R307. Environmental Quality, Air Quality. 

R307-150. Emission Inventories. 

R307-150-l. Purpose and General Requirements. 

(1) The purpose ofRJOS-150 is: 

(a) to establish by rule the time ftame, pollutants, 

and information that sources must include in inventory 

submittals; and · 

(b) to establish consistent reporting requirements for 

stationary sources in Utah to determine wbe1her sulfur dioxide 

emissions remain belo'!Y the sulfur dioxide milestones 

established in the State Implementation Plan for Regional 

Haze, section XX.E.l.a, incorporated by reference in R307-

110-28. 

(2) The requirements of R307-1SO replace any 

annual inventory reporting requirements in approval orders or 

operating permits issued prior to December 4, 2003. 

(3) Emission inventories shall be submitted on or 

before ninety days following the effective date of this rule and 

thereafter on or before April IS of each year following the 

calendar year for which an inventory is required. The 

inventory shall be submitted in a fonnat specified by the 

Division of Air Quality following consultation with each 

source. 

(4) The executive secretary may require at any time 

a full or partial year inventory upon reasonable notice to 

affected sources when it is determined that the inventory is 

necessary to develop a state implementation plan, to assess 

whether there is a threat to public health or safety or the 

environment. or to determine whether the source is in 

compliance with R307. 

(5) Recordkeeping Requirements. 

{a) Each owner or operator of a stationary source 

subject to this rule shall maintain a copy of the emission 

inventory submitted to the Division of Air Quality and records 

indicating how the infonnation submitted in the inventory was 

determined, inehlding any calculations, data, measurements, 

and estimates used. The records under R307-1S0-4 shall be 

kept for ten years. Other records shall be kept for a period of at 

least five years from the due date of each inventory. 

(b) The owner or operator of the stationary source 

shall make these rewrds available for inspection by any 

representative of the Division of Air Quality during nonnal 

business hours. 

R307-150-2. Definitions. 

The following additional definitions apply to R307-

ISO. 

"Acute Contaminant" means any nonC81'cinogenic air 

contaminant for which a threshold limit value- ceiling (ILVC) has been adopted by the American Conference of 

Governmental Industrial Hygienists in its "Threshold Limit 

Values for Chemical Substances and Physical Agents arid 

Biological Exposure Indices," 2003 edition. 

"Carcinogenic Contaminant" means any air 

contaminant that is classified as a known human carcinogen 

(AI) or suspected human carcinogen (A2) by the American 

· Conference of Governmental Industrial Hygienists in its 

"Threshold Limit Values for Cbemical Substances and 

Physical Agents and Biological Exposure Indices," 2003 

edition. 

"Chronic Contaminant" means any nonC81'cinogenic 

air contaminant for which a threshold limit value - time 

weighted average (IL V-TWA) having no threshold limit value 

- ceiling (U V -C) has been adopted by the American 

Conference of Governmental Industrial Hygienists in its 

''Threshold Limit Values for . Chemical Substances and 

Physical Agents and Biological Exposure Indices," 2003 

edition. 

"Dioxins" and "Furans" mean total tetra- through 

octacblorinated dibenzc>.p-dioxins and dibenzofurans. 

"Emissions Wlit" means emissions unit as defined in 

R307-415-3. 

"Large Major Source" means a major source that 

emits or has the potential to emit 2500 tons or more per year of 

oxides of sulfur, oxides of nltrogen, or carbon monoxide, or 

that emits or has the potential to emit 250 tons or more per year 

ofPMIO, PM2.5, volatile organic compounds, or ammonia 

"Lead" means elemental lead and the portion of its 

compounds measured as elemental lead. 

"Major Source" means major source as defined in 

R307-415-3. 

R307-150-3. Applicability. 

(I) R307-150-4 applies to all stationary sources 

with actual emissions of 100 tons or more per year of sulfur 

dioxide in calendar year 2000 or any subsequent year unless 

exempted in (a) below. Sources subject to R307·150-4 may be 

subject to other sections of R307-l 50. 

(a) A stationary source that meets the requirements 

of R307-150-3(1) that has penn3nentty ceased operation is 

exempt ftom the requirements of R307-!S0-4 for all years 

during which the source did not operate at any time during the 

year. 

(b) Except as provided in (a) above, any source that 

meets the criteria of R307-150-3(1) and that emits less than 

I 00 tons per year of sulfur dioxide in any subsequent year shall 

remain subject to the requirements of R307 -I S0-4 W1til 2018 

or until the first control period under the Western Backstop 

Sulfur Dioxide Trading Program as established in R307-250-

12(1Xa), whichever is earlier. 

source; 

(2) R307-l 50-S applies to large major sources. 

(3) R307-1 50-6 applies to: 

(a) each major source that is not a large major 

(b) each source with the potential to emitS tons or 

more per year of lead; and 

(c) each source not included in (2) or (3)(a) or (3)(b) 

above that is located in Davis, Salt Lake, Utah, or Weber 

Cowrties and that has the potential to emit 25 tons or more per 

year of any combination of oxides of nitrogen, oxides of sulfur 

and PMIO, or the potential to emit 10 tons or more per year of 

volatile organic compoWlds. 

(4) R307-150-7 applies to Part 70 sources not 

included in (2) or (3) above. 

R307-1S0-4. Sulfur Dioxide Milestone Inventory 

Requirements. 

(1) Annual Sulfur Dioxide Emission Report. 
(a) Sources identified in R307-150-3(1) shall submit 

an annual inventory of sulfur dioxide emissions beginning with 

calendar year 2003 for all emissions units including fugitive 

emissions. 

