Current through all regulations passed and filed through December 16, 2024
(A) All existing and new class I hazardous
waste injection wells shall be constructed and completed by owners and
operators to do the following:
(1) Prevent the movement of fluids into or
between USDWs or into any unauthorized zones.
(2) Permit the use of appropriate testing
devices and work over tools.
(3)
Permit continuous monitoring of injection tubing and long string casing as
required pursuant to rule
3745-34-56 of the Administrative
Code.
(B) All well
materials used in the construction or repair of
existing and new class I hazardous waste
injection wells shall be compatible with fluids with which the
materials may be expected to come into contact. All
areas of a well that may come into contact with corrosive wastes shall be
constructed of corrosion resistant materials. A class I injection well shall be deemed by the director
to have compatibility as long as the materials used in the construction of the
well meet or exceed the requirements of this rule.
(C) Casing and cementing of new wells.
(1) Casing and cement used in the
construction of each newly drilled class I
injection well or the repair of an existing class
I injection well shall be designed for the life expectancy of the well,
including the post-closure care period. The casing and cementing program shall
be designed to prevent the movement of fluids into or between USDWs, and to
prevent potential leaks of fluids from the class I
injection well. In establishing casing and cementing requirements of the
permit or the repair plan, the director shall
consider the following information as required by rule
3745-34-59 of the Administrative
Code:
(a) Depth to the injection zone.
(b) Injection pressure, external pressure,
internal pressure and axial loading.
(d) Size
and grade of all casing strings (wall thickness, diameter, nominal weight,
length, joint specification and construction material).
(e) Corrosiveness of injected fluid,
formation fluids and temperature.
(f)
Lithology of injection and confining zones.
(g) Type or grade of cement.
(h) Quantity and chemical composition of the
injected fluid.
(2) One
surface casing string shall, at a minimum, extend into the confining bed below
the lowest formation that contains a USDW and be cemented by circulating cement
from the base of the casing to the surface, using a minimum of one hundred
twenty per cent of the calculated annular volume. The director may require more
than one hundred twenty per cent when the geology or other circumstances
warrant to protect underground sources of drinking water.
(3) At least one long string casing, using a
sufficient number of centralizers, shall extend to the injection zone and shall
be cemented by circulating cement to the surface in one or more
of the following stages:
(a) Of sufficient quantity and quality to
withstand the maximum operating pressure.
(b) In a quantity no less than one hundred
twenty per cent of the calculated volume necessary to fill the annular space.
The director may require more than one hundred twenty per cent when the geology
or other circumstances warrant to protect underground sources of drinking
water.
(4) Circulation
of cement may be accomplished by staging. The director may approve an
alternative method of cementing in cases where the cement cannot be
recirculated to the surface, provided the owner or operator can demonstrate by
using logs that the cement is continuous and does not allow fluid movement
behind the well bore and it is still protective of underground sources of
drinking water.
(5) Casings,
including any casing connections, shall be rated to have sufficient structural strength
to withstand, for the design life of the well the
following:
(a) The maximum
burst and collapse pressures that may be experienced during the construction,
operation, and closure of the well.
(b) The
maximum tensile stress that may be experienced at any point along the length of
the casing during the construction, operation, and closure of the
well.
(6) At a minimum,
cement and cement additives must be of sufficient quality and quantity to
maintain integrity over the design life of the well.
(D) Tubing and packer.
(1) All class I hazardous waste injection
wells shall inject fluids through tubing with a packer,
both designed for the expected service, set at a point approved by the
director.
(2) In determining and
specifying requirements for tubing and packer, the director shall consider the
following factors, among others:
(b)
Characteristics of injection fluid (chemical content, corrosiveness,
temperature and density).
(e) Rate
(intermittent or continuous), temperature and volume of injected fluid.
(g) Tubing tensile, burst, and collapse
strengths.
(3)
At the written request of the operator, the director
may approve the use of an alternative to the packer if the alternative method
will reliably provide a comparable level of protection to underground sources
of drinking water.