(a) The commission may prescribe the sampling methods and procedures to be used in determining violations of and compliance with the commission's rules, variances, and orders, including:
(1) ambient air sampling;
(2) stack-sampling;
(3) visual observation; or
(4) any other sampling method or procedure generally recognized in the field of air pollution control.
(b) The commission may prescribe new sampling methods and procedures if:
(1) in the commission's judgment, existing methods or procedures are not adequate to meet the needs and objectives of the commission's rules, variances, and orders; and
(2) the scientific applicability of the new methods or procedures can be satisfactorily demonstrated to the commission.