"Residents had been worried that if DuPont’s request to change its plan were granted, it would prevent some residents from getting vapor mitigation systems installed on their homes to remove the polluted air.
"Groundwater beneath the neighborhood of about 450 homes is contaminated with the cancer-causing solvents TCE and PCE, which had migrated for decades off of DuPont’s former munitions plant nearby. DuPont and state officials had known about the contamination since 1985, but never tried to clean it up because they thought it posed no hazard. In 2008, however, testing indicated that the solvents were vaporizing up through the soil and into some of the neighborhood’s basements.
"DuPont agreed to install vapor mitigation systems on homes in the plume at no cost to residents, even if air and soil testing showed no elevated levels in the homes. So far 329 homes have had systems installed.
When the state relaxed its residential screening levels for PCE gas in soils and in air last year, DuPont asked the DEP and federal Environmental Protection Agency to adjust its work plan to reflect the new levels.
That, the Record reports, generated dismay in the affected neighborhood, “because residents thought it might make it more difficult to obtain the vapor mitigation systems or even that they would be removed from some homes,”
”Some questioned whether changes might also shrink the size of the plume area and therefore the number of homes that qualified for the systems."
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