For the purposes of this chapter and D.C. Code § 43-1607(3) (1990 Repl. Vol.), sources other than the District water supply system shall include, but are not. limited to, groundwater and cooling water.
Sewer service charges under D.C. Code § 43-1607(3) (1990 Repl. Vol.) shall not be assessed when the discharge of wastewater is into a separate storm sewer which is totally isolated from the sanitary or combined sewer system of the District.
D.C. Mun. Regs. tit. 21, r. 21-205