Regular air quality monitoring at 161 William Street has consistently demonstrated a safe environment for occupants. Initiated in response to the demolition of the 57 Ann Street garage, these measures include rigorous testing for various airborne contaminants to ensure the well-being of everyone in the building.
Comprehensive air sampling, conducted by a qualified third-party environmental consultant, has been a cornerstone of this monitoring process. On September 6th, tests focused on respirable dust and crystalline silica, while September 19th saw specific analysis for airborne lead within representative areas of 161 William Street. These tests were crucial in determining whether the adjacent demolition activities were negatively impacting the indoor air quality.
The results from these initial air quality assessments were reassuring. Respirable dust and silica levels were found to be significantly below the safety thresholds established by OSHA standards. Furthermore, Phase Contrast Microscopy (PCM) air sampling for asbestos indicated levels well under the stringent NYC-DP action and clearance criteria of less than 0.010 fibers per cubic centimeter (f/cc). Notably, even when compared to the OSHA permissible exposure limit of 0.10 f/cc over an eight-hour period, the PCM sample results remained considerably lower. Airborne lead analysis also yielded positive findings, with results falling below the detection limit, confirming the absence of detectable lead in the samples.
Read the third-party consultant’s reports on airborne lead (PDF) and asbestos and silica (PDF).
Beyond these specific contaminant tests, a comprehensive indoor air quality (IAQ) survey was conducted at 161 William Street on September 27th, and repeated on November 27th. This IAQ assessment evaluated key parameters including carbon monoxide (CO), carbon dioxide (CO2), temperature, and relative humidity in typical office spaces. In addition, air sampling was performed to measure organic vapors, total particulates, and non-viable fungi (mold) spores and particles. These repeated IAQ surveys provide a holistic view of the indoor environment at William Street.
Read the third-party report on indoor air quality from September 27th (PDF) and the November 27th IAQ report (PDF).
The consistent communication with the Department of Environmental Protection (DEP) further underscores the commitment to maintaining a safe environment. Based on the continuous testing and these detailed air quality evaluations, authorities have affirmed that 161 William Street remains a safe building for all occupants.
