E-mails M. Gilsenan

NYC 9/11 Public Portal Document

iii. Airlocks and decontamination room z. Vacating people from spaces adjacent to the work area is not necessary but is recommended in the presence of infants (less than 12 months old), persons having undergone recent surgery, immune suppressed people, or people with chronic inflammatory lung diseases (e.g., asthma, hypersensitivity pneumonitis, and severe allergies). aa. Contaminated materials that cannot be cleaned should be removed from the building in sealed plastic bags. The outside of the bags should be cleaned with a damp cloth and a detergent solution or HEPA vacuumed in the decontamination chamber prior to their transport to uncontaminated areas of the building. There are no special requirements for the disposal of moldy materials. bb. The contained area and decontamination room should be HEPA vacuumed and cleaned with a damp cloth and/or mop with a detergent solution and be visibly clean prior to the removal of isolation barriers. cc. Air monitoring should be conducted prior to occupancy to determine if the area is fit to reoccupy.

3.5 Leve/ k Remediation of HVAC Systems 3.5.1 A Small Isolated Area of Contamination (<10 square feet) in the HVAC System

dd. Remediation can be conducted by regular building maintenance staff. Such persons should receive training on proper clean up methods, personal protection, and potential health hazards. This training can be performed as part of a program to comply with the requirements of the OSHA Hazard Conununication Standard (29 CFR 1910.1200). ee. Respiratory protection (e.g., N95 disposable respirator), in accordance with the OSHA respiratory protection standard (29 CFR 1910.134), is recommended. Gloves and eye protection should be worn. ff. The HVAC system should be shut down prior to any remedial activities.

gg. The work area should be covered with a plastic sheet(s) and sealed with tape before remediation, to contain dust/debris. hh. Dust suppression methods, such as misting (not soaking) surfaces prior to remediation, are reconunended. ii. Growth supporting materials that are contaminated, such as the paper on the insulation of interior lined ducts and filters, should be removed. Other

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