NYC 9/11 Public Portal Document
Protection Agency analysis method number SW846-'742O and. the National Institute of
Occupational Safety and Health method number 7082M. '
The lead-in-dust samples were obtained by gently wiping a pre-measured surface area
with non-alcohol moistened towelettes. ATC’s representative wore disposable gloves; a
new glove was worn with each new sampling procedure, and care was taken to avoid
contamination of the towelette and collection vial. Towelettes were then placed into
50ml plastic vials and immediately sealed. The chain of custody form was completed and
documents the measurement of the area sampled.
Results of Dust Wipe Sampling
Nine (9) dust wipe samples were collected from areas indicated to ATC. Laboratory
analysis is shown that all dust wipe samples collected from the indicated areas contain lead
on floor and window sill surfaces below the guideline level of 40 pg/fL and 250 pg/ft^
respectively. See laboratory report and chain of custody for more details.
Limits of the limited dust wipe sampling
Dust sampling was conducted at NYC-DOE request. The results of this report are
applicable for the time the testing was performed. If questions arise concerning lead
content in or on components and/or locations not tested by ATC, then additional testing
services should be procured. ATC makes no representation or warranty concerning the
standards and specifications provided in the HUD Guidelines and the NYC-DOE
protocol. 7
It is our pleasure to provide these limited lead services to New York City Department of
Education. If you have any questions regarding this limited lead-in-dust wipe sampling,
please do not hesitate to call me at (212) 353-8280 extension #211.
Sincerely,
ATC Associates, Inc.,I ,
/Yiannis Efstathibu
Senior Project Manager
P.Y 124M
C7ATC
ASSOCIATES INC.
September JI, 2002
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NYC-WTC_000202544
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