01/31/11 1 

### 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 i ndustrial major source cate gories, as required by section 112(f) of the Clean Air Act. The source of this information is the most recent version of the 2005 National Emissions Inventory (2005 NEI), updated with data collected by EPA’s Office of Air Quality Planning and Standards. For more information about the 2005 National Emissions Inventory (NEI), please go to: http://www.epa.gov/ttn/chief /net/2005inventory.html. 1

The Microsoft Access file will enable you to review and suggest revisions to HAP emissions and other descriptive information a ssociated with all facilities in a single Maximum Achievable Control Technology (MACT) category. In structions for using this file to review the data, revise the data, and submit revisions to EPA are outlined below. Section 6 lists specific steps for submitting your final changes to the EPA. Section 7 of this document defines important terms (e.g., MACT, SIC, SCC, etc.) and all data elemen ts found in this file. The complete outline for
this document is listed below:
1. Application Overview
2. View Summary Data

a. Options
i. MACT HAP Emissions
ii. State County MACT Emissions
iii. Facility MACT HAP Emissions
iv. All Data
b. Filter Data
3. Revise Data

a. Revise Emission Fields
b. Revise Stack Fields

1 Underlined text in this document indicates hyperlinks to text both inside and outside the document.01/31/11 2 c. Revise Process Fields
d. Revise Facility Information

e. Add Data to an Existing Facility
4. Add a Facility
5. Review Revisions
6. Submit Revisions
7. Term Definitions

Please note that the category- specific files contain all emissions data for the facilities identified as belonging to a MACT category. Thus, some of the emissions may be from processes NOT associated with the MACT category of interest. The column labeled “MACT Code” indicates if the HAP pollutant emissions are associated with the MACT category of interest or another MACT category at the facility. For example, if the MACT code is labeled 0107-2, the emissions are described as being associated with “Industr ial/Commercial/Institution al Boilers & Process Heaters – gas.” These are shown to provide a comple te dataset for the facility and/or to help the reviewer spot additional processes which should be assigned to the MACT category.

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 a ny facilities to this file. After reviewing the current data for your MACT category, you can proceed to the “Revis e Data” forms. After making corrections to this file, you should re view your corrections and then submit your
revisions to EPA as outlined on the “Submit Revisions” form.01/31/11 3 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 MACT category of inte rest. You can sort the columns in ascending or descending order if you wi sh to see the highest or lowest emissions and/or if you want to sort by pol lutant name alphabetically. This form also provides buttons that allow you to change the aggrega tion level (“Options”) of the da ta and/or filter by pollutant (“Filter Data”).

a. Options – These buttons allow you to view summar y 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. Thes e buttons and their accompanying forms are
as follows:

i. MACT HAP Emissions (View National Data Form) – Discussed above, this form displays national level summary data for all pollutants associated with the MACT category of interest. This is the default form that opens when you select “View Summary Data” on the “Main Page.”

ii. State County MACT Emissions (View State, County, MACT, HAP, and Emissions Data Form) – All emissions for the MACT category are shown at the county – po llutant level. This form would allow you, for example, to find your county and view total emissions by pollutant from the MACT categor y. 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 MACT HAP
Emissions data level.

iii. Facility MACT HAP Emissions (View Facility, MACT, HAP, and Emissions Data Form) – Total emissions by pollutant are shown for01/31/11 4 all processes at all facilities assi gned to this MACT category. The column labeled “MACT Code” indicates if the HAP pollutant
emissions are associated with th e MACT category or another MACT category at the facility. For exampl e, if the MACT code is labeled 0107-2, the emissions are describe d as being associated with
“Industrial/Commercial/ Institutiona l Boilers & Process Heaters – gas.” These are shown to provide a complete dataset for the facility and/or to help you spot additional processes which should be assigned to the MACT category.

After viewing emissions at the facility level, you might want to view all data associated with that facility to make sure that latitude/longitudes, stack parameters, Source Classification Codes (S CC), Standard Industrial Classification (SIC) codes, North American Industry Cl assification 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 MACT cat egory. This detail includes process level HAP emissions, SCCs, stack parameters, latitude/longitudes and
address information.

b. Filter Data – These buttons allow you to filter the current dataset by different
attributes. The available filters chan ge 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 MACT level). You can choose one filter after another to progressively narrow down the data to records of interest. For example, on the State County MACT Emi ssions level, you can filter by state and then by pollutant. The filters available on each data level are:01/31/11 5  National Data – Pollutant filter.

