The NRA's investigation is focussed on Higher Kiln landfill, near Tiverton. The site is operated by Haul-Waste, a subsidiary of English China Clays. It is unlined and has been run as a "dilute and disperse" operation since the 1940s. The local geology is a complex series of porous limestones and shales.
Devon County Council believes that the site accepted oils and chrome wastes from the tanning industry in its early years. Oil was detecte