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ATSDR/DHAC protocol for ambient and surface dust sampling near WTC,

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Draft protocol establishing procedures for evaluating airborne and settled dust in residential and commercial areas near the World Trade Center.

NYC-WTC_000152825–000152834
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“0 o c o o Sample/Analytical Methods [NOTE: screening levels dictate detection/quantitation limit needs] CT o' cn "0 KJ o 00 GO Parameter Environmental.Media Sampling/Analytical Method Sample Flow/time Analytical LOD / LOQ* 9L O Asbestos I/O** air NIOSH 7400, NIOSH 7402 16L/min-4hr(3840L) 0.010 free (LOQ) o o Breathing zone sample height 5 hr (4800L) 0.008 free c 3 6 hr (5760L) 0.007 free CD 3 Total Suspended O air EPA Method # (continuous realtime) 24-hr Particulates Breathing zone sample height

PM10andPM2.5 O air EPA Method # (continuous real-time) 24-hr 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 asbestos,(TEM), and for respirable (<4pm) crystalline silica, gypsum, fiberglass 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 PLM, and if <1% TEM

asbestos, gypsum, I/O dust XRD mica, fiberglass calcite

* LOD:Limit of analytical detection; LOQ: Limit of analytical quantitation ** I: indoor; O; outdoor

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NYC-WTC_000152831Source: NYC Law Department, mirrored locally

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NYC-WTC_000153247 · Box DEP Box 26

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

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