Asbestos Abatement >> How To Remove Tiles With Asbestos

Preparing the Work Area Disabling HVAC Systems: The power to the heating, ventilation, and air conditioning systems that service the How To Remove Tiles With Asbestos restricted area must be deactivated and locked off. All ducts, grills, access ports, windows and vents must be sealed off with two layers of plastic to prevent entrancement of contaminated air. 

Operating HVAC Systems in the Restricted Area: If components of a HVAC system located in the restricted area are connected to a system that will service another zone during the How To Remove Tiles With Asbestos project, the portion of the duct in the restricted area must be sealed and pressurized. 

Necessary precautions include caulking the duct joints, covering all cracks and openings with two layers of sheeting, and pressurizing the duct throughout the duration of the How To Remove Tiles With Asbestos project by restricting the return air flow. The power to the fan supplying the positive pressure should be locked "on" to prevent pressure loss. 

Sealing Elevators: If an elevator shaft is located in the restricted How To Remove Tiles With Asbestos area, it should be either shut down or isolated by sealing with two layers of plastic sheeting. The sheeting should provide enough slack to accommodate the pressure changes in the shaft without breaking the air-tight seal. Removing Mobile Objects.

All movable objects should be cleaned and removed from the work area before an How To Remove Tiles With Asbestos enclosure is constructed unless moving the objects creates a hazard. Mobile objects will be assumed to be contaminated and should be either cleaned with amended water and a HEPA vacuum and then removed from the area or wrapped and then disposed of as hazardous waste. 

Cleaning and Sealing Surfaces: After cleaning with water and a HEPA vacuum, surfaces of stationary objects should be covered with two layers of plastic sheeting. The sheeting should be secured with duct tape or an equivalent How To Remove Tiles With Asbestos method to provide a tight seal around the object. 

Bagging Waste: In addition to the requirement for immediate bagging of waste for disposal, it is further recommended that the waste material be double-bagged and sealed in plastic bags designed for asbestos disposal. The bags should be stored in a How To Remove Tiles With Asbestos waste storage area that can be controlled by the workers conducting the removal. 

Filters removed from air handling units and rubbish removed from the area are to be bagged and handled as How To Remove Tiles With Asbestos hazardous waste. Constructing the Enclosure The enclosure should be constructed to provide an air-tight seal around ducts and openings into existing ventilation systems and around penetrations for electrical conduits, telephone wires, water lines, drain pipes, etc. 

Enclosures should be both airtight and watertight except for those openings designed to provide entry and/or air flow control. Size: An How To Remove Tiles With Asbestos enclosure should be the minimum volume to encompass all of the working surfaces yet allow unencumbered movement by the worker(s), provide unrestricted air flow past the worker(s).

Ensure walking surfaces can be kept free of tripping hazards. Shape: The enclosure may be any shape that optimizes the flow of ventilation air past the worker(s). Structural Integrity: The walls, ceilings and floors must be supported in such a manner that portions of the How To Remove Tiles With Asbestos enclosure will not fall down during normal use. 

Openings: It is not necessary that the structure be airtight; openings may be designed to direct air flow. Such openings should be located at a distance from active removal operations. They should be designed to draw air into the How To Remove Tiles With Asbestos enclosure under all anticipated circumstances. 

In the event that negative pressure is lost, they should be fitted with either HEPA filters to trap dust or automatic trap doors that prevent dust from escaping the How To Remove Tiles With Asbestos enclosure. Openings for exits should be controlled by an airlock or a vestibule. 

How To Remove Tiles With Asbestos Barrier Supports: Frames should be constructed to support all unsupported spans of sheeting. Sheeting: Walls, barriers, ceilings, and floors should be lined with two layers of plastic sheeting having a thickness of at least 6 mil. 

Seams: Seams in the sheeting material should be minimized to reduce the possibilities of accidental rips and tears in the adhesive or How To Remove Tiles With Asbestos connections. 
All seams in the sheeting should overlap, be staggered and not be located at corners or wall-to-floor joints. 

Areas Within an Enclosure: Each How To Remove Tiles With Asbestos enclosure consists of a work area, a decontamination area, and waste storage area. The work area where the asbestos removal operations occur should be separated from both the waste storage area.

See paragraph (j) of this section for requirements for hygiene facilities. During egress from the work area, each worker should step into the How To Remove Tiles With Asbestos equipment room, clean tools and equipment, and remove gross contamination from clothing by wet cleaning and HEPA vacuuming. 

The contamination control area by physical curtains, doors, and/or airflow patterns that force any airborne contamination back into the How To Remove Tiles With Asbestos work area. Before entering the shower area, foot coverings, head coverings, hand coverings, and coveralls are removed and placed in impervious bags for disposal or cleaning. 

Airline connections from airline respirators with HEPA disconnects and power cables from powered air-purifying respirators (PAPRs) will be disconnected just prior to entering the shower room. Establishing Negative Pressure Within the How To Remove Tiles With Asbestos Enclosure Negative Pressure.

Air is to be drawn into the enclosure under all anticipated conditions and exhausted through a HEPA filter for 24 hours a day during the entire duration of the project. Air Flow Tests: Air flow patterns will be checked before removal operations begin, at least once per operating shift and any time there is a question regarding the integrity of the How To Remove Tiles With Asbestos enclosure. 

The primary test for air flow is to trace air currents with smoke tubes or other visual methods. Flow checks are made at each opening and at each doorway to demonstrate that air is being drawn into the How To Remove Tiles With Asbestos enclosure and at each worker's position to show that air is being drawn away from the breathing zone. 

Monitoring Pressure Within the Enclosure: After the initial air flow patterns have been checked, the static pressure must be monitored within the How To Remove Tiles With Asbestos enclosure. Monitoring may be made using manometers, pressure gauges, or combinations of these devices. 

It is recommended that they be attached to alarms and strip chart recorders at points identified by the design engineer. Corrective Actions: If the manometers or pressure gauges demonstrate a reduction in pressure differential below the required level, work should cease and the reason for the change investigated and appropriate changes made. The air flow patterns should be retested before How To Remove Tiles With Asbestos work begins again.

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