D.C. Mun. Regs. r. 21-1825
The materials and the methods used to construct, maintain, and abandon a recovery well shall be compatible with the chemical and physical properties of the pollutants known to exist or potentially exist where a well will be sited.
A recovery well borehole shall not penetrate to a depth greater than the depth from which contaminants are to be recovered.
If a well or borehole extends to a depth greater than the depth from which contaminants are to be recovered, the well or borehole shall be grouted in accordance with § 1818 to prevent vertical migration of contaminants.
No person shall discharge the effluent of a recovery well to the waters of the District prior to obtaining all applicable District and federal permits.
D.C. Mun. Regs. r. 21-1825