NYCDOH/ATSDR residential asbestos sampling results November-December 2001

NYC 9/11 Public Portal Document

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 I ‘I Dust: ! . .| If PLM was less than 1%*, confirmation by TEM was performed. If TEM was less than 1%. no further action was taken. If TEM was greater than 1%, further action was taken. __________ ______ If PLM was greater than 1%, confirmation by TEM was unnecessary and further actlon was taken.

- -H - Alr: If PCM was less than 0.003** f/cc, no further action was taken. - 4______ + If PCM was greater than 0.003 f/cc, confirmation by TEM was performed. -T 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. ________ ______

• A material is considered to be asbestos-containing material if it contains more than 1% asbestos using thePLM method. 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. J __________

Results for Asbestos in Air and Settled Dust

Asbestos in Asbestos In ' ™ Asbestos In Location Fibers in Air Number Dust Dust Air

Residential Buildings In Lower Manhattan I 1 ■-

I Building 1 4 --4- PLM [%] TEM [%] PCM [f/cc] TEM [f/cc] ----- 4 ■ ■ -f - - 1 Outside ND Not Sampled J 0.001 NA 1 Common Not Sampled Not Sampled <.001 NA 1 Res1 ND Not Sampled 0.006 <.001 4 -- 1 Res 2 ND Not Sampled ; <•001 NA -- t 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 I 2 Common ND Not Sampled 0.005 <.001 2 Res1 ND Not Sampled <.001 NA r - - 4 - 2 Res 2 2 Window Sill ND <1 Not Sampled <1 0.002 NA NA 41 p- “ : . - . --------- 2 Outside X 1.3 NA Not Sampled NA ; ] f- 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. I' There was not enough material left to analyze the Indoor :dust samples ■ by TEM. I ■ ; ! ----------------- r- -*■ -- . t I ; ; : .. -- -i- Building 3 PLM [%] TEM [%] PCM [f/cc] TEM [f/cc] 3 Outside Not Sampled Not Sampled <.001 NA

NYC-WTC_000139702