An underground leak has been discovered within the World Trade Center complex — and officials fear the seepage may be coming from the slurry wall that separates the newly rebuilt Ground Zero site from the Hudson River […]
They fear that the slurry wall may not have been properly insulated, allowing water to seep through it, sources said. […]
The wall’s emotional significance was immortalized when a portion was left exposed inside the National September 11 Memorial Museum. — dnainfo.com
The Port Authority of New York maintains that there aren’t any known issues with the slurry wall, but that engineering and construction officials were called in to follow up on workers’ reports that they heard water rushing “behind the walls of lower concourses of the complex”.
More news on and around the WTC site: