E-mails M. Gilsenan

NYC 9/11 Public Portal Document

recent surgery, immune suppressed people, or people with chronic inflammatory lung diseases (e.g., asthma, hypersensitivity pneumonitis, and severe allergies). t. Dust suppression methods, such as misting (not soaking) surfaces prior to remediation, are recommended. u. Contaminated materials 1hat cannot be cleaned should be removed from the building in sealed plastic bags. There are no special requirements for the disposal of moldy materials. V. The work area and surrounding areas should be HEPA vacuumed and cleaned with a damp cloth and/or mop and a detergent solution. w. All areas should be left dry and visibly free from contamination and debris.

If abatement procedures are expected to generate a lot of dust (e.g., abrasive cleaning of contaminated surfaces, demolition of plaster walls) or the visible concentration of the fungi is heavy (blanket coverage as opposed to patchy), then it is recommended that the remediation procedures for Level IV are followed. 3.4 Z.ei/e//l4 Extensive Contamination (greater than 100 contiguous square feet in an area) A health and safety professional with experience performing microbial investigations should be consulted prior to remediation activities to provide oversight for the project. The following procedures are recommended:

X. Personnel trained in the handling of hazardous materials equipped with:

1. Full-face respirators with high efficiency particulate air (HEPA) cartridges 11. Disposable protective clothing covering both head and shoes iii. Gloves y. Containment of the affected area: 1. Complete isolation of work area from occupied spaces using plastic sheeting sealed with duct tape (including ventilation ducts/grills, fixtures, and any other openings) ii. The use of an exhaust fan with a HEPA filter to generate negative pressurization

NYC-WTC_000163396