R307. Environmental Quality, Air Quality. R307-311. Utah County: Trading ofEmission Budgets for Transportation Conformity. R307-311-1. Purpose. This rule establishes the procedures that may be used to trade a portion of the primary PM 10 budget when demonstrating that a transportation plan, transportation improvement program, or project conforms with the motor vehicle emission budgets in the Utah County portion ofSection IX, Part A ofthe State Implementation Plan, "Fine Particulate Matter (PMIO)"

R307-3l l-2. Definitions. The definitions contained in 40 CFR 93

. 101 , effective as of the date referenced in R307-IOl-3, are incorporated into this rule by reference. The following additional definitions apply to this rule. "Budget" means the motor vehicle em1ss1on projections used in the attainment demonstration in the Utah County portion of Section IX, Part A of the State Implementation Plan, "Fine Particulate Matter (PMI0)

." "NOx" means oxides ofnitrogen

. "Primary PM10" means PMIO that is emitted directly by a source
. Primary PMI0 does not include particulate matter that is formed when

.gaseous emissions undergo chemical reactions in the ambient air

. ''Transportation Conformity" means a demonstration that a transportation plan, transportation improvement program, or project conforms with the· emissions budgets in a state implementation plan, as outlined in 40 CFR, Chapter I, Part 93, "Determining Conformity of Federal Actions to State or Federal Implementation Plans

."

R307-311-3. Applicability. (I) This rule applies to agencies responsible for demonstrating transportation conformity with the Utah County portion ofSection IX, Part A ofthe State Implementation Plan, "Fine Particulate Maner (PMIO)." (2) This rule does not apply to emission budgets from Section IX, Part C.6 of the State Implementation Plan, "Carbon Monoxide Maintenance Plan."

R307-3ll-4. Trading Between Emission Budgets. (I) The agencies responsible for demonstrating transportation conformity are authoriz.ed to supplement the budget for NOx with a portion ofthe budget for primary PMI0 for the purpose of demonstrating transportation conformity for NOx

. The NOx budget shall be supplemented using the following procedures. (a) The metropolitan planning organiz.ation shall include the following information in the transportation conformity demonstration: (i) The budget for primary PM10 and NOx for each required year ofthe conformity demonstration, before trading allowed by this rule has been applied; (ii) The portion of the primary PM 10 budget that will be used to supplement the NOx budget, specified in tons per day using a I:I ratio of primary PMI0 to NOx, for each required year ofthe conformity demonstration; (iii) The remainder ofthe primary PMIO budget that will be used in the conformity demonstration for primary PM10, specified in tons per day for each required year ofthe conformity demonstration; and (iv) The budget for primary PMIO and NOx for each required year ofthe conformity demonstration after the trading allowed by this rule has been applied. (b) Transportation conformity for NOx shall 

### be demonstrated using the NOx budget supplemented by a portion of the primary PMIO budget as described in (aXii). Transportation conformity for primary PMIO shall be demonstrated using the remainder ofthe primary PMIO budget described in (aXiii). (c) The primary PMIO budget shall not be supplemented by using a portion oftheNOxbudget.

KEY: air pollution, transportation conformity, PMIO Date of Enactment or Last Substantive Amendment: March S, 2015 Authorizing, and Implemented or Interpreted 

### Law: 19-2- 104

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