Instructions for Submitting Data Corrections
Introduction
EPA seeks comments on hazardous air pollutant (HAP) emissions and other model input data
that we used to assess risks from selected industrial major source categories, as required by
section 112(f) of the Clean Air Act. The source of this information is the most recent version of
EPA's National Emissions Inventory (NEI) data, updated with data collected by EPA's Office of
Air Quality Planning and Standards.
The Microsoft Access file will enable you to review and suggest revisions to HAP emissions and
other descriptive information associated with all facilities in a single regulatory category.
Instructions for using this file to review the data, revise the data, and submit revisions to EPA are
outlined below. Section 61 lists specific steps for submitting your final changes to the EPA.
Section 7 of this document defines important terms (e.g., Regulatory Code, NAICS, SCC, etc.)
and all data elements found in this file. The complete outline for this document is listed below:
1.	Application Overview
2.	View Summary Data
a.	Options
i.	Regulatory HAP Emissions
ii.	State County Regulatory Emissions
iii.	Facility Regulatory HAP Emissions
iv.	All Data
b.	Filter Data
3.	Revise Data
a.	Revise Emission Fields
b.	Revise Stack Fields
c.	Revise Process Fields
d.	Revise Emission Unit Fields
1 Underlined text in this document indicates hyperlinks to text both inside and outside the document.
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e.	Revise Facility Information
f.	Add Data to an Existing Facility
4.	Add a Facility
5.	Review Revisions
6.	Submit Revisions
7.	Term Definitions
The review file contains emissions of HAPs modeled as part of RTR.
1.	Application Overview
When this Microsoft Access file opens, you are presented with a "Main Page" containing five
buttons:
1.	View Summary Data
2.	Revise Data
3.	Review Revisions
4.	Submit Revisions
5.	Exit Database
After reading these instructions, you should select the "View Summary Data" button to view
summary data before making revisions or adding any facilities to this file. After reviewing the
current data for your regulatory category, you can proceed to the "Revise Data" forms. After
making corrections to this file, you should review your corrections and then submit your
revisions to EPA as outlined on the "Submit Revisions" form. Please note revisions made to the
data on EPA's website will not be saved. In order to make revisions that will be saved, you will
need to download the zipped file to your hard drive and extract the Access file to your hard
drive.
2.	View Summary Data
After selecting and clicking the "View Summary Data" button, the form displays national level
summary data for all pollutants associated with the regulatory category of interest. You can sort
the columns in ascending or descending order if you wish to see the highest or lowest emissions
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and/or if you want to sort by pollutant name alphabetically. This form also provides buttons that
allow you to change the aggregation level ("Options") of the data and/or filter by pollutant
("Filter Data").
a. Options - These buttons allow you to view summary data at varying levels of detail.
When you click these buttons, new forms open with data level and filter buttons
appropriate to the dataset displayed. These buttons and their accompanying forms are
as follows:
i. Regulatory HAP Emissions (View National Data Form) - As
discussed above, this form displays national level summary data for all
pollutants associated with the regulatory category of interest. This is
the default form that opens when you select "View Summary Data" on
the "Main Page."
ii. State County Regulatory Emissions (View State, County,
Regulatory, HAP, and Emissions Data Form) - All emissions for
the regulatory category are shown at the county - pollutant level. This
form would allow you, for example, to find your county and view total
emissions by pollutant from the regulatory category. After viewing
emissions at the county level, you might want to view all facilities in
the county to determine where high (or low) emissions values for a
given pollutant are originating. To do this, proceed to the Facility
Regulatory HAP Emissions data level.
iii. Facility Regulatory HAP Emissions (View Facility, Regulatory,
HAP, and Emissions Data Form) - Total emissions by pollutant for
the regulatory category at all facilities assigned to this regulatory
category. These are shown to provide a complete dataset for the
regulatory category, to help you identify additional HAPs which
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should be assigned to the regulatory category, and/or to help you
identify HAPs that should not be assigned to the regulatory category.
