Directions:

No Controls Cyclone Baghouse

Log Preparation - Bark Produced - 1 (Tons/hr) Total Y N N

Log Preparation - Chips Produced - 1 (Tons/hr) Total Y N N

Sawmill Throughput - 2.5 (Mbf/hr) Total Y N

Wood-Fired Boiler(s) Capacity - 30 (MMBtu/hr) Total Y N

Planer(s) Throughput - 2.5 (Mbf/hr) Total Y

Wood Drying Kiln(s) Throughput - 2.5 (Mbf/hr) Total * Sawmills are required to use a cyclone for control by conditions in the permit.

Natural Gas-fired Boilers and Auxiliary Heater(s) Capacity - 2 (MMBtu/hr) Total * Planer mills are required to use a baghouse for control by conditions in the permit.

Propane-fired Auxiliary Heater(s) Capacity - 2 (MMBtu/hr) Total Fuel Sulfur % 0.0015 Default = 0.0014

Distillate/Diesel-fired Auxiliary Heater(s) Capacity - 2 (MMBtu/hr) Total Fuel Sulfur % 0.0015 Default = 0.0015

Diesel-fired Emergency Generator(s) Size - 500 (hp) Total Fuel Sulfur % 0.0015 Default = 0.0015

Gasoline-fired Emergency Generator(s) Size - 250 (hp) Total

Mbf = thousand board feet

MMBtu = million British thermal units

Species

White Fir

Western Hemlock

The potential emissions of criteria pollutants and hazardous air pollutants for the facility will be displayed under the "Output" tab.

This calculator does not calculate emissions from non-emergency engines. Contact your reviewing authority if you use non-emergency engines to power your operations.

If the throughput capacity of a piece of equipment limits (or bottlenecks) the maximum throughput of other equipment, then input the bottlenecked capacity of that other equipment, 

but only if it impacts output of product.

Facility Profile

Control Technology Used (Y or N) *

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

This spreadsheet helps estimate a facility's potential to emit. It is provided for the convenience of the permitted community. Emission factor sources are subject to revision or correction. It is the 

permittee's responsibility to determine their emissions. The permittee should consult with the reviewing authority to determine the appropriateness of this calculator for its source. 

Enter the facility's information below. 

Write the letter "Y" or "N" next to each fuel type to indicate that the facility does or does not burn that type of fuel. 

If you operate multiple facilities of the same type (more than one wood-fired boiler or more than one drying kiln), enter the total rated capacity.

Enter the maximum capacity information for the equipment at your sawmill.

Wood Profile

10 Y N

% of Total Kiln Throughput Kiln Temp. < 200 oF (Y or N) Kiln Temp. > 200 oF (Y or N)

5 Y N

Page 1 of 1
PTE (ton/yr)

Process PM PM10 PM2.5 SO2 NOX CO VOC Single HAP Total HAPs

Log Preparation (de-barking, chipping) 43.80 21.90 13.14 - - - - - -

Sawmill 5.48 2.74 1.64 - - - - - -

Wood-Fired Boiler(s) 13.14 13.14 13.14 3.29 28.91 78.84 2.23 - 5.02

Wood Drying Kiln(s) - - - - - - 15 0.95 1.77

Planer(s) 0.01 0.01 0.01 - - - - - -

Natural Gas-fired Auxiliary Heater(s) 0.07 0.07 0.07 0.01 0.86 0.72 0.05 - 0.02

Propane-fired Auxiliary Heater(s) 0.07 0.07 0.07 0.00 1.24 0.72 0.10 - 0.00

Distillate/Diesel-fired Auxiliary Heater(s) 0.13 0.21 0.16 0.01 1.25 0.31 0.02 - 0.03

Diesel-fired Emergency Generator(s) 0.28 0.28 0.28 0.26 3.88 0.84 0.31 - 0.0033

Gasoline-fired Emergency Generator(s) 0.09 0.09 0.09 0.07 1.38 0.87 2.56 - -

Total PTE (ton/yr) 63.05 38.49 28.59 3.63 37.51 82.30 20.49 0.95 6.84

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Pollutant

Summary - Total Potential to Emit

Page 1 of 1
30 MMBtu/hr 1

Cyclone

Wood-fired Boiler(s)

Pollutant

Emission Factor2, 3 (lbs/MMBtu) PM4

PM10 PM2.5 SO2

No Controls 0.10 0.10 0.10 0.025

Cyclone 0.10 0.10 0.10 0.025

Baghouse 0.10 0.10 0.10 0.025

PTE (ton/yr) 13.14 13.14 13.14 3.29

Footnotes:

1. Wood-fired boilers with a capacity rating of 30 MMBtu/hr or greater are subject to federal standards under 

3. Emission factors are from AP-42, Chapter 1.6, Tables 1.6-1, 1.6-2, and 1.6-3 (updated 9/03). Assume bar

4. PM emission factors include 0.017 lb/MMBtu/hr for condensable PM.

Methodology

PTE (ton/yr) = Boiler Maximum Capacity (MMBtu/hr) x EF (lb/MMBtu) x 8760 hr x 1 ton/2000 lb

2. Emissions of PM, PM10, and PM2.5 from boilers with a maximum capacity greater than or equal to 10 MM

lb/MMBtu by conditions in the permit.

