Radon mitigation performance of SGMs and ARMs was evaluated in five different modes, two of which are active modes supported by a ventilation fan on and the others are passive modes with no fan. The test was performed in a concrete structure consisting of eight partitioned rooms. The bottom side of each room is covered with gravels and radon gas soil sampled at nearby open fields. Then, SGMs and ARMs are installed on top of the soil to block the radon gas. The test is performed for three days in passive modes and for another three days in active modes. Then, the radon concentration is measured with an E-perm monitor. These tests are repeated for three different levels of radon gas concentration in the sample soil, labeled as low (L), medium (M) and high (H). Experimental results present two observations. The first one is that, in accordance with the EPA recommendations, radon mitigating materials make much greater effects when they are used in an active mode. The best result was from A-1 mode (SGM+ARM+fan). For all of L, M and H soil samples, the radon concentration turned out to be the lowest, about 10 % ~ 40 % of 148 Bq/m3, the EPA activation level (EAL). In A-2 mode (SGM+ fan), the concentration was a reasonably fair level, about 25 % ~ 48 % of EAL. The second observation is that the performance of mitigating materials used in passive modes is unreliable. In all of three passive test modes, the radon concentration was higher than the EAL, or just below the EAL.
Radon mitigation, SGM, ARM, EPA, fan
International Journal of Trend in Scientific Research and Development - IJTSRD having
online ISSN 2456-6470. IJTSRD is a leading Open Access, Peer-Reviewed International
Journal which provides rapid publication of your research articles and aims to promote
the theory and practice along with knowledge sharing between researchers, developers,
engineers, students, and practitioners working in and around the world in many areas
like Sciences, Technology, Innovation, Engineering, Agriculture, Management and
many more and it is recommended by all Universities, review articles and short communications
in all subjects. IJTSRD running an International Journal who are proving quality
publication of peer reviewed and refereed international journals from diverse fields
that emphasizes new research, development and their applications. IJTSRD provides
an online access to exchange your research work, technical notes & surveying results
among professionals throughout the world in e-journals. IJTSRD is a fastest growing
and dynamic professional organization. The aim of this organization is to provide
access not only to world class research resources, but through its professionals
aim to bring in a significant transformation in the real of open access journals
and online publishing.