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A View of the World Trade Center Site from the Hudson River.
The Deutsche Bank Building at 130 Liberty Street
The purpose of the air monitoring program is to monitor air quality in the vicinity of 130 Liberty Street during the decontamination and deconstruction of the building on that property. The original plan included hourly air sampling, seven days a week at 12 locations – four on the ground, four on the building, and four on surrounding buildings – for the following materials:
The plan has been modified over time with the approval of the US EPA to reflect current site conditions. For instance, after the completion of decontamination, sampling was generally reduced to PM 10 and Crystalline Silica as these are the materials associated with deconstruction. Similarly, as deconstruction has progressed and the building has been reduced in size, the number of monitors has been reduced. Currently, the program includes hourly air sampling on days when work is ongoing at 7 locations – four on the ground and three on surrounding buildings.