In determining the amount of special fuel tax due under this section, the person may exclude the amount of special fuel that will not be pumped out of the storage tank because the special fuel is below the mouth of the draw pipe. For this purpose, the person may deduct two hundred (200) gallons for a storage tank with a capacity of less than ten thousand (10,000) gallons, and four hundred (400) gallons for a storage tank with a capacity that exceeds ten thousand (10,000) gallons.
IC 6-6-2.5-29