D.C. Mun. Regs. tit. 20, § 3114
Hazardous and Buoyant Materials Storage and Emergency Plans
Effective Jun 20, 202572 DCR 006821Authority: District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code § 8-151.01 et seq.); the Water Pollution Control Act of 1984, effective March 16, 1985 (D.C. Law 5-188; D.C. Official Code § 8-103.01 et seq.); the Soil Erosion and Sedimentation Control Act of 1977, effective September 28, 1977 (D.C. Law 2-23; 24 DCR 000792); the District of Columbia Applications Insurance Implementation Act, effective May 26, 1976 (D.C. Law 1-64; D.C. Official Code § 6-501 et seq.); and Mayor’s Order 2006-61, dated June 14, 2006. Source: Final Rulemaking published at 72 DCR 006821 (June 20, 2025).District of Columbia, Office of the Secretary
3114.1 Any proposed development on a development site that is located wholly or partially inside a flood hazard area and involves a facility that produces, stores, or disposes of hazardous materials shall be considered a critical facility and subject to § 3113.
3114.2 Any proposed development described in § 3114.1 shall be:
- (a) Elevated or designed and constructed to remain dry and prevent pollution from the facility in the event of a flood reaching the DFE for critical facilities specified in § 3107.4; and
- (b) Constructed in accordance with the standards for dry floodproofing contained in § 3108.7.
3114.3 The owner of a property or a facility that is located wholly or partially inside a flood hazard area shall store any hazardous materials so that they do not come into contact with floodwaters or become debris in the event of a flood reaching the DFE for critical facilities specified in § 3107.4.
3114.4 The owner of a property or a facility that is located wholly or partially inside a flood hazard area that stores buoyant materials, including tires, storage tanks, lumber, auto body components, insulation, and prefabricated above-ground pools, shall:
- (a) Not store the materials in a flood hazard area for more than sixty (60) days ; and
- (b) Anchor or enclose the materials to resist flotation.
SOURCE: Final Rulemaking published at 72 DCR 006821 (June 20, 2025).