GROUNDWATER RECOVERY AND TREATMENT FOR CHLORINATED ORGANIC-COMPOUNDS

Groundwater, containing chlorinated solvent contaminants, is being remediated under an EPA post-closure permit at a former electronics manufacturing and assembly facility. The activities have included the installation of two recovery wells, two background monitoring wells, more than 20 downgradient monitoring wells, pump tests to estimate the area of influence of the recovery wells, and the installation and operation of an air stripping system to treat the recovered groundwater prior to discharge to a POTW. Groundwater quality is being monitored on a quarterly basis. Due to the effectiveness of the remedial measures, the long-term trend of chlorinated solvent concentrations in the groundwater is decreasing over time. The site geology is characterized by about 20 feet of overburden underlain by fractured limestone. Aerial photography and a geophysical survey were employed to locate suitable fractures for placement of the recovery and monitoring wells.