16 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.969
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COC/[name] update document introduction, April 2002
Machine-extracted title · confidence 100%Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
NYC-WTC_000164862–000164874Page image
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NYC 9/11 Public Portal Document
Tier Screening Value Basis Action I >.03 ng/m^ *Risk-based screening level Aggressive cleaning - if for residential setting levels persist, take additional (E-04 X lyr)______________ action to reduce exposure II .001 ng/m^ (orbackground) .001 ng/m^ -* Risk based Maintain recommended - .03 ng/m^ screening level for residential (diligent wet/HEPA) cleaning setting methods -consider additional (E-04 X 30 yr) monitoring III < .001 ng/m^ (or Determination of local No further action background) background
*based on proposed dioxin cancer slope factor
Asbestos
Level Recommended actions Comments Air level: Evaluate the need to Screening value in air set at a >0.01 f/cc * remove sensitive level where short term individuals from the exposures (< 1 year) may
Settled Dust environment
Evaluate conditions in the result in exposures which contribute to V'? level: area including Settled dust threshold is to > 100,000 representativeness of air protect to at least a IXIO"^ f/cm^ samples, fibrous glass dust risk estimate for a one year levels and loading. exposure. Air concentrations estimated for different Take actions to reduce activities using a K factors
NYC-WTC_000164871
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NYC-WTC_000164871Source: NYC Law Department, mirrored locally
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