NYC 9/11 Public Portal Document
5. Findings and Conclusions
Twenty-one
Twenty-one (21) initial background air samples were collected and analyzed at building 200.
microscopy (PCM) and twelve (12) were re-analyzed via
(21) were analyzed via phase contrast
transmission electron microscopy (TEM). All were below the permissible limits.
them via
Based on EPA Guidelines, we collected one hundred ninety-nine (199) bulk samples and analyzed
Sixteen (16) samples collected from six (6) apartments
Polarized Light Microscopy (PLM) Methodology.
samples that were
were found to be slightly above the regulatory limits of 1%. Of the sixteen (16) bulk
were found to be above the regulatory limits upon further analysis at a
found to be above the limits, zero (0)
second laboratory for quality control purposes.
Methodology. The
One hundred eighty-two (182) air samples were collected and analyzed via TEM
below <70 structures Per mm2
results indicated that the living areas achieved the acceptance criteria
set by the above regulations.
6. Limitations and Exclusions
work conducted and
All the professional opinions presented in this report are based solely on the scope of
in our report. The data presented by ALC in this report was collected and analyzed
sources referred to
generated. This report
using generally accepted industry methods and practices at the time the report was
represents the conditions, locations, and materials that were observed at the time the fieldwork was
conducted. No inferences regarding other conditions, locations, or materials, at a later or earlier time may
other warranty, express or limited is made. ALC's liability
be made based on the contents of the report. No
subcontractors, arising from any services rendered hereunder, shall not
and that of its contractors and
of
exceed the total fee paid by the client to ALC for this project. This report was prepared for the sole use
use of this report by anyone other than our client or ALC is strictly prohibited without the
our client. The
report.
expressed written consent of ALC. Portions of this report may not be used independent of the entire
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