Current through all regulations passed and filed through December 16, 2024
(A) Class I.
(1) Wells used by generators of hazardous
waste or owners or operators of hazardous waste management facilities to inject
hazardous waste beneath the lowermost formation containing an underground
source of drinking water (USDW) within one
-quarter mile of the well bore.
(2) Other industrial and municipal disposal
wells that inject fluids beneath the lowermost formation containing
a USDW within one
-quarter mile of the well bore.
(3) Radioactive waste disposal wells that
inject fluids below the lowermost formation containing
a USDW within one
-quarter mile of the well bore.
(B) Class II. Wells
that
may inject brines and other fluids
associated with
oil and gas production, and hydrocarbons for storage. Requirements of this type
of injection well are referenced in Chapter 1509. of the Revised Code and
division 1509:9 of the Administrative Code.
(C) Class III. Wells
that
may inject fluids associated with solution mining of minerals
beneath
the lowermost USDW. Requirements for this type of injection well are referenced
in division 1509. of the Revised Code and Chapter 1509:9 of the Administrative
Code.
(D) Class
IV.
(1) Wells used by generators of hazardous
waste or of radioactive waste, by owners or operators of hazardous waste
management facilities, or by owners or operators of radioactive waste disposal
sites to dispose of hazardous waste or radioactive waste into a formation which
contains
a USDW within one
-quarter mile of the well.
(2) Wells used by generators of hazardous
waste or of radioactive waste, by owners or operators of hazardous waste
management facilities, or by owners or operators of radioactive waste disposal
sites to dispose of hazardous waste or radioactive waste above a formation that
within one-quarter mile of the well contains
a
USDW.
(3) Wells used by
generators of hazardous waste or owners or operators of hazardous waste
management facilities to dispose of hazardous waste, which cannot be classified
under paragraph (A)(1) or paragraphs (D)(1) and (D)(2) of this rule
.
(E) Class V. Injection wells not included in
class I, II, III, or IV. Typically, class V wells are shallow wells used to
place a variety of fluids directly below the land surface into or above
formations that contain USDWs. However, if the fluids placed in the ground
qualify as a hazardous waste under the Resource Conservation and Recovery Act
(RCRA), then the well is either a class I or class IV well, not a class V well.
Class V wells include, but are not limited to the
following:
(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, that have an open bottom and sometimes have perforated sides. The
underground
injection control requirements do not apply to single-family residential
cesspools nor to non-residential cesspools that receive solely sanitary wastes
and have the capacity to serve fewer than twenty persons a day
.
(3) Cooling water return flow wells used to
inject water previously used for cooling.
(4) Drainage wells used to drain surface
fluid, 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 or used as part of an
aquifer storage and recovery project .
(7)
Salt water intrusion barrier wells used to inject water into a fresh water
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
underground
injection control requirements do not apply to single-family residential
septic system wells, nor to non-residential septic system wells that are used
solely for the disposal of sanitary waste and have the capacity to serve fewer
than twenty 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, aquiculture and production of
electric power
.
(12) Radioactive waste
disposal wells other than class IV or class I wells that inject radioactive
material listed in 10 CFR part 20, "appendix B," "table II," column 2
.
(13)
Wells used for solution mining of conventional mines such as stopes leaching
.
(14)
Wells used to inject spent brine into the same formation from which it was
withdrawn after extraction of halogens or their salts
.
(15) Injection wells used in experimental
technologies
.
(16) Injection wells used
for in-situ recovery of lignite, coal, tar sands, and oil shale
.
(17) Motor vehicle waste disposal wells as
defined in rule
3745-34-01 of the Administrative
Code .
(18) Wells used to inject fluids for the
remediation of contaminated soils or ground water.
[Comment: This rule references the
following "Code of Federal Regulations": 10 CFR Part 20, appendix B, table II,
column 2, last amended September 30, 2015. Copies of this code may be obtained
from the "U.S. Government Bookstore" toll-free at (866) 512-1800 or
https://www.gpo.gov/fdsys, or from "Ohio EPA, Lazarus Government Center, 50
West Town Street, Suite 700, Columbus, OH, 43215," (614) 644-2752. The code is
available for review at "Ohio EPA, Lazarus Government Center, 50 West Town
Street, Suite 700, Columbus, OH, 43215."]