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Emissions from Wood-Fired Boilers - Criteria Pollutants and Hazardous Air Poll

Wood-fired Boiler Capacity: 

Control Technology Used: 

Page 1 of 2
Purple values are pulled from other worksheet

Blue values are results

NOX CO VOC HAPs

0.22 0.60 0.017 0.0382

0.22 0.60 0.017 0.0376

0.22 0.60 0.017 0.0367

28.91 78.84 2.23 5.02

ct to federal standards under NSPS, Subpart Dc.

 (updated 9/03). Assume bark and wet wood fired boiler.

 x 1 ton/2000 lb

eater than or equal to 10 MMBtu/hr are limited to 0.10 

wmill Facilities

and Hazardous Air Pollutants

Page 2 of 2
Natural Gas-fired Auxiliary Heater(s) Capacity - 2 (MMBtu/hr)

Propane-fired Auxiliary Heater(s) Capacity - 2 (MMBtu/hr)

Distillate/Diesel-fired Auxiliary Heater(s) Capacity - 2 (MMBtu/hr)

Worst Case PTE (ton/yr) PM PM10 PM2.5 SO2

0.26 0.34 0.29 0.02

Fuel Type: Natural Gas Used Y

Pollutant

PM PM10

2 PM2.5 SO2

Emission Factor1 (lb/MMSCF) 7.6 7.6 7.6 0.6

PTE (ton/yr) 0.07 0.07 0.07 0.01

Note:

1. Emission factors are from AP-42, Chapter 1.4, Tables 1.4-1, 1.4-2, 1.4-3, and 1.4-4 (updated 07/98).

2. Assumed PM and PM2.5 emissions are equal to PM10 emissions.

Methodology

PTE (ton/yr) = Heat Input (MMBtu/hr) x 1 MMSCF/1,020 MMBtu x EF (lb/MMSCF) x 8760 hr/yr x 1 ton/2000 lb

Fuel Type: Propane Used Y Sulfur Content:

Pollutant

PM PM10

2 PM2.5 SO2

Emission Factor1 (lbs/kgal) 0.7 0.7 0.7 0.00015

PTE (ton/yr) 0.07 0.07 0.07 0.00

Note:

1. Emission factors are from AP-42, Chapter 1.5, Tables 1.5 (updated 07/08).

2. Assumed PM and PM2.5 emissions are equal to PM10 emissions.

Methodology

PTE (ton/yr) = Heat Input (MMBtu/hr) x 1 kgal/91.5 MMBtu x EF (lb/kgal) x 8760 hr/yr x 1 ton/2000 lb

Fuel Type: Liquid Fuel Used Y Sulfur Content:

Pollutant

PM2 PM10 PM2.5 SO2

Emission Factor1 (lb/kgal) 2.0 3.3 2.55 0.213

PTE (ton/yr) 0.13 0.21 0.16 0.01

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Emissions from Auxiliary Heaters - Criteria Pollutants and Hazardous Air Pollu

Page 1 of 4
Note:

1. Emission factors are from AP-42, Chapter 1.3, Tables 1.3-1, 1.3-2, 1.3-3, 1.3-9, and 1.3-10 for Fuel Oil Combu

2. Assume PM emissions are equal to PM10 emissions

Methodology

PTE (ton/yr) = Heat Input (MMBtu/hr) x 1 kgal/140 MMBtu x EF (lb/kgal) x 8760 hr/yr x 1 ton/2000 lb

Page 2 of 4
Purple values are pulled from other worksheet

Blue values are results

NOX CO VOC HAPs

3.35 1.75 0.16 0.05

NOX CO VOC HAPs

100 84 5.5 1.89

0.86 0.72 0.05 0.02

d 1.4-4 (updated 07/98).

