scope:

This Standard is for the tightness testing of concrete environmental engineering liquid and gaseous containment tanks. The included tests are:

(a) Hydrostatic Test for Open or Covered Tanks, HST. See Chapter 2;

(b) Surcharged Hydrostatic Test for Closed Tanks, SHT. See Chapter 3; 

(c) Pneumatic Test for Closed Tanks, PNT. See Chapter 4; and

(d) Combination Hydrostatic-Pneumatic Test for Closed Tanks, CPT. See Chapter 5.

The tightness testing procedures and requirements contained herein are applicable to reservoirs, basins, and tanks constructed of concrete or a combination of concrete and other materials. The owner shall be permitted to waive certain preparatory items but the waiver of such items shall not change the test criteria.

Each cell of multi-cell tanks shall be considered a single tank and tested individually unless otherwise directed by the engineer.

The HST procedures and requirements herein are also applicable for tightness testing of open concrete liquid transmission structures such as castin- place concrete channels and conduits.

The HST procedures and requirements, where applicable, can be used for tightness testing of concrete paved structures, such as channels and impoundments.

These provisions are not intended for precast concrete structures such as culverts and pipes, for hazardous material primary containment structures, for cryogenic storage structures, or for high-pressure gas tanks.