The following classes of tanks are exempt from this chapter with the exception of the application of §§ 7406 and 7409 of this title:

1. (1) Agricultural and residential tanks of 1,100 gallons or less used for storing motor fuel for noncommercial purposes; and
2. (2) Tanks containing heating fuels of 1,100 gallons or less which are used for consumptive purposes on the premises where stored.

65 Del. Laws, c. 161, § 1; 66 Del. Laws, c. 187, § 2; 66 Del. Laws, c. 425, § 2