Texas Health and Safety Code - HEALTH & SAFETY § 382.021. Sampling Methods and Procedures

(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.

(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.