1. (a) The soil or foundation of an earthen storage structure must have a maximum specific discharge permeability of one-sixteenth (1/16) in3/in2/day, 1.8x10-6cm3/cm2/sec. This requirement may be satisfied by soil testing that shows a minimum of three (3) feet of in situ soils that:

   1. (1) meet the maximum specific discharge permeability criteria;
   2. (2) are over excavated a minimum of six (6) inches; and
   3. (3) are recompacted to break up the existing macropore structure.

2. (b) If there is not at least three (3) feet of in situ soils that meet the maximum specific discharge criteria in subsection (a), a liner must be used. Except for clay liners described in subsection (c), liners used in a storage structure must meet the following design standards as applicable:

   1. (1) Indiana NRCS Conservation Practice Standard Code 521A: POND SEALING OR LINING – GEOMEMBRANE OR GEOSYNTHETIC CLAY LINER, November 2018.
   2. (2) Indiana NRCS Conservation Practice Standard Code 520: POND SEALING OR LINING – COMPACTED SOIL TREATMENT, October 2016.
   3. (3) Indiana NRCS Conservation Practice Standard Code 522: POND SEALING OR LINING – CONCRETE, October 2016.
3. (c) Clay liners must be a minimum of one (1) foot thick and have a maximum specific discharge of one-sixteenth (1/16) in3/in2/day, 1.8x10-6cm3/cm2/sec.

As added by P.L.98-2026, SEC.51.