Mo. Code Regs. tit. 10 § 23-3.080
Current through Register Vol. 49, No. 20, October 15, 2024
Section 10 CSR 23-3.080 - [Effective until 11/30/2024] LinersPURPOSE: This rule sets guidelines for the use of liners in water wells.
(1) General specifications. All liners shall-(A) Be new and follow minimum specifications in Table 3.8. Used pipe is considered new if it is salvaged within ninety (90) days of the installation of a new water well and is decontaminated. Click to view image
(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 ten feet (10') 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; and2. 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 ten feet (10') of the top of the casing; and2. 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; and3. 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"); and2. Have a minimum of two (2) rubber packers secured below the bottom of the area of concern to be grouted; and3. Have packers placed a maximum of ten feet (10') apart; and4. Use one (1) of the following grout materials:B. Coated bentonite pellets; orC. Other grout materials upon receiving advanced written approval by the department; and5. Use one (1) of the following grout methods:C. Other methods upon receiving advanced written approval by the department; and6. Have a minimum thirty-foot (30') annular seal placed above the packers using specifications provided in Table 3.9; and7. Have the top of the liner extend to within ten feet (10') of the top of casing; and8. 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. Click to view image
(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. AUTHORITY: sections 256.606 and 256.626, RSMo 1994.* Original rule filed April 2, 1987, effective 7/27/1987. Emergency rescission and emergency rule filed Nov. 16, 1993, effective 12/11/1993, expire 4/9/1994. Rescinded and readopted: Filed Aug. 17, 1993, effective 3/10/1994. Amended: Filed July 13, 1994, effective 1/29/1995. Amended: Filed Nov. 1, 1995, effective 6/30/1996. Amended by Missouri Register January 15, 2019/Volume 44, Number 2, effective 2/28/2019*Original authority: 256.606, RSMo 1991 and 256.626, RSMo 1985, amended 1991.