Technical review of mold and bacteria laboratory results and draft assessment for 114 Liberty with recommendations for letter revision.
NYC-WTC_000163174–000163181Folder label: “E-mails 2003 M. Gilsenan”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
71,592
Front Office
Microvacuum
1
743,552
Blank
Microvacuum
2
803
ND= asbestos not detected
The interpretation of these results is constrained by the scientific uncertainty regarding the potential for the measured concentrations in settled dust to become airborne. There are no standards currently available for assessing potential health consequences from asbestos through the evaluation of wipe or microvacuum samples. A scientific peer review panel (World Trade Center October 21- 22, 2002 Peer Review Meeting Notes. Available at www.tera.org.) recently evaluated the technical soundness of estimating airborne asbestos concentration as a function of asbestos concentration in settled dust for the purpose of setting health-based benchmarks. The panel recommended against such an approach based on the significant uncertainty associated with the numerous factors (such as activity patterns, sample location, surface characteristics, air exchange rates and room volume) that influence this relationship. EPA's use of surface wipe and microvacuum sampling at its WTC Residential Confirmation Cleaning Study site (110 Liberty St) was intended to provide a measure of cleaning effectiveness, and not a risk-based health assessment.
Risk from asbestos is directly related to its concentration in air. Consequently, post-cleaning aggressive (i.e., use of a leaf blower and fans) air sampling was conducted at 114 Liberty St. by DEP's contractors to insure that asbestos levels in air met risk-based clearance criteria.
The EMSL analytical report does not provide detailed information on sample collection, however, it appears many samples were collected from inaccessible areas below the hardwood flooring, or from areas of unknown accessibility such as wall tracking, pipe shafts and I-beams. The scope of work developed for the clean up activities was designed for the removal of 5
NYC-WTC_000163178
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000163168
EPA correspondence transmitting draft letter to FEMA regarding 114 Liberty with attached documentation and data receipt timeline.
17 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163186
Correspondence regarding corrections to FEMA documentation, focusing on proper indoor and outdoor wipe sampling procedures for environmental testing.
21 shared non-person entities · Same agency, volume and box · similarity 0.983
machine-extracted · confidence unavailable · Check page ↗21 shared non-person entities · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160455
Document with WTC cleanup analytical data and minimum concentration information for 114 [address], transmitted to FEMA.
18 shared non-person entities · similarity 0.978
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149537
Instructions and sections for collecting sample location data from a specific building interior.
11 shared non-person entities · 1 shared topics · similarity 0.968
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154948
Federal agencies respond to resident concerns regarding the validity of environmental clearance data for 114 Liberty Street.
20 shared non-person entities · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149432
DEP asbestos project notification form and inspection report dated December 12, 2002.
11 shared non-person entities · 1 shared topics · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151361
A letter defending the validity of DEP and contractor data used to clear residential units at 114 Liberty Street for re-occupancy.
18 shared non-person entities · similarity 0.963
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155002
Federal agencies respond to resident concerns regarding the validity of environmental clearance data for 114 Liberty Street.
20 shared non-person entities · similarity 0.963
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000125801
Cover sheet for a fax transmission from DEP regarding the 105 Duane Street site file.
9 shared non-person entities · 1 shared topics · similarity 0.962
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000106330
Letter reporting asbestos testing results for air and dust at Borough of Manhattan Community College in February 2002.
9 shared non-person entities · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164732
Draft spreadsheet of asbestos sampling results from residential locations collected November-December 2001, circulated for review.
10 shared non-person entities · similarity 0.961
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_000162712
Official notice instructing staff to preserve scanned World Trade Center documents as potential evidence in future legal actions.
Filed in the same folder
NYC-WTC_000162713
Official notice instructing staff not to dispose of original World Trade Center documents as they are required for legal proceedings.
Filed in the same folder
Filed in the same folder
NYC-WTC_000162729
DEP submits OSHA compliance justification document for review regarding worker safety in WTC cleanup procedures.
Filed in the same folder
NYC-WTC_000162731
EPA submits detailed technical questions and comments on proposed HVAC cleaning procedures for WTC buildings.
Filed in the same folder