Section 355IAC2-5-8. Exemptions

   (a) A liner need not be installed directly under a storage container having a capacity of one hundred thousand (100,000) gallons or more that has been constructed on-site and put into use before July 6, 1991, provided that one (1) of the following alternative procedures are complied with, certified to in writing by an official of the company who owns the container, and the certificate is filed with the state chemist:

(1) Alternative 1 shall be as follows:

(A) A second bottom made of steel shall be constructed for the storage container and placed over the original bottom and a layer of smooth, fine gravel or coarse sand having a minimum thickness of six (6) inches.

(B) The original bottom of the storage container shall be tested for leaks before the sand layer or second bottom is installed. A record of the test shall be kept on file at the storage facility.

(C) The newly constructed bottom shall be tested for leaks before any fluid fertilizer is stored on the newly constructed bottom. A record of the test shall be kept on file at the storage facility or at the nearest local office from which the storage facility is administered.

(D) There shall be a method by which leaks from the newly constructed bottom into the sand layer may readily be detected.

(E) The newly constructed bottom shall be tested at least once every five (5) years for leaks. A record of the tests shall be kept at the storage facility.

(2) Alternative 2 shall be as follows:

(A) The container shall be emptied, cleaned, and tested for leaks. The walls and floor of the container shall be tested to assure that welds and thickness of steel plates are sound and adequate to contain the fertilizers. A record of the inspection, test results, and any repairs made shall be submitted to the state chemist and maintained by the owner or operator.

(B) The interior floor and at least twelve (12) inches of the wall areas of the container above the floor shall be coated with an approved liner to inhibit corrosion. A record of this procedure shall be submitted to the state chemist and maintained by the owner or operator.

(C) An approved test for leaks shall be conducted every five (5) years thereafter. A record of the test findings and indicated repairs and maintenance shall be maintained by the owner or operator.

(3) Alternative 3 shall be as follows:

(A) Monitoring devices shall be installed in angled borings in the unsaturated earth materials under each tank. These monitoring devices shall constitute a leak detection system for each tank in advance of the point at which any leak would reach ground water.

(B) The number, length, and depth of each boring shall be determined on the basis of site characteristics. The array of monitoring devices under each tank shall constitute the best practical early warning detection system for tank leakage.

(C) Each monitoring plan under this alternative shall be implemented only upon review and approval of the state chemist.

  (b) The secondary containment requirements under this rule do not apply to rail cars that are periodically moved to and from the storage facility.

  (c) The state chemist may recognize other methods that provide equivalent protection. (State Chemist of the State of Indiana; 355 IAC 2-5-8; filed Mar 8, 1991, 2:45 p.m.: 14 IR 1396, eff one hundred twenty (120) days after filing with secretary of state; errata filed May 10, 1991, 2:30 p.m.: 14 IR 1730; filed Apr 23, 1998, 9:20 a.m.: 21 IR 3363, eff one hundred twenty (120) days after filing with secretary of state; readopted filed Jun 20, 2001, 3:20 p.m.: 24 IR 3822; filed Aug 10, 2005, 1:00 p.m.: 28 IR 3576; readopted filed Apr 27, 2007, 2:03 p.m.: 20070509-IR-355070039RFA; readopted filed Nov 13, 2013, 10:42 a.m.: 20131211-IR-355130442RFA)