Please view the following attached resource entitled "Follow-Up of New Jersey Homes Mitigated for Radon - Phase 2"
Abstract:
A variety of techniques to reduce indoor radon levels have been developed and are commonly used by professional radon mitigators and the do-it-yourself homeowner. This project was designed to investigate radon mitigation systems that have been installed in homes in New Jersey, with the objectives of identifying causes of system failure or success, and transferring that knowledge to the private and public sectors.
To reach the objectives, Building Research Associates, (BRA), working under the "Follow-up of New Jersey Homes Mitigated for Radon - Phase I" project, investigated 100 homes across New Jersey that had been mitigated for radon. That project identified several deficiencies in the mitigation systems that were suspected to be the cause of a system's failure to maintain radon concentrations below the 4.0 pCih level.
This project, the "Follow-up of New Jersey Homes Mitigated for Radon - Phase 2" project, involved modifying the mitigation systems in 15 homes to correct the identified deficiencies. Long-term radon measurements were made after the modifications to determine their effectiveness. This document is the final report describing the results of Phase 2. This document also contains information that was to be included in a separate addendum report.