What are Normal Radon Levels After Mitigation?

 Radon Levels After Mitigation 


What are Normal Radon Levels After Mitigation?

Callaway and Associates, Inc. discusses different radon mitigation techniques and the normal radon levels after performing such methods. If you find elevated levels of radon (greater than 4 picocuries per liter or air (pCi/L)) after radon testing, then you need to take action and allow your home to undergo mitigation strategies to solve the problem. As the second leading cause of lung cancer, radon is a harmful gas that must be removed from your premises. The US Surgeon General and the Environmental Protection Agency (EPA) highly recommend radon inspection in homes and reducing radon levels for those identified to have high levels of the dangerous gas. Fixing your home is a must, as radon is radioactive and can effectively damage lung tissues, which can subsequently cause lung cancer.




Radon Mitigation TechniquesRadon Mitigation Techniques and Reduced Levels

Soil Suction

There are several methods that can be applied for radon mitigation. These techniques generally do two things. First, they lower elevated radon levels that have already entered your home. Second, they prevent radon from entering a home further. The EPA generally suggests performing both tasks to decrease radon levels of a home but strongly recommends the second one to maintain the reduced levels.


An example of a prevention method is soil suction, which draws radon from below the home, vents it through a piping system, and directs it to the air above where dilution can happen. This process is performed when elevated levels of radon are immediately found in a soil during testing. The test involves soil communication, where a vacuum cleaner and chemical smoke are used to show the manner in which air flows from one point to another under a foundation.


Sub-slab Depressurization

Sub-slab depressurization is the most commonly used radon reduction method and is usually the most reliable. About 50-99% of the radon are typically removed after this process. This process works best if the air can move easily in the material under the slab. In this process, suction pipes are inserted through the floor slab into the crushed rock or soil underneath. Pipes then direct the air with radon to the air above to be diluted.


Passive Sub-slab Suction

This method reduces radon levels by 30-70%. It is more effective in cold climates but not as effective as sub-slab depressurization. This method depends on natural pressure differentials and air currents rather than a fan to take radon up from below a structure. It is used with radon-resistant characteristics that are set up in newly built houses.


Other Methods and Their Radon Reduction Levels

Other radon mitigation methods include draintile suction, block-wall suction, sump-hole suction, and sub-membrane depressurization, which all reduce radon by 50-99%. Basement pressurization also reduces radon by 50-99%, working best with sealed basements that are isolated from the outdoors and upper floors. Natural ventilation can reduce radon levels by 0-50%, which means that it is not a very effective method, that is, depending on the ventilation condition of an area, sometimes it works and sometimes it only removes half of the radon in a home.


Radon reduction in private well water systems is more effective than in the air because water is less viscous than air. For aeration, 95-99% of the radon can be reduced. For granular activated carbon (GAC), 85-95% of radon can be removed. Aeration requires annual cleaning of the well to maintain effectiveness and prevent contamination, whereas GAC is used for moderate levels of radon in water or about 5000 pCi/L.


Radon Inspection ExpertsRadon Experts 

Before radon mitigation is the process of inspection to accurately determine the levels of radon in a home. Callaway and Associates, Inc. are radon inspection experts who can help you test your home for dangerous levels of radon. When you call us to inspect your home, we guarantee quick and precise results so that you can take appropriate action when needed. Get in touch with us today to test your home or building for this harmful gas.


Professional Radon Detection - Callaway and Associates, Inc.