[Code of Federal Regulations]
[Title 40, Volume 20]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR144.81]

[Page 680-681]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 144_UNDERGROUND INJECTION CONTROL PROGRAM--Table of Contents
 
  Subpart G_Requirements for Owners and Operators of Class V Injection 
                                  Wells
 
Sec.  144.81  Does this subpart apply to me?

    This subpart applies to you if you own or operate a Class V well, 
for example:
    (1) Air conditioning return flow wells used to return to the supply 
aquifer the water used for heating or cooling in a heat pump;
    (2) Large capacity cesspools including multiple dwelling, community 
or regional cesspools, or other devices that receive sanitary wastes, 
containing human excreta, which have an open bottom and sometimes 
perforated sides. The UIC requirements do not apply to single family 
residential cesspools nor to non-residential cesspools which receive 
solely sanitary waste and have the capacity to serve fewer than 20 
persons a day.
    (3) Cooling water return flow wells used to inject water previously 
used for cooling;
    (4) Drainage wells used to drain surface fluids, primarily storm 
runoff, into a subsurface formation;
    (5) Dry wells used for the injection of wastes into a subsurface 
formation;
    (6) Recharge wells used to replenish the water in an aquifer;
    (7) Salt water intrusion barrier wells used to inject water into a 
fresh aquifer to prevent the intrusion of salt water into the fresh 
water;
    (8) Sand backfill and other backfill wells used to inject a mixture 
of water and sand, mill tailings or other solids into mined out portions 
of subsurface mines whether what is injected is a radioactive waste or 
not.
    (9) Septic system wells used to inject the waste or effluent from a 
multiple dwelling, business establishment, community or regional 
business establishment septic tank. The UIC requirements do not apply to 
single family residential septic system wells, nor to non-residential 
septic system wells which are used solely for the disposal of sanitary 
waste and have the capacity to serve fewer than 20 persons a day.
    (10) Subsidence control wells (not used for the purpose of oil or 
natural gas production) used to inject fluids into a non-oil or gas 
producing zone to reduce or eliminate subsidence associated with the 
overdraft of fresh water;
    (11) Injection wells associated with the recovery of geothermal 
energy for heating, aquaculture and production of electric power;
    (12) Wells used for solution mining of conventional mines such as 
stopes leaching;
    (13) Wells used to inject spent brine into the same formation from 
which it was withdrawn after extraction of halogens or their salts;
    (14) Injection wells used in experimental technologies.
    (15) Injection wells used for in situ recovery of lignite, coal, tar 
sands, and oil shale.
    (16) Motor vehicle waste disposal wells that receive or have 
received fluids from vehicular repair or maintenance activities, such as 
an auto body repair shop, automotive repair shop, new and used car 
dealership, specialty repair shop (e.g., transmission and muffler repair 
shop), or any facility that does any vehicular repair work. Fluids 
disposed in these wells may contain organic and inorganic chemicals in 
concentrations that exceed the maximum contaminant levels (MCLs) 
established by the primary drinking water regulations (see 40 CFR part 
141). These fluids also may include waste petroleum

[[Page 681]]

products and may contain contaminants, such as heavy metals and volatile 
organic compounds, which pose risks to human health.

[64 FR 68566, Dec. 7, 1999, as amended at 67 FR 39593, June 7, 2002]

              Requirements for All Class V Injection Wells