Emission Inventory Business Rules

The air emission inventory was moved from its own database to a database containing information for permits, compliance, and emission inventory. Because it is now located in a new database it needed to conform to business rules established in that database. Because of this a number of changes were made to the data by the facility and DNR. These changes were necessary to meet the requirements of the business rules of the database. Listed below are some of the business rules which affected the 2008 air emission inventory.

1. Business Rule: Processes are no longer allowed to have fugitive control efficiencies.
   Primarily Affected: Primarily affected nonmetallic mining and hot mix asphalt plants.
   Fix: Fugitive control efficiencies were factored into emission factor.
2. Business Rule: Only Source Classification Codes (SCCs) with uncontrolled emission factors obtained from WebFire in May 2008 are allowed.
   Primarily Affected: Large number of facilities where an SCC code was used last year that did not have an uncontrolled emission factor.
   Fix: SCCs with uncontrolled emission factors that were close to the SCC not having uncontrolled emission factors were chosen. Source specific emission factors from 2007 were used if the SCC was not an identical match.
3. Business Rule: Only units used by emission factors under a source classification code can be used for reporting material or fuel. For example, an emission factor with a unit of mass requires a reportable quantity of mass.
   Primarily Affected: Large number of facilities reporting in an SCC code with a mass emission factor that reported a volume last year. Changes were also made to throughput units so that they conformed to emission factor units of time, quantity or distance.
   Fix: We either found another SCC with emission factors having the correct units or converted the material reported to the correct units.
4. Business Rule: A device can only perform one operation. For example a device can either burn a fuel or make a product but it cannot do both.
   Primarily Affected: Large number of facilities in the printing industry. These facilities generated emissions by processing paper and then drying the paper. The dryer emissions were split into two devices - one for production and one for fuel burning.
   Fix: Devices that were conducting two separate functions were split into two. The original device remained and one of the processes was retired. A second device, generally designated with the ID of the first device plus the letter A, was added and the information from the second process transferred to the new device.
5. Business Rule: DNR no longer calculates breathing and working losses from storage tanks.
   Primarily Affected: Companies owning tank farms.
   Fix: Facilities were asked to run the EPA Tanks 4.09D program and then enter the Tanks 4.09D in the reported tab in the ARS program. For those companies that did not use the Tanks 4.09D program, DNR entered information into the Tanks 4.09D program based on permit information and then entered this information into the Reported tab into the ARS program.
6. Business Rule: The 2001 Hot Mix Asphalt Plant agreement states that the facility will be given a 50% sulfur dioxide reduction credit based on scavenging of sulfur dioxide from the aggregate in the hot mix asphalt drum plant. The amount of sulfur dioxide is determined by the amount of aggregate generated in the hot mix asphalt drum and the sulfur content of the fuel used in the drum plant to make the asphalt. The new database would no longer allow the use of the sulfur content of the fuel in the emission factor calculation.
   Primarily Affected: All asphalt plants with a drum mixer.
   Fix: A representative sulfur content for the fuels used in the drum mixer was developed based on 2007 data. From that data an emission factor for all drum mix plants was developed and applied to all drum mixers.

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