Authority: IC 13-14-8; IC 13-15-1-2; IC 13-15-2-1; IC 13-18-3-1; IC 13-18-4-1

Affected: IC 13-11-2; IC 13-13-5-1; IC 13-18-2

Sec. 16. (a) A drinking water production well casing shall meet the following requirements:

1. (1) A steel or stainless steel casing is required for the following:

   1. (A) A community public water system.
   2. (B) A public water system production well casing with an inside diameter greater than six (6) inches.

2. (2) Steel or stainless steel shall meet the following:

   1. (A) Schedule 40 if the casing is less than or equal to ten (10) inches in diameter.
   2. (B) Be at least three hundred seventy-five thousandths (0.375) of an inch in thickness if the casing is greater than ten (10) inches in diameter.

3. (3) Steel or stainless steel pipe used in a well casing shall be joined by:

   1. (A) threading and the use of screwed couplings; or
   2. (B) welding with full circumference welds.

4. (4) A production well not regulated under subdivision (1) may be equipped with a polyvinyl chloride (PVC) well casing when all of the following are met:

   1. (A) The production well is not located within two hundred (200) feet of:

      1. (i) stored or staged petroleum products; or
      2. (ii) any known sources of volatile or semivolatile organic contaminants.
   2. (B) The PVC casing is joined by solvent welding or mechanical joints that use PVC locking strips and synthetic watertight sealing gaskets.
   3. (C) The PVC well casing and joints meet the requirements of ANSI/ASTM F480-02 "Standard Specification for Thermoplastic Well Casing Pipe and Couplings made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80"*.
   4. (D) The minimum wall thickness of PVC casing is at least the equivalent of SDR 21 according to ANSI/ASTM F480-02 for "Standard Specification for Thermoplastic Well Casing Pipe and Couplings made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80"*.

   5. (E) PVC casing shall be protected from damage from collision in accordance with the following:

      1. (i) Three (3) posts shall be placed in an equilateral formation no more than twenty-four (24) inches in radius from the outside edge of the casing.

      2. (ii) The posts specified in item (i) shall:

         1. (AA) be concrete-filled steel posts at least four (4) inches in diameter or hollow steel at least twenty-five hundredths (0.25) of an inch in thickness; and
         2. (BB) extend at least three (3) feet above grade and four (4) feet below grade.

5. (5) A permanent well casing shall terminate as follows:

   1. (A) At the higher level of one (1) of the following:

      1. (i) At least eighteen (18) inches above finished grade.
      2. (ii) At least thirty-six (36) inches above the regulatory flood elevation if located in a designated flood hazard area identified by the Federal Emergency Management Agency (FEMA).
   2. (B) At least twelve (12) inches above the pump house floor or concrete apron.

(b) The casing shall be vented to the atmosphere with a vent that terminates in a downturned position at or above the top of the casing or the pitless adapter unit. The vent shall have a minimum one and one-half (11/2) inch diameter opening covered with a twenty-four (24) mesh, noncorrodible screen.

(c) A production well shall meet the following construction requirements:

1. (1) Have a maximum deviation from plumb not in excess of two-thirds (2/3) of the inside diameter of the well casing per one hundred (100) feet of well depth.

2. (2) Be aligned to permit proper operation of the type of permanent pump intended for the well. Alignment shall be tested as follows:

   1. (A) By lowering into the well, through its entire depth, a section of pipe forty (40) feet long or a dummy of the same length.

   2. (B) The pipe or dummy used as specified by clause (A) shall be in accordance with the following:

      1. (i) One-half (1/2) inch less in diameter than the inside diameter of the part of the casing or hole being tested when the casing or hole diameter is ten (10) inches or less.
      2. (ii) One (1) inch smaller than the inside diameter when that part of the casing or hole being tested is greater than ten (10) inches.
   3. (C) An alignment test shall not be required inside well screens.

(d) A production well completed in an unconsolidated formation shall have screens installed and constructed of one (1) of the following materials:

1. (1) Stainless steel.
2. (2) PVC only if the casing material is also PVC.

(e) A production well casing shall be fitted to permit measurements of static and pumping water levels.

(f) A production well in an unconsolidated formation shall be packed with silica gravel if it has artificial gravel wall filters.

(g) The well house floor shall be at least six (6) inches above grade.

*This document is incorporated by reference. Notwithstanding language to the contrary in the primarily incorporated documents, the versions of all secondarily incorporated documents, which are those documents referred to in the primarily incorporated documents, shall be the versions in effect on the date of final adoption of this rule. Copies of this standard may be obtained from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103 or from the Indiana Department of Environmental Management, Office of Water Quality, Indiana Government Center-North, 100 North Senate Avenue, Room N1255, Indianapolis, Indiana 46204.

(Water Pollution Control Division; 327 IAC 8-3.4-16; filed Jun 17, 1999, 1:50 p.m.: 22 IR 3374; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR 1518; errata filed Feb 6, 2006, 11:15 a.m.: 29 IR 1937; filed Apr 24, 2006, 3:00 p.m.: 29 IR 2966; readopted filed Nov 21, 2007, 1:16 p.m.: 20071219-IR-327070553BFA; readopted filed Jul 29, 2013, 9:21 a.m.: 20130828-IR-327130176BFA; readopted filed Jun 14, 2019, 1:59 p.m.: 20190710-IR-327190246BFA; readopted filed Oct 18, 2024, 1:57 p.m.: 20241113-IR-327230810RFA)