Ventilation System Evaluation Form, WTC Site, Feb 2003

NYC 9/11 Public Portal Document

• 2.2 • Mechanical Exhaust Syste Visual action Form Mechanical Exhaust System Identification: Page 1 of 1 Location: Area Served:

Associated mechanical room: clean Y Y N stored chemicals/refuse Y N System Components Surface Component Dust/ RTC l; not [NOTE: if component not present (NP), not found (NF) or inaccessible (I) please Debris Dust present indicate in last column] Present? Present? ~ not found

Exhaust air outlet: Location:

Accessible for inspection? Y 1 N (explain): _ L louvers, grates and/or screens outside air duct outside air damper(s) Exhaust fan unit: blower assembly incl. blower wheel, housing, air vanes, in-line noise attenuators • blower housing acoustical lining vibration collars Exhaust air distribution: Exhaust air ducts Est total In ft I No. locations inspected Specify type (circle): met1) flex-duct Accessible in-line fire dampers Est total qty fibrous class board r IN No locations i Accessible turning vanes Est total qty No locations i Exhaust air lles Est total qty It No locations i Other (specify):

Other Information:

General impression (indicate recommendations for cleaning based on finding of «TC dust):

No lam,';

KEY: NP = not NF = not found; I = inaccessible: U =

NYC-WTC 000133718