Instructions and Help Documents

Emissions Inventory General Instructions

Gives a complete overview of what is required for Oklahoma emissions inventories, including descriptions of the individual data fields that need to be filled out in the Turn Around Document.

Redbud Help

Contains specific instructions and advice (including screen grabs) for using the DEQ web-based application, Redbud, to submit emissions inventories electronically.

Emissions Inventory Frequently Asked Questions (FAQs)

These are different examples of the questions we receive throughout the year, and your questions may be quickly answered here.

However, if you have a specific question about a particular set of circumstances at your facility, then we strongly recommend that you contact us. Of course, with any question or in any situation, the Air Quality Rules always apply and must always be adhered to. Subchapter 5 of OAC 252:100 ("Registration, Emission Inventory and Annual Operating Fees") is the main part of these rules that directly govern the submitting of Emissions Inventories.

Emissions Inventory Reference Tables and Resources

Applicable Regulations

Federal and State regulations that may be applicable to particular processes.

Control Descriptions

Types of control equipment used to reduce emissions from a process.

Designation of Responsible Official Form  (MS Word)  (PDF)

Emission Unit Types

General categories and groups of emission unit types

MACT Descriptions and Codes

This table contains MACT (Maximum Achievable Control Technology) codes and descriptions of sources, as designated in sections 112 & 129 of the Federal Clean Air Act.

A list of materials used that created the pollutants at each process. If a particular material is not mentioned here then please contact the Emissions Inventory Section.

Lists all the methods currently approved by DEQ for calculating emissions.

Lists all of the North American Industry Classification System codes and descriptions.

This web page details all pollutants currently regulated in Oklahoma by State or Federal rule or regulation. Emissions of any of these pollutants must be reported as part of an emissions inventory, not just of pollutants that are specifically limited in a facility's permit.

SCC Table

The most current version of this table containing the latest Source Classification Codes accepted by EPA is the SSC_List and is available for download.

SCC 3-digit Point Source Categories

This table can be very helpful for identifying the broad category that your process falls into and thus help you focus your search for the exact SSC code for the process.

Unit Names

A list of units used to measure a process rate. These units will also be the denominator of the emission factor used to calculate emissions from a process. For example, for a natural gas boiler the process rate is measured in million standard cubic feet and the emission factor would be lbs/million standard cubic feet.

Blank Turn Around Document Forms

These forms are available in the Adobe^® Portable Document Format (PDF).
 
If an emissions inventory for your facility was previously reported and you have elected to follow the hardcopy option for reporting emissions, then on the first working day of the year or immediately thereafter, DEQ will send you a Turn Around Document by mail or email. This will be pre-populated with most of the information about your facility. You will then need to update other key information, such as process rates and amount of pollutants emitted from your operations in the reporting year. However, if you are reporting a new emission unit and/or process, you will need to use the Blank Emission Unit Page and you may have to use the Blank Additional Pollutants Page (if you are reporting more than two pollutants from a process).

Blank Facility Main Page

Adobe Portable Document Format (.pdf)

Blank Emission Unit Page

.pdf

Blank Additional Pollutants Page

.pdf

Blank Certification Page

.pdf

Useful External Emissions Inventory Links

AP-42: www.epa.gov/ttn/chief/ap42/index.html

AP-42 refers to the EPA’s Compilation of Air Pollutant Emission Factors, a series of representative values that attempt to relate the quantity of a pollutant released to the atmosphere from a particular activity. These factors are typically expressed as the weight of pollutant divided by a unit weight, volume, distance, or duration of the activity emitting the pollutant (e.g., lbs of carbon dioxide emitted per million standard cubic feet of natural gas burned). In most cases, emission factors in AP-42 are simply averages of all available data of acceptable quality, and are generally assumed to be representative of long-term averages for all facilities in the source category (i.e., a population average). AP-42 also gives an indication of the quality of these emission factors.

CHIEF: www.epa.gov/ttn/chief

EPA's Clearinghouse for Inventories & Emissions Factors (CHIEF) is an excellent resource for all aspects of emissions inventories.

Dunn & Bradstreet: www.dnb.com/us

Find out here about the DUNS number (Data Universal Numbering System) assigned to a facility in the Dunn & Bradstreet Business Database.

FIRE: www.epa.gov/ttn/chief/software/fire

The Factor Information REtrieval (FIRE) Data System is a database containing EPA's emission estimation factors for criteria and hazardous air pollutants in an easy to use Microsoft Windows program.

NAICS <-> SIC: www.census.gov/epcd/www/naicstab.htm

This page has valid conversion tables between Standard Industry Classification (SIC) and North American Industrial Classification System (NAICS) codes .

ORIS ID: www.eia.doe.gov

The Energy Information Agency (EIA) of the US Department of Energy assigns a 4-digit ORIS (Office of the Regulatory Information System) identifier to electricity generating units (i.e., primarily facilities with a SIC code of 4911). This code is reported by industry on DOE EIA forms.

SIC: www.osha.gov/pls/imis/sicsearch.html

Use this page to determine a Standard Industrial Classification code for a facility.