Pathways of Exposure

Resources

• Public Health Assessment Training (PHAT) Module 4: Exposure Pathway Evaluation - In this interactive web-based module, you will learn how to assess exposure pathways for contaminants. For example, you will discover how to determine whether these pathways are completed, potential, or eliminated.
• Public Health Assessment Guidance Manual (PHAGM): Exposure Pathways Section - In this PHAGM section, you will learn how to identify and assess past, present, and future exposure pathways throughout the PHA process. This section introduces and defines each component of an exposure pathway and offers helpful tips for conducting your evaluation.
• Exposure Unit Guidance: Refer to the Exposure Unit Guidance to learn about what exposure units are and how they are important in deciding whether exposure pathways are potential, completed, or eliminated.
• SHOWER Model Guidance – This guidance document describes how to evaluate inhalation and dermal exposure to chemicals that occur when people use water indoors for showering, hand washing, and other activities. When people use water indoors, volatile and semi-volatile chemicals in the water will volatilize to indoor air. Inhalation exposure results from people breathing the chemicals in indoor air, and dermal exposure results from skin contact with the chemicals in water. The guidance covers residential and non-residential scenarios.

Vapor Intrusion

• Guidance for Evaluating Vapor Intrusion Pathways - Use this ATSDR's guidance for information on how to evaluate vapor intrusion pathways.
• Soil Vapor Intrusion Conceptual Model Figure - In this vapor intrusion infographic, you will see how volatile contaminants can move through outdoor air, groundwater, and soil gas to ultimately enter indoor air in a residential home.
• Vapor Intrusion Data Quality Evaluation Worksheet - Use this list as a tool to track the data quality issues important to your vapor intrusion evaluations.
• Home Alterations and Vapor Intrusion - fact sheet template - Use this fact sheet template to explain to home and buildings' owners the effect that renovation activities can have on vapor intrusion and indoor air quality. The fact sheet also emphasizes the importance of monitoring radon levels during the renovation process.