NYC 9/11 Public Portal Document
U.S. Environmental Protection Agency
Air / Bulk / Wipe/ Water Sampling Situation Report
Monday, October 1, 2001 (3:00 pm)
Fixed Ambient Air Sampling Locations (Asbestos)
• NYC / ER (Sept 28, 12 noon - 12 midnight)
0 6 of 17 samples were above the NYC reentry standard for PCM. All 17 samples were
below the TEM standard.
• NYC / ER (Sept 29, 12 midnight - 12 noon)
0 7 of 16 samples were above the NYC reentry standard for PCM. 2 of the 16 samples
were above the TEM standard (Locations E and K).
• NJ (Sept 29, 9:45AM - Sept 30, 10:30AM)
0 All 4 samples were below both the PCM and TEM standards.
Landfill Air Sampling Locations
• Fresh Kills (Sept 29, 7:00AM - 7:00PM) - Asbestos
o All 11 samples were below both the PCM and TEM standards.
• Fresh Kills (Sept 28, 29) - Particulate Monitoring
o Nothing of significance to report based on average daily concentrations.
o No data collected on Sept. 27, 30, and October 1 due to weather conditions.
Ambient Air Sampling Locations (Metals)
• NYC / ER (Sept 27)
o Ten samples collected.
o 1 sample exceeded the National Ambient Air Quality Standard (1.5 ug/m3 based on a
24 hour, 3 month period) for lead at Barclay/West Broadway, however does not exceed
the NIOSH standard.
o Lead level lower than sample previously taken at that location (and two other
locations).
o Chromium levels were identified at 9 locations above the EPA Removal Action
guidance levels. However, all levels were below the removal action level adjusted to a
1-year exposure duration and do not exceed the most conservative NIOSH chromium
standard (1 ug/m3).
o Although the lead and chromium levels are elevated, they are not a short-term concern.
0 Regulatory standards and guidelines for lead and chromium are based on long-term
exposure.
Ambient Air Sampling Locations (TAGA - volatile organics)
• NYC / ER (Sept 30)
o Benzene exceeded OSHA TWA PEL (0.5 ppm) at two locations on the debris pile in
the plume at ground level (across from Liberty/Greenwich).
NYC-WTC 000130435
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