10 CSR 23-3.080 - Liners
(1) General specifications. All liners shall
-
(A) Be new and meet minimum specifications
in Table 3.8. Liner shall be new, which includes used liner that is salvaged
from a water supply well within ninety (90) days of installation and is
decontaminated. Liner must meet one (1) of the following:
1. ASTM F480-14 Standard
Specification for Thermoplastic Well Casing Pipe and Coupling Made in Standard
Dimension Ratios (SDR), SCH 40 and SCH 80. This standard is
incorporated by reference as published March 1, 2014, by ASTM International,
100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 and does
not incorporate any subsequent amendments or additions;
2. Grade A or B of ASTM A53-A53M-20,
Standard Specifications for Pipe, Steel, Black and Hot-Dipped,
Zinc-Coated, Welded, and Seamless. This standard is incorporated by
reference as published July 15, 2020, by ASTM International, 100 Barr Harbor
Drive, PO Box C700, West Conshohocken, PA 19428-2959 and does not incorporate
any subsequent amendments or additions;
3. Grade A or B of ASTM A500/A500M-21
Standard Specification for Cold-Formed Welded and Seamless Carbon Steel
Structural Tubing in Rounds and Shapes. This standard is incorporated
by reference as published January 21, 2021, by ASTM International, 100 Barr
Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 and does not
incorporate any subsequent amendments or additions; or
4. ASTM A589-A589M-06 Standard
Specification for Seamless and Welded Carbon Steel Water-Well Pipe.
This standard is incorporated by reference as published October 2, 2018, by
ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
19428-2959 and does not incorporate any subsequent amendments or additions.
Table 3.8 Minimum liner specifications.
|
Material |
Wall thickness (inches) |
Standard dimension ratio (SDR) |
Schedule (SCH) |
|
Steel |
0.188 |
- |
- |
|
Plastic (PVC or ABS only) |
- |
26 |
40 |
(B) Be suspended securely with a hanger or
allowed to rest on bottom of the well;
(C) Be installed so that the top of the liner
terminates within twenty feet (20') of the top of the casing; and
(D) Be able to withstand forces encountered
during installation.
(2)
Packers or liner hangers when used shall be secured-
(A) For plastic liners, with screws that do
not penetrate the inside of the liner; or
(B) For steel liners, with liner hangers
welded or mechanically attached.
(3) Liners are used for three (3) general
purposes. The following additional requirements apply based on the purpose of
the liner:
(A) To hold the well bore open for
any potential collapse or sloughing of loose material-
1. Grout material and packers are optional;
and
2. Manufactured slotted liner,
pipe-based screens, wire-wrapped liners, or manually perforated liners may be
used;
(B) To prevent
rust -
1. The liner shall extend from at least
five feet (5') below the bottom of the casing to within twenty feet (20') of
the top of the casing;
2. Shall
have two (2) packers, with the first packer set within five feet (5') below the
bottom of the casing and the second packer set inside the casing near the
bottom; and
3. Grout material is
optional; and
(C) To
seal out undesirable conditions or to correct inadequate casing seals -
1. Have a minimum annular space of one-half
inch (1/2"); and
2. Have a minimum
of two (2) packers installed at a depth that is appropriate for adequate
sealing against a smooth section of borehole and is supportive of the grout
column above;
3. Have packers placed
a maximum of ten feet (10') apart;
4. Use one (1) of the following grout
materials:
A. Cement slurry; or
B. Coated bentonite pellets; or
C. Other grout materials upon receiving
advanced written approval by the department;
5. Use one (1) of the following grout
methods:
A. Gravity; or
B. Tremie; or
C. Other methods upon receiving advanced
written approval by the department; and
6. Have a minimum thirty-foot (30') annular
seal placed above the packers using specifications provided in Table 3.9; and
Table 3.9 Minimum number of bags of grout to achieve an annular grout seal of thirty feet (30') for lining water wells.
|
Borehole Diameter (inches) |
||||||
|
6 |
8 |
10 |
6 |
8 |
10 |
|
|
Outer Diameter of Liner (inches) |
||||||
|
Type of Grout |
41/2" |
41/2" |
41/2" |
5" |
5" |
5" |
|
CEMENT |
||||||
|
Portland Type I |
2.2 |
6.1 |
11.2 |
1.5 |
5.5 |
10.5 |
|
Portland Type II |
2.2 |
6.1 |
11.2 |
1.5 |
5.5 |
10.5 |
|
BENTONITE |
||||||
|
Pellets |
||||||
|
1/2" Baroid Pellets |
3.5 |
9.7 |
17.8 |
2.5 |
8.7 |
16.7 |
|
3/8" Baroid Pellets |
3.7 |
10.3 |
18.7 |
2.6 |
9.2 |
17.6 |
|
1/4" Baroid Pellets |
3.7 |
10.2 |
18.6 |
2.6 |
9.1 |
17.5 |
|
Wyo-bend Tablets |
3.9 |
10.8 |
19.7 |
2.7 |
9.6 |
18.5 |
|
Volclay 1/2" |
3.9 |
10.9 |
19.9 |
2.7 |
9.7 |
18.7 |
|
Volclay 3/8" |
4.1 |
11.3 |
20.6 |
2.8 |
10.1 |
19.3 |
|
Volclay 1/4" |
4.2 |
11.6 |
21.2 |
2.9 |
10.4 |
20.0 |
7.
Have the top of the liner extend to within twenty feet (20') of the top of
casing; and
8. When used to correct
inadequate casing seals, place the top packer twenty-five feet (25') below the
bottom of the casing. Emplace grout material from above the top packer to a
minimum of five feet (5') into the casing for a total of thirty feet (30') of
grout.
(4)
PVC or ABS liners are prohibited when known gasoline or solvent contamination
exists within three hundred feet (300') of the well being repaired or
drilled.
(5) It is the
responsibility of the permittee to ensure the annulus between the borehole and
liner is sealed for a period of three (3) years from the date the well
construction or reconstruction is approved by the department, unless it can be
proven that the annular seal has been damaged by another person. This applies
to wells where the liner is installed to seal out undesirable conditions,
correct inadequate grout seals of the casing annulus, and/or any other issue
associated with the well casing.
Notes
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