Radon 202: Inspecting Mitigation Systems
I. General Overview
5 Topics
Definition of Mitigation System
Goals of Radon Mitigation Systems
Additional Benefits of Mitigation Systems
Mitigation System Compliance
Post Mitigation Testing Requirements
II. Active Mitigation Systems
10 Topics
Types of Active Mitigation Systems
Sub-Membrane Depressurization (SMD)
Understanding Systems With Multiple Suction Points
Vent Pipe Requirements
Variances
Entry Routes and Sealing Requirement for Active Systems
Fan Location Criteria
Exterior Fan Installation
Electrical Requirements
Required Labeling of Active System Pipes
III. Passive System Installation
9 Topics
The Radon Resistant Construction Act
Passive Pipe Installation
Vents In Crawlspaces
Soil Gas Retarders
Proactive New Construction Design Requirements
Required Labeling of Passive Pipes
Combination Foundations
Joints in Air Ducts and Plenums
Activation of Passive Systems
Radon 202: Inspecting Mitigation Systems Final Exam
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Soil Gas Retarders
Radon 202: Inspecting Mitigation Systems
III. Passive System Installation
Soil Gas Retarders
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Any seams in soil gas retarder membranes must be overlapped at least 12 inches and sealed in a permanent air tight manner using compatible glues.
The membrane must also be sealed around interior piers and to the inside of exterior walls with furring strips and compatible glues.
The sheeting should cover the entire floor area with separate sections of sheeting overlapped at least 12 inches.
The sheeting should fit closely around any pipe, wire or other penetrations of the material.
All punctures or tears in the material should be sealed or covered with additional sheeting.
422.160(e)(3)
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