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DEP hotline Q&A on HVAC cleaning and debris assessment, n.d.

Machine-extracted title · confidence 100%

Q&A sheet detailing procedures for assessing debris in ventilation systems and required abatement actions.

NYC-WTC_000142752–000142773

Folder label: “DEP 59.17 Junction Blvd, 11th FL

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Scanned page image, NYC-WTC_000142761
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NYC 9/11 Public Portal Document

• Why is there no mention of heavy metais tested indoors?

Outdoor monitoring around the WTC worksite and Indoor sampling conducted in schools near the site have not found elevated levels of heavy metals. Thus they were not considered a priority substance to be tested Indoors.

• is iead still being tested?

Yes [need to have some data - parents very concerned about possible elevated lead levels]

• What companies conduct indoor air and dust testing?

We cannot recommend specific companies but suggest callers refer to Yellow Pages under "Environmental Consultant”.

• What standard is the Department using to determine “acceptable levels”? How do you answer the charge from others that the standards being used are not protective of health, given the unique circumstances of the WTC collapse?

The standards being used are the most conservative ones available for the City to take regulatory action, (nj... .any other wording suggested?)

In evaluating data from the WTC and the surrounding areas, the DOH is using a protective standard under AHERA (Asbestos Hazard Emergency Response Act) to evaluate the risk. This standard is 70 structures per square millimeter, This is the standard normally used to decide when children may re-enter school buildings following asbestos-removal activities. The Department of Environmental Protection requires an asbestos abatement If more than 1% of dust in a bulk sample contains asbestos fibers. [For more Information refer to the Asbestos update of Jan 22, 2002 and DOH’s Q + A sheet on asbestos]

D. Air Conditioners

• Is it safe to run air conditioners? How do you know if your air conditioner is contaminated? If there is dust settled on Iha outside will it en*er Into the air inside?

DEP: 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

NYC-WTC_000142761

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NYC-WTC_000142761Source: NYC Law Department, mirrored locally

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