 State County MACT Emissions – Pollutant, state, and county filters.

 Facility MACT HAP Emissions – Faci lity, pollutant, state, county, and
MACT code filters.

 All Data – Facility, pollutant, stat e, county, and MACT code filters.

Filters can be removed by clicking the “Remove Filter” Button. Clicking “Remove Filter” removes all filters applied and returns the dataset to its original form.

After viewing emissions at the facility le vel, proceed to “Revise Data” on the “Main Page” if there any omissions or errors that ne ed correction.

3. Revise Data When you select “Revise Data” the “Reviewer Information” form first opens. You must complete this form before continuing. This fo rm collects contact info rmation 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 revi sions to the docket. (See Section 6 for more information.)

The “Reviewer Information” form will appear ever y 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 Se lection” form opens and allows the user to select a facility for revision. The name of the f acility 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 Facilit y,” “Add a Facility,” “Add Data to an Existing01/31/11 6 Facility,” “Export Facility Data to an Excel Fi le,” or “Back to Main.” The “Add a Facility” button is discussed in Section 4; the rest are described below.

Revise Data for Selected Faci lity – Selecting this button ope ns a form which allows you to select the specific data attributes to be revise d. These attributes are:

a. Revise Emissions Fields – Selecting this option bri ngs up data fields relevant
to the emissions value. Fields that can be revised here are: start date, end date, routine emissions (tons per year), pollu tant code, and HAP performance level. If an emissions value is changed, the start date, end date, HAP performance level, control measure information, a nd emissions calculation method code must be updated as well. Because EPA is modeling both short- and long-term risks, you are also asked to indicate the routine emissions maximum hourly rate (in lbs per hour), as well as st artup, shutdown, and malfunction (SSM) annual and maximum hourly emissions (a nd use the comment field to indicate number of SSM occurrences). For EP A to better understand current control measures that are in operation, we are requesting that reviewers indicate the type of control measure associated with each unit. You can indicate if the process is controlled (check box for Ye s), select a control measure from the drop down list, and provide additional info rmation in the comment field. If the control measure information is not pr ovided, the emission process will be
considered uncontrolled. You can also i ndicate 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 fi elds. The remaining fields are locked. When you are finished making your change s, select “Save Records” at the bottom of the form to save your revi sions 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.)01/31/11 7 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, stack diameter, stack temperature, exit gas velocity, exit gas flow rate, the emission release point type (stack vs. fugitive), fugitive length, fugitive width

, fugitive angle

, latitude and longitude, and No rth American Datum. You can also enter a general comment on the revision. Please note that you can only
enter data into the revision fields. Th e remaining fields are locked. When you are finished making your changes, select “Save Records.”

c. Revise Process Fields – Selecting this option brings up data fields relevant to the process. Fields that can be revi sed here are MACT code and SCC. 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 Facility Information – Selecting this option bri ngs 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 that th e facility should be removed from the NEI if it has permanently closed and when it closed, or indicate the facility
should be removed from the MACT cat egory. Please note that you can only
enter data into the revisi on fields. The remaining fields are locked. When you are finished making your changes, select “Save Records.”

e. 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.01/31/11 8 Add Data to an Existing Facility – Select ing the “Add Data to an Existing Facility” button opens a form which shows all the curren t HAP emissions for the selected facility.
You should scroll to the last row to enter any missing pollutant data. All data fields should be filled in. In addition to providi ng additional annual emission estimates, you are
also asked to indicate the routine emissions maximum hourly rate (in lbs per hour), as well as startup, shutdown, and malfunc tion (SSM) annual and maximum hourly emissions (and use the comment field to indi cate number of SSM occurrences). You can select “RTR11,” Risk and Technology Revi ew 2011 as the data source. When you are finished making your changes, select “Save Records.”

Export Facility Data to an Excel File – Se lecting this option allows you to export the facility data to an Excel file if it facilitates your review of the original NEI facility and emissions data. After clicking this button, you will be asked to which local directory 2 you would like to save the file. If you select th is option after making revisions, your revised
records will be included.

Other Options – You also have the option of se lecting a different facility, returning to the Main Page, reviewing your cha nges, or preparing the file to submit your changes to EPA.

