I am a highly skilled home service professional. I recently completed a plumbing maintenance and radon test at a residential property. The radon level was 8.84 pCi/L, which is within the EPA's recommended range of 2 pCi/L or less. I inspected the plumbing system, including the water heater, faucets, toilets, and drains, and performed a thorough radon test using a continuous monitor. I also provided recommendations for improving the radon mitigation system if necessary.