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4. Plant Process Unit.
The name used to identify a unique process operation. A process may include several
Sources. Limit 10 characters.
5. SSC Code (Mandatory).
An EPA-developed Source Classification Code (SCC) for particular FIN. This code may
represent the process performed by the FIN, the material processed and size of the FIN.
Adding and changing sources entails the selection of SSC. COMPASS-EI provides an
easy-to-use SCC look-up feature. Users access this feature by clicking on the SCC drop
down arrow.
6. Operating Hours/Day.
Represents the actual hours per day the FIN operated. This field must be numeric and no
longer than 2 digits. Valid values are between 1 and 24, inclusive.
7. Operating Days/Week (Mandatory).
Represents the actual days per week the FIN operated. This field must be numeric and no
longer than 1 digit. Valid values for this field is between 1 and 7, inclusive.
8. Operating Weeks/Year (Mandatory).
Represents the actual weeks per year the FIN operated. This field must be numeric and no
longer than 2 digits. Valid values for this field are between 1 and 52, inclusive.
9. Seasonal Operating Percent (Mandatory).
The annual operating percentage for each seasonal quarter. These quarters are based on
seasons of the year and are not calendar quarters. Summation totals equal 100% or be
equal to zero.
10. Operating Status (Mandatory).
Mark here if the source is Active, Permanently Shut Down, Demolished, Ownership
Transferred, Idle, or Permitted But Never Built.
Definitions of terms are provided below:
Active. Check if the source operated during the year of the emissions inventory.
Permanently Shut Down. Check if the source will no longer operate and has not
operated during this emission inventory period.
Demolished Removed from Site. Check if the source has been demolished and
removed from the plant/site.
Ownership Transfer. Check if the source has been sold or if responsibility for the
source has been transferred to another owner or separate entity. List the name of the
new liable party in comments. Enter the new owner or operator's agency Account
Number and the appropriate date in the comments.
Idle for Current inventory Year. Check if the source was idle during the year of
the emissions inventory.
Permitted but Never Built. Check if the source was permitted and never built.
COMPASS-EI–Manual – Chapter 4
Page 24
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