Stage of Clean-up: Study Underway
The Grants Chlorinated Solvents Plume site is a ground water plume contaminated with chlorinated solvents in the vicinity of First and Jefferson Street in the city of Grants, Cibola County, New Mexico. The site is located in a primarily mixed commercial/residential area. The area of the ground water plume is defined by ground water samples collected from monitoring wells in the upper shallow alluvial aquifer. The precise extent of the ground water plume has not been defined, but currently covers an area of approximately 4.2 acres.
The New Mexico Environment Department (NMED) Underground Storage Tank Bureau discovered the ground water plume in August of 1993 during an environmental investigation associated with underground gasoline storage tanks. Ground water sampling detected the occurrence of perchloroethene (PCE), trichloroethene (TCE) and dichloroethene (DCE) above federal drinking water standards in three monitoring wells. Subsequent ground water sampling in the spring of 1994 identified these same chlorinated solvents in three additional monitoring wells installed at the site.
Ground water and soils at the site are contaminated with volatile chemicals that include PCE, TCE, DCE, and vinyl chloride (VC). High concentrations of these volatile compounds have been detected in shallow ground water at the site that is just 4 to 6 feet below the ground surface. More...