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DEP asbestos testing standards and microscopy methods, Oct 2001

Machine-extracted title · confidence 95%

Overview of DEP standards for asbestos testing using PLM, PCM, and TEM microscopy methods for bulk and air samples.

NYC-WTC_000144123

Folder label: “PICTURES/ PRESENTATIONS

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ASBESTOS STANDARDS Ca5 9L O o o c 3 o 3

• POLARIZED LIGHT MICROSCOPY(PLM) - For bulk samples & the sm is greater than 1% • PHASE CONTRAST MICROSCOPY (PCM) - For air samples & the re-occupancyTs O.Olfibers/cc • Transmission Electron Microscopy (TEM) A - For air samples & the re-occupancy std. Is 70 structures/ square millimeter There is no indoor or outdoor std for asbestos.

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NYC-WTC_000144123Source: NYC Law Department, mirrored locally

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NYC-WTC_000144017 · Box DEP Box 07

Presentation slide outlining DEP activities including assessment, coordination with agencies, and street opening procedures.

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