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Ambient Dust Sampling Protocol Near WTC, Oct 2001

Machine-extracted title · confidence 95%

Draft protocol for assessing airborne and settled dust exposures in residential areas following the World Trade Center collapse.

NYC-WTC_000153258–000153278
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'2 o o ****DRAFT Version 10, October 29, 2001**** ■D c CT o' cn "0 o o KJ CJ> Sample/Analytical Methods 9L O Parameter Environmental.Media Sampling/Analytical Method Sample Flow/time Analytical LOD / LOQ* o o c 3 Asbestos** I/O*** air NIOSH 7400, NIOSH 7402 16L/min-4hr(3840L) 0.010 fee (LOQ) o 3 Breathing zone sample height 5 hr (4800L) 0.008 fee 6hr(5760L) 0.007 fZee Total Suspended O '’ir EPA Method # (continuous realtime) 12-hr Particulates Breathing zone sample height ON HOLD? PM 10 and PM2..^ O air EPA Method # (continuous real-time) 12-hr ON HOLD? Breathing zone sample height Inhalable (< 100pm) I/O air lOM personal sampler. Analyze each 2 L/min -5 hr (600L) 30 ug / 50 ug/m’ thoracic (<10pm) fraction for crystalline silica, gypsum, respirable (<2.5pm) fiberglass, and calcite (XRD) Respirable I/O air NIOSH 7500 2.5 L/'min-5.3 hr(800L) 5 ug / 6 ug/m’ crystalline silica

pH I/O dust EPA SW 846 Mtd 9045C (soils) 10-25 g

asbestos I/O dust NIOSH 9002 (PLM), and if <1%TEM silica, gypsum, I/O dust XRD (C

gypsum, fiber­ glass, calcite

LODiLimit of analytical detection; LOQ: Limit of analytical quantitation ** use professional ju> yement re: asbestos sampling times to avoid filter overload (collection of 2 samples with different sampling times may be necessary) *** I: indoor; O: outdoor

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NYC-WTC_000153264Source: NYC Law Department, mirrored locally

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