The Army study focuses on how best to treat groundwater for TCE (Trichloroethylene) and 1,4 dioxane
Very low" levels of benzene also were detected in monitoring wells around the landfill but the concern is less because benzene is biodegradable while 1,4 dioxane
is not, said DEP spokesman Ed Putnam.
The 1,4 dioxane is a colourless, flammable liquid with faint odour and belongs to heterocyclic organic compound with two oxygen atoms, each with free electrons which make them hydrophilic and miscible in water (Fig.
Zenker et al  reported that 1,4 dioxane is used as a solvent stabilizer in industries to prevent the breakdown of chlorinated solvents during manufacturing processes.
In 2009, for example, the Campaign for Safe Cosmetics analyzed dozens of children's products and found that many contained formaldehyde and 1,4 dioxane
, two substances slated for removal by J&J.
After the Campaign for Safe Cosmetics (CSC) issued last month the results of study that found high levels of 1,4 dioxane
and formaldehyde in personal care products, the Personal Care Product Council issued a statement challenging the results.
The EPA has classified the 1,4 Dioxane
as a Group B2, a probable human carcinogen.
The 1,4 dioxane
content in Himalaya shampoos is well within the limits set by regulatory bodies.
The ROD also includes plans to clean up a 1,4 dioxane
plume in the groundwater, which may be migrating to below the adjacent Assabet River.
As part of this ROD, EPA has also decided to accelerate the cleanup of 1,4 dioxane
in groundwater by initially addressing the contamination under Non-Time Critical Removal Authority.
State and federal officials say they are confident the high levels of the likely carcinogen 1,4 dioxane
, found in an Artesian well under Llangollen Estates, escaped from the Delaware Sand & Gravel Landfill federal Superfund site, nearly a mile to the north off Grantham Lane.
EPA s proposal would also accelerate the cleanup of 1,4 dioxane
and Volatile Organic Compounds (VOCs) in groundwater.