This chapter provides basic information on the ways in which radon enters a home and how the indoor and outdoor environments affect its behavior.
- Chapter 3: Entry and Behavior of Radon in Indoor Air
- Radon Sources
- Radon from Radium in Soils and Bedrock
- Radon Transport Mechanisms
- Concentration Gradient Diffusion (rock & soil)
- Emanation from Building Materials
- Factors Affecting Indoor Radon Levels
Chapter Learning Objectives
- Identify the primary routes of radon entry into a building
- Identify (4) mechanisms that transport radon into a building
- Identify (3) ways in which Pressure Driven Airflow draws radon into a building
- Define the concept of stack effect
- Define the concept of neutral pressure plane. List negative pressure sources (thermal bypasses) in a building
- Explain how a spike in radon levels inside the home can occur
- List six pathways for pressure driven transport
- Identify the five common foundations common in the US and define which are pathways for pressure driven airflow
- Explain how daily and seasonal variations effect radon concentrations.
- Describe the effect of ventilation on indoor radon concentrations.
- Identify the EPA Guideline for radon in water
- Identify the primary contribution to indoor air caused by radon in water
- Identify the primary sources of radon in water.
- Identify the primary contribution to a radon in air problem due to radon in water.
- List the typical water sampling methods.
- Identify the two methods of analyzing collected water samples.
- Name at least one pro and one con for each water sampling method.