| (a) All wells which are required to be plugged or capped
under Texas Occupations Code, Chapters 1901 and 1902 or this chapter
shall be plugged and capped by a licensee or well owner in accordance
with the following specifications and in compliance with the local
groundwater conservation district rules or incorporated city ordinances:
(1) all removable casing shall be removed from the
well;
(2) any existing surface completion shall be removed;
(3) the entire well pressure filled via a tremie pipe
with cement from bottom up to the land surface;
(4) In lieu of the procedure in paragraph (3), the
well shall be pressure filled via a tremie tube with clean bentonite
grout of a minimum 9.1 pounds per gallon weight followed by a cement
plug extending from land surface to a depth of not less than two (2)
feet, or if the well to be plugged has one hundred (100) feet or less
of standing water the entire well may be filled with a solid column
of 3/8 inch or larger granular sodium bentonite hydrated at frequent
intervals while strictly adhering to the manufacturers' recommended
rate and method of application. If a bentonite grout is used, the
entire well from not less than two (2) feet below land surface may
be filled with the bentonite grout. The top two (2) feet above any
bentonite grout or granular sodium bentonite shall be filled with
cement as an atmospheric barrier. Bentonite grout may not be used
if a water zone contains chlorides above one thousand five hundred
(1,500) ppm or if hydrocarbons are present.
(5) Injurious water shall be isolated from the fresh
water zone(s) with cement plugs and the remainder of the wellbore
filled with neat cement or clean bentonite grout of a minimum 9.1
weight followed by a cement plug extending from land surface to a
depth of not less than two (2) feet.
(b) Large hand dug and bored wells thirty-six (36)
inches or greater in diameter to one hundred (100) feet in depth may
be plugged by back filling with compacted clay or caliche to surface.
All removable debris shall be removed from the well. If the well contains
standing water, it shall be chlorinated by adding chlorine bleach
at a rate of one (1) gallon of bleach for every five hundred (500)
gallons of standing water. The backfill material shall be mounded
above the surrounding surface to compensate for settling.
(c) Wells which do not encounter groundwater (dry holes)
may be plugged by backfilling with drill cuttings from total depth
to the surface. The backfill material shall be mounded above the surrounding
surface to compensate for settling.
(d) A non-deteriorated well which contains casing in
good condition and is beneficial to the landowner can be capped with
a covering capable of preventing surface pollutants from entering
the well and sustaining weight of at least four hundred (400) pounds
and constructed in such a way that the covering cannot be easily removed
by hand.
(e) For the purpose of plugging a well, any licensee
or landowner can remove the pump.
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