D.C. Mun. Regs. tit. 21, § 1816
1816.1 No person shall construct a well in which the well screen extends across more than one aquifer, unless:- (a) A special compliance standard request was submitted in accordance with §§ 1803.10 and 1803.11;
- (b) Adequate justification is provided to support the request;
- (c) The cross-contamination of aquifers is prevented; and
- (d) The request is approved by the Department in the well construction work plan.1816.2 A well that derives water from an unconsolidated aquifer shall be equipped with a well screen that limits the entrance of sediment material into the well following well development.1816.3 Only a machine-manufactured well screen shall be used in the construction of a well, unless otherwise approved by the Department.1816.4 A well screen shall have sufficient structural strength to support the intended use of the well.1816.5 A well screen shall be installed with fittings necessary to seal the well screen to the well casing.1816.6 A lead packer and lead swedge shall not be used to seal a well screen to the well casing.1816.7 A fitting shall be provided to close the bottom of the well screen and to cap, plug, or otherwise close the bottom of the well.1816.8 A well screen of a well sited on a property where a recognized environmental condition has been identified shall be constructed to prevent structural degradation.
Source: Final Rulemaking published at 63 DCR 13424 (October 28, 2016).