(a) Applicability.

1. (1) Each facility shall develop and maintain a method of survey control as a means of ensuring and documenting that the facility is developed in accordance with the permit drawings.
2. (2) Specifically, the site shall develop a grid coordinate system that will allow facility features to be located in a three-dimensional manner.
3. (3) The grid system shall be developed in accordance with the following guidelines.

(b) Survey control requirements.

1. (1) The grid system may be developed using assumed and not "true" reference directions, (for example, true north, mean sea level, etc.), if it is more convenient and workable.
2. (2) If assumed directions or elevations are used, then there should be some positive means developed to relate the site grid to an established grid coordinate system such as the State Plane Coordinate System or the Transverse Mercator System and to mean sea level.

(c) Benchmarks.

1. (1) At least three (3) permanent points will be established from which the site grid can be referenced.

2. (2)

   1. (A) Each permanent point must be located in areas where they are not likely to be disturbed.
   2. (B) In the event that they are disturbed, then they shall be immediately reestablished and the Division of Environmental Quality shall be notified.
3. (3) The grid, grid coordinate system, and reference points shall be shown on all permit drawings, cell as-built drawings, and any modification submittals made to the division.

(d) Grid markers.

1. (1) Grid markers shall be established at positions to allow visual inspection of the progression of the fill and other features.
2. (2) The markers shall be mounted on steel posts, brightly painted, and placed in areas where they are not likely to be damaged or destroyed.
3. (3) Markers shall be identified consistent with permit drawing notations.

(e) Landfill feature location.

1. (1) Prominent landfill features shall be located and referenced to the approved site grid.

2. (2) At a minimum, the prominent features include:

   1. (A) Property boundaries or corners;
   2. (B) Monitoring wells and piezometers;
   3. (C) Leachate risers, manholes, and collection piping;
   4. (D) Limits of refuse placement and perimeter of flexible membrane liner;
   5. (E) Liner and cap top and bottom;
   6. (F) Point source discharges;
   7. (G) Gas monitoring facilities;
   8. (H) Utility lines within fifty feet (50’) of the disposal area; and
   9. (I) Other features deemed significant by the operator or the division.