	During this phone call, Colleen brought to my attention that a subsequent SIP submittal had removed the Major Source Baseline Date definition that we had previously proposed to disapprove.  We proposed to disapprove R307-405-3(2)(a)(i), consistent with our final action on July 15, 2011 (76 FR 41712),  because it defines "Major Source Baseline Date" in a manner inconsistent with the federal definition.  However, Utah removed the Major Source Baseline Date in a subsequent March 19, 2012 SIP submittal. In our final action on that submittal, which was signed on September 30, 2013 (78 Fed Reg. 63,883), we incorporated into the SIP the required definition for State programs at 40 CFR 51.166(b)(14): 
(i)  "Major source baseline date" means:
(a)  In the case of PM10 and sulfur dioxide, January 6, 1975;
(b)  In the case of nitrogen dioxide, February 8, 1988; and
(c)  In the case of PM2.5 , October 20, 2010.
      Because we have re-established and incorporated into Utah's SIP the required definition of Major Source Baseline Date in our September 30, 2013 final action, we do not need to act on it here.