2 Please note: this directory should already exist on yo ur PC. The program will not create new subdirectories.01/31/11 9 4. Add a Facility When you select “Add a Facility” on the “Revis e Data” form button a new form opens with a single blank record. You can add a facility to this MACT cate gory and enter the HAP emissions and associated descriptive facility and emissi on 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; SIC code; NAI CS code; SCC; MACT c ode; pollutant; routine, startup, shutdown, and malfunction (SSM) emissions values and rates (and number of SSM occurrences); stack parameters; a nd latitude/longitude. Th e reviewer should al so enter one set of appropriate identifiers: facility registry identifi er, 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 MACT category, please select the appropriate MA CT code (from the drop down list) or indicate that it is not a MACT-associated process. 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.

5. Review Revisions When you open the “Review Revisions” form, y ou can export your suggested revisions to Microsoft Excel so that you can print and revi ew them. This form contains five buttons:

1. View Emissions Revisions; 2. View Facility Revisions; 3. Export Revisions to Excel File; 4. Submit Revisions; and
5. Back to Main

After selecting options 1 or 2, the corresponding fo rm 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 , and Revise Stack Fields forms as described above. The Facility Revisions form contains all additions and revi sions entered under “ Revise Facility Information ” form. You can export these revisions by clicking the “Export Revisions to01/31/11 10 Excel file” button. After clicking this button, you will be asked to which local directory 3 you would like to save the file. The selected revisi ons will then be exporte d to a Microsoft Excel spreadsheet.

You should print out these spreadsheets, review them, and make corrections as necessary. To make corrections, return to the approp riate 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” butt on found on the “Main Page” and on the revision and review summary data forms. Clicking the “Create Revisions File” button will create a spreadsheet file that contains the reviewer’s ch anges. The file will be assigned a name using the following convention: XXXX_Revisions_LastName .xls, where XXXX = 4-6 digit MACT code
and LastName = reviewer’s last name. You will be prompted to save the new file to a local directory of your choice. In addition to submittin g the spreadsheet file to the docket, if you corrected or added emissions values, you shoul d prepare supporting do cumentation. This can include source test reports, permit informati on and/or computational information such as emission factors and activity data (throughput). The spreadsheet and s upporting 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-2004-0305, by one of the following methods:

 http://www.regulations.gov : Follow the on-line instructions for submitting

comments.

 E-mail: a-and-r-docket@epamail.epa.gov . Attention Docket ID No. EPA-HQOAR-2004-0305.

 Mail: U.S. Postal Service, send comments to: EPA Docket Center, EPA West (Air Docket) Attention Docket ID No. EPA-HQ-OAR-2004-0305, U.S. Environmental

3 Please note: this directory should already exist on yo ur PC. The program will not create new subdirectories.01/31/11 11 Protection Agency, Mailcode 2822T, 1200 Pennsylvania Avenue, NW, Washington, DC 20460. Please include a total of two copies.

 Hand Delivery: U.S. Environmental Protec tion Agency, EPA West (Air Docket), Room 3334, 1301 Constitution Ave., NW, Wa shington, DC 20004. Attention Docket ID No. EPA-HQ-OAR-2004-0305. Such deliver ies are only accepted during the Docket’s normal hours of operation, and sp ecial arrangements should be made for
deliveries of boxed information.

Instructions : Direct your comments to Docket ID No. EPA-HQ-OAR-2004-0305. The EPA’s policy is that all comments received will be in cluded 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 informa tion claimed to be confidential business information (CBI) or other information whose disclo sure is restricted by st atute. Do not submit information that you consider to be CBI or otherwise protected through www.regulations.gov or e-mail. The www.regulations.gov website is an “anonymous access” system, which means EPA will not know your identity or contact inform ation unless you provide it in the body of your

comment.

If you send an e-mail comment directly to EPA without going through www.regulations.gov, your e-mail address will be automati cally 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 dock et visit the EPA Docket Center homepage at http://www.epa.gov/epahome/dockets.htm. All documen ts in the docket are listed in the Federal Docket Management System index at www.regul ations.gov. Although listed in the index, some information is not publicly availabl e, i.e., CBI or other information whose disclosure is restricted01/31/11 12 by statute. Certain other material , such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy fo rm. Publicly available docket materials are available either electronically through www.re gulations.gov or in hard copy at the Air and Radiation Docket, EPA/DC, EPA West Buildi ng, 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 ho lidays. The telephone number for the Public Reading Room is (202) 566-1744, and the telephone number for th e Air and Radiation Do cket is (202) 566-1742.

