Documentation establishing Tier I, II, and III action levels for lead and other contaminants based on EPA and HUD guidance.
NYC-WTC_000140645Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
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_000140645
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000140817
Document describing the expanded monitoring program approach using existing regulations to define action levels for indoor air.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.980
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.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.908
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140819
Table defining Tier I, II, and III lead air concentration thresholds with actions ranging from aggressive cleaning to no further action.
1 shared topics · Same agency, volume and box · similarity 0.905
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140818
Table defining Tier I, II, and III lead dust thresholds in settled dust with corresponding cleaning or monitoring actions.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.905
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
1 shared non-person entities · 1 shared topics · similarity 0.946
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
1 shared non-person entities · 1 shared topics · similarity 0.945
machine-extracted · confidence unavailable · Check page ↗1 shared non-person entities · 1 shared topics · similarity 0.918
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.
1 shared non-person entities · 1 shared topics · similarity 0.918
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.
1 shared non-person entities · 1 shared topics · similarity 0.905
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000142716
Log of DEP activities coordinating with other agencies for street clean-up and determining road reopening status.
Similar document embedding; no shared entity or topic indexed. · similarity 0.905
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164784
Transmission of revised asbestos sampling results for residential samples collected November-December 2001.
1 shared non-person entities · 1 shared topics · similarity 0.902
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164835
DEP memo forwarding draft benchmark levels for indoor contaminants of concern developed by DHHS, EPA, and OSHA for interagency review and approval.
1 shared non-person entities · 1 shared topics · similarity 0.900
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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NYC-WTC_000140640
Notice instructing staff to preserve original World Trade Center documents as potential evidence in future legal actions against the City.
Filed in the same folder
NYC-WTC_000140641
Agenda for a meeting discussing status of activities, public requests, and development of sampling and cleaning plans for WTC debris.
Filed in the same folder
NYC-WTC_000140642
Introduction to a cross-agency group tasked with identifying contaminants of concern and establishing health-based screening levels for the indoor environment.
Filed in the same folder
NYC-WTC_000140643
Documentation describing the methodology for identifying contaminants of concern using historical data and qualitative toxicity screens.
Filed in the same folder
NYC-WTC_000140644
Summary of contaminants removed from the review list due to being non-detectable or found only in trace amounts, including all VOCs.
Filed in the same folder