EPA memo re: wipe sampling and cancer risk at WTC,

NYC 9/11 Public Portal Document

s/mL X time period (years) s total dose (s-year/mL) 0.16 (14/365)x( 9C4) 0.0023 10 (14/365)x(3/24) 0.0479 0.000006 85 0.0005 total dose (cumulat^e exposure) 0.0507

From Table 3, the increased risk of getting mesotnelioma will be almost 2 per 100,000 for the one week volunteer service in New York City. The whole life in an urban etting contributed very little to this risk. Going indoors to the contaminated building for 3 hours a day, rather than staying outside, represents essentially all of this rick.

If the volunteer had stayed outside for the whole time, the risks would be as follows:

s/mL X time period (years) total dose (s-yearZmL) 0.16 (14/365)x(12i24) 0.U031 0.000006 85 0.0005 total dose (cumulative exposure) 0.0036

The increased risk of mesothelioma would be around 1 in 100,000, due almost entirely to the 2 weeks service in NYC.

Scenario 2 - Resident of Lower Manhattan tn contaminated building

A resident works in lower Manhattan and was present nearby during the collapse of the World Trade Center, but not in a building whose windows were blown out The resident was engulfed by die dust cloud while walking up to Warren Street to her/his apartment. The resident stayed one night with no electricity and water because of 3 cats before leaving for two days, returning September 14 after restoration of services. There was no forced evacuation of the apartment building, many residents lemained even when there was no electricity or water.

The landlord was in the process of cleaning common areas, which were primarily carpeted, by common cleaning techniques, vacuuming and dusting, starting September 14, for 4 days. The resident perfonned her/his own apartment cleaning and has remained in place. The resident only wore a dust mask, as recdhimended by the New York City Department of Health (NYC DOH) while cleaning the apartment,’* which provided no protection against the asbestos.

The apartment building interiors only had a minimal, small amounts of dust from the WTC. Walter Mugdan, Counsel for EPA’s Region 2, stated that the NYC DOH Recommendations should be followed in situations with minimal, small amount, of WTC dust.” An apartment with just such minimal, small amount of WTC dusts was the subject of the Ground Zero Task Force study, and the asbestos concentrations, and may be found in Table 2. A color photograph of a dark table is included in this study, showing what would be considered “small amounts” and “minimal” dusts by most people.”

jjj Lower Manhattan where the resident works had similar cleaning measures

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