 Dried solids were periodically scraped from the impoundments and taken to the burning grounds for incineration and burial.After the discovery of contaminated groundwater in 1981, the Army extended Grand Island city water lines to rural subdivisions (that as of 2014 are part of the Capital Heights and Le Heights areas) in 1985 because wells may have exposed residents to the contaminated water.In 1987, the Army burned about 40,000 tons of explosives-contaminated soil.