Chapter 5 - Quality Assurance & Quality Control
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General Practice

Minimum System Requirements

At a minimum, radon mitigation systems must meet the following requirements:

  • Must conform to applicable building codes
  • Must maintain the function and operation of all existing equipment and building features, including doors, windows, access panels, etc.
  • Must be compliant with the Standard or the local or state codes which take precedence.
  • System components added, replaced, repaired, or altered to existing systems must be in compliance with the standard. Existing system components that are not repaired, replaced, or altered but are observed to be noncompliant with the standard must be reported to the client in writing referencing relevant sections of this practice.

Health, Safety, & Economic Considerations

Radon mitigation systems, specifically Active Soil Depressurization systems must be designed with great consideration to the health and safety of the building’s occupants. Think about it: these systems draw radon gas and RDPs from below the slab where levels are likely to be exponentially higher than the indoor air. For this reason, all ASD systems should be designed to prevent back drafting from the fan housing or vent pipe system into the conditioned space of the building envelope. In addition to radon, other dangerous or flammable soil gases exist such as methane, the greatest problem for buildings situated on or near landfills. Pesticide residue can also be vaporized especially in highly concentrated areas such as buildings situated on land previously used for farming.

Prior to starting any mitigation work, radon contractors should do the following in due diligence to protect the client’s health, safety, and economic well-being:

  • Inform the client of the nature of work to be done.
  • Review any radon test data to assess the need for radon mitigation.
  • Take steps to anticipate and prevent hazardous situations.
  • Inform the client of the of the anticipated use of any potentially hazardous solvents or other materials and of the need to ventilate work areas during and after the use of such materials as recommended by the manufacturer of the material.

Perform a thorough building investigation and diagnostic tests necessary to minimize expense and ensure efficiency.