DEP WTC General Correspondence Form

NYC 9/11 Public Portal Document

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IO* IMRubit EPA Response to September 11 Recent Additions | ContecLUs | Print Version Search; J..................... Response to 9-11 > Fact Sheets > WTC Residential Testing Results

Dust Cleanup Request Info WTC Residential Testing Results Request Map Result Info The work of cleaning and testing residences in lower Manhattan (south of Canal Result Map Street) is underway. Depending upon the assistance requested, EPA is arranging for New! licensed contractors to clean and/or test residential units (fact sheet) for asbestos in Follow Up air. There is no charge for this service. Fact Sheets I Scopes Asbestos in air test results for individual residences are provided only to residents of the affected unit. Aggregate test results are provided here. The locations of residences Frequently that have cleared or not cleared EPA's testing criteria will be identified by block. Asked Questions EPA is committed to setting the most stringent standards that can be technically Ads & Flyers achieved when testing residences for asbestos in air. We have set an initial risk-based clearance level for asbestos of 0.0009 fibers per cubic centimeter (f/cc). This means EPA Press Releases that if 10,000 people are exposed to this level of asbestos for 30 years, there may be one more case of cancerthan if the group had not been exposed at all. Pictures The EPA Testing for asbestos (fact sheet) in air calls for moving a measured volume of air Experience across a filter, then examining that filter under a microscope equipped with a grid and counting the number of asbestos fibers found. Problems arise when too many dust and Monitoring fiber particles are captured by the filter. The filter becomes overloaded and Summaries technicians examining it under the microscope cannot separate out or identify New York City individual fibers. Residences where this occurs are listed as "Not Determined." In a Area residence where only testing was conducted, EPA recommends that the home be Pentagon cleaned and re-tested. In a residence where both cleaning and testing were done, EPA Monitoring Data will attempt to identify potential sources and will then re-clean and re-test the home. Asbestos in Air Test results below reflect analytical results received through August 29,2003. Asbestos in During the initial stage of cleaning and testing, results will be updated on a weekly Bulk Dust basis. Once data flow is established, this table will update automatically as test reuits Benzene in Air are entered. Chromium in Air Dioxin in Air Drinking Water Test Only Lead in Air Metals in Air Quadrant (Map) Total Requests Cleared Not Cleared Not Determined Particulate A 92 81 i io Matter 2.5 Particulate B 189 177 5 7 Matter 10 C 134 126 2 6 PCBs in Air Polycyclic D 309 302 i 6 Aromatic Total 724 686 9 29 Hydrocarbons VOCs: Volatile Organic A VM WMi a vsrle Clean and Test

http://www.epa.gov/wtc/factsheets/clean_test_results.htm 9/8/2003

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