VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

VI.b.4. New York City Department of Environmental Protection Sampling of Indoor Dust and Air The New York City Department of Environmental Protection (NYCDEP) has gathered indoor dust and air sampling data from numerous building owners/managers as part of their Asbestos Control Program. Sampling procedures and analytical methods vary from building to building making data summary difficult. For settled dust, bulk samples were generally obtained and analyzed for percent asbestos content. Many buildings report pending results. Available data indicate non-detect or trace amounts of asbestos in most locations. In general, asbestos concentrations were low especially when compared with occupational standards. Most sample analyzed by PCM (NIOSH 7400) were below 0.01 fZcc while most samples analyzed by TEM (AHERA) were below 70 S/mm^

VI.b.5. New York City Board of Education Sampling of Schools At the request of the Board of Education (BOE), ATC Inc. conducted bulk dust/wipe and indoor air sampling during the time period December 2001 to March 2002 in the following WTC area schools: Stuyvesant HS (345 Chambers St), HS of Economics and Finance (100 Trinity Place), HS for Leadership and Public Service (90 Trinity Place), PS 150 (334 Greenwich St), PS 234 (292 Greenwich St), and PS/IS 189 (201 Warren St). A limited amount of asbestos bulk dust samples were obtained from these schools. No samples taken from inside the schools exceed 1% asbestos. One sample from PS/IS 189 taken from outside the building exceed 1% asbestos and one sample taken from debris on the roof of PS 234 exceeded 1% asbestos. Wipe samples were obtained and analyzed for a host of contaminants including lead, chromium, cyanide, PCBs, dioxin, silica and fibrous glass. With few exceptions, levels were below health-based guidelines/standards. Exceptions included: P S 150 had one lead sample from a window well that exceeded HUD guidelines; HS of Economics and Finance had multiple lead wipes that exceeded HUD guidelines; Stuyvesant HS had lead samples from the 5* and 6* floor that exceeded 40 pg/ft^ on 02/06/02, but follow-up sampling the next day were below HUD guidelines.

All six schools were repeatedly sampled (samples from Stuyvesant began on 9/21/01) for asbestos in air by AHERA TEM protocols. All samples were below the AHERA standard of 70 S/mm^ with the following exceptions; HS for Leadership and Public Service - (2/23/02) 956 S/mm^ found in the 2”'' floor auditorium; (2/24/02) 2,379 S/mm^ found in the basement gym; (2/26/02) 978 S/mm^ found in the basement gym. Two follow-up samples taken from the gym on 2/28/02 were non detect.

All six schools were repeatedly sampled for respirable particulates (PM 2.5). Most schools had multiple days that exceeded the 24 hr standard for sensitive subpopulations (40 pg/m’) but few exceeded the 24 hour standard of 65 pg/m^.

DRAFT-DO NOT QUOTE OR CITE 134 October 2002

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