DEP Environmental Referral Form, WTC Site

NYC 9/11 Public Portal Document

• WTC Environmental Monitoring: Latest Summary Page 1 of 4

EPA Response to September 11 Contact Us I Print Version Search: P&UQJnO> Resoense to 9-11 r Monitoring Summaries

Monitoring Summaries Monitoring Data Daily Environmental Monitoring Summary Frequently Asked Question" Friday-Monday, March 9.11, 2002 Pictures The U.S. Environmental Protection Agency (EPA) and other federal, state and local EPA Press Releases agendas him collected extensive environmental monitoring date from the World Now You Can Help 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. Is collecting data from more then 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.

Resulto im of 6:46 p.m. on 3111

Air: Fixed Monitors In New York: Asbestos - EPA analyzed 18 samples taken In and around ground zero on March 1. Ali 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 5,623, with 17 samples above the standard (11 of these were collected prior to September 30; the other six were collected on October 8, November 27, December 27, January 14, February 6 and February 11).

This number of exceedances Is lower than reported on prior daily summaries. Earlier sampling results Included an additional, unnecessary adjustment for the volume of air sampled. Using a more appropriate method, those results have been recalculated and the true levels of asbestos measured are generally lower. Consequently, the standard was actually exceeded less often than previously stated.

Staten Island Landfill; Air (Asbestos) - Thirty-seven air samples collected on March 1 and March 2 were analyzed for asbestos. All samples were below the school re-entry standard.

Metals - Four air samples were collected an February 22 and analyzed for metals. All metals were either not detected or were below applicable EPA Removal Action level guidelines, OSHA PELs, and the NAAQS for lead.

Ambient Air Samples: Particulate Monitoring - EPA used portable monitors to collect samples on March 7 and March 8 at Location "L" (northeast side of Stuyvesant High School) and Location "N" (south side of Pier 25). All reading* were below the OSHA time- weighted permissible exposure limit for particulates.

ZT d ST: 2.I Z01 £Z -JEW trt72.LS6S8Q.: XPJ 3X3 I.' Z'M4tfH d3Q JAN NYC-WTC 000147010