The director may:
(1) investigate the methods used in the manufacture of drain tile;
(2) determine the causes of drain tile failure; and
(3) conduct research and experimentation to improve the quality of drain tile.
The director may make inspections and tests of manufacturing processes and materials used and the resultant product of a manufacturing plant in the state where drain tile is made and sold to drainage authorities or the general public. The director, or an authorized agent of the director, must have free access to manufacturing plants of drain tile sold in this state for inspections and tests.
The results of inspections and tests must be made public for drainage authorities, engineers, tile manufacturers, and others interested in the use of drain tile.