After viewing emissions at the facility level, you should view all data associated
with that facility to make sure that all regulated processes and emissions are
included correctly, and that latitude/longitudes, stack parameters, Source
Classification Codes (SCC), North American Industry Classification System
(NAICS) codes, and other descriptive information are correct. To view this
information, select the "All Data" button.
iv. All Data (View All Data Form) - Detailed records are shown for all
facilities included in this regulatory category. This detail includes
process level HAP emissions, SCCs, emission process group, stack
parameters, latitude/longitudes, and NAICS codes.
b. Filter Data - These buttons allow you to filter the current dataset by different
attributes. The available filters change depending upon the detail level of the
displayed data (e.g., the county level filter is not available on the national level
summary form, but is available at the State County Regulatory level). You can choose
one filter after another to progressively narrow down the data to records of interest.
For example, on the State County Regulatory Emissions level, you can filter by state
and then by pollutant. The filters available on each data level are:
•	National Data - Pollutant filter.
•	State County Regulatory Emissions - Pollutant, state, and county filters
•	Facility Regulatory HAP Emissions - Facility, pollutant, state, county,
and regulatory code filters.
•	All Data - Facility, pollutant, state, county, and regulatory code filters.
Filters can be removed by clicking the "Remove Filter(s)" Button. Clicking "Remove
Filter(s)" removes all filters applied and returns the dataset to its original form.
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After viewing emissions at the facility level, proceed to "Revise Data" on the "Main
Page" if there any omissions or errors that need correction.
3. Revise Data
When you select "Revise Data" the "Reviewer Information" form first opens. You must
complete this form before continuing. This form collects contact information on the reviewer:
•	Name
•	Organization
•	Phone Number
•	Email Address
Please note: If you suggest changes to or add emissions values you will need to provide
additional documentation for these emission revisions to the docket. (See Section 6 for more
information.)
The "Reviewer Information" form will appear every time you return to the revised data forms;
however, your contact information will be saved in the drop down list and you can readily select
your email address from the list. The "Facility Selection" form opens and allows the user to
select a facility for revision. The name of the facility and address information are shown in the
selection list as multiple facilities may have similar names. At this point, you can select one of
five actions: "Revise Data for Selected Facility," "Add a Facility," "Add Data to an Existing
Facility," "Export Facility Data to an Excel File," or "Back to Main." The "Add a Facility"
button is discussed in Section 4; the rest are described below.
Revise Data for Selected Facility - Selecting this button opens a form which allows you
to select the specific data attributes to be revised. These attributes are:
a. Revise Emissions Fields - Selecting this option brings up data fields relevant
to the emissions value. Fields that can be revised here are: start date, end date,
pollutant code, actual emissions (tons per year), allowable emissions (tons per
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year), acute emissions (tons per year), control status, and control measure
codes. If an emissions value is changed, the start date, end date, control
measure information, and emissions calculation method code must be updated
as well. For EPA to better understand current control measures that are in
operation, reviewers can indicate the type of control measure associated with
each process. You can indicate if the process is controlled in the Control
Status field, select up to five control measures from the drop-down lists, and
provide additional information in the comment field. If the control measure
information is not provided, the emission process will be considered
uncontrolled. You can also indicate that the HAP emissions value should be
deleted, and provide a reason for this deletion. Please note that you can only
enter data into the revision fields. The remaining fields are locked. When you
are finished making your changes, select "Save Records" at the bottom of the
form to save your revisions and move to another form.
Please note: If you suggest changes to or add emissions values, you will need
to provide additional documentation for these emission revisions. (See Section
6 for more information.)
b. Revise Stack Fields - Selecting this option brings up data fields relevant to
the emissions release point. Fields that can be revised here are stack height,
exit gas temperature, stack diameter, exit gas velocity, exit gas flow rate, the
emission release point type (stack vs. fugitive), fugitive length, fugitive width,
fugitive angle, latitude and longitude, fugitive 2D endpoint coordinates, and
North American Datum. You can also enter a general comment on the
revision. Please note that you can only enter data into the revision fields. The
remaining fields are locked. When you are finished making your changes,
select "Save Records." See Appendix A for additional information regarding
fugitive releases.
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c.	Revise Process Fields - Selecting this option brings up data fields relevant to
the process. Fields that can be revised here are regulatory code, SCC, days per
week, hours per day, hours per year, and weeks per year. You can also enter a
general comment on the revision. You only enter data into the revision fields.
