Under which condition can repair permits be issued?

Repair permits are specifically designed to address existing failures in septic systems. When a septic system malfunctions, it can lead to environmental hazards, health risks, and regulatory concerns. The issuance of a repair permit allows for the necessary modifications or replacements to bring a failing system back into compliance with health and safety standards. This ensures that the issues causing the failure are properly addressed and mitigated, thereby protecting public health and the environment.

The other options do not apply as they focus on conditions that do not directly relate to repairing an existing failure. A complete new system would require a different set of permits, and meeting soil suitability and field length requirements is more relevant for new installations rather than repairs. Additionally, the potential for future development does not justify the immediate need for repairs, as the priority should be on addressing the current issues present in the septic system.