If my facility doesn operate all four quarters, why do the seasonal throughput percentages have to sum to 100% (on worksheet 1)?
The sum of the seasonal throughput percentages represents the total amount of time you operated during the calendar year, not the percentage of your capacity that you operated. The sum of the percentages should always equal 100%. For example, if you burned 90 million cubic feet of natural gas from June-August, 10 million cubic feet of natural gas from September- November and no natural gas during the other quarters, you would enter 0% for December-February, 0% for March-May, 90% for June-August and 10% for September-December.