A letter summarizing visual assessments of outdoor clean-ups and debris presence on buildings near the World Trade Center site.
NYC-WTC_000151401–000151406Folder label: “WTC DC TO RC LETTERS CALLEHAN WHITMAN ETC. WARD DOCTOROFF KENNY”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Roof Clean-Up
Application: This procedure utilizes wet methods and careful hygiene protocol for cleaning roofs contaminated with asbestos containing material (ACM).
1. The entire roof shall be considered the work area. All abatement will be performed by NYSDOL licensed contractors with NYC DEP certified workers.
2. A changing area consisting of two adjacent step-off pads located on the roof immediately adjoining die roof entrance/exit. This area shall consist of a clean pad and a change pad. The clean pad shall be adjacent to the building interior access way (or at the point of entry to the roof for exterior access). The change pad shall be adjacent to the contaminated roof areas. Each pad (change pad and clean pad) shall consist of two layers of 10-mil reinforced plastic on the roof/access way surface and shall be large enough to facilitate changing and decontamination as described herein. A minimum of 4’ X 4’ is recommend, though the exact configuration will be specific to the roof.
3. Workers shall first step from the building interior (or exterior at the point of entry to the roof) direutly onto the clean pad. On the clean pad, each worker shall be double suited with disposable coveralls, plastic booties, gloves, and head coverings. Rubber boots may be used instead of the plastic booties. The boots shall be wet wiped and HEPA vacuumed prior to leaving the roof. Each worker shall wear a minimum of a half-face air-purifying respirator equipped with HEPA cartridges.
4. All penetrations at the roof shall be cleaned by wet methods/HEPA vacuum and sealed with polyethylene sheeting.
5. Roof cleanup shall begin at the entrance/exit and proceed in a path working away from the entrance/exit. Water shall be the primary engineering control to minimize the potential for fiber release.
6. Roof surfaces shall be wetted and then wet cleaned using wet wiping techniques with water, mops, rags, brushes, etc. HEPA vacuuming may also be used as alternative to or in combination with wet cleaning.
7. Throughout the procedure, all personnel entering or existing the roof shall observe the personal decontamination practices. Attention shaP be paid to limiting unnecessary walking on or disturbance of material on the roof. These personal decontamination procedures shall be adhered to strictly in order to minimize the potential for spreading contamination to the interior of the buildings.
8. Solid nonporous objects, such as metal patio furniture, plant potters, and plastic furniture cushions, shall be wet wiped with damp rags. Wooden objects such as decking shall be HEPA vacuumed, wet wiped, and lightly brushed with a bristle brush utilizing simultaneous misting and local HEPA exhaust. Woven materials snail either be disposed as ACM or bagged and removed off-site for proper laundering in accordance with 29 CFR 1901. 1001. Potted plants with visual contamination should be disposed as ACM waste unless the owner requests decontamination. Potted plants will be repeatedly rinsed, and provisions shall be made to catch the runoff water (i.e. into ACM disposal bags or by using rags and HEPA wet-vacs).
9. Air Monitoring shall be performed by NYSDOL licensed a Third Party Air Monitoring firm with certified workers. At a minimum, air sampling shall be performed at the interior of the building entrance to the roof.
February 27, 2002
NYC-WTC_000151404
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NYC-WTC_000151612
EPA letter to DEP regarding visual assessments of building exteriors for debris in January and February 2002.
8 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000150839
Report on DEP and EPA visual assessments of debris on building exteriors in January and February 2002.
5 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000150846
Application form detailing cost estimates for asphalt and gravel roof clean-up per square foot.
6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.985
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000150987
Contract excerpt defining regulatory compliance requirements and describing visual assessments of debris on building exteriors near the World Trade Center.
6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.980
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163676
EPA communication to federal and NYC agencies regarding post-9/11 environmental response.
7 shared non-person entities · 1 shared topics · similarity 0.983
machine-extracted · confidence unavailable · Check page ↗7 shared non-person entities · 1 shared topics · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164936
Corrected contract addendum addressing errors in prior documentation updates.
6 shared non-person entities · 1 shared topics · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163668
DOH inquiry to DEP about EPA scope of work document and required addendum regarding ACM presumption language.
7 shared non-person entities · 1 shared topics · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · similarity 0.980
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164949
Contract documentation with addendum defining scope of work for environmental assessment.
6 shared non-person entities · 1 shared topics · similarity 0.979
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000143163
Application document outlining scope of work for building exterior cleanup in compliance with federal and state environmental regulations.
6 shared non-person entities · 1 shared topics · similarity 0.979
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164929
Contract document with addendum defining scope of work for environmental assessment or remediation activities.
6 shared non-person entities · 1 shared topics · similarity 0.979
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_000151341
Administrative notice requiring preservation of original World Trade Center documents as evidence for potential future legal proceedings.
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Letter reporting DEP air monitoring results for particulate and fiber at a specific agency office showing levels below detection.
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A memorandum outlining required procedures for building owners to follow when cleaning up debris and dust affected by the WTC attack.
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NYC-WTC_000151348
A memorandum outlining required procedures for building owners to follow when cleaning up debris and dust affected by the WTC attack.
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A DEP letter describing joint agency efforts to sample air, dust, and water in Lower Manhattan following the September 11 attacks.
Filed in the same folder