If your permit contains limitations on hours of operation, material usage/production, fuel usage, or other numerical limits and must maintain a record of the 12-month consecutive total or consecutive average of actual operational parameters, you may find this tool useful.
The spreadsheet/tool begins with a set of instructions.
The webinar highlighting how to use the rolling 12-month calculator was held on March 22, 2018. The archived webinar is available below. You can also view the introductory presentation that was shown during the webinar.