Which situation requires TPH to be monitored in water samples?

Monitoring Total Petroleum Hydrocarbons (TPH) in water samples is essential when the concentration exceeds Remedial Action Levels (RBCs). When TPH levels are above RBCs, it indicates a potential risk to human health and the environment. This situation necessitates active monitoring to assess the extent of contamination, track changes over time, and inform remediation efforts that may be required to protect groundwater and surface water resources.

By conducting regular monitoring, you can evaluate the effectiveness of any mitigation measures and ensure compliance with environmental regulations. This vigilance is crucial in preventing further environmental impact and safeguarding public health. Therefore, when TPH levels are recognized as elevated (above RBCs), diligent monitoring becomes a necessary step in the management and remediation of contaminated sites.