Exceptions from application of chapter.

This chapter does not apply to: (1) salaried employees performing duties for which they were trained and hired solely within a federal or state governmental agency; (2) persons constructing, opening, or closing wells on their own property; (3) persons constructing, opening, or closing exploration borings; (4) persons licensed as contractors pursuant to Chapter 11 who drill a borehole for measuring groundwater levels, blasting, or short term dewatering for construction purposes.