Carbon Monoxide Maintenance Plan
 

Ft Collins 

Technical Support Document
 

Emission Inventory
 

November 26, 2010 

Colorado Department of Public Health and Environment
 

Air Pollution Control Division
 

4300 Cherry Creek Drive South
 

Denver, Colorado 80246
 
Colorado Department of Public Health and Envirorunent / Air Pollution Control Division 

Table of Contents 

1. EMISSION INVENTORY METHODOLOGY 1
 

2. 2008 EMISSION INVENTORy 2
 

3. 2008 EMISSION INVENTORY SUMMARY 3
 

4. REFERENCES 3
 

CO Maintenance Planfor Fort Collins - Technical Support Document, Nov. 26, 2010 - Emission Inventory 

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Colorado Department of Public Health and Environment / Air Pollution Control Division 

1. Emission Inventory Methodology 

The Air Pollution Control Division (APCD) developed the 2008 emission inventory in the 

"Carbon Monoxide Maintenance Plan for Ft Collins" using U.S. Environmental Protection Agency 

(EPA) approved emissions modeling methods, including EPA's MOVES model and local VMT 

data for on-road mobile source emissions, EPA's non-road model, local demographic information 

for area and off-road sources, and reported actual emissions for point sources. The inventory 

represents average daily winter emissions. The MOVES and non-road model inputs represent 

these average daily winter conditions. Heating and wood burning emissions were apportioned 

from annual emission estimates by heating degree day data from the Western Regional Climate 

Center. Other source categories were apportioned from annual to daily by dividing by 365. 

Highway mobile source emissions are from the EPA model MOVES, an emission factor model for 

predicting gram per mile emissions of Hydrocarbons (HC), Carbon Monoxide (CO), Nitrogen 

Oxides (NOx), Carbon Dioxide (C02), Particulate Matter (PM), and toxics from cars, trucks, and 

motorcycles under various conditions. 

Non-road source emissions are from the EPA Non-Road Model. This model includes the impact of 

future controls on non-road engines, which is used in equipment such as lawn and garden 

equipment and construction equipment.. 

Area source emissions (including heating, construction, commercial cooking, etc.) are from the 

2008 EPA National Emissions Inventory (NEI), grown to 2008 by population growth from data 

from the State. For more documentation for these categories, refer to the NEI documentation 

(EPA, 2008). Wood burning emissions were calculated using local data and EPA AP-42 emission 

factors. 

The MOVES and Non-Road Models and the NEI report emissions for Larimer County as a whole. 

Emissions were apportioned to the Attainment Area using geographical information system (GIS) 

techniques, using population, VMT and land area. 

Under Air Quality Control Commission Regulation No.3, the APCD requires any source that 

emits two tons per year or greater to submit an Air Pollutant Emission Notice (APEN) (APCD, 

2008). This means that sources that emit less than two tons per year are not necessarily accounted 

for in an emissions inventory. The point source emissions for Ft Collins were obtained from this 

tracking system. The emission estimates are made using a variety of methodologies. Data from 

source-specific emission tests, or continuous emission monitors are preferable, but not always 

available. The EPA has developed a variety of emission factors to estimate emissions as well. 

Emission factors are frequently the best or only method available for estimating emissions. 

CO Maintenance Planfor Fort Col/ins - Technical Support Document, Nov. 26, 2010 - Emission Inventory 

1 
Colorado Department ofPublic Health and Environment / Air Pollution Control Division 

2. 2008 Emission Inventory 

This section presents the 2008 emission inventory for the maintenance plan. 

Table 1. 2008 CARBON MONOXIDE Emission Inventory (tons per day). 

~nventory Summary CO (TonslDay: 

HELIPORT 0.009 

Commercial Cooking 0.041 

Fuel Combustion 0.428 

Non-Road 14.161 

Structure Fires 0.026 

WoodburninQ 7.642 

HiQhway Vehicles 64.624 

BioQenic 0.275 

Railroads 0.006 

Point Sources 0.503 

TOTAL 87.715 

~Point Sources 

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. J 

0030 AVAGO TECHNOLOGIES US, INC. 0.03 

0011 COLORADO STATE UNIV CSU FACILITY SVCS 0.12 

0032 POUDRE VALLEY HOSP 0.01 

0060 ANHEUSER BUSCH INC 0.06 

0068 ALLNUn FUNERAL SERVICE, INC. 0.00 

0073 CITY OF FORT COLLINS DRAKE WATER RECLAMA 0.01 

k>107 FOOTHILLS SQUARE 0.00 

0331 CITY OF FORT COLLINS STREETS DEPT 0.00 

0387 GOES FUNERAL CARE & CREMATORY 0.00 

0390 NEW BELGIUM BREWING COMPANY, INC. 0.01 

0400 LAFARGE DBA LAFARGE WEST, INC. 0.25 

0428 INTEL CORPORATION - FT COLLINS 0.01 

TOTAL 0.50 

CO Maintenance Plan/or Fort Collins - Technical Support Document, Nov. 26, 2010 - Emission Inventory 

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Colorado Department of Public Health and Environment / Air Pollution Control Division 

3. 2008 Emission Inventory Summary 

This section presents the 2008 emission inventory summary for the maintenance plan. 

Table 2. 2008 CARBON MONOXIDE Emission Inventory Summary (tons per day). 

Emission Inventory Summary CO (tid) 

HELIPORT 0.009 

Commercial Cooking 0.041 

Fuel Combustion 0.428 

Non-Road 14.161 

Structure Fires 0.026 

WoodburninQ 7.642 

Highway Vehicles 64.624 

Biogenic 0.275 

Railroads 0.006 

Point Sources 0.50 

TOTAL 87.715 

4. References 

APCD, 2008. Air Quality Control Commission Regulation Number 3. Stationary Source 

Permitting and Air Pollutant Emission Notice Requirements. 5 CCR 1001-5. 

< http://www.cdphe.state.co.us/regulations/airregs/1 00 103stationarysourcepermitting.pdf > 

U.S. EPA, 2010. "2008 National Emissions Inventory Data & Documentation." 

< http://www.epa.gov/ttn/chie£.net/2008inventory.html > 

CO Maintenance Plan/or Fort Collins - Technical Support Document, Nov. 26, 2010 - Emission Inventory 

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