Zephyr prepared an application for the RRC Voluntary Cleanup Program to obtain a Certificate of Completion for a 640-acre site located in Montgomery County, Texas. Phase I of the process was to identify all of the former well locations and their associated pits, obtain plugging reports, identify the presence of water wells, and provide information on the potential presence of impacted soil and groundwater. Zephyr conducted investigations of the more than 30 well sites and associated pits. Impacted groundwater was delineated and monitored over time to demonstrate that the plume was not expanding. This area was deed recorded and a Certificate of Completion was issued.