BACKGROUND
• AMEC Earth & Environmental Inc. is the current consultant
• INTERA Inc. formerly Duke Engineering & Services (DE&S), completed remedial investigation of the site in Jan. 2003
• Source Dry Cleaner Facility with release of DNAPL - Source: DNAPL, Dissolved phase plume: PCE
• Site consists of an approximately 58-acre plume of contaminated groundwater extending in an elliptical shape approximately 0.75 miles south, southeast of the source
• The estimated mass of PCE DNAPL in the source zone: 300 pounds (based on results from soil sampling), Dissolved-phase plume: approximately 275 pounds of PCE and its breakdown products
• The hot-spot bioremediation treatment area is located at the head of the ground water plume, within a group of privately-owned properties
• PCE concentrations within the hot-spot portion of the ground water plume (excluding the source area), along the plume centerline, range from approximately 5,000 to 40,000 ug/L
• Major Concern: The contaminated ground water plume is in a sole-source drinking water aquifer for the City of Española, the Santa Clara Pueblo trust lands, and nearby populations in the state of New Mexico

SITE BACKGROUND
• IWM is the consultant
• Former electronics manufacturing facility with release of VOCs primarily PCE, TCE and TCA
• Industrial Waste Management Consulting Group (IWM, formerly Handex) completed remedial investigation at the site in 1985
• Pump and Treat facility was installed February 1995 and has been running continuously since then
• TCE and PCE have been detected in groundwater samples above the published Risk Integrated System of Closure (RISC) Default Industrial Closure Levels established by the Indiana Department of Environmental Management (IDEM)
• Highest VOC concentrations were detected within the lower portions of a 14 feet thick layer of stratified fine to coarse sand and sandy gravel
• Damaged old sanitary sewer was a primary source and preferential pathway for the dissolved VOC plume
• Highly calcified subsurface environment