1. (1) Community and NTNC water supply wells shall be constructed with a protective casing of sufficient size to allow a minimum two-inch annular space between the casing and well hole. This casing shall be of unused steel, which meets requirements from the latest edition of the American Water Works Association Standards or other materials approved by the Department and shall be adaptable to both the stresses of installation and the corrosiveness of water. Joining by either welding or threaded coupling will be accepted. Minimum interior diameter of casing should be two inches larger than the pump bowls. The suction for the pump shall not be placed below or in the screens. Casings for wells in all formations shall extend to the immediate vicinity of the water bearing formation unless specifically approved by the Department. This casing shall be centered and project at least l2 inches above the finished concrete slab around the well. The concrete slab shall have the minimum dimensions of 3 feet by 3 feet.
2. (2) Non-community water supply well casing materials shall be as indicated above or may be PVC thermoplastic water well casing produced in accordance with ASTM Standard F480-76 and approved for potable water by the NSF.

Author: Joe Alan Power, Edgar K. Hughes, Dennis D. Harrison

Statutory Authority: Code of Ala. 1975, §§22-23-1 through 22-24-12. History: May 23, 1977. Repealed and Readopted: January 4, 1989; October 31, 1990; effective December 5, 1990. Amended: Filed November 28, 1995; effective January 2, 1996. (Rule was renumbered from .04 to .06). Amended: Filed December 21, 1998; effective January 25, 1999. (Rule was renumbered from .06 to .12.) Amended: Filed April 25, 2003; effective May 30, 2003. Amended: Filed November 7, 2005; effective December 12, 2005. Amended: Filed June 21, 2016; effective August 5, 2016. Ed. Note: Rule 335-7-5-.12 was renumber to .04 and original Rule 335-7-5-.04, Source Water Assessment Program For Groundwater Systems, was repealed as per certification filed November 7, 2005; effective December 12, 2005. See attached history:

Editor’s Note: Rule 335-7-5-.12 was renumber to .04 and original Rule 335-7-5-.04, Source Water Assessment Program For Groundwater Systems, was repealed as per certification filed November 7, 2005; effective December 12, 2005. See attached history: History: New Rule: Filed November 28, 1995; effective January 2, 1996. Repealed and Replaced: Filed December 21, 1998; effective January 25, 1999. Repealed: Filed November 7, 2005; effective December 12, 2005.

History: May 23, 1977. Repealed and Readopted: January 4, 1989; October 31, 1990; effective December 5, 1990. Amended: Filed November 28, 1995; effective January 2, 1996. (Rule was renumbered from .04 to .06). Amended: Filed December 21, 1998; effective January 25, 1999. (Rule was renumbered from .06 to .12.) Amended: Filed April 25, 2003; effective May 30, 2003. Amended: Filed November 7, 2005; effective December 12, 2005. Amended: Filed June 21, 2016; effective August 5, 2016. Ed. Note: Rule 335-7-5-.12 was renumber to .04 and original Rule 335-7-5-.04, Source Water Assessment Program For Groundwater Systems, was repealed as per certification filed November 7, 2005; effective December 12, 2005. See attached New Rule: Filed November 28, 1995; effective January 2, 1996. Repealed and Replaced: Filed December 21, 1998; effective January 25, 1999. Repealed: Filed November 7, 2005; effective December 12, 2005.