R307. Environmental Quality, Air Quality. 

R307-311. Utah County: Trading of Emission 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 of Section 

IX, Part A of the State Implementation Plan, "Fine Particulate 

Matter (PMIO)" 

R307-3 l 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 (PM I 0)." 

"NOx" means oxides ofnitrogen. 

"Primary PM 10" means PMIO that is emitted directly 

by a source. Primary PM I 0 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 of Section IX, Part A of the 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 of the budget for primary PM I 0 

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 of the 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 PM I 0 to NOx, for each 

required year of the conformity demonstration; 

(iii) The remainder of the primary PMIO budget that 

will be used in the conformity demonstration for primary 

PM 10, specified in tons per day for each required year of the 

conformity demonstration; and 

(iv) The budget for primary PMIO and NOx for each 

required year of the 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 of the primary PMIO budget 

described in (aXiii). 

(c) The primary PMIO budget shall not be 

supplemented by using a portion of the NOx budget. 

KEY: air pollution, transportation conformity, PMIO 

Date of Enactment or Last Substantive Amendment: 

March S, 2015 

Authorizing, and Implemented or Interpreted Law: 19-2-

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