The remaining fields are locked. When you are finished making your changes,
select "Save Records."
d.	Revise Emission Unit Fields - Selecting this option brings up data fields
relevant to the emission unit. Fields that can be revised here are emission unit
description and emission unit shutdown date. You can also enter a general
comment on the revision. You only enter data into the revision fields. The
remaining fields are locked. When you are finished making your changes,
select "Save Records."
e.	Revise Facility Information - Selecting this option brings up data fields that
describe the facility. Fields that can be revised here are: tribal code, county
name, facility registry identifier, facility category code (major or area), facility
name, location address, city, state, and zip code. You can also enter a general
comment on the revision, indicate the facility should be removed from the
regulatory category, and indicate a year closed if the facility is permanently
closed. Please note that you can only enter data into the revision fields. The
remaining fields are locked. When you are finished making your changes,
select "Save Records."
f.	No Revisions - Select this button to indicate you have reviewed the facility
data and have no revisions. You cannot select this button if you have made
revisions to the facility. After you make this selection, you will not be able to
make revisions to the facility data.
Add Data to an Existing Facility - Selecting the "Add Data to an Existing Facility"
button opens a form that shows all the current HAP emissions for the selected facility.
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You should scroll to the last row to enter any missing pollutant data. All data fields
should be filled in. When you are finished making your changes, select "Save Records."
Export Facility Data to an Excel File - Selecting this option allows you to export the
facility data to an Excel file if it facilitates your review of the original RTR facility and
emissions data. After clicking this button, you will be asked to which local directory2 you
would like to save the file. If you select this option after making revisions, your revised
records will be included.
Other Options - You also have the option of selecting a different facility, returning to the
Main Page, reviewing your changes, or preparing the file to submit your changes to EPA.
4. Add a Facility
When you select "Add a Facility" on the "Revise Data" form, a new form opens with a single
blank record. You can add a facility to this regulatory category and enter the HAP emissions and
associated descriptive facility and emission release point information. This information includes:
tribal code; county name; facility category code (major or area); facility name; location address,
city, state, and zip code; NAICS code; SCC; regulatory code; pollutant; actual emissions values;
allowable emissions values; acute emissions values; stack parameters; latitude/longitude; and
control information. The reviewer should also enter one set of appropriate identifiers: facility
registry identifier, facility identifier, unit ID, process ID, and emission release point ID. Required
fields are noted. If you add emissions for a process that is not associated with the regulatory
category, please select the appropriate regulatory code (from the drop-down list) or select
"NONE" from the drop-down list. When you are finished making your changes, select "Save
Records." To create additional emission unit, process, and HAP emissions records, now select
"Add Data to an Existing Facility" and continue with your data entry.
2 Please note: this directory should already exist on your PC. The program will not create new subdirectories.
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5.	Review Revisions
When you open the "Review Revisions" form, you can export your suggested revisions to
Microsoft Excel so that you can print and review them. This form contains five buttons:
1.	View Emissions Revisions;
2.	View Facility Revisions;
3.	Export Revisions to Excel File;
4.	Submit Revisions File; and
5.	Back to Main
After selecting option 1 or 2, the corresponding form will open which will display the selected
revisions. The Emissions Revisions form contains all additions and revisions entered under the
Revise Emissions Fields, Revise Process Fields, Revise Emission Unit Fields, and Revise Stack
Fields forms as described above. The Facility Revisions form contains all additions and revisions
entered under "Revise Facility Information" form. You can export these revisions by clicking the
"Export Revisions to Excel File" button. After clicking this button, you will be asked to which
local directory3 you would like to save the file. The selected revisions will then be exported to a
Microsoft Excel spreadsheet.
To make corrections, return to the appropriate revision form (as described under Revise Data).
Any previously revised data will appear in the revise data forms.
6.	Submit Revisions
Upon completion of all additions and corrections, or acceptance of the data with no revisions,
you need to submit your corrections to EPA. First, create a new file containing just the changes.
