NYCDOH/ATSDR asbestos residential sampling results, Apr 2002

NYC 9/11 Public Portal Document

J. T

I L 04/03/02 DRAFT: not for public release Ambient and Indoor Sampling for Public Health Evaluations of Residential Areas Near World Trade Center, New York, New York (November 4 - December 11, 2001) Results were compared to dust and air levels found in homes located in "non-impacted" areas and to indoor asbestos standards. At each sampled building, attempts were made to sample in a common area, two residences, and an adjacent outdoor location. I ___ '

Dust: If PLM was less than 1%*, confirmation by TEM was performed. If TEM was less than 1%, no further action was taken. I If TEM was greater than 1%, JurHieracUon wa^kem If PLM was greater than 1%, confirmation by TEM was unnecessary and further action was taken. ------------------------------------------------------------------------------------------------------ --------------------------------------------------- ------------------------------------------------------------------------------------------------- 1—----------------------------------- --------------------------------------------- ---------- ------------------------

Air: ___________ If PCM was less than 0.003** f/cc, no further action was taken.____________________________________ ________ If PCM was greater than 0.003 f/cc, confirmation by TEM was performed._____________________________ ________________________ If TEM was less than 0.01 f/cc, no further action was taken._________________________ _ __ If TEM was greater than 0.01 f/cc (did not occur), further action would have been needed. If PCM is greater than 0.01*** f/cc, confirmation by TEM was performed. ~ I i ~ • A material is considered to be asbestos-containing materiai if it contains more than 1% asbestos using the PLM method. r ''~r ____ _ When asbestos was detected, only Chrysotile asbestos was found •• 0.003 is the upper range (0.001 - 0.003) of background indoor air fiber concentrations determined in non-impacted areas. •** Asbestos clearance criteria. Rules of the City of New York, Title 15. Chapter 1.

Results for Asbestos in Air and Settled Dust

Building Asbestos in Asbestos In Location Fibers in Air I Number Dust Dust

Residential Buildings in Lower Manhattan

Building 1 PLM [%] TEM [%) PCM [f/cc] TEM [f/cc] 1 Outside ND Not Sampled 0.001 NA 1 Common Not Sampled Not Sampled <.001 NA 1 Resi ND Not Sampled 0.006 <001 1 Res 2 ND Not Sampled <.001 NA Building 1 Notes: PCM results at Res 1 exceeded 0.003 f/cc. Asbestos fibers were not detected in this sample by TEM analysis. There was not enough material left to analyze the outdoor and residential dust samples by TEM.

Building 2 PLM [%] TEM [%] PCM [f/cc] TEM [f/cc] 2 Outside <1 1.2 0.003 NA 2 Common ND Not Sampled 0.005 <.001 2[Res 1 ND Not Sampled <.001 NA ^Res2 ND Not Sampled 0.002 NA 2|WindowSill <1 <1 NA NA 2 Outside X 1.3 NA Not Sampled NA Building 2 Notes: DEP inspected and found asbestos-containing material in the outdoor location which was then professionally abated. _________________ PCM results exceeded 0.003 f/cc in the common area. Asbestos fibers were not detected in this sample by TEM analysis. There was not enough material left to analyze the indoor dust samples by TEM.

Building 3 PLM [%) TEM [%] PCM [f/cc] TEM [f/cc] 3 Outside Not Sampled Not Sampled <.001 NA

NYC-WTC_000164778