The following ground waters shall be classified as Class G1 if they are of drinking water quality:
The following ground waters shall be classified as Class G2:
Class G3 ground waters shall be those that can neither be grouped under Class G1 nor under Class G2.
In order to adequately maintain and preserve ground water quality within the District, where land use is affecting or has the potential to affect ground water quality, the Director, Department of Consumer and Regulatory Affairs, shall identify areas that are highly vulnerable to ground water contamination. Class G1, G2, G3 ground water shall then be designated as ground water vulnerable to ground water contamination.
D.C. Mun. Regs. r. 21-1152