Amend CSSB 1591, Section 5.123, by adding a new subsection (c) to read as follows and renumbering the subsequent subsections accordingly: (c) The commission shall require each applicant who proposes to control or abate pollution by an alternative method or by applying an alternative standard to demonstrate conclusively that the alternative method or standard will achieve the level of protection of the environment and the public health that is required by Subsection (a)(1) of this section.