Ariz. Admin. Code § 18-9-J658

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-9-J658 - Class VI; Minimum Criteria for Siting

A. Owners or operators of Class VI wells must demonstrate to the satisfaction of the Director that the wells will be sited in areas with a suitable geologic system. The owners or operators must demonstrate that the geologic system comprises:

1. An injection zone or zones of sufficient areal extent, thickness, porosity, and permeability to receive the total anticipated volume of the carbon dioxide stream.

2. Confining zone or zones free of transmissive faults or fractures and of sufficient areal extent and integrity to contain the injected carbon dioxide stream and displaced formation fluids and allow injection at proposed maximum pressures and volumes without initiating or propagating fractures in the confining zone or zones.

B. The Director may require owners or operators of Class VI wells to identify and characterize additional zones that will impede vertical fluid movement, are free of faults and fractures that may interfere with containment, allow for pressure dissipation, and provide additional opportunities for monitoring, mitigation, and remediation.

Ariz. Admin. Code § R18-9-J658

New Section made by final rulemaking at 28 A.A.R. 1904, effective 9/6/2022.