Texas Administrative Code
Title 30 - ENVIRONMENTAL QUALITY
Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
Chapter 331 - UNDERGROUND INJECTION CONTROL
Subchapter O - ADDITIONAL REQUIREMENTS FOR CLASS V INJECTION WELLS ASSOCIATED WITH AQUIFER RECHARGE PROJECTS
Section 331.264 - Construction and Closure Standards
Current through Reg. 50, No. 13; March 28, 2025
All Class V aquifer recharge (AR) injection wells shall be designed, constructed, completed, and closed to prevent commingling, through the wellbore and casing, of injection waters with other fluids outside of the authorized injection zone; mixing through the wellbore and casing of fluids from aquifers of substantively different water quality; and infiltration through the wellbore and casing of water from the surface into groundwater zones.
(1) Plans and specifications. Except as specifically required in the terms of the Class V AR injection well authorization, the drilling and completion of a Class V AR injection well shall be done in accordance with the requirements of § 331.132 of this title (relating to Construction Standards) and the closure of a Class V AR injection well shall be done in accordance with the requirements of § 331.133 of this title (relating to Closure Standards for Injection Wells).
(2) Construction materials. Casing materials for Class V AR injection wells shall be constructed of materials resistant to corrosion.
(3) Construction and workover supervision. All phases of any AR injection well construction, workover or closure shall be supervised by qualified individuals who are knowledgeable and experienced in practical drilling engineering, as applicable, and who are familiar with the special conditions and requirements of injection well and water well construction.