Pollutant Specific Information Pages-Explanation of Table Fields

This web page supplies information on the particular air contaminant in a series of tables listed from top to bottom on the web page.

Chemical and Use Information Table

This table supplies information specific to the pollutant.

  1. Chemical Abstract Symbol (CAS)-CAS Registry Numbers (often referred to as CAS RNs or CAS Numbers) are unique identifiers for chemical substances. A Registry Number itself has no inherent chemical significance but provides an unambiguous way to identify a chemical substance or molecular structure when there are many possible systematic, generic, proprietary, or trivial names. CAS Registry Numbers are used in many other public and private databases as well as chemical inventory listings and of course are included in all CAS produced databases.
  2. Additional CAS Numbers- Some CAS numbers have changed over the years. We have supplied some of the CAS numbers used to refer to this compound that may be no longer applicable.
  3. Use Information- This field is a brief description on how the chemical is used. The information in this field may include some information regarding production of the chemical in the United States.
  4. Use Information Reference-The reference from which the Use Information was obtained. This field may or may not be linked to another Internet webpage.

Regulatory Information Table

This table gives a synopsis of the Wisconsin Administrative Codes that affect that pollutant. [Note: Not all of the Wisconsin Administrative Codes affecting these pollutants, particularly the criteria air pollutants, are listed.]

  1. Clean Air Act Pollutant?- Is this a pollutant listed in the 1990 Clean Air Act Amendments (42 USC 7401) as either a criteria air pollutant (i.e. an air pollutant with a National Ambient Air Quality Standard (exit DNR))or 188 air toxics (exit DNR).
  2. NR 445 Pollutant?-Chapter NR 445 Control of Hazardous Pollutants, Wis. Adm. Code, regulates the emissions of hazardous air pollutants in Wisconsin. Chapter NR 445 was originally promulgated in 1988. Extensive changes were made to NR 445 and the amended administrative code became effective on July 1, 2004. For the specific rule go to the Wisconsin Revisor of Statutes website (exit DNR).
  3. NR 407 Pollutant?-Chapter NR 407 Operation Permits, Wis. Adm. Code, contains a list under Table 2 of NR 407.05, that supplies the maximum theoretical emissions amount of an air contaminant above which the permit applicant must include information on their permit application. For further information regardng this administrative code, please go to the Wisconsin Revisor of Statutes website (exit DNR).
  4. New NR 438 Pollutant?-Besides amending NR 445, Wis. Adm. Code on July 1, 2004, DNR also modified Chapter NR 438 Air Contaminant Emission Inventory Reporting Requirements (exit DNR) . DNR added a total of 114 pollutants to the existing list of NR 438 pollutants.

NR 438 and NR 407 Information Table

This table supplies inclusion numbers from Table 2 of NR 407.05, Wis. Adm. Code and reporting threshold numbers from Tables 1 and 2 of NR 438.03, Wis. Adm. Code. The NR 407 inclusion level is the maximum theoretical emissions amount of an air contaminant above which the permit applicant must include information on their permit application. The NR 438 reporting threshold number is the number above which the facility is required to report the air emission for a particular pollutant in the annual air emission inventory. Information regarding air contaminants in Chapter NR 445.04, Wis. Adm. Code, have not been included because different air pollutants have different compliance requirements under this rule. For specific information regarding Chapter NR 445, Wis. Adm Code, go to the Wisconsin Revisor of Statutes website (exit DNR).

  1. NR 407 Inclusion Amount-The NR 407 inclusion level is the maximum theoretical emissions amount of an air contaminant above which the permit applicant must include information on their permit application.
  2. Post July 1, 2004 NR 438 Reporting Level -The NR 438 reporting level for the air contaminant after the pollutant lists in NR 438 were changed after rule finalization on July 1, 2004.
  3. Pre July 1, 2004 NR 438 Reporting Level-The original NR 438 reporting level effective on June 1, 1993.
  4. Increase (+) or Decrease (-) in NR 438 Reporting Level-A comparison between the original NR 438 reporting level and the amended NR 438 reporting level. A negative number shows a decrease in reporting level. A positive number shows an increase in reporting level.
  5. NR 438 Emission Fee Information-DNR is allowed to charge an emission fee for certain pollutants listed in NR 438, Wis. Adm. Code. These "billable" emissions must exceed five tons facility-wide before an emission fee is assessed. There are some pollutants (e.g. particulate matter, volatile organic compounds) that are charged an emission fee for the category of the pollutant but not for the particular pollutant. For example, arsenic is an air contaminant that is a dust (i.e. particulate matter) when emitted into the environment. The pollutant arsenic is not assessed an emission fee but the amount of arsenic particulate matter is assessed an emission fee when all of the particulate matter emissions are totalled at a facility and this amount exceeds five tons.

Reference Information Table

This table contains references to information regarding the particular pollutant. The information available could be from the United States Environmental Protecion Agency, the University of Wisconsin's Solid and Hazardous Waste Education Center (SHWEC), or the National Library of Medicine's ChemID Plus database.

  1. United States Environmental Protection Agency (USEPA) Reference Information-Appendix E, Regulatory Matrix: TRI Chemicals in Other Federal Programs-This list shows all federal programs in which the pollutant is regulated.
  2. University of Wisconsin Extension Solid and Hazardous Waste Education Center (SHWEC) Reference Information-David Liebl (SHWEC) compiled information on certain air contaminants as part of his work in assisting DNR during the amending of Chapter NR 445, Wis. Adm. Code.
  3. Information on Pollutant Synonyms, Registry of Toxic Effects of Sustances (RTECS), The National Institute of Health and Safety (NIOSH) Pocket Guide to Chemical Hazards, USEPA Substance Registry System, Agency for Toxic Substances and Disease Registry (ATSDR), USEPA Substance Registry System (EPA CRS) and National Institute of Health Reference Information-The National Library of Medicine's ChemID Plus database is a data warehouse in which information for a particular pollutant from a particular database can be found. Some of the databases available from ChemID Plus include Registry of Toxic Effects of Sustances (RTECS), The National Institute of Health and Safety (NIOSH) Pocket Guide to Chemical Hazards, USEPA Substance Registry System, Agency for Toxic Substances and Disease Registry (ATSDR), USEPA Substance Registry System (EPA CRS) and National Institute of Health.
    4. Last Revised: Monday December 17 2007