NYC 9/11 Public Portal Document
• The Occupational Safety and Health Administration (OSHA), within the
Department of Labor, conducted ambient and bulk dust sampling within the
immediate Ground Zero work zone and provided guidance to Ground Zero
workers regarding the use of personal protective equipment.
• Within the Department of Health and Human Services:
► The National Institute for Occupational Safety and Health (NIOSH)
assisted in ensuring worker health and safety.
► The Agency for Toxic Substances and Disease Registry (ATSDR)
provided technical assistance to the New York City Department of
Health by conducting an indoor residential sampling and assessment
project.
► The Public Health Service provided assistance to the New York City
Department of Health.
Appendix A provides further details on the various tasks performed by these and
other Federal Agencies.
Scope and Methodology
Our evaluation focused on EPA’s response to air quality concerns - both ambient
and indoor - for the period September 2001 through April 2003. Our work was
performed at various EPA offices and the offices of several other Federal
agencies, such as FEMA, OSHA, and ATSDR. We also performed work at
various New York City offices. Further, we visited and consulted selected health
research, air quality testing, academic, and environmental organizations.
Our approach included the independent review and verification of WTC air
monitoring and bulk dust data. For example, we randomly selected monitoring
results posted on EPA’s web site and traced the test results back to the raw data to
verify the accuracy of the information posted. Further, we selected certain data
from EPA’s “NYC Response” database and determined whether it was included
on EPA’s public web site.
Our approach included a synthesis of WTC-related research reports, independent
legal interpretation of applicable statutes and regulations, and independent
analysis of EPA technical decisions used in interpreting and presenting air quality
information. We interviewed key officials within and outside of EPA who
collected, analyzed, interpreted, or made decisions with WTC air monitoring and
bulk dust data, as well as environmental and medical external experts. We
conducted our field work during the period June 2002 through July 2003. We
5 Report No. 2003-P-00012
NYC-WTC_000145360
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