CC-1000_2018

Soil Gas Control Systems ANSI/AARST CC-1000 2018 in New Construction of Buildings 24 13.3 Additional ASD fan considerations An explosion-proof fan as specified by the appropriate codes 18 for appropriateness is required when evaluations of the chemical(s) or substances of concern indicate that gasses passing through the fan could result in a fire, explosion or serious personal injury to workers and building occupants. Informative note— Most inline fans commonly used for radon reduction are not rated as explosion proof 18 . 13.4 Sealant material considerations. An evaluation of the sealant products used shall be made prior to installation in order to avoid sealant products that are known to have long curing periods or contain constituent chemicals identified for mitigation. 13.5 Soil gas retarder materials. An evaluation shall be made prior to installation for the known chemical(s) of concern and the manufacturer’s guidance on soil gas retarder materials to help ensure degradation of the material will not occur over time. For situations where the purpose of the membrane is to help prevent liquids or gases from passing through membrane materials, less permeable products than specified in Section 6.4 (Materials and installation for all soil gas retarders) shall be considered. 13.6 System monitors. In addition to all requirements of Section 10.3.6 Fan Monitors , an evaluation shall be made prior to installation for situations where chemical hazards are present, such as those associated with immediate or short-term acute risk that could warrant additional monitoring such as: a) pronounced visual or audible notification; b) continuous gas monitoring as a trigger for the alarm system or for occupant monitoring; or c) telemetric monitoring services. 18 See the National Electric Code published by NFPA: www.nfpa.org