7. Term Definitions
The table below lists and defines all of the da ta elements listed in the summary and revision
forms found in the database.

Data Element Definition City City where the MACT facility is located Commenter Email Address Email address for person providing comments Commenter General Comment A general descriptive comment on the revision Commenter Name Name of person providing comments

Commenter Organization Commenter's affiliation - state/local/agency, trade association, company, etc. Commenter Phone Number Phone number for person providing comments Control Measure In Place Are control measures in place? (Yes or No)

Control Measure Select control measure from list provided, and briefly describe the control measure County Name County name for MACT facility Data Source Description Descriptive te xt associated with data source code

Data Source Code Code indicating source of emissions estimate (state, EPA, TRI, etc.). All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

. 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 emissions. For example, CEM, material balance, stack test, etc.

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 conf iguration of the release point, i.e. vertical, fugitive, etc. Emission Release Point Type Description Descriptive text for EmissionReleasePointType code
Emission Type Code describing temporal designation of emissions reported, i.e., entire period, average weekday, etc.

Emission Unit ID Unique ID reported consistently over time by state/local/tribal agency Emissions (TPY) Numeric value of routine emissions in tons/year01/31/11 13 Data Element Definition

End Date End date of the period in which reported emissions occur, e.g., 20051231 = December 31, 2005

EPA Region EPA Regional Code. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

.

Exit Gas Flow Rate Numeric value of stack gas flow rate in actual cubic feet per second

Exit Gas Temperature The temperature of an exit gas stream (degree Fahrenheit) Exit Gas Velocity The velocity of an exit gas stream (feet per second) Facility Category Desc Definition asso ciated with Facility Category Code

Facility Category Code indicating if HAP emitting facility is major or area. All codes are define d in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

. Facility Name The name of the facility of the MACT facility

Facility Registry Identifier The ID number assigned by the EPA Facility Registry System. FRS IDs can be found at: http://www.epa.gov/enviro/html/facility.html

.

FIPS 5 digit code assigned to state and county. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

. Fugitive Width (N-S) (ft) Dimension of the source in the north-south (y-) direction, commonly referred to as width

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 Length (E-W) (ft) Dimension of the source in the east-west (x-) direction, commonly referred to as length

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.

HAP Emissions Performance Level Code that represents the performance level, or operating scenario, for the HAP emissions reported. Actual, allowable, maximum and potential. HAP Emissions Performance Level Description Descriptive text associat ed with code for HAP Performance Level

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. Location Address Physical str eet address for MACT facility

Location Default Flag Code that indicates source of locational coordinates. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

. For example, SITEAVG indicates site average.01/31/11 14 Data Element Definition

Longitude (decimal degrees) Longitude measure in decima l 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.

MACT Code Code assigned to Maximum Achievable Control Technology regulated sources. Identifies one or more similar processes that ca use hazardous air pollutant emissions that are subject to a MACT determination. MACT Source Category Descriptive text associated with MACT code

MACT Compliance Status Describes Major/Area classification and status under CAAA Sections 112&129. Codes and definitions are as follows: 01 – Major Source (>10/25 tpy), compliance date has not yet occurred. 02 – Major Source (>10/25 tpy), compliance date has occurred. 03 – Area Source (<10/25tpy) category listed in, and subject to, Section 112 &129 standards. 04 – Area Source (<10/25tpy) category listed in, but not subject to, Section 112 &129 standards as a synthetic minor. 05 – Area Source (<10/25tpy) category listed in, but not subject to, Section 112 &1 29 standards as true area or natural minor source. 06 – Rule only affects major sources; area may be flagged. 07 – Rule only covers certain HAPs; all HAPs flagged.

