10. Some common outdoor spaces (i.e. alleys, yards, setbacks) may be included in this clean-up. They have been
included in the quantity estimates and shall be cleaned using the same procedures as the roof clean-up.
11. Air Monitoring shall be performed by NYSDOL licensed a Third Party Air Monitoring firm with certified
workers. The Third Party Air monitoring firm shall perform a visual inspection to confirm the absence of
ACM or debris after the areas are completely dry. Clearance air monitoring shall not be required if all samples
collected during the work were found to be below 70 s/mm2.
_ Page 4
05/03/02
NYC-WTC 000127571
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000127571Source: NYC Law Department, mirrored locally
Department of Environmental Protection letter to building owner regarding exterior building surveys conducted in vicinity of World Trade Center and observed debris accumulation.
Agreement between the City of New York and a landowner regarding the removal of foreign material from building facades near the former World Trade Center.