If the radon level of a home is 4 picocuries per liter or greater, the EPA recommends installing a radon mitigation system (sometimes called radon remediation). Radon Mitigation Portland-Radon Mitigation Portland has some nice tips on this.
One common method used to lower radon levels is “sub-slab depressurization.” A suction point or points are established in this case, and a pipe is inserted through the concrete slab floor. This pipe is connected to other PVC piping, and a ventilator is placed outside the living area on the pipe. The fan then pulls the radon gas from under the house and sends it outwards. A program to reduce radon could cost from $900-$2500.
Selecting a Service to Minimize
Your best choice for implementing a radon mitigation system is a reputable mitigation company.
In many states, a State regulatory agency such as the DEP (Department of Environmental Protection) certifies these companies or individuals. If that is not valid in your area, you can search for a professional mitigator approved by NEHA (National Association for Environmental Health). If considering a radon mitigation service, whether they offer free estimates, you can ask for their state or NEHA certification number, and a guarantee on the program.
Usually, the mitigation company would inspect the home to assess the system’s optimal design and the fan scale for the form of base on which the house is constructed. A cost estimate can then be calculated for a program. Once the contractor has been chosen, plan installation on 1-2 days.
As always, watch out for the lowest bidder.
Check for references, examples of jobs and how long the contractor has been in business.
Live Upon Mitigating Radon
Following installation it is recommended that a radon mitigation system be tested. A study can be carried out after 24 hours or more of the device having been in service. In the initial evaluation normally a short-term procedure is used. For certain instances, the contractor’s calculation may require a retest by a specialist company or check kits on radon.
Every year a follow-up check is recommended to track the continuing success of the program.