To do so, select the "Submit Revisions" button found on the "Main Page" and on the revision
and review summary data forms. Clicking the "Create Revisions File" button will open a form
with a button "Create Final File...". Clicking this button will create a spreadsheet file that
contains the reviewer's changes. The file will be assigned a name using the following
convention: revisions_XXXX_LastName.xls, where XXXX = regulatory code and LastName =
3 Please note: this directory should already exist on your PC. The program will not create new subdirectories.
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reviewer's last name. You will be prompted to save the new file to a local directory of your
choice. Please note, when you export the final file version to a Microsoft Excel spreadsheet, this
version will write over the review revisions version of the spreadsheet if you save them to the
same folder on your hard drive. In addition to submitting the spreadsheet file to the docket, if
you corrected or added emissions values, you should prepare supporting documentation. This can
include source test reports, permit information and/or computational information such as
emission factors and activity data (throughput). The spreadsheet and supporting documentation
must be submitted manually to one of the addresses listed in the next paragraph.
Submit your revision database, identified by Docket ID No. EPA-HQ-OAR-2018-0794, by one
of the following methods:
•	http://www.regulations.gov: Follow the on-line instructions for submitting
comments.
•	Email: A-and-R-docket@epa.gov. Include Docket ID No. EPA-HQ-OAR-2018-0794
in the subject line.
•	Mail: Environmental Protection Agency, EPA Docket Center (EPA/DC), Mailcode
28221T, Attention Docket ID No. OAR-2018-0794, 1200 Pennsylvania Avenue, NW,
Washington, DC 20460.
•	Fax: (202) 566-9744.
•	Hand/Courier Delivery: UEPA Docket Center, Room 3334, EPA WJC West Building,
1301 Constitution Ave., NW, Washington, DC 20004. Attention Docket ID No. EPA-
HQ-OAR-2018-0794. Such deliveries are only accepted during the Docket's normal
hours of operation, and special arrangements should be made for deliveries of boxed
information.
Instructions: Direct your comments to Docket ID No. EPA-HQ-OAR-2018-0794. The EPA's
policy is that all comments received will be included in the public docket without change and
may be made available online at http://www.regulations.gov, including any personal information
provided, unless the comment includes information claimed to be confidential business
information (CBI) or other information whose disclosure is restricted by statute. Do not submit
information that you consider to be CBI or otherwise protected through www.regulations.gov or
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email. The www.regulations.gov website is an "anonymous access" system, which means EPA
will not know your identity or contact information unless you provide it in the body of your
comment.
If you send an email comment directly to EPA without going through www.regulations.gov, your
email address will be automatically captured and included as part of the comment that is placed
in the public docket and made available on the Internet. If you submit an electronic comment,
EPA recommends that you include your name and other contact information in the body of your
comment and with any disk or CD-ROM you submit. If EPA cannot read your comment due to
technical difficulties and cannot contact you for clarification, EPA may not be able to consider
your comment. Electronic files should avoid the use of special characters, any form of
encryption, and be free of any defects or viruses.
For additional information about EPA's public docket visit the EPA Docket Center homepage at
http://www.epa.gov/epahome/dockets.htm. All documents in the docket are listed in the Federal
Docket Management System index at www.regulations.gov. Although listed in the index, some
information is not publicly available, i.e., CBI or other information whose disclosure is restricted
by statute. Certain other material, such as copyrighted material, is not placed on the Internet and
will be publicly available only in hard copy form. Publicly available docket materials are
available either electronically through www.regulations.gov or in hard copy at the EPA Docket
Center, EPA WJC Building, Room B-102, 1301 Constitution Avenue, NW, Washington, DC.
The Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through Friday,
excluding legal holidays. The telephone number for the Public Reading Room is (202) 566-1744,
and the telephone number for the Air and Radiation Docket is (202) 566-1742.
7. Term Definitions
The table below lists and defines all of the data elements listed in the summary and revision
forms found in the database.
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Data Element
Definition
Actual Emissions (TPY)
Numeric value of actual emissions in tons/year
Actual Emissions (TPY) Revised
Enter revised actual emissions value here
Acute Emissions (TPY)
Numeric value of acute emissions in tons/year
Acute Emissions (TPY) Revised
Enter revised acute emissions value here
Allowable Emissions (TPY)
Numeric value of allowable emissions in tons/year
Allowable Emissions (TPY) Revised
Enter revised allowable emissions value here
City
City where the regulatory facility is located
City Revised
Enter revised city name here
Control Measure
Select control measure from list provided
Control Status
Indicates whether emissions controlled (controlled,
uncontrolled, or unknown).
