Report establishing health-based screening levels for the indoor environment with cross-agency representation.
NYC-WTC_000151128–000151140Folder label: “CONTRACTS CONTRACTORS - See: $ matrics etc file”
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 Tierll -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/ft^). action level for interior dust
- Otherwise develop *d 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)
I
NYC-WTC_000151131
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NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
15 shared non-person entities · 1 shared topics · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗13 shared non-person entities · 1 shared topics · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162222
EPA staff distributed an environmental laboratory report to federal and city agencies on May 15, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140651
Documentation setting dioxin action levels for indoor air and providing initial guidance on asbestos fiber concentration risk estimates.
3 shared non-person entities · 1 shared topics · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140649
Documentation defining action thresholds for PAHs in indoor air based on residential risk assessments and background concentrations.
1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140647
Table defining action thresholds for lead in indoor air using NAAQS and background values to determine required cleaning measures.
3 shared non-person entities · 1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
14 shared non-person entities · 1 shared topics · similarity 0.953
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164877
Proposal detailing a survey to assess seven preliminary contaminants in 100 buildings within a four-block radius of the World Trade Center site.
5 shared non-person entities · 1 shared topics · similarity 0.951
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164830
DEP internal memo circulating draft EPA screening level standards for asbestos, fiberglass, and silica in indoor air and settled dust for agency comment.
4 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140648
Table establishing risk-based screening levels for polycyclic aromatic hydrocarbons in settled dust with corresponding remediation actions.
2 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140650
Table outlining risk-based screening levels for dioxins in settled dust with specific cleaning requirements for exceeding thresholds.
3 shared non-person entities · 1 shared topics · similarity 0.949
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.
2 shared non-person entities · 1 shared topics · similarity 0.949
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
Page similarity is temporarily unavailable or this page has no indexed vector.
Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.
A notice instructing that original World Trade Center documents must be preserved as evidence and not disposed of due to potential legal actions.
Filed in the same folder
Letter confirming contractor responsibility for cleaning residences and HVAC systems in accordance with project scope.
Filed in the same folder
Confidential cover sheet from the U.S. Environmental Protection Agency regarding a specific confirmation item.
Filed in the same folder
NYC-WTC_000151148
EPA coordination memo regarding identification and contact of eligible apartment requests for WTC testing and cleaning.
Filed in the same folder
Summary of issues raised by contractors including chain of custody, mold, lead paint, and payment disputes.
Filed in the same folder