Health and safety plan Part II, 30 Warren Street, January

NYC 9/11 Public Portal Document

Regulatory Submittal Part III — Health & Safety Plan Fiterman Hall — 30 West Broadway, New York, New York Airtek Project 05-0867 — January 10, 2006

Figure 7-1

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Personnel shall not be exposed to airborne chemical contaminants such that their short term or time- weighted average exposure exceeds OSHA "Permissible Exposure Levels" or ACGIH "Threshold Limit Values" for the chemicals of concern. To avoid the need for upgrade of personal protection equipment due to airborne contamination, engineering controls such as the use of water to minimize dust levels will be implemented as necessary during abatement activities.

The required level of protection may be modified based on airborne monitoring. All assessments shall incorporate industrial hygiene principles. Engineering controls shall be used prior to assignment of respiratory protective equipment. Signs shall be posted at entrances to areas where airborne chemical contaminants levels exceed, or have the potential to exceed, 25% of the applicable exposure limit.

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NYC-WTC 000096654