Summary of contaminants removed from the review list due to being non-detectable or found only in trace amounts, including all VOCs.
NYC-WTC_000140644Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
OCR status: ok · source: pdftotext
z z o o co
o o What’s off the List ■D c CT o o' 4^ ■D O O) 1) Many contaminants were either routinely ND or found in trace amounts O 3. 91 O 2) Categorical decision to delete all VOCs o o c 3 CD 2) Focus on select group of “high profile” chemicals for specific justification to delete:
Chemical Why Why Not Benzene high concentrations (>PEL) on pile mostly ND at perimeter of site PCBs historical lightening rod_________ serial air sampling all ND Mercury_______ Port Authority Police screening trace amounts in air/dust Chromium commonly detected in air sampling contamination of sample blanks PM (2.5 & 10) dust cloud numerous indoor sources
Benchmark Development Approach
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000140816
Document explaining the exclusion of VOCs and other chemicals from the contaminant of concern list due to trace amounts.
6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.932
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000141116
EPA news summary dated October 16, 2001, regarding environmental monitoring data collected from the World Trade Center site.
4 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.841
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000141114
EPA daily summary of environmental sampling and analysis for air, dust, water, and sediments at the World Trade Center site in October 2001.
4 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.838
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160878
EPA notice of chain-of-custody and benchmarks presentation for WTC Taskforce meeting on April 8, 2002.
6 shared non-person entities · 1 shared topics · similarity 0.875
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000150515
Report on volatile organic compound air samples collected by state and city health departments near the WTC site.
2 shared non-person entities · 1 shared topics · similarity 0.848
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.
5 shared non-person entities · 1 shared topics · similarity 0.848
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
2 shared non-person entities · 1 shared topics · similarity 0.847
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000150408
Memorandum regarding the FBI releasing vehicles from Ground Zero to Fresh Kills Landfill for investigation purposes.
4 shared non-person entities · 1 shared topics · similarity 0.836
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000148952
Table listing volatile organic compound (VOC) sampling sites and dates outside of Ground Zero from September 2001 to January 2002.
5 shared non-person entities · 1 shared topics · similarity 0.835
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000153816
Document titled Environmental Monitoring of New York City After the World Trade Center attacks, dated November 26, 2001.
3 shared non-person entities · 1 shared topics · similarity 0.834
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000144607
Correspondence regarding environmental health risks of spreading elemental mercury contamination through common cleaning equipment in April 1996.
2 shared non-person entities · 1 shared topics · similarity 0.834
machine-extracted · confidence unavailable · Check page ↗5 shared non-person entities · 1 shared topics · similarity 0.832
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_000140645
Documentation establishing Tier I, II, and III action levels for lead and other contaminants based on EPA and HUD guidance.
Filed in the same folder