NYC 9/11 Public Portal Document
the collapse of the World Trade Center and if these systems require cleaning.
a. In cases where cleaning is requested for an individual residence, portions ofthe HVAC
system dedicated to that residence will be evaluated.
b. In cases where cleaning is requested for a whole building, the building’s HVAC system
will be evaluated as a whole.
c. HVAC assessments shall be conducted in accordance with die National Air Duct Cleaners
Association (NADCA) General Specification for the Cleaning ofCommercial Heating,
Ventilating and Air Conditioning Systems and the NADCA Assessment, Cleaning and
Restoration Standard (ACR 2002).
d. The results ofthe whole building HVAC system evaluations shall be documented in a letter
report. This report shall be provided to DEP and EPA within 2 business days ofthe
completion ofthe evaluation. This reportshall include the name and qualifications of
inspector, date ofinspection, building location, adescription ofthe HVAC system, the
basis for the determining whether or not the system was impacted by the collapse ofthe
WTC and if the system requires cleaning.
Deliverables
The Project Monitor shall record ifthe HVAC systems has been impacted by dust or debris from
the collapse of the WTC, if the HVAC system has been evaluated and cleaned subsequent to
September 11,2001 (ifyes, then when and by whom) and ifthe HVAC system requires cleaning.
This information shall be provided via F2L or an agreed upon alternative electronic format or
website approved by EPA within 24 hours of activity.
6. HVAC systems that have been impacted by dust or debris from the collapse ofthe World Trade
Center will be cleaned. In the event that aHVAC system for an entire building requires cleaning,
a separate, site specific contract will be awarded by DEP for this work. If only a portion of a
HVAC system requires cleaning, then the cleaning contractor will conduct the cleaning utilizing
specialized labor trained and experienced in duct cleaning.
a. The monitoring contractor shall schedule and oversee the cleaning of HVAC systems.
b. The Monitoring Contractor shall inspect HVAC systems or portions thereofcleaned to
verify cleanliness. Ifvisible dust or other contaminants are evident through visual inspection
or testing, then the Monitoring Contractor will direct the HVAC cleaning contractor to
relean those portions of the system where dust or other contaminants are present and
reinspect.
c. HVAC cleaning, and cleanliness inspections shall be conducted in accordance with the
National Air Duct Cleaners Association (NADCA) General Specification for the Cleaning
of Commercial Heating, Ventilating and Air Conditioning Systems and the NADCA
Assessment, Cleaning and Restoration Standard (ACR 2002).
7. Sampling of residences and common spaces where cleaning has not been requested
a. Based on consultation with resident, aggressive or modified aggressive air sampling will be
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