CF) x 8760 hr/yr x 1 ton/2000 lb

0.0015 %

NOX CO VOC HAPs

13 7.5 1.0

1.24 0.72 0.10 0.00

0 hr/yr x 1 ton/2000 lb

0.0015 %

NOX CO VOC HAPs

20 5.0 0.34 0.5537

1.25 0.31 0.02 0.03

Sawmill Facilities

ts and Hazardous Air Pollutants

Page 3 of 4
3-9, and 1.3-10 for Fuel Oil Combustion (updated 05/10).

0 hr/yr x 1 ton/2000 lb

Page 4 of 4
Log Preparation - Bark Produced - 1 (tons/hr) 

Log Prep. - Bark - Control Method - No Control

Log Preparation - Chips Produced - 1 (tons/hr) 

Log Prep. - Chips - Control Method - No Control

Log Preparation - Chipping and Bark

PM PM10 PM2.5

(lb/ton) 5.000 2.500 1.500

(lb/ton) 5.000 2.500 1.500

(lb/ton)

(lb/ton)

(lb/ton)

(lb/ton)

PTE (ton/yr) 43.80 21.90 13.14

Note:

Methodology

PTE (ton/yr) = Chip/Bark Production (ton/hr) x EF (lb/ton) x 8760 hr x 1 ton/2000 lb

3. Emission factors for baghouses are from the "Emission Factor Wood Product" prepared by Oregon Department of En

chips, Shavings, Hogged Fuel/Bark, Green Sawdust - baghouse). All PM is assumed to be PM10 and PM2.5 (Oregon). 

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

2. Emission factors for cyclones are from the "Emission Factor Wood Product" prepared by Oregon Department of Envi

chips, Shavings, Hogged Fuel/Bark, Green Sawdust - High Efficiency). PM10 is 50% of PM (Oregon) and PM2.5 is 60% 

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Emissions from Log Preparation, Debarking, Chipping - Criteria Pollut

1. Emission factors for uncontrolled log preparation are unavailable. Assume that these emissions are ten times the am

Emission factor for cyclones are from the "Emission Factor Wood Product" prepared by Oregon Department of Environm

Shavings, Hogged Fuel/Bark, Green Sawdust - High Efficiency).

Bark - Emission Factor2 (Cyclone)

Bark - Emission Factor3 (Baghouse)

Chipper - Emission Factor2 (Cyclone)

Chipper - Emission Factor3 (Baghouse)

Bark - Emission Factor1 (No Control)

Chipper - Emission Factor1 (No Control)

Page 1 of 2
Purple values are pulled from other worksheet

Blue values are results

Pollutant

SO2 NOX CO VOC

- - - -

- - - -

- - - -

- - - -

 - - - -

red by Oregon Department of Environmental Quality (Cyclone- Dry and Green 

 be PM10 and PM2.5 (Oregon). 

d by Oregon Department of Environmental Quality (Cyclone- Dry and Green 

 PM (Oregon) and PM2.5 is 60% of PM10 (AP-42). 

Sawmill Facilities

hipping - Criteria Pollutants

 emissions are ten times the amount of cyclone-controlled operations. 

y Oregon Department of Environmental Quality (Cyclone- Dry and Green chips, 

Page 2 of 2
2.5 (Mbf/hr) 

Cyclone

Planers

Pollutant

PM PM10 PM2.5 SO2

(lb/ton) 0.500 0.250 0.150 -

(lb/ton) -

PTE (ton/yr) 5.48 2.74 1.64 -

Note:

The permit requires that sawmills be controlled by a cyclone.

Methodology

PTE (ton/yr) = Chip/Bark Production (ton/hr) x EF (lb/ton) x 8760 hr x 1 ton/2000 lb

1. Emission factors for cyclones are from the "Emission Factor Wood Product" prepared by Oregon Department of Environmenta

chips, Shavings, Hogged Fuel/Bark, Green Sawdust - High Efficiency). PM10 is 50% of PM (Oregon) and PM2.5 is 60% of PM10 

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

2. Emission factors for baghouses are from the "Emission Factor Wood Product" prepared by Oregon Department of Environme

Green chips, Shavings, Hogged Fuel/Bark, Green Sawdust - baghouse). All PM is assumed to be PM10 and PM2.5 (Oregon). 

