16 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗Document / 13 pages
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
OCR text
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
1) Expanded from ambient air monitoring program - need to address long-term as well as acute/subchronic exposures
- Tiered Approach
Tier I - action level Tier II - review Tier III - clearance
- Used existing regulations/guidance where applicable
Examples:
NAAQS for Pb (1.5 ug/m^) - action level for indoor air
HUD Pb Standard for floors (40 ug/ft2) - action level for interior dust
- Otherwise developed risk-based screening levels
Tier I > E-04 cancer risk x 1 yr exposure duration Tier II E-04 x 1 yr - E-04 x 30 yr Tier III < E-04 x 30 yr (or background)
NYC-WTC_000164865
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000164865Source: NYC Law Department, mirrored locally
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Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
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Table establishing risk-based screening levels for polycyclic aromatic hydrocarbons in settled dust with corresponding remediation actions.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140823
Table establishing Tier I, II, and III thresholds for dioxin in indoor air with associated cleaning actions.
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