Report detailing silica sample results and OSHA limit exceedances during demolition activities at the World Trade Center parking garage.
NYC-WTC_000144633–000144638Folder label: “NADLER”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Bespirable Silica: The overwhelming majority 861 silica samples (excluding l>vlk and bliuik s’
samples} show no detectable levels of aiibome silica. However, 54 exposucres' exceeded the PEL. The hipest sample result was approximatiriy twenty-one times the OSHA limit (jack hammmuig concrete 16 feet below grade). The other elevated exposures were approximately one to founeen tunes the OSHA limit. These cs^oeurae ocenrred during: 1) pre-drilling /sluny wall 2) jack haaunsring, rubble removal and loading operations near the "Winter Garden; 4) during the breaking up of concrete in the pit; 5) while drillmig ths concrete slutty wall, 6) flagging operations in pit, and 7) adtile chippies concrete with power tools during donolition activities at ? WTC’s parking garage. Moat of the work areas where apparent overexposures lo silica occurred were in the rubble pfle/^nt; an area where OSHA continuec to tocomnge the use ctT respiratory protectioa. Organic Compoumis: OSHA has taken a total of 652 samples (excluding bulk and blank samples) for organic compounds such as acetaldehyde, acrolein, acryioaitxilc, benzene, 2-butanone, carbofiifans, dioxin, PCBs, eth>d benzene, formaldehyde. Freon R-22 (chlorodiflouromefhane), hexone, isocyanates (e.g. MDl TOI), perchloroEthylene, polynuclear aromatics, phosgene, styrene, toluene, 1-3 butadiene, trichlorodhyiene, vinyl chloride, glutaraldehydfi, and xjdeae. Screening samples initially showed elevated levels of some organic chemicals resulting from the fixes burning in the rubble pile. Subsequent personal and area somplex show weaker exposure levels to be below OSHA limits. However, one personal sample result for a benzene sample taken was found to be at the 8-hr. OSHA Allowable Limit cooceafration of 1 ppm. This was found on a backhoe operator moving debris on lQ/7/01. See infonnatiaa below for the specific counts in regards to polynuclear aromatics. Freon R-22, phoegeoe and dioxin.
Dioxins: OSKA has taken 10 dioxin samples (axclodiag blanks) in deplume over hot spots in (and around the perimeter of) the nibble pile. Dioxi* levels detected
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NYC-WTC_000144643
Agenda for a conference on the public health impact of September 11, featuring presentations from EPA, OSHA, and DOH officials.
18 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000144639
Memorandum from elected officials requesting agency attendance at a town hall meeting to address air and dust quality concerns.
6 shared non-person entities · Same agency, volume and box · similarity 0.953
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000144741
Standard administrative notice requiring the retention of original World Trade Center records as evidence for future legal actions.
13 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.941
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147410
Fax listing confirmed attendees and questions for an Environmental Protection committee hearing.
14 shared non-person entities · 1 shared topics · similarity 0.947
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000143803
Agenda for a February 14, 2002 meeting chaired by FEMA to address health concerns of responders and citizens.
7 shared non-person entities · similarity 0.944
machine-extracted · confidence unavailable · Check page ↗4 shared non-person entities · 1 shared topics · similarity 0.943
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000148742
Notice instructing staff to preserve original World Trade Center documents for potential legal actions against the City.
13 shared non-person entities · similarity 0.943
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147351
Facsimile transmission from the Mayor's Office regarding a task force proposal and confirming meeting locations at City Hall for Lower Manhattan recovery.
7 shared non-person entities · 1 shared topics · similarity 0.943
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147326
Letter from the EPA requesting a DEP representative to provide testimony at an Ombudsman investigative hearing.
2 shared non-person entities · similarity 0.940
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000143791
Program outline for delivering public information about environmental conditions and cleanup progress in Lower Manhattan following the WTC disaster.
7 shared non-person entities · 1 shared topics · similarity 0.940
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000143770
A memo announcing a public forum to discuss the joint Federal and City residential cleanup program for Lower Manhattan.
6 shared non-person entities · similarity 0.940
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149798
Generic form or header page from the Department of Environmental Protection regarding general World Trade Center notices and requests.
17 shared non-person entities · 1 shared topics · similarity 0.940
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_000144631
Legal directive instructing staff to preserve original World Trade Center documents as evidence.
Filed in the same folder
NYC-WTC_000144632
Correspondence from the NYC Council on the Environment including a legal notice to preserve World Trade Center documents.
Filed in the same folder
NYC-WTC_000144639
Memorandum from elected officials requesting agency attendance at a town hall meeting to address air and dust quality concerns.
Filed in the same folder
NYC-WTC_000144641
Cover sheet for a fax transmission from EPA Region 2 regarding World Trade Center environmental matters.
Filed in the same folder
NYC-WTC_000144643
Agenda for a conference on the public health impact of September 11, featuring presentations from EPA, OSHA, and DOH officials.
Filed in the same folder