Section 615.721  Applicability

This Subpart applies to any existing unit for the storage and related handling of de-icing agents that is located wholly or partially within a setback zone and at which more than 50,000 pounds of de-icing agent are stored or accumulated at any one time, except as otherwise provided in Section 615.105. For the purpose of this Subpart:

a)         An indoor storage unit means a storage unit with a roof capable of protecting de-icing agents from wind and precipitation;

b)         An outdoor storage unit means a unit for the storage of de-icing agents that is not an indoor storage unit.