For contaminants above 10,000 ppm, what is generally required?

When contaminants are present at levels exceeding 10,000 parts per million (ppm), it typically necessitates a more stringent assessment plan. This requirement stems from the potential health risks and environmental impacts associated with high concentrations of hazardous substances. A thorough assessment is critical to identify the nature of the contaminants, the extent of their spread, and the appropriate mitigation measures that need to be implemented.

The need for a more rigorous assessment ensures that the impact on human health and the environment is adequately addressed. This process may involve detailed sampling, advanced testing methods, and possibly the involvement of regulatory agencies to ensure compliance with health and safety regulations. It is essential to accurately characterize the site to develop effective remediation strategies.

In contrast, less stringent measures may not meet the necessary safety standards when dealing with such high levels of contamination, which is why they would not be appropriate in this scenario.