(a) General.

1. (1) In establishing the location of a well, the constructor shall consider sources of contamination that exist on or adjacent to the premises where the well is to be located.

2. (2) As far as possible, the well shall:

   1. (A) Be located on ground that is higher than sources of contamination; and
   2. (B) Have ready access for:

(i) Repairs;

1. (ii) Maintenance;

   1. (iii) Treatment; and

      1. (iv) Inspection.

(b) Relation to sources of contamination.

1. (1) Determination of minimum lateral distances to locate a well from potential sources of contamination involves evaluation of the:

   1. (A) Character and location of the sources of contamination;
   2. (B) Types of geologic formations present;
   3. (C) Depth to the aquifer;
   4. (D) Effect on ground water movement by well pumping; and
   5. (E) Possibilities of flooding of the site by surface waters.
2. (2) Based on practice and experience, accepted minimum lateral distances for some common sources of pollution with respect to a well have been established.
3. (3) The lack of specific distances for other possible sources of contamination such as streams, refuse disposal sites, excavations, waste treatment facilities, buried oil and gasoline storage tanks, improperly constructed wells and cisterns, etc., does not minimize their potential hazard.

4. (4) These must be evaluated in each situation and a distance arrived at based on the pertinent facts.

   1. (c) Minimum lateral distances.
5. (1) The following minimum lateral distances shall apply for common sources of contamination listed:

   Potential sources of contamination	Minimum lateral distances for clay and loam soils
   Cess Pools	100 Feet
   Leaching Pit	100 Feet
   Pit Privy	100 Feet
   Subsurface Seepage Tile	100 Feet
   Manure Piles	100 Feet
   Septic Tank	100 Feet
   Sewers (Cast iron with water tight, leaded or mechanical joints)	50 Feet
   Footing Drains (No connection to a sewer or a sump handling sewage)	10 Feet
   Pump House Floor Drain (Cast iron with water tight joints and having free fall discharge to ground surface)	2 Feet

6. (2) When the upper formations are more pervious, the lateral distances shall be increased (i.e., double the distance for highly pervious gravel formations).

   1. (d) Flood water.
7. (1) Locations subject to flooding should be avoided.
8. (2) If no reasonable alternate site exists, wells may be constructed in flood zones providing special protective construction is included.

(e) Vertical closed loop systems/wells.

1. (1) Vertical closed loop systems and wells shall not be located closer than fifty feet (50’) to:

   1. (A) A septic tank;
   2. (B) Its field lines; or
   3. (C) Other water supply wells used for human consumption.
2. (2) This requirement may be waived.
3. (3) An approved waiver may be requested by contacting the Arkansas Natural Resources Commission office by telephone or mail.
4. (4) Written approval must be obtained from the commission prior to construction of the well.

(g) Industrial and irrigation wells.

1. (1) No industrial or irrigation well shall be located nearer than one hundred feet (100’) to any other well producing potable water.
2. (2) It is recommended that locations subject to flooding be avoided.
3. (3) If no reasonable alternate exists, wells should be constructed with the casing terminating two feet (2’) above the maximum known flood water elevation.

(h) Relations to buildings. With respect to buildings, the location of a well shall be as follows:

1. (1) Adjacent to building.

   1. (A) When a well must be located adjacent to a building, it shall be located so that the center line of the well extended vertically will clear any projection from the building by not less than ten feet (10’).
   2. (B) The well shall also be located at least ten feet (10’) away from any power lines; and

2. (2) Inside building.

   1. (A) The casing top of a well and any other opening shall not terminate in the basement of any building, or in any pit, room, or space that is below ground surface or connected to a basement, which is not properly drained or pumped.
   2. (B) Where it is necessary to seal out seep water or rain water in small diameter wells that are underground, National Ground Water Association-approved pitless adapters, or an approved seal, shall be used.