During the plumbing maintenance, I thoroughly inspected the existing tank and determined it was best not to flush it due to its age and condition. I recommended replacing the tank to ensure optimal performance and longevity. Additionally, I conducted a radon reading as part of the comprehensive service. The results indicated extremely high radon levels, which prompted the customer to request an estimate for a mitigation system. I provided detailed information on the necessary steps and equipment required to effectively reduce the radon levels, ensuring a safer living environment.