County Name
County name for regulatory facility
County Name Revised
Enter revised county name here
Data Source Code
Code indicating source of emissions estimate (state,
EPA, TRI, etc.).
Data Source Description
Descriptive text associated with data source code
Delete
Indicate here if the facility or record should be deleted
Delete Comment
Describes the reason for deletion
Emission Calculation Method Code For
Revised Emissions
Code description of the method used to derive actual
emissions. For example, CEM, material balance, stack
test, etc.
Emission Process Group
The general type of emissions process associated with
the specific emissions point
Emission Release Point ID
State/local/tribal ID for point/location where emissions
are released to ambient air
Emission Release Point Type
The code for physical configuration of the release
point, i.e. vertical, fugitive, etc.
Emission Release Point Type Description
Descriptive text for emission release point type code
Emission Release Point Type Revised
Enter revised emission release point type here
Emission Unit Description
A description of the emission unit
Emission Unit ID
Unique ID reported consistently over time by
state/local/tribal agency
End Date
End date of the period in which reported emissions
occur, e.g., 20081231 = December 31, 2008
End Date Revised
Enter revised end date here
EPA Region
EPA Regional code
Exit Gas Flow Rate
Numeric value of stack gas flow rate in actual cubic
feet per second
Exit Gas Flow Rate (cuft/sec) Revised
Enter revised exit gas flow rate here
Exit Gas Temperature
The temperature of an exit gas stream (degrees
Fahrenheit)
Exit Gas Temperature (F) Revised
Enter revised exit gas temperature here
Exit Gas Velocity
The velocity of an exit gas stream (feet per second)
Exit Gas Velocity (ft/sec) Revised
Enter revised exit gas velocity here
Facility Category
Code indicating if HAP emitting facility is major or
area.
Facility Category Code Revised
Enter revised facility category code here
Facility Category Desc
Definition associated with facility category code
Facility Identifier
Unique ID number used by a state/local/tribal agency
to identify a facility
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Data Element
Definition
Facility Name
The name of the facility of the regulatory facility
Facility Name Revised
Enter revised facility name here
Facility Registry Identifier
The ID number assigned by the EPA Facility Registry
System. FRS IDs can be found at:
httos://www.ei3a.eov/enviro/facilitv-reeistrv-service-
frs
Facility Registry Identifier Revised
Enter revised facility registry identifier here
FIPS
5 digit code assigned to state and county.
Fugitive 2D Endpoint 1 X Coordinate
The longitude of the midpoint of one of two opposing
sides of a fugitive source
Fugitive 2D Endpoint 1 X Coordinate Revised
Enter revised fugitive 2D endpoint coordinate here
Fugitive 2D Endpoint 1 Y Coordinate
The latitude of the midpoint of one of two opposing
sides of a fugitive source
Fugitive 2D Endpoint 1 Y Coordinate Revised
Enter revised fugitive 2D endpoint coordinate here
Fugitive 2D Endpoint 2 X Coordinate
The longitude of the midpoint of the second of two
opposing sides of a fugitive source
Fugitive 2D Endpoint 2 X Coordinate Revised
Enter revised fugitive 2D endpoint coordinate here
Fugitive 2D Endpoint 2 Y Coordinate
The latitude of the midpoint of the second of two
opposing sides of a fugitive source
Fugitive 2D Endpoint 2 Y Coordinate Revised
Enter revised fugitive 2D endpoint coordinate here
Fugitive Angle (degrees)
Release angle (clockwise from true North); orientation
of the y-dimension relative to true North, measured
positive for clockwise starting at 0 degrees (maximum
89 degrees); will assume 0 degrees if it is not provided
in data submittal
Fugitive Angle (degrees) Revised
Enter revised fugitive angle here
Fugitive Length (E-W) (ft)
Dimension of the source in the east-west (x-) direction
commonly referred to as length
Fugitive Length (E-W) (ft) Revised
Enter revised fugitive length here
Fugitive Width (N-S) (ft)
Dimension of the source in the north-south (y-)
direction, commonly referred to as width
Fugitive Width (N-S) (ft) Revised
Enter revised fugitive width here
HAP Category Name
Broader grouping to which an individual chemical
compound is assigned to by EPA. For example, "lead
and compounds" contains all pollutants containing
lead
Latitude (decimal degrees)
Latitude measure in decimal degrees of the angular
distance on a meridian north or south of the equator.
