Law Department notice on WTC document preservation, Oct 2001

NYC 9/11 Public Portal Document

An experienced individual to act as a site health and safety supervisor to respond to unanticipated health hazards that may be encountered on the site and to ensure implementation of required health and safety practices.

6.2 In addition to the above minimum requirements, the duct cleaning professional shall meet the following contaminant-specific requirements:

6.2.1 Man-made Vitreous Fibers - appropriate Hazard Communication training and personal protective equipment 6.2.2 Crystalline Silica - appropriate Hazard Communication training and personal protective equipment 6.2.3 Lead - appropriate Hazard Communication training, ability to perform personal exposure monitoring for airborne lead, ability to comply with requirements of 29 CFR 1910.1025 6.2.4 Asbestos (< 1%) - - appropriate Hazard Communication training, ability to perform personal exposure monitoring for airborne asbestos, ability to comply with requirements of29 CFR 1910.1001

6.3 All workers shall possess current EPA-accredited training as an Asbestos Worker (32-hour training) or as an Asbestos Supervisor (40-hour training).

7.0 GENERAL PERFORMANCE REQUIREMENTS

In general, all cleaning of air moving equipment and active plenums shall be performed under negative pressure using HEPA-filtered air filtration devices. All ducts that are cleaned shall be maintained under negative pressure using HEPA-filtered vacuum collection equipment specific to the duct cleaning industiy. Air filtration devices and vacuum collection equipment shall be exhausted to the outdoors. After cleaning of the ventilation system, any areas that are affected by the work must be as clean or cleaner than their condition prior to the start of work, and must meet post-cleaning verification requirements contained in 8.2 of this document.

7.1 Containment: WTC-related dust and debris removed by cleaning/remediation process shall be collected and precautions taken to ensure that the debris is not otherwise dispersed outside the ventilation system during cleaning. After cleaning of the ventilation system, any areas that are aflTected by the work must be as clean or cleaner than their condition prior to the start of work.

7.1.1 When working outside the negative air pressure system the ventilation system/duct cleaning firm shall install plastic sheeting on the floor surface under and at a minimum of 3 feet outside the perimeter of the system. All exposed service tools and equipment shall be free of debris and contamination from the ventilation system. Tools and equipment include (but are not limited to): Vacuum collection equipment, vacuum hoses and attachments, air lines and hoses, brushes, extension rods, cables, ladders, power tools, hand tools, zoning devices, and inspection equipment.

7.1.1.2 Contaminated tools and equipment shall be maintained in poly bags until cleaned in the designated decontamination area at the work site.

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NYC-WTC_000145209