MACT flag Describes how MACT Code was assigned. Codes are as follows: - EFIG-BASED – MACT Code assigned by U.S. EPA Emission Factor and Inventory Group (emissions data provided by various sources); - ESD-BASED – MACT Code assigned by U.S. EPA Emission Standards Division (ESD) (emissions data usually provided by ESD); - FACILLIST-* MACT code assigned to facilities listed on MACT category lists compiled by EPA (emissions data provided by various sources); - NAICS-DEFAULT – MACT Code assigned based on NAICS code; - SCC-DEFAULT – MACT Code assigned based on SCC; - SIC-DEFAULT – MACT Code assigned based on SIC code; - STATE-BASED – MACT Code assigned by state agency. Malfunction Emissions (TPY) Emissions that occurred during periods of malfunction. Malfunction Emissions Max Hourly Rate (lbs per hour) Maximum hourly emission rate for emissions that occurred during periods of malfunction.01/31/11 15 Data Element Definition

NAICS Code North American Industry Classification Code. An industry classification system, NAICS is erected on a production-oriented conceptual framework that groups establishments into industri es according to similarity in the process used to produce goods or services. NEI Site ID Unique identifier assigned by EPA to NEI Facility

North American Datum North American Datum (NAD) for longitude and latitude coordinates (NAD27 or NAD83). If left blank NAD83 is assumed. Pollutant_Code_Desc Descriptive text associated with pollutant code

Pollutant Code Code assigned by EPA to individual pollutants. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

.
Process ID Unique ID reported consistently over time by state/local/ tribal agency REVISED City Enter revi sed city name here REVISED County Name Enter revised county name here REVISED Emission Release Point Type Enter revised EmissionReleasePointType here REVISED Emissions (TPY) Enter revised routine emissions value here REVISED End Date Enter revised End Date here REVISED Exit Gas Flow Rate (cuft/sec) Enter revised Exit Gas Flowrate here REVISED Exit Gas Temperature (F) Enter revised Exit Gas Temperature here REVISED Exit Gas Velocity (ft/sec) En ter revised Exit Gas Velocity here REVISED Facility Category Code Enter revised Facility Category Code here REVISED Facility Name Enter revised Facility Name here REVISED Facility Registry Identifier Enter revised Facility Registry Identifier here REVISED HAP Emissions Performance Level Enter revised HAP Emissions Performance Level here REVISED Latitude (decimal degrees) Enter revised Latitude here REVISED Location Address Enter revised Location Address here REVISED Longitude (decimal degrees) Enter revised Longitude here REVISED MACT Code Enter revised MACT Code here REVISED Pollutant Code Enter revised Pollutant Code here REVISED SCC Enter revised SCC Code here REVISED Stack Diameter (ft) Enter revised Stack Diameter here REVISED Stack Height (ft) Enter revised Stack Height here REVISED Start Date Enter revised Start Date here REVISED State Enter revised State here REVISED Tribal Code Enter revised Tribal Code here REVISED Zip Code Enter revised Zip Code here Routine Emissions Max Hourly Rate (lbs per hour) Maximum hourly emission rate for routine emissions.

SCC Source Classification Code. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

. SCC Description Descriptive text associated with SCC code

SIC Code Standard Industrial Classification code. The Standard Industrial Classification (abbreviated 'SIC') was a United States government system for classifying industries by a four-digit code. Established in the 1930s, it is being supplanted by the six-digit NAICS01/31/11 16 Data Element Definition SIC Code Description Descriptive text associated with SIC Code

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 = MACT Default, 6 = State Revision, 8 = CAMD Value. Thus, 22222 means all 5 parameters were defaulted using SIC Default List. Stack Default Flag Description Descriptiv e text associated with StackDefaultFlag Stack Diameter The diameter (in feet) of a stack Stack Height The height (in feet) of a stack

Start Date Start date of the period in which reported emissions occur, e.g., 20050101 = January 1, 2005 Startup Emissions (TPY) Emissions that occurred during startup periods. Startup Emissions Max Hourly Rate (lbs per hour) Maximum hourly emission ra te for startup period emissions. State State where MACT facility is located State Abbreviation Two-character alphabetical code for state

State County FIPs 5 digit code assigned to state and county. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html

State Facility Identifier Unique ID number used by a state/local/tribal agency to identify a facility

Shutdown Emissions (TPY) Emissions that occurred during shutdown periods. Shutdown Emissions Max Hourly Rate (lbs per hour) Maximum hourly emission rate for shutdown period emissions.

Tribal Code Code that represent American Indian tribes and Alaskan Native entities. All codes are defined in lookup tables at http://www.epa.gov/ttn/chief/net/2005inventory.html 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 MACT facility