Grants Chlorinated Solvents Plume Site (GCSP) Grants, New Mexico Site Description The GCSP Site consists of an area of contaminated ground water containing chlorinated solvents at concentrations greater than EPA drinking water standards or maximum contaminant levels (MCLs). The presence of chlorinated solvents in ground water at the GCSP Site is a result of releases from dry cleaning operations. Chlorinated ethenes, principally tetrachloroethene (PCE), are present at concentrations up to 50,000 micrograms per liter (|jg/L), which is 10,000- times the MCL of 5 |jg/L. Volatilization from ground water leads to the presence of chlorinated ethenes in soil vapor in close proximity to the ground surface. Chlorinated ethenes have been found to accumulate within indoor air of residential homes at concentrations exceeding action levels. Current Site Status and Cleanup Actions to Date • In 2006, EPA selected the final remedy for the site in the Record of Decision (ROD). • In June 2008 EPA completed a one year long pilot study for the selected ground water remedy at the Site. In-Situ Chemical Oxidation (ISCO) and Enhanced Reductive Dechlorination (ERD) are two technologies selected to remediate ground water at the Site. Currently the EPA is designing the full scale remedy for the Site and expects to complete the design by August 2009. • In October 2008, the EPA will begin installing vapor mitigation systems (VIMS) in eleven homes located above the ground water plume. The EPA is taking a proactive step in installing these systems in 8 out of the 11 homes planned for construction. The EPA expects to complete the construction of the VIMS by December 2008. Current Funding Status • In Fiscal Year 2008, EPA obligated approximately $ 486,000 for the construction of vapor mitigation systems at this site. For more information on this site, please read the Grants Chlorinated Solvents Plume Site http://www.epa.ciov/reciion6/6sf/Dclffiles/0605144.Dclf on the Region 6 Superfund web site. Key Accomplishments • In 2006, EPA selected the final remedy for the site in the ROD. • In June 2008 EPA completed a year long pilot study for the ground water remedy that includes ISCO and ERD. • In October 2008, the EPA will begin construction of the vapor mitigation systems in eleven homes. ------- |