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The U.S. Environmental Protection Agency (EPA) and other federal, state and local agencies have collected extensive environmental monitoring data from the World Trade Center site and nearby areas in Manhattan, Brooklyn and New Jersey. Since September 11, EPA has taken samples of the air, dust, water, river sediments and drinking water and analyzed them for the presence of pollutants that might pose a health risk to response workers at the World Trade Center site and the public. The samples are evaluated against a variety of benchmarks, standards and guidelines established to protect public health under various conditions. EPA is collecting data from more than 20 fixed air monitors in and around ground zero and additional monitors in the Bronx, Brooklyn, Queens and Staten Island. The Agency is also using portable sampling equipment to collect data from a range of locations.
Air: Fixed Monitors in New York:
Asbestos - EPA analyzed 44 samples taken in and around ground zero on December 4 and December 5. In addition, EPA took six samples at three additional lower Manhattan locations on December 2 and December 3. All samples showed results less than 70 structures per square millimeter, which is the Asbestos Hazard Emergency Response Act (AHERA) standard for allowing children to re-enter school buildings after asbestos removal activities. This brings the total number of air samples collected and analyzed for lower Manhattan to 3,108, with 29 samples above the standard (27 of these were collected prior to September 30, one was collected on October 9 and the other on November 27).
Air: Fixed Monitors outside lower Manhattan:
Asbestos - Additional asbestos monitors have been placed at Public School 154 (33 East 135th St., Bronx), Intermediate School 143 (511 W. 182nd St., Manhattan), P.S. 274 (800 Bushwick Ave, Brooklyn), P.S. 44 (80 Maple Parkway, Staten Island) and P.S. 199 (3290 48th St., Queens). Ten asbestos samples collected on December 2 and December 3 from these locations showed no exceedances of the AHERA re-entry standard.
Staten Island Landfill:
Air (Asbestos) - Nineteen samples were collected on December 5. All were below the school re-entry standard.
Air (Particulates) - EPA used portable monitors to collect samples of particulates on December 6 at the Staten Island Landfill. No significant readings reported.
U.S. Government Website