The requirements of the Federal Coal Combustion Residuals Rule are evolving and ambiguous.  This presentation will highlight the challenges and opportunities associated with the Groundwater Monitoring and Corrective Action part of the rule in its current status, and potential changes that should be taken into account for an effective compliance program.  You will learn what ambiguities and opportunities exist in the current rule, how they affect remedy selection, how forensic tools might be used to avoid, or limit, the scope of groundwater corrective measures, and key issues that may arise during public involvement in the remedy selection process.