(b) The inventory shall include the rate and period 

of emissions, excess or breakdown emissions, startup and shut 

down emissions, the specific emissions unit that is the source 

of the air pollution, type and efficiency of the air pollution 

control equipment, percent of sulfur content in fuel and how 

the percent is calculated, and other information necessary to 

quantify operation and emissions and to evaluate pollution 

control efficiency. The emissions of a pollutant shall be 

calculated using the source's actual operating hours, production 

rates, and typeS of materials processed, stored, or combusted 

during the inventoried time period. 

(2) Each source subject to R307-150-4 that is also 

subject to 40 CFR Part 75 reporting requirements shall submit 

a summary report of annual sulfur dioxide emissions that were 

reported to the Environmental Protection Agency under 40 

CFR Part 75 in lieu of the reporting requirements in (I) above. 

(3) Olanges in Emission Measurement Techniques. 

Each source subject to R307- 1S0-4 that uses a different 

emission monitoring or calculation method than was used to 

report their sulfur dioxide emissions in 2006 under R307-1SO 

or 40 CFR Part 75 shall adjust their reported emissions to be 

comparable to the emission monitoring or calculation method 

that was used in 2006. The calculations that are used to make 

this adjustment shall be included with the annual emission 

report. 

R307-150-5. Sources Identified in R307-1S0-3(2), Large 

Major Source IDventory Requirements. 

(1) Each large major sow-ce shall submit an 

emission inventory annually beginning with calendar year 

2002. The inventory shall include PMIO, PM2.5, oxides of 

sulfur, oxides of nitrogen, carbon monoxide, volatile organic 

compounds, and ammonia for all emissions units including 

fugitive emissions. 

(2) For every third year beginning with 2005, the 

inventory shall also include all other chargeable pollutants and 

hazardous air pollutants not exempted in R307 -1 50-8. 

(3) For each pollutant specified in (I) or (2) above, 

the inventory shall include the rate and period of emissions, 

excess or breakdown emissions, startup and shut down 

emissions, the specific emissions unit that is the source of the 

air pollution, composition of air contaminant, type and 

efficiency of the air pollution control equipment, and other 

information necessary to quantify operation and emissions and 

to evaluate pollution control efficiency. The emissions of a 

pollutant shall be calculated using the source's actual operating 

hours, production rates, and types of materials processed, 

stored, or combustcd during the inventoried time period. 

R307-1S0-6. Sources Identified in R307-IS0-3(3). 

(I) Each source identified in R307-150-3(3) shall. 

submit an inventory every third year beginning with calendar 

year 2002 for all emissions units including fugitive emissions. 

(a) The inventory shall include PM 10, PM2.5, 

oxides of sulfur, oxides of nitrogen, carbon monoxide, volatile 

organic compounds, ammonia, other chargeable pollutants, and 

hazardous air pollutants not exempted in R307-l 50-8. 

(b) For each pollutant, the inventory shall include 

the rate and period of emissions, excess or breakdown 

emissions, starlllp and shut down emissions, the specific 

emissions unit which is the source of the air pollution, 

composition of air contaminant, type and efficiency of the air 

pollution control equipment, and other information necessary 

to quantify operation and emissions and to evaluate pollution 

control efficiency. The emissions of a pollutant shall be 

calculated using the source's actual operating hours, production 

rates, and types of materials processed, stored, or combusted 

during the inventoried time period. 

(2) Sources identified in R307-IS0-3(3) shall 

submit an inventory for each year after 2002 in which the total 

amount of PMIO, oxides of sulfur, oxides of nitrogen, carbon 

monoxide, or volatile organic compounds increases or 

decreases by 40 tons or more per year from the most recently 

submitted inventory. For each pollutant, the inventory shall 

meet the requirements ofR307-150-6{1Xa) and (b). 

R307-150-7. Sources Identified in R307-156-3(4), Other 

Part 70 Sources. 

(1) Sources identified in R307-150-3(4) shall 

submit the following emissions inventory every third year 

beginning with calendar year 2002 for all emission units 

including fugitive emissions. 

(2) Sources identified in R307-IS0-3(4) shall 

submit an inventory for each year after 2002 in which the total 

amount of PM1 0, oxides of sulfur, oxides of nitrogen, carbon 

monoxide, or volatile organic compounds increases or 

dcaeases by 40 tons or more per year from the most recently 

submitted inventol)'. 

(3) The emission inventory shall include individual 

pollutant totals of all chargeable pollutants not exempted in 

R307-15o-8. 

R307-150-8. Exempted Hazardous Air Pollutants. 

(I) The following air pollutants are exempt from 

this rule if they are emitted in an amount less than that listed in 

Table l. 

CONTAMINANT Arse<~ic 

Benzene 

Bery1111111 

Ethylene oxide 

fol"'llll cHI1yde 

TABlE 1 

Pounds/yen 

0.21 

3).90 

0.04 

38.23 

S.8J 

(2) Hazardous air pollutants, except for dioxins or 

furans, are exempt from being reported if they are emitted in an 

amount less than the smaller of the following: 

(a) 500 pounds per year; or 

(b) for acute contaminants, the applicable 1LV-c 

expressed in milligrams per cubic meter and multiplied by 

15.81 to obtain the powlds-per-year threshold; or 

(c) for chronic contaminants, the applicable 1LV1W A expressed in milligrams per cubic meter and multiplied 

by 21.22 to obtain the poun~per-year threshold; or 

(d) for carcinogenic contaminants, the applicable