HVAC cleaning guidance memo regarding debris, 2001

NYC 9/11 Public Portal Document

1. A.

1. Contact your building owner and request the information. The Department advised building owners to change filters if they found debris after 9/11. 2. No, there are professional HVAC cleaners that building owners can contact. 3. Call Center will take information from the individual and DEP will respond' The requirements for cleaning vary based on the hazard assessment. 4. Same as 3 5. In general, the occupants are responsible for cleaning their spaces. DOH guidance document available on nyc.gov

B, 1. No 2. Information not available 3. Information not available 4. DOH guidance document available on nyc.gov

C. 1. DOH 2. DOH 3. DOH 4. DOH 5. DOH 6. DOH 7. DOH D. 1. Outdoor air samples have indicated that the air quality meets the current standards. However, if visible accumulations of debris are observed near the air conditioner’s intake, the accumulations should be cleaned using vacuums equipped with HEPA filters and wet methods prior to using the A/C. 2. Refer to 1 above 3. It depends on examination of filters and manufacturer’s specifications and recommendations. 4. We are not aware of any air conditioner brands that can be retrofitted with a HEPA filter. II All pertain to DOH

III A. 1. DOH, ATSDR, EPA, and others 2. The OSHA PEL is 0.1 f/cc for an 8-hour day. The results of air sampling did not approach this limit. The OSHA standard is not the standard being applied to residents or occupants of the WTC vicinity. The existing more stringent re­ occupancy standards are being used. 3. See 2 above '

B.

NYC-WTC_000142774