Emission units are groups of process units that fall under the same regulatory requirements. One benefit of emission units is that they allow you to summarize emissions for an entire group of process units. For example, suppose a regulation states that each boiler at your entity can only emit 2 tons of NOx per year. Yet, the same regulation may impose a limit of 10 tons of NOx per year for an entire emission unit of boilers. So if the emission unit contains 5 boilers, under the cap limit, the 5 boilers can operate in a more flexible manner. One boiler can emit 5 tons, another can emit 3 tons, and the remaining 3 can emit 2 tons. Therefore, emission units afford operational flexibility when compared to the equivalent emission limits that would exist if each boiler's emissions were compared to the limit individually, 2 tons per year.
In addition to providing operational flexibility, emission units also allow you to have independent regulatory and plant identification for a process unit. As an example, some states require sequential numbering of emission sources, which can lead to a confusing situation. The regulatory agency wants to see your source called 0045, but the internal plant ID for the process unit is SC-100-A. Emission units allow you to handle these two naming conventions. You could enter your plant ID for the process unit ID, and then assign it to an emission unit that uses the regulatory naming convention.
Other important benefits of emission units are that they can be used to track compliance parameters related to monitoring requirements, such as roof gap measurements for tank inspections, and to define properties about materials used in the emission unit.
Tip: Process units can also be associated with emission units
on the Process Unit form.
On the Emission Unit form, set up groups of process units based on your operating permits or regulatory requirements. Once you have set up the groups, you can monitor the emission unit's compliance with permitted limits, and you can track properties and monitoring parameters for the materials used in the emission unit.
To establish emission units
Use one of the following paths in the Navigation Tree to access the Emission Units list:
Air module
Click Data Entry > Emission Unit Information > Emission Units.
Compliance Manager module
Click Data Entry > Validation > Emission Units.
Water module
Click Data Entry > Outfall Information > Emission Units.
Process Data Manager module
Click Data Entry > Process Unit Hierarchy > Emission Units.
Click the New
button.
The Emission Unit form is displayed.
Select an Enterprise
Entity from the list.
If the appropriate entity is not listed, click the Ellipsis
button and add it.
Enter the Emission Unit name and Description.
Click Save.
Assign process units by expanding the Process Units section, if necessary, and clicking Add Process Units. Otherwise, no additional action is required.
Click the check box adjacent to a process unit to select it. Remove a selection by clicking the check box to clear it. Only process units with a checkmark in the check box adjacent to the unit name will be added.
Click the Add
Process Units button.
Each assigned process unit is displayed as a line item in the Process Units section with a link
to the Process Unit form.
Click the Delete button adjacent
to the line item to remove an assignment. Click the link to open the
Process Unit form for the
process unit.
Click Save.
Repeat steps 2 through 9 to establish other emission units.
