Main Roof Mechanical Exhaust Fan #3 For Each:
Main Roof Mechanical Exhaust Fan #4 Louvers, grates, and/or screens
Main Roof Mechanical Exhaust Fan #5 Outside air duct
Elevator Room Roof Mechanical Exhaust Fan #6 Blower assembly
Elevator Room Roof Mechanical Exhaust Fan #7 180 linear feet exhaust air ducts
19 exhaust air grilles
14 Floor Terrace Mechanical Exhaust Fan #8 Louvers, grates, and/or screens
14th Floor Terrace Mechanical Exhaust Fan #9 Outside air duct
Blower assembly
140 linear feet exhaust air ducts
14 exhaust air grilles
Basement HV-1 Unit Serves basement rooms, hallways on all floors
louvers, grates, and/or screens
outside air duct
WTC dust only present in fresh air intake up
to filters and was not observed beyond
filters.
Cleaning of entire s tem indicated
NYC-WTC-000117375
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000117375Source: NYC Law Department, mirrored locally