NYC 9/11 Public Portal Document
Air Monitoring in Lower Manhattan Page 3 of 3
DEP has been working with the involved City agencies, including the Board of
, Education, to provide air monitoring in and around the schools near the World Trade
Center disaster site. DEP is collecting 8 hour ambient air samples that are analyzed
for asbestos at four locations. These locations are outside of the main entrances to:
Stuyvesant High School, IS/PS 89, PS 234 and the High School of Economics and
Finance. DEP began sampling on October 4, 2001. From October 4th through
October 18th, DEP only did a TEM analysis if the PCM concentration was above
0.01 fibers per cubic centimeter (f/cc). During this period of time, there was only one
reading above 0.01 f/cc. The TEM result was below the Asbestos Hazard Emergency
Response Act (AHERA) standard of 70 structures per square millimeter (s/sqmm).
As of October 19, DEP began conducting a TEM analysis on all samples to provide a
direct comparison to the AHERA standard. Of the 356 samples that have been
collected between October 19 and January 15, 2002, all have been well below the
AHERA standard of 70 s/sqmm. Since that period, the results continue to be well
below the AHERA standard.
School Monitoring Data
Additonal Information
. Advisory for Building Façade Clean-up
. Notice to Building Owners Located South of 14th Street. Manhattan: Building
Maintenance Issues Involved in Reopening Buildings Closed Since 9/11/01
. New York City Department of Health Responds to the World Trade Center
Disaster
Last updated February 1, 2002
Air, Noise and Hazardous Materials
DEP · Air monitoring in Lower Manahattan
· Certified Asbestos Investigators. Contractors and Firms
. Asbestos Rules and Regulations
(top ) · Asbestos Abate nent Activity Forms
About DEP | Customer Information| Education Information (DEP News | Contact Us | DEP Homepage!
Go to NYC.gov Home Page
Mayor's Office | City Agencies | Services| News and Features [City Life | Contact Us | Search
NYC-WTC 000148602
OCR can misread numbers and units. Confirm readings against the page image before using them.