VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

Historical concentrations of metals, VOCs, PM, dioxin, PCBs, carbon monoxide (CO), nitrogen dioxide (NO2), and sulfur dioxide (SO2) for the NYC area provided by EPA Region 2 and found otherwise in the open literature.

Air monitoring data for VOCs and PM that were not part of the EPA WTC monitoring data base were provided by the ORD National Exposure Research Laboratory (NERL) staff.

Reports and data developed by non-EPA Agencies involved in sampling at the WTC site, who used the data for their individual purposes. These data sets are described when appropriate and include, for example, the Occupational Safety and Health Administration (OSHA) Sampling Results Summary posted on their web site (http://www.osha.gov) on 8/15/02, the National Institute for Occupational Safety and Health (NIOSH) data base (CDC, 2002), and the Agency for Toxic Substances and Disease Registry (ATSDR) study of indoor residences (NYCDOHMH/ATSDR. 2002).

Appendix B shows a summary of the monitoring stations that provided air monitoring data to the EPA WTC monitoring database that is used in this assessment. Prior to the terrorist attack on September 11, air monitoring stations for PM already existed at a number of locations in NYC, including lower Manhattan, upper Manhattan, Brooklyn/Queens, the Bronx, and Staten Island, as well as New Jersey. Following the disaster, EPA’s Environmental Response Team set up monitoring sites at various locations near the WTC. The strategy employed in positioning the various “alphabet” monitoring sites was to place the monitors at varying distances surrounding, but near. Ground Zero. These alphabet monitoring sites are listed first in Appendix B. Pollutants that have been measured at these locations include polycyclic aromatic hydrocarbons (PAHs), dioxins, asbestos, PCBs, metals, silica, and PM. The second major set of monitoring stations listed in Appendix B were established by NYSDEC. These sites have been designated by numbers to contrast with the alphabet sites. Generally, these sites were further from Ground Zero. Pollutants monitored at these sites included particulates, VOCs, dioxins, asbestos, aldehydes, and particle size fractions. In addition, EPA’s National Exposure Research Laboratory (NERL) set up monitoring at three of the alphabet sites (A,C, and K) and at site 16 where monitoring generally for particulates (and metals), VOCs and particle size fractions was conducted. Finally, the New Jersey Department of Environmental Protection assisted in the monitoring of asbestos at nearby locations in New Jersey

Laboratories contracted by EPA have conducted most of the pollutant analyses, but EPA laboratories have done some of the analyses, including some of the dioxin and particulate analyses. The EPA laboratories that have participated in this effort include NERL’s Human Exposure and Atmospheric Sciences Division (HEAS) in Research Triangle Park, NC, and the Region 7 Environmental Services Division in Kansas City, KS.

Information on the monitoring procedures and the data includes several other details, such as dates of monitoring, different monitoring and analytical procedures, and other issues that are specific to the pollutants. These pollutant-specific issues are discussed in each of the pollutant sections. Also, each section includes a map showing only those sites where monitoring

DRAFT-DO NOT QUOTE OR CITE 21 October 2002

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