OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
December 17, 2002 114 LIBERTY STREET REMOVAL OF DUST, DEBRIS, AND CONTAMINATED MATERIALS
feet of floor space over 25,000 square feet, plus appropriate blanks, shall be collected both inside and outside each work area and analyzed for Asbestos.
2. Clearance air sampling shall be performed utilizing aggressive methods as described below:
a. Before starting the pumps, the exhaust of forced-air equipment shall be directed against all walls, ceilings, floors, ledges and other surfaces in the work area. This pre-sampling agitation shall continue for at least five minutes per 1,000 square feet of floor space.
b. At least one 20-inch (minimum sized) fan shall be placed in the work space and operated at slow speed while pointing towards the ceiling. A minimum of one fan per 10,000 cubic feet of room space shall be used.
3. Clearance wipe sampling shall not commence until at least one hour after the completion of the air sampling and the removal of the fans from the work area.
C. Post-abatement clearance wipe sampling shall include the following number of samples:
1. At least one wipe sample for every 10,000 square feet of floor space, with a minimum of three (3) samples, plus appropriate blanks, shall be collected in each work area and be analyzed for both Dioxins/Furans and for the previously listed metals.
D. Monitoring requirements and procedures are as follows:
1. The sampling zone for indoor air samples shall be representative of the building occupants' breathing zone.
2. If possible, outdoor ambient and baseline samplers should be placed about 6 feet above the ground surface in reasonable proximity to the building and away from obstructions and drafts that may unduly affect airflow.
3. Air sampling equipment shall not be placed in corners of rooms or near obstructions such as furniture.
4. Samples shall have a chain of custody record.
E. Work Area Clearance
1. Acceptance Air Clearance Criteria: Decontamination of the work site meets the requirements of this test when the following airborne concentrations are achieved:
Parameter Clearance Level Note Asbestos 70 s/mm^ As set forth in the AHERA standard
2. Acceptable Surface Clearance Criteria: Decontamination of the work site meets the requirements of this test when the following surface concentrations are achieved:
24 © AMBIENT GROUP, INC. - 2002 AIR AND WIPE SAMPLING
NYC-WTC_000155741
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NYC-WTC_000155525
Initial draft of the comprehensive scope of work required to safely clean 114 Liberty Street following environmental damage.
53 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 1.000
machine-extracted · confidence unavailable · Check page ↗49 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗48 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155168
Draft cleaning procedures and contract documentation for 114 Liberty with minor revisions, shared with EPA for review and comment.
12 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.976
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155394
Transmission of cleanup and environmental monitoring documentation for 114 Liberty post-WTC dust remediation project.
14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138892
Forwarding draft cleaning procedures for 114 Liberty Street to EPA for review and comments.
12 shared non-person entities · 1 shared topics · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000107535
Resident request for DEP to perform cleaning and monitoring work at an apartment in Manhattan.
17 shared non-person entities · 1 shared topics · similarity 0.972
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NYC-WTC_000155525
Initial draft of the comprehensive scope of work required to safely clean 114 Liberty Street following environmental damage.
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NYC-WTC_000134871
EPA Region 2 letter regarding revised environmental work plan submission for two buildings including asbestos, health, and safety assessment components.
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