What is the requirement for benzene sampling in HOT Generic Remedy cleanups when contamination is between 2,500 and 10,000 ppm?

The requirement for benzene sampling in HOT Generic Remedy cleanups when contamination levels are between 2,500 and 10,000 ppm is that the benzene concentration must be less than 0.1 ppm. This threshold is critical because benzene is a known carcinogen and poses significant health risks even at very low concentrations. The low acceptable level ensures that any remaining contamination does not pose a risk to human health or the environment.

Setting the limit at less than 0.1 ppm reflects a strong emphasis on safety and remediation effectiveness, which aligns with regulatory and environmental protection standards. The stringent requirement highlights the importance of thorough cleanup efforts, especially in areas that have historically experienced higher levels of benzene contamination. This approach is necessary to ensure that the site is safe for future use and protects nearby communities from exposure to harmful levels of this toxic substance.