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WTC Wipe Sample Analysis Summary, June 2002

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Summary table of wipe sample results for silica, asbestos, PAHs, and other contaminants from various surfaces at the World Trade Center site.

NYC-WTC_000186268
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NYC 9/11 Public Portal Document

DRAFT Attachment 1 WTC Indoor Air/Environments Background Study Sampling Matrix Samples Numbers Shown are Per Unit Silica, Asbestos/ Total # Wipe Samples Lead Dioxins PAHs calcite, Total Dust MMVF Samples gypsum Ceilings 1 0 0 0 0 0 1 Walls 1 1 1 1 1 0 5 Bare floor 1 1 1 1 1 0 5 Counter tops or 1 1 1 1 1 1 6 furniture (table tops) Total Wipe 4 3 3 3 3 1 17 Samples/parameter

Silica, Micro-vacuum Asbestos/ Total # Lead Dioxins PAHs calcite, Total Dust Samples MMVF Samples gypsum Carpets or Drapery 3 3 0 0 0 0 6 Fabric Furniture 0 3 3 0 0 0 6 (couch or chair) Total Micro-vacuum 6 6 0 0 0 0 12 Samples/parameter 3 micro vacuum samples per location

Silica. Asbestos/ Total # Indoor Air Samples Lead Dioxins PAHs calcite, Total Dust MMVF Samples gypsum Main Living Space 2 1 0 0 1 0 4 (living rooms)

Silica, Asbestos/ Total # Bulk Dust Samples Lead Dioxins PAHs calcite, Total Dust MMVF Samples gypsum HVAC or AC window 1 1 1 1 1 0 5 unit filters

NOTES; MMVF - Man Made Vitreous Fibers Bulk samples for HVAC or window AC inits will be collected and analyzed for all parameters if sufficient volume is available. If volume is not sufficient analysis will be performed for asbestos only. This table does not include the 10% Quality Control samples. Total Number Of Samples Samples will be collected from 14 buildings, 3 units within each building (2 residences and 1 common area). 14 buildings x 3 units per building = 42 units 38 samples/unit x 42 units = 1596 samples + 160 QC samples = 1756 samples

CITY_21MC100_006820171

NYC-WTC_000186268

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NYC-WTC_000186268Source: NYC Law Department, mirrored locally

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