NYC 9/11 Public Portal Document
Asbestos Containing Material
(ACM): Asbestos or any material containin
asbestos. g more than one-percent
Clearance Air Monitoring
Employment of aggressive
to determine the airborne sampling techniques with a
concentration of residual fi volume of aire collected
activity. as the final abate meat
ELAP: Environmental
Laboratory Approval P
rogram administered by the New
York State
Department of
EPA or USEPA: United
States Environmental
Protection Agency.
Homogeneous Work Area
of the Work Area that
type of abatement is used. contains one type of ACM
and/or where one
Phase Contrast Microscopy
PCM" shall mean the
content of air. For PCM measurement protocol for the
analysis, the clearance air assessment for the fiber
sample is less than or equal to monitoring shall be considered
0.01 f/cc or the background satisfactory when eve
concentrations, whichever is rY .. :
greater.
Polarized Light Microscopy: PLM
shall mean the
asbestos content of bulk measurement protocol for the
materials. For PLM analysis, the
1 .070. New Yor City and EP assessment for the
A Reg ulatory limit is
Transmission Electron Microscopy:
the asbestos fi ber content of " M"shall mean the
air. For TEtNI analysis, measurement protocol for the
the clearance air monitoring assessment for
satisfactory when the requirements shall hr rt?nsidered
stated in 40 CFR Part 763
For the p u rPoses of our testing Subpart E. Appendix A.
the regulatory li m i t is 70 asbestos structures per Section IV are met
rnrr)2.
4.0 Scope of Work
4.I Bulk Sampling
Procedures
ALC's licensed technicians
worked under the guidance provid ed
asbestos-";sbe tos in Buildin s: SirnDli by the EPA gui
1' Sam lin Scheme for
This sampling procedure or Friable Surfac lines
uses random sampling to nkeMater
sampling area. ALC's i nspectors: ensure that the sam les are representati ve of the
F
I. Identified all li able surfacing
materials and grouped then)
areas by floor into homogenous
sampling
2. : Prepared diagrams of
each sampling area
3 Determine the number of
samples to collect (9 samples
recommended) Determine sampling per homogenous areas
locations are
. 4. ; Collect samples
S. Fill out chain of
custody
6. :Send samples to a
qualified laboratory
Due to the insufficient
amount of dust and debris in
building, we were unable to collect the apartment units and
the Optimum number of public areas of the
referenced guidelines samples suggested i n the above
Upon completion of the initial
assessment and bulk sample
were elevated asbestos levels in six collection ALC determined
apartments" With the guidance of that the re
document and NYCDEP we the above referenced
went back to each fl oor and
visible dust and debri s. assessed each apartment on each
floor for
, rl
NYC-WTC 0001 17726
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