Environmental assessment report, 100 Church Street, April 2002

NYC 9/11 Public Portal Document

into the site specific human health risk assessment described previously in Section 4.4.5 and presented in Appendix B.

4.5.10 Biological Air samples were collected and analyzed for fungi and bacteria in the subcellar and cellar of 100 Church Street. Results of this effort are provided in a separate Microbiological Investigation Report dated March 8, 2002 and included in Appendix C of this report.

4.5.11 Fibers Air samples were collected and analyzed for fibers during the carpet removal to ensure compliance with OSHA standards during these activities. Most personal air samples were less than the OSHA standard of 0.1 fibers per cubic centimeter (f/cc) of air. Most area air samples were less than the NYCDEP clearance criteria of 0.01 f/cc. Any air sample results that exceeded the OSHA or NYCDEP standard were further analyzed by TEM to determine if the fibers were asbestos. None of the samples exceeded the applicable standard when analyzed for asbestos. A separate report has been prepared for analytical samples collected during carpet removal/replacement. This April 2, 2002 report entitled “Environmental Monitoring for Carpet Removal at 100 Church Street” is presented under separate cover.

4.5.12 Ethanolamine Air samples were collected and analyzed for ethanolamine during the carpet removal to ensure compliance with OSHA standards during these activities. All samples were less than the OSHA permissible exposure limit, separate report has been prepared for analytical samples collected during carpet removal/replacement. This April 2, 2002 report entitled “Environmental Monitoring for Carpet Removal at 100 Church Street” is presented under separate cover.

5.0 SAMPLES COLLECTED BY INTERNATIONAL TECHNOLOGY CORPORATION International Technology Corporation (IT) collected and analyzed one hundred and eighty-seven (187) air and surface samples within the NYCLD space. This work was completed prior to TRC’s work. All samples were collected before the HVAC system began operating. IT collected the following samples (number of samples for each analyte in parenthesis);

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