Positive (+) data point for N America. Include (+)
sign, Ex. +78.123456. For point sources this represents
the center of the source; for fugitive sources this is the
southwest corner if the fugitive angle is zero, or the
western most corner if the fugitive angle is greater
than zero
Latitude (decimal degrees) Revised
Enter revised latitude here
Location Address
Physical street address for regulatory facility
Location Address Revised
Enter revised location address here
Location Default Flag
Code that indicates source of locational coordinates.
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Data Element
Definition
Longitude (decimal degrees)
Longitude measure in decimal degrees of the angular
distance on a meridian east or west of the prime
meridian. Negative (-) data point for N America.
Include (-) sign, Ex. -123.234561. For point sources
this represents the center of the source; for fugitive
sources this is the southwest corner if the fugitive
angle is zero, or the western most corner if the fugitive
angle is greater than zero
Longitude (decimal degrees) Revised
Enter revised longitude here
NAICS Code
North American Industry Classification Code. An
industry classification system, NAICS is erected on a
production-oriented conceptual framework that groups
establishments into industries according to similarity
in the process used to produce goods or services
North American Datum
North American Datum (NAD) for longitude and
latitude coordinates (NAD27 orNAD83). If left blank
NAD83 is assumed
Pollutant Code
Code assigned by EPA to individual pollutants.
Pollutant Code Revised
Enter revised pollutant code here
Pollutant Code Desc
Descriptive text associated with pollutant code
Process ID
Unique ID reported consistently over time by
state/local/ tribal agency
Regulatory Code
Code assigned to regulated sources. Identifies one or
more similar processes that cause hazardous air
pollutant emissions that are subject to a regulatory
determination
Regulatory Code Description
Descriptive text associated with regulatory code
Regulatory Code Revised
Enter revised regulatory code here
Reviewer Email Address
Email address for person providing comments
Reviewer General Comment
A general descriptive comment on the revision
Reviewer Name
Name of person providing comments
Reviewer Organization
Reviewer's affiliation - state/local/agency, trade
association company, etc.
Reviewer Phone Number
Phone number for person providing comments
see
Source Classification Code.
SCC Description
Descriptive text associated with SCC code
SCC Revised
Enter revised SCC code here
SPPD Facility Identifier
The unique ID number used by the EPA Sector
Policies and Programs Division (SPPD) to identify a
facility
Stack Default Flag
The stack default code is a 5-digit code that indicates
if and how the stack parameters were defaulted. Each
digit represents a stack parameter in the following
order: stack height, exit gas temperature, stack
diameter, exit gas velocity, and exit gas flowrate. The
individual digits in the string indicate the source of the
defaulted parameters: 0= Original Value, 1 = SCC
Default, 2 = SIC Default, 3 = National Default, 4 =
Calculated Value, 5 = Regulatory Default, 6 = State
Revision 8 = CAMD Value. Thus, 22222 means all 5
parameters were defaulted using SIC Default List
Stack Default Flag Description
Descriptive text associated with stack default flag
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Data Element
Definition
Stack Diameter
The diameter (in feet) of a stack
Stack Diameter (ft) Revised
Enter revised stack diameter here
Stack Height
The height (in feet) of a stack
Stack Height (ft) Revised
Enter revised stack height here
Start Date
Start date of the period in which reported emissions
occur, e.g., 20080101 = January 1, 2008
Start Date Revised
Enter revised start date here
State
State where regulatory facility is located
State Abbreviation
Two-character alphabetical code for state
State County FIPs
5 digit code assigned to state and county.
State Revised
Enter revised state here

Code that represents American Indian tribes and
Tribal Code
Alaskan Native entities.
Tribal Code Revised
Enter revised tribal code here
Tribe Name
Tribal name
Year Closed
Indicate the year closed if the facility is no longer in
operation (permanently closed)
Zip Code
Zip code for the regulatory facility
Zip Code Revised
Enter revised Zip code here
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Appendix A
Fugitive Releases
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FUGITIVE SOURCE DESCRIPTION AND PARAMETER REQUIREMENTS
Fugitive Vent source (<10sqft) is a fugitive emission release from a single point. Examples include a
single roof or wall vent for building fugitives.