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

Sawmill Throughput -

Sawmill Control Method -

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Emissions from Sawmills - Criteria Pollutants

Sawmills - Emission Factor1 (Cyclone)

Sawmills - Emission Factor2 (Baghouse)

Page 1 of 2
Purple values are pulled from other worksheet

Blue values are results

NOX CO VOC

 - - -

 - - -

 - - -

gon Department of Environmental Quality (Cyclone- Dry and Green 

gon) and PM2.5 is 60% of PM10 (AP-42). 

regon Department of Environmental Quality (Cyclone- Dry and 

e PM10 and PM2.5 (Oregon). 

wmill Facilities

Page 2 of 2
2.5 (Mbf/hr) 

Kiln Temp. VOC Methanol

<200 0.8388 0.148

<200 0.5253 0.1484

<200 0.3631 0.1484

<200 1.1576 0.069

<200 0.1775 0.025

<200 1.1576 0.069

<200 1.5293 0.0628

<200 2.345 0.074

<200 2.8505 0.074

1. Emission factors for VOC and HAP are from "EPA Region 10 HAP and VOC Emission Factors for Lumber 

VOC Methanol

0.5 0.08

0.6 0.16

0.4 0.16

1.9 0.11

0.1 0.01

0.6 0.04

4.2 0.17

3.9 0.12

3.1 0.08

15.2 0.9

Assume kilns are direct-fired (heat for kilns is from wood-fired boilers or auxiliary heaters). Any particulate, S

Methodology

PTE (ton/yr) = Kiln Throughput (mbf/hr) x Emission Factor (lb/mbf) x 8760 hr/yr x 1 ton/2000 lbs

Potential To Emit Calculator for Sawmill Faci

7/2/2014

Emissions from Kiln Drying - Criteria Pollutants and Hazardous A

Wood Profile for Kiln Activity

Kiln Throughput (Mbf/hr) 

(Yearly Basis)

0.3

Species

Western White Pine

Ponderosa Pine

Lodgepole Pine

Larch

Engelmann Spruce

Douglas Fir

Western Red Cedar

Western hemlock

White Fir

0.6

0.4

White Fir

Western hemlock

Western Red Cedar

Douglas Fir

Total

Species

Wood Drying Kiln(s) Throughput -

PTE (tons/yr) Engelmann Spruce

Larch

Lodgepole Pine

Ponderosa Pine

Western White Pine

0.1

0.1

0.3

0.4

0.1

0.3

Page 1 of 3
Purple values are pulled from other worksheet

Blue values are results

Formaldehyde Acetaldehyde Propionaldehyde Acrolein Total HAP

0.0034 0.055 0.0018 0.0026 0.2107

0.0016 0.1378 0.0018 0.0026 0.2921

0.0034 0.1378 0.0018 0.0026 0.2939

0.0019 0.0682 0.0007 0.0011 0.1409

0.0013 0.036 0.0007 0.001 0.064

0.0019 0.0682 0.0007 0.0011 0.1409

0.0041 0.042 0.0032 0.0045 0.1166

0.0034 0.042 0.0032 0.0045 0.1271

0.0034 0.042 0.0032 0.0045 0.1271

VOC Emission Factors for Lumber Drying, December 2012".

Formaldehyde Acetaldehyde Propionaldehyde Acrolein Total HAP

0.00 0.03 0.00 0.00 0.12

0.00 0.15 0.00 0.00 0.3

0.00 0.15 0.00 0.00 0.3

0.00 0.11 0.00 0.00 0.23

0.00 0.02 0.00 0.00 0.04

0.00 0.04 0.00 0.00 0.08

0.01 0.11 0.01 0.01 0.3

0.01 0.07 0.01 0.01 0.21

0.00 0.05 0.00 0.00 0.14

0.03 0.7 0.02 0.03 1.8

uxiliary heaters). Any particulate, SO2, NOx, and CO emissions are from combustion at the source of the heat.

 hr/yr x 1 ton/2000 lbs

ator for Sawmill Facilities

ollutants and Hazardous Air Pollutants

Emission Factors1 (lb/Mbf)

Pollutant

Page 2 of 3
 source of the heat.

Page 3 of 3
2.5 (Mbf/hr) 

Baghouse

Planers

PM PM10 PM2.5

(lb/ton) 0.001 0.001 0.001

PTE (ton/yr) 0.01 0.01 0.01

Note:

The permit requires that planer mills be controlled by a baghouse.

