Upon completing the radon mitigation project, I conducted a thorough assessment of the indoor air quality. Utilizing advanced radon detection equipment, I identified the specific areas with elevated radon levels. Following industry best practices, I installed a state-of-the-art sub-slab depressurization system, ensuring effective extraction of radon gas from beneath the foundation. Post-installation, I performed multiple tests to confirm the system's efficiency. The results showed a significant reduction in radon levels, now safely within the 1-2 range. This meticulous approach guarantees a healthier living environment and peace of mind for the residents.