Required parameters are:
•	release height (ft),
•	exit gas temperature >5 OF,
•	stack diameter (default is 0.003 (ft),
•	exit gas velocity (ft/sec) (default is 0.0003 ft/sec),
•	exit gas flow rate (cu ft/sec) (default is 0 cu ft/sec) and
•	lat/lon of release
Fugitive three-dimensional source has multiple release vents, a few examples would be a building with
many wall and roof vents or an outdoor material storage pile.
Required parameters are:
•	side length (ft) [length and width are equal with three-dimensional sources]
•	lat/lon is the center of the footprint of the square and
•	height of the three-dimensional source
Figure 1. Depiction of Fugitive Three-dimensional Source Parameters
A three-dimensional shape with equal length
and width (Length = Width) and a specified
height. The lat/lon is the center of the
footprint (or bottom face of the shape.
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Fugitive two-dimensional source (>10sqft) is an emission release on one plane. For example, an
elongated roof vent or a wastewater holding pond.
Required parameters description:
Pick the midpoints of two opposing sides of the source, and enter the lat/lon of these midpoints. A width
is also required, which is the distance between the remaining two sides of the source (that is, the width is
perpendicular to the line between the two midpoints) For irregularly shaped sources, first create a
rectangle that best approximates the shape of the actual source, then determine the parameters described
above. Also, estimate the height where the release occurs.
Figure 2. Depiction of Fugitive Two-dimensional Source Parameters
Width (ft)
Midpoint 1 - Latitude and Longitude
Note: Height of
release required
Midpoint 2 - Latitude and Longitude
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Fugitive area source (>10 sqft) is an alternative way of representing a fugitive two-dimensional
source. It is an emission release on one plane. For example, an elongated roof vent or a
wastewater holding pond.
Required parameters description: Enter the coordinates of the southwest corner of the release.
The figure below shows examples of how fugitive area source rectangles are created. The red
dashed lines represent the coordinate plane with north towards the top. The purple SW points to
the southwest corner to show correct location of fugitive coordinates. The L and W represent
fugitive length and width. The rotation of each angle is also shown. You may wish to review
your coordinates and fugitive areas in a GIS program or Google Earth to verify the accuracy.
Figure 3. Depiction of Fugitive Area Source Parameters*
NORTH

Angle = O
x
Angle = -45'
Y
Angle = AS"
Angle = O"
x
*Figure created by ICF International.
3/20/2018
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Table 1. Population of Fugitive Parameters
Fugitive Parameter
Fugitive Vent
Source
Fugitive Three-
Dimensional
Source
Fugitive Two-
Dimensional
Source
Fugitive Area
Source
Fugitive Length (ft)
NA
NA - only a
single side
required
NA
Required >0
Fugitive Width (ft)
NA
Required >0
Required >0
Required >0
Fugitive Angle (Degrees)
NA
NA
NA
Required;
between 0 and
90, inclusive
Stack Diameter (ft)
0.003 (Default)
NA
NA
NA
Exit Gas Velocity (ft/sec)
0.0003 (Default)
NA
NA
NA
Exit Gas Flow Rate (cu ft/sec)
0 (Default)
NA
NA
NA
Stack Height (ft)
Required >0
Required >0;
Top of Three-
Dimensional
Source
Release height
required >0
Required >0
Exit Gas Temperature (F)
Required >50
NA
NA
NA
Latitude (decimal degrees),
Longitude (decimal degrees)
Required
Required, center
of source
footprint
Two sets of
lat/long for the
midpoints of
opposing sides
of source
(Fugitive 2D
Endpoint 1 and
Fugitive 2D
Endpoint 2)
Required,
southwest
corner of
source
Examples
Single roof
vent/opening/wind
ow for building
fugitives
Entire building
with multiple
release point on
walls and/or
roof, outdoor
storage pile
Waste water
holding pond,
building with
elongated roof
vent, haul road
Waste water
holding pond,
building with
elongated roof
vent, haul road
3/20/2018
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