Utah Admin. Code R317-4-8 - Final Inspections

(1) The regulatory authority shall inspect the entire installation before backfilling to determine compliance with this rule. Some components or system types require additional testing or inspection methods as outlined in the following.

(a) Each tank shall be tested for water tightness before backfilling.

(i) Each tank shall be filled 24 hours before the inspection to allow stabilization of the water level. Considering water absorption by the concrete, there may not be a change in the water level nor any water moving visibly into or out of the tank. Testing shall be supervised by the regulatory authority. Tanks exhibiting obvious defects or leaks may not be approved unless such deficiencies are repaired to the satisfaction of the regulatory authority.

(A) The regulatory authority may allow two piece tanks, with the joint below the water level, to be backfilled up to 3 inches below the joint to provide adequate support to the seam of the tank.

(B) Any polyethylene or fiberglass tank may be backfilled as per manufacturers' recommendations.

(ii) If ground water elevations inhibit the ability to visibly inspect the exterior of the tank, the tank may be tested by its ability to exclude water.

(b) Each distribution or drop box should be installed level and the flow distribution lines shall be checked by filling the box with water up to the outlets.

(c) Any pump, controls, or alarms shall have its correct operation verified.

(d) Any deep wall trench or seepage pit shall have the depth of the trench excavation verified.

(e) For each at-grade or mound system:

(i) the preparation of the original ground before the placement of fill shall be verified; and

(ii) the final cover shall meet requirements.

(f) For each alternative or experimental system, additional inspections shall be dictated by the complexity of the system and absorption system type as identified by the regulatory authority.

(g) Final approval shall be issued by the regulatory authority before operation of any system, and shall include an as-built drawing of the completed system.

Notes

Utah Admin. Code R317-4-8

Amended by Utah State Bulletin Number 2023-14, effective 6/29/2023