CDM designed a groundwater pump-and-treat system to control and minimize the movement of groundwater contaminants at the Tutu Wellfield SuperFund site in St. Thomas. High concentrations of chlorinated volatile organic compounds, benzyne, toluene, ethylbenzene, and xylene have been found. CDM conducted pre-design investigations to determine the aquifer's hydraulic characteristics and current levels and distribution of groundwater contaminants. Pre-design activities included multi-media sampling and analysis, drilling and installing 14 monitoring wells and four new extraction wells, and installing seven piezometers. CDM prepared a final design report, which included specifications, drawings, and detailed project cost estimates; is currently providing remedial action oversight services on remedial design/remedial action activities being performed by the potentially responsible parties (PRPs); and continues to serve as a liaison between the EPA and the PRPs' representatives.
CLIENT: U.S. Environmental Protection Agency, Region II
LOCATION: St. Thomas, U.S. Virgin Islands