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