(a) An owner is required to have an engineer design a collection system or wastewater treatment facility that meets the minimum requirements of this chapter. The executive director may determine that additional requirements are needed.     
      (b) An owner is required to construct a collection system or wastewater treatment facility according to the plans and specifications approved by the executive director or an approved review authority, as designated by §217.8 of this title (relating to Municipality Reviews) or §217.9 of this title (relating to Texas Water Development Board Reviews).     
      (c) The executive director's approval of plans and specifications of a wastewater treatment facility does not relieve an owner of the responsibility to obtain a wastewater permit or other authorization from the commission in accordance with Texas Water Code, Chapter 26.     
      (d) The commission's approval of a wastewater permit does not relieve an owner of the responsibility to obtain plans and specifications approval for a wastewater treatment facility and the associated collection system from the executive director in accordance with this chapter.     
      (e) An owner must ensure that its wastewater treatment facility plans and specifications meet all requirements in the associated wastewater permit.     
      (f) The executive director's approval of plans and specifications must be in writing, unless the project is approved through the automatic approval processes in §217.6(f) or (h) of this title (relating to Submittal Requirements and Review Process).     
      (g) Plans and specifications for a project that would alter an existing treatment unit or collection system unit must comply with the requirements of this chapter. The plans and specifications do not need to address existing treatment units or collection system units that will not be altered, unless specifically required by this chapter or requested in writing by the executive director.     
      (h) The executive director may require more stringent design criteria of a collection system or wastewater treatment facility if the executive director determines it is necessary to protect public health or to meet water quality standards established by the commission.     
     Source Note:        The provisions of this §217.5 adopted to be effective August 28, 2008, 33 TexReg 6843; amended to be effective December 4, 2015, 40 TexReg 8254