Separate the symptoms
An outlet blockage or failed dosing pump can mimic field failure. Review the tank and flow delivery too.
Repair distribution where suitable
A broken line or distribution problem may be repairable when the soil treatment area remains serviceable.
Understand the soil limit
Caliche, rock, seasonal saturation and an exhausted treatment area can limit repair. Pumping or aeration is not a guaranteed cure.
Confirm county review
Describe the proposed repair to Pima County before excavation. The required authorization depends on what is being changed.
Compare repair and replacement
Ask what remains in service, what work will change and how the proposed solution addresses the cause.