Methodology

PTE (ton/yr) = Chip/Bark Production (ton/hr) x EF (lb/ton) x 8760 hr x 1 ton/2000 lb

Planer(s) Throughput -

Planer(s) Control Method -

1. Emission factors for cyclones are from the "Emission Factor Wood Product" prepared by Oregon Department of Envi

chips, Shavings, Hogged Fuel/Bark, Green Sawdust - High Efficiency). PM10 is 50% of PM (Oregon) and PM2.5 is 60% 

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

2. Emission factors for baghouses are from the "Emission Factor Wood Product" prepared by Oregon Department of En

Green chips, Shavings, Hogged Fuel/Bark, Green Sawdust - baghouse). All PM is assumed to be PM10 and PM2.5 (Or

http://www.georgiaair.org/airpermit/downloads/permits/10300004/psd20735/1030004appl.pdf 

Potential To Emit Calculator for Sawmill Facilities

7/2/2014

Emissions from Planing - Criteria Pollutants

Planers - Emission Factor2 (Baghouse)

Page 1 of 2
Purple values are pulled from other worksheet

Blue values are results

Pollutant

SO2 NOX CO VOC

 - - - -

 - - - -

ed by Oregon Department of Environmental Quality (Cyclone- Dry and Green 

of PM (Oregon) and PM2.5 is 60% of PM10 (AP-42). 

ared by Oregon Department of Environmental Quality (Cyclone- Dry and 

sumed to be PM10 and PM2.5 (Oregon). 

 Sawmill Facilities

ria Pollutants

Page 2 of 2
500 hp

250 hp

Worst Case PTE (ton/yr) PM PM10 PM2.5 SO2

0.37 0.37 0.37 0.33

Engine Type: Diesel Engine (<= 600 hp) Used: Yes

Pollutant

PM2 PM10 PM2.5

2 SO2

Emission Factor1 (lbs/hp-hr) 2.20E-03 2.20E-03 2.20E-03 2.05E-03

PTE (ton/yr) 0.28 0.28 0.28 0.26

Note:

1. Emission factors are from AP-42, Chapter 3.3, Tables 3.3-1 and 3.3-2 (updated 10/96).

2. Assume PM and PM2.5 emissions are equal to PM10 emissions.

3. Assume TOC (total organic compounds) emissions equal to VOC emissions.

4. Assume 500 hours/yr of operation for an emergency engine

Methodology

PTE (ton/yr) = Engine Capacity (hp) x EF (lb/hp-hr) x 500 hr x 1 ton/2000 lb

Engine Type: Diesel (> 600 hp) Used: No Sulfur Content:

Pollutant

PM PM10 PM2.5

2 SO2

Emission Factor1 (lbs/hp-hr) 0.0007 0.0007 0.0007 1.21E-05

Limited PTE (ton/yr) 0.00 0.00 0.00 0.00

Note:

1. Emission factors are from AP-42, Chapter 3.4, Tables 3.4-1 and 3.4-2 for Large Stationary Diesel and Dual Fue

2. Assume PM2.5 emissions are equal to PM10 emissions.

3. Assume TOC (total organic compounds) emissions equal to VOC emissions.

4. Assume 500 hours/yr of operation for an emergency engine

Methodology

PTE (ton/yr) = Engine Capacity (hp) x EF (lb/hp-hr) x 500 hr x 1 ton/2000 lb

Engine Type: Gasoline Used: Yes

Pollutant

PM PM10 PM2.5

2 SO2

Emission Factor1 (lbs/hp-hr) 7.21E-04 7.21E-04 7.21E-04 5.91E-04

Limited PTE (ton/yr) 0.09 0.09 0.09 0.07

7/2/2014

Potential To Emit Calculator for Sawmill Facilities

Emissions from Emergency Generator Engines - Criteria Pollutants and Hazardous A

Diesel-fired Emergency Generator Engine Size:

Gasoline-fired Emergency Generator Engine Size:

Page 1 of 4
Note:

1. Emission factors are from AP-42, Chapter 3.3, Table 3.3-1 for Uncontrolled gasoline and Diesel Industrial Engin

2. Assume PM and PM2.5 emissions are equal to PM10 emissions.

3. Assume TOC (total organic compounds) emissions equal to VOC emissions.

4. Assume 500 hours/yr of operation for an emergency engine

Methodology

PTE (ton/yr) = Engine Capacity (hp) x EF (lb/hp-hr) x 500 hr x 1 ton/2000 lb

Page 2 of 4
Purple values are pulled from other worksheet

Blue values are results

NOX CO VOC HAPs

5.25 1.71 2.87 0.0033

NOX CO VOC3 HAPs

3.10E-02 6.68E-03 2.47E-03 2.65328E-05

3.88 0.84 0.31 0.0033

0.0015 %

NOX CO VOC3

HAPs

0.024 5.50E-03 7.05E-04 2.99739E-05

0.00 0.00 0.00 0.0000

 Stationary Diesel and Dual Fuel Engines (updated 10/96).

NOX CO VOC3

0.011 6.96E-03 2.05E-02

1.38 0.87 2.56

wmill Facilities

ants and Hazardous Air Pollutants

Page 3 of 4
oline and Diesel Industrial Engines (updated 10/96).

Page 4 of 4