1. (a) If a pneumatic tightness test is performed on piping pursuant to Env-Or 406.05(b)(2), the test shall be conducted as follows:

   1. (1) Pressurize flexible secondary containment piping at 5 psi and maintain the pressure for a minimum of 10 minutes;
   2. (2) Pressurize nonflexible secondary containment piping at 10 psi and maintain the pressure for a minimum of 10 minutes;
   3. (3) Apply soap solution to all piping joints and other connections; and
   4. (4) Observe the joints and connections for leaks for the duration of the test.
2. (b) The piping shall be backfilled only if no leaks are observed for the duration of the test.
3. (c) All installed secondary containment piping shall be pressurized for a minimum period of 2 hours after the backfill process has been completed.
4. (d) Test results shall be provided to the department at the final site inspection required by Env-Or 407.07(e).
5. (e) The certified tank installer shall remove all testing equipment after the test is completed.
6. (f) Each test gauge used for pneumatic tightness testing shall have an operating range that conforms to the requirements of the test method being used.

Source. (See Revision Note #1 at chapter heading for Env-Or 400) #10393, eff 9-1-13; ss by #12643, eff 10-10-18 (formerly Env-Or 406.23) (See Revision Note #2 at chapter heading for Env-Or 400)