WTC emergency safety plan draft, Sept 2001

NYC 9/11 Public Portal Document

World Trade Center Emergency Project Environmental, Safety, and Health Plan Draft - Revision A 30 September 2001

Table 4b: Modified Wet Bulb Globe Temperature Values - Moderate Work Load Reflects Heat Exposure Threshold Limit Values in “C and “F (WBGT) Summer Coveralls or Coveralls or Rain Coveralls or Moderate Work Tyvek® Tyvek® Work Rain Suit No Suit w/PAPR or Rain Suit w/Full Load* No Respirator w/any Respirator Uniform Respirators Half Mask Face Respirator Clothing Correction 0 -2 -4 -6 -6 -10 FC) Continuous Work, <26.700 <24.7“C <22.7°C <20.700 <20.70C <16.70c (15 mn. rest every 2 hrs) <80.0OF <76.5OF <72.9OF <69.3OF <69.3OF <62.1 OF

75% Work/25% Rest, 26.8-28.0°C 24.8-26.0oC 22.8-24.0‘’C 20.8-22.0°C 20.8-22.0“C 16.8-18.00c (Each Hour) 80.1-82.0°F 76.6-78.2OF 73.0-75.2<’F 69.4-71.60F 69.4-71.6°F 62.2-64.4OF

50% Work/50% Rest, 28.1-29.4‘>C 26.1-27.400 24.l-25.40C 22.1-23.40c 22.1-23.40c 18.1-19.40c (Each Hour) 82.1-85.0‘’F 78.2-81.3°F 75.3-77.70F 71.7-74.1OF 71.7-74.1 OF 64.5-66.90F

25% Work/75% Rest, 29.5-31.1°C 27.5-29.10C 25.5-27.1‘’C 23.5-25. rC 23.5-25.100 19.5-21.1°C (Each Hour) 85.1-88.0OF 81.4-84.40F 77.8-80.8°F 74.2-77.2°F 74.2-77.2°F 67.0-70.0OF

*Moderate Work Load: Wa/king about with moderate lifting and pushing, carrying materials (200-350 kcal/hr)

1.4.2.3 Noise:

Exposure to high noise levels is a potential hazard associated with the operation of heavy equipment, power tools, generators, compressors, pumps and similar activities that may be performed by the contractors. Exposure to intermittent high noise levels exceeding accepted standards may result in hearing loss.

Whenever noise levels are measured or anticipated to exceed a time-weighted average (TWA) of 85 decibels as measured on the A scale (dBA), worker protection against the effects of noise exposure shall be provided in accordance with 29 CFR 1910.95 or 29 CFR 1926.52 as appropriate. Administrative or engineering controls shall be provided where feasible. If such controls fail to reduce exposure to below 85 dBA TWA, appropriate hearing protection shall be provided and the work area or equipment shall be posted with warning signs to alert workers to the requirement for hearing protection use.

For high noise activities (greater than a TWA of 85 dBA), a written hearing conservation program meeting the requirements of 29 CFR 1910.95 is required and shall be implemented for affected personnel.

1.4.2.4 Manual Lifting:

There will be numerous opportunities for personnel working at the WTC Emergency Project to handle/lift and move objects and structures of varying weights and sizes. Proper lifting techniques shall always be used when manual lifting is required. Personnel shall always seek assistance and/or use material handing equipment/devices when a load is determined to be too heavy or large to be safely lifted alone. Proper lifting techniques will be provided in the JHA for the task.

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