As shown on the image above, the EPA recommends testing of all homes, as elevated levels can occur in all radon zones. Grand Home Inspection LLC is certified for radon testing and follows EPA procedures for radon monitoring as part of a real estate transaction. We will leave a tamper resistant continuous radon monitor in the subject home for a minimum of 48 hours, though we recommend 60 to ensure proper building conditions are met 12 hours before the 48 hour testing begins. Grand Home Inspection LLC understands that the clock is ticking on all real estate transactions, and wish radon tests could be shorter, but anybody promising results in under 48 hours is risking inaccurate measurements. We like to be as responsive and offer the fastest turnaround time possible, which is why we have invested in specialized testing equipment that can provide results immediately after the 48 hour period is over, instead of using cheap tests kits many inspectors use that must be sent in for lab analysis and add days to the turnaround time.