E-mails M. Gilsenan

NYC 9/11 Public Portal Document

contanainated materials that cannot be cleaned should be removed in sealed plastic bags. There are no special requirements for the disposal of moldy materials. jj. The work area and areas immediately surrounding the work area should be HEPA vacuumed and cleaned with a damp cloth and/or mop and a detergent solution. kk. All areas should be left dry and visibly free from contamination and debris. 11. A variety of biocides are recommended by HVAC manufacturers for use with HVAC components, such as, cooling coils and condensation pans. HVAC manufacturers should be consulted for the products they recommend for use in their systems.

3.5.2 Areas of Contamination (>10 square feet) in the HVAC System A health and safety professional with experience performing microbial investigations should be consulted prior to remediation activities to provide oversight for remediation projects involving more than a small isolated area in an HVAC system. The following procedures are recommended:

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

i. Respiratory protection (e.g., N95 disposable respirator), in accordance with the OSHA respiratory protection standard (29 CFR 1910.134), is recommended. ii. Gloves and eye protection iii. Full-face respirators with HEPA cartridges and disposable protective clothing covering both head and shoes should be worn if contamination is greater than 30 square feet. nn. The HVAC system should be shut down prior to any remedial activities. 00. Containment of the affected area:

i. Complete isolation of work area from the other areas of the HVAC system using plastic sheeting sealed with duct tape. ii. The use of an exhaust fan with a HEPA filter to generate negative pressurization. iii. Airlocks and decontamination room if contamination is greater than 30 square feet.

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