What must be assessed for Generic Remedy 2 if TPH levels are between 2,500 and 9,999 ppm?

When Total Petroleum Hydrocarbons (TPH) levels are between 2,500 and 9,999 parts per million (ppm), it is essential to assess the vapor intrusion risk. Vapor intrusion occurs when volatile chemicals from contaminated soil or groundwater migrate into indoor air spaces, potentially leading to harmful health effects for occupants. Given the concentration range, the TPH levels may result in significant vapor emissions that could pose a risk, necessitating an evaluation of how these vapors might affect air quality within nearby buildings.

In this context, focusing on vapor intrusion risk is crucial, especially as it can influence not just the immediate environment but also the health and safety of individuals who might be exposed. This assessment involves understanding the properties of the hydrocarbons present, the geology of the site, and the proximity of any structures that could be affected by vapor migration.

Addressing other areas such as surface water impact, air quality, or soil erosion might also be relevant in different scenarios, but when specifically dealing with TPH levels within this range, the immediate concern prioritizes the potential risk of vapor intrusion. This thorough assessment is a critical step in ensuring that appropriate remedial actions can be taken to safeguard health and the environment.