PM10 Maintenance Plan

Cañon City

Technical Support Document

Emission Inventory

FINAL

November 10, 2008

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 Environment / Air Pollution Control Division

PM10 Maintenance Plan for Cañon City - Technical Support Document - Emission Inventory

ii

Table of Contents

1. EMISSION INVENTORY METHODOLOGY..................................................................................................1

2. 2006 EMISSION INVENTORY SUMMARY.....................................................................................................2

3. 2020 EMISSION INVENTORY SUMMARY.....................................................................................................3

4. REFERENCES ......................................................................................................................................................4
Colorado Department of Public Health and Environment / Air Pollution Control Division

PM10 Maintenance Plan for Cañon City - Technical Support Document - Emission Inventory

1

1. Emission Inventory Methodology

The Air Pollution Control Division (APCD) developed the 2006 and 2020 emission inventories in 

the “PM10 Maintenance Plan for Cañon City” using U.S. Environmental Protection Agency (EPA) 

approved emissions modeling methods, including EPA’s MOBILE6 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. Estimates for future 

emissions are based on the above-mentioned tools and the EPA’s Economic Growth and Analysis 

System (EGAS) model for estimating future point sources activity, and VMT growth for on-road 

mobile sources. 

Highway mobile source emissions are from the EPA model MOBILE6, an emission factor model 

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

Oxides (NOx), Carbon Dioxide (CO2), 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, railroads, etc.) are from the 2002 EPA 

National Emissions Inventory (NEI), grown to 2006 and 2020 by population growth from data 

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

(EPA, 2008). 

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

PM10 Maintenance Plan for Cañon City - Technical Support Document - Emission Inventory

2

2. 2006 Emission Inventory Summary

This section presents the 2006 emission inventories for the maintenance plan. 

 

Table 1. 2006 PM10 Emission Inventory (pounds per day).

Area and Mobile Sources PM-10 (Lbs/day)

Agriculture 20.2

Highway Vehicle Exhaust 22.8

Railroads 0.3

Road Dust 1237.4

Commercial Cooking 27.4

Construction 590.6

Fuel Combustion 0.8

Non-Road 33.7

Structure Fires 1.3

Woodburning 143.1

TOTAL 2078

Point Sources

site_id facility_n

0004 COLO DEPT OF CORRECTIONS - CTCF,CTA 7.8

0050 COLORADO QUARRIES INC CANON CITY YARD 19.1

0068 PORTEC INC - SOUTH PLANT 0.3

0074 HUMANE SOCIETY OF FREMONT CNTY 3.1

0141 CANON INDUSTRIAL CERAMICS, LLC 17.4

0142 THERMAL CERAMICS 23.3

TOTAL 71

Grand TOTAL 2149
Colorado Department of Public Health and Environment / Air Pollution Control Division

PM10 Maintenance Plan for Cañon City - Technical Support Document - Emission Inventory

3

3. 2020 Emission Inventory Summary

This section presents the 2020 emission inventories for the maintenance plan.

Table 2. 2020 PM10 Emission Inventory (pounds per day).

Area and Mobile Sources PM-10 (Lbs/day)

Agriculture 20.2

Highway Vehicle Exhaust 30.4

Railroads 0.3

Road Dust 1582.7

Commercial Cooking 35.1

Construction 755.4

Fuel Combustion 1.0

Non-Road 25.0

Structure Fires 1.6

Woodburning 183.1

TOTAL 2634.7

Point Sources

site_id facility_n

0004 COLO DEPT OF CORRECTIONS - CTCF,CTA 9.0

0050 COLORADO QUARRIES INC CANON CITY YARD 27.6

0068 PORTEC INC - SOUTH PLANT 0.7

0074 HUMANE SOCIETY OF FREMONT CNTY 5.6

0141 CANON INDUSTRIAL CERAMICS, LLC 25.2

0142 THERMAL CERAMICS 33.8

TOTAL 101.9

Grand TOTAL 2736.6
Colorado Department of Public Health and Environment / Air Pollution Control Division

PM10 Maintenance Plan for Cañon City - Technical Support Document - Emission Inventory

4

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/100103stationarysourcepermitting.pdf >

U.S. EPA, 2008. “2002 National Emissions Inventory Data & Documentation.”

< http://www.epa.gov/ttn/chief/net/2002inventory.html#documentation >