| (111) Surface casing--The first string of casing (after
the conductor casing, if any) that is set in a well.
(112) Temporary injection point--A method of Class
V injection that uses push point technology (injection probes pushed
into the ground) for the one-time injection of fluids into or above
an underground source of drinking water.
(113) Total dissolved solids--The total dissolved (filterable)
solids as determined by use of the method specified in 40 Code of
Federal Regulations Part 136, as amended.
(114) Transmissive fault or fracture--A fault or fracture
that has sufficient permeability and vertical extent to allow fluids
to move between formations.
(115) Underground injection--The subsurface emplacement
of fluids through a well.
(116) Underground injection control--The program under
the federal Safe Drinking Water Act, 42 United States Code, Part C,
including the approved Texas state program.
(117) Underground source of drinking water--An "aquifer"
or its portions:
(A) which supplies drinking water for human consumption;
or
(B) in which the groundwater contains fewer than 10,000
milligrams per liter total dissolved solids; and
(C) which is not an exempted aquifer.
(118) Upper limit--A parameter value established by
the commission in a permit/production area authorization which when
exceeded indicates mining solutions may be present in designated monitor
wells.
(119) Verifying analysis--A second sampling and analysis
or measurement with instrumentation of control parameters for the
purpose of confirming a routine sample analysis or measurement which
indicated an increase in any control parameter to a level exceeding
the upper limit. Mining solutions are assumed to be present in a designated
monitor well if a verifying analysis confirms that any control parameter
in a designated monitor well is present in concentration equal to
or greater than the upper limit value.
(120) Well--A bored, drilled, or driven shaft whose
depth is greater than the largest surface dimension, a dug hole whose
depth is greater than the largest surface dimension, an improved sinkhole,
or a subsurface fluid distribution system but does not include any
surface pit, surface excavation, or natural depression.
(121) Well injection--The subsurface emplacement of
fluids through a well.
(122) Well monitoring--The measurement by on-site instruments
or laboratory methods of any chemical, physical, radiological, or
biological property of the subsurface strata or their contained fluids
penetrated by the wellbore.
(123) Well stimulation--Several processes used to clean
the well bore, enlarge channels, and increase pore space in the injection
interval, thus making it possible for fluid to move more readily into
the formation including, but not limited to, surging, jetting, and
acidizing.
(124) Workover--An operation in which a down-hole component
of a well is repaired, the engineering design of the well is changed,
or the mechanical integrity of the well is compromised. Workovers
include operations such as sidetracking, the addition of perforations
within the permitted injection interval, and the addition of liners
or patches. For the purposes of this chapter, workovers do not include
well stimulation operations.
|
| Source Note: The provisions of this §331.2 adopted to be effective May 13, 1986, 11 TexReg 1980; amended to be effective July 5, 1989, 14 TexReg 3047; amended to be effective June 22, 1992, 17 TexReg 4097; amended to be effective January 2, 1995, 19 TexReg 10099; amended to be effective June 28, 1996, 21 TexReg 5443; amended to be effective April 28, 1997, 22 TexReg 3526; amended to be effective November 23, 2000, 25 TexReg 11433; amended to be effective July 12, 2001, 26 TexReg 5019; amended to be effective January 9, 2003, 28 TexReg 340; amended to be effective October 2, 2003, 28 TexReg 8367; amended to be effective September 16, 2004, 29 TexReg 8824;amended to be effective July 5, 2006, 31 TexReg 5339; amended to be effective July 10, 2008, 33 TexReg 5342; amended to be effective March 12, 2009, 34 TexReg 1638; amended to be effective August 16, 2012, 37 TexReg 6078; amended to be effective May 19, 2016, 41 TexReg 3513; amended to be effective May 28, 2020, 45 TexReg 3458 |
