member is responsible

The QCN member is responsible for meeting all applicable codes pertaining to the location of boreholes and trenches. ⇒ Pipes for headers and manifolds pipes shall be at least 2 feet below the ground surface. ⇒ Pond loop installations that meet the requirements of the heat pump manufacturer are acceptable. − Horizontal Earth Coils (Excluding Header and Slinky Framework) ⇒ The average depth of any horizontal coil circuit shall be a minimum of 4 feet below the ground surface. ⇒ The average separation between earth coil trenches shall be at least 5 feet. ⇒ All entrenched piping shall be thoroughly backfilled to ensure complete soil contact with the pipe. Trenching residue consisting of a fine, granular material is suitable for backfilling. However, if large clumps of soil or rock are present, the piping must be surrounded with 4 inches of fine soil or equal. The unsuitable trench residue can then be used to fill the remainder of the trench. − Vertical Earth Coils (Excluding Headers) ⇒ Vertical boreholes shall be drilled and backfilled with grout as specified in the "Grouting Procedures for Ground Source Heat Pump Systems" by Oklahoma State University. ⇒ Vertical boreholes shall be separated at least 10 feet if bores are in a single row. For boreholes in a grid pattern, a minimum center spacing of 20 feet is required. − Piping Material and Fusing ⇒ Only polybutylene or high-density polyethylene pipe, as specified by the heat pump manufacturer, shall be used for earth coupled heat pump earth coils