Ariz. Admin. Code § 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.
Notes
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