§146.5. Classification of injection wells. — Inbound Citations

(a) Generally, wells covered by this subpart inject non-hazardous fluids into or above formations that contain underground sources of drinking water. It includes all wells listed in § 146.5(e) but is not limited to those types of injection wells.

(A) Sand or other backfill wells [§ 146.5(e)(8)];

(A) Sand or other backfill wells (40 CFR 144.81(8) and 146.5(e)(8) of this chapter);

(B) Radioactive waste disposal wells that are not Class I wells (40 CFR 146.5 (e)(11))

(C) Geothermal energy recovery wells [§ 146.5(e)(12)];

(B) Geothermal energy recovery wells (40 CFR 144.81(11) and 146.5 (e)(12) of this chapter);

(D) Brine return flow wells [§ 146.5(e)(14)];

(C) Brine return flow wells (40 CFR 144.81(13) and 146.5 (e)(14) of this chapter);

(E) Wells used in experimental technologies [§ 146.5(e)(15)];

(D) Wells used in experimental technology (40 CFR 144.81(14) and 146.5 (e)(15) of this chapter);