1. (a) Temporary closure of a UST system shall be accomplished by:

   1. (1) Removing all regulated substances from the system so that no more than one inch of residue remains in the tank; and
   2. (2) Equipping each opening or access point, such as fill risers, with a lock to secure against unauthorized use or tampering.
2. (b) All removed substances shall be handled and disposed of in accordance with applicable local, state, and federal requirements.
3. (c) The owner of a temporarily closed system shall comply with the cathodic protection requirements specified in Env-Or 405.12, Env-Or 405.13, and Env-Or 406.10.
4. (d) Within 30 days of meeting the above requirements for temporary closure of a UST system, the owner shall report the change in operational status by submitting an amended registration to the department in accordance with Env-Or 404.01.

5. (e) Any portion of a UST system with secondary containment and leak monitoring that has been temporarily closed for 3 years shall, within 30 days, be:

   1. (1) Reactivated as specified in (f), below;
   2. (2) Allowed to remain in temporary closure provided the conditions specified in (g), below, are met; or
   3. (3) Permanently closed in accordance with Env-Or 408.06 through Env-Or 408.10.

6. (f) A UST system that has been temporarily closed shall not be placed back into service, nor shall a regulated substance be introduced into the system, unless and until the owner complies with and certifies to the department in writing that the system is in compliance with:

   1. (1) Env-Or 404.01 relative to registration;
   2. (2) Env-Or 404.06 relative to permit to operate;
   3. (3) Env-Or 404.12 relative to financial responsibility;
   4. (4) Env-Or 405.05, Env-Or 405.06, Env-Or 406.11, and Env-Or 406.12 relative to spill containment and overfill prevention;
   5. (5) Env-Or 405.08, Env-Or 405.09, Env-Or 406.05 through Env-Or 406.08, Env-Or 406.09, and Env-Or 406.13 relative to leak monitoring systems and tightness testing;
   6. (6) Env-Or 405.12, Env-Or 405.13, and Env-Or 406.10 relative to cathodic protection;
   7. (7) Env-Or 500 relative to stage I/stage II system requirements; and
   8. (8) Env-Or 406.17 relative to primary containment testing.

7. (g) A UST system that has been temporarily closed as specified in (e), above, may remain in temporary closure only if the owner certifies to the department in writing, once every 3 years that the system remains in temporary closure, that the system is in compliance with:

   1. (1) Env-Or 404.01 relative to registration;
   2. (2) Env-Or 404.06 relative to permit to operate;
   3. (3) Env-Or 404.12 relative to financial responsibility;
   4. (4) Env-Or 405.05, Env-Or 405.06, Env-Or 406.11, and Env-Or 406.12 relative to spill containment and overfill prevention;
   5. (5) Env-Or 405.08, Env-Or 405.09, Env-Or 406.05 through Env-Or 406.08, and Env-Or 406.13 relative to leak monitoring systems and tightness testing;
   6. (6) Env-Or 405.12, Env-Or 405.13, and Env-Or 406.10 relative to cathodic protection; and
   7. (7) Env-Or 500 relative to stage I/stage II system requirements, except that regulated substance need not be added in order to conduct a pressure decay test otherwise required by Env-Or 504 or Env-Or 505.

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