Subsurface investigations at this operating manufacturing facility revealed TCE contamination in saprolite and bedrock aquifers. The complicated site geology created the need for a remedial strategy effective in tight soil and fractured bedrock. Accelerated bioremediation using HRC was selected for a pilot study because its use offered a remedial method that would not interrupt on-going facility operations while effectively degrading contaminants. Unique attributes of this project include initial TCE concentrations in parts per million (ppm), HRC delivery to saprolite and bedrock aquifers, and a long quarterly monitoring program for multiple parameters. In addition, HRC was successful in reducing the high concentrations despite a continual influx of TCE into the treatment areas and HRC longevity was at least 3 years.