NYC 9/11 Public Portal Document
Appendix K
Indoor Air and Dust Test Results
EPA conducted indoor air monitoring and indoor dust wipe sampling in the weeks after the
collapse. This EPA indoor air monitoring (prior to the FEMA-funded residential cleanup) was
limited primarily to testing for asbestos in buildings. EPA’s dust wipe sampling tested for
metals, PCBs, and dioxin.
On September 13,2001,14 air samples were collected from 26 Federal Plaza, 290 Broadway,
and Chase Manhattan Plaza, and analyzed for asbestos. All samples were analyzed by TEM and
the results converted to PCM equivalent readings in fibers per cubic centimeter (f/cc). One of the
14 samples exceeded the New York City standard for asbestos clearance of .01 ftcc
(see Table K-1).
Table K-1: Indoor Air Test Results from September 13,2001
PCM Analysis TEM Analysis
Sample
Sample Volume f/mm2 8«».S-5 Hi
Adtbess IP -JS— f/cc Hl
Chase Manhattan Plaza 571 np na na 0.0098 na na na
26 Federal Plaza (13th floor) 16370 np na na 0.0064 na na na
26 Federal Plaza {13th floor) 16371 np na na <0.0033 na na na
26 Federal Plaza (Lobby S.) 16372 np na na 0.0072 na na na
26 Federal Plaza (Lobby W.) 16373 np na na 0.0037 na na na
26 Federal Plaza (39'" floor) 16374 np na na <0.0038 na na na
26 Federal Plaza (38®' floor) 16375 np na na <0.0039 na na na
26 Federal Plaza (26®’ floor) 16376 np na na <0.0038 na na na
290 Broadway (8®’ floor)
290 Broadway (Lobby)
290 Broadway (22"® floor N.)
290 Broadway (22"® floor S.)
27490
27491
27492
27493
s
np
na
na
na
na
na 0.0042
na <0.0043
na <0.0041
na 0.004
na
na
na
na
na
na
na
na
na
na
na
na
np
290 Broadway {LL-1) 27494 np na na 0.013 na na na
290 Broadway (LL-2) 27495 np na na 00044 na na na
KEY:
np = sample volume not provided on data sheets.
na= not analyzed for this metric.
NOTES:
[1] = sample volume for TEM {AHERA method) is 1200 liters for 25 mm filter
[2] = fibers per millimeter squared
[3] = structures equal to or greater than 0.5 micrometers and less than or equal to 5 micrometers in length
[4] = structures greater than 5 micrometers in length
During the period September 17 to November 3,2001, EPA collected dust wipe samples within
four buildings: Stuyvesant High School, Public School 234, Manhattan Borough Community
College, and the Jacob Javits Convention Center. The samples were analyzed for various metals
at all locations, while at Stuyvesant and the Community College samples were also collected and
analyzed for PCBs and dioxin. Fifty-four percent of the sample results were below the minimum
93 Report No. 2003-P-00012
NYC-WTC_000145613
OCR can misread numbers and units. Confirm readings against the page image before using them.