Illinois Administrative Code › Title 77 - PUBLIC HEALTH › Part 855 - ASBESTOS ABATEMENT FOR PUBLIC AND PRIVATE SCHOOLS AND COMMERCIAL AND PUBLIC BUILDINGS IN ILLINOIS › Subpart E - LOCAL EDUCATIONAL AGENCY RESPONSIBILITIES AND STANDARDS FOR ABATEMENT › Section 855.440 - Maintenance of Decontamination Enclosure Systems and Workplace Barriers

Current through Register Vol. 48, No. 28, July 12, 2024
a) Following
				completion of the construction of all polyethylene barriers and decontamination
				system enclosures, the contractor, or his designated representative, and
				project manager shall allow a minimum of six hours settling time to ensure that
				barriers will remain intact and secured to walls and fixtures before beginning
				actual abatement activities. The negative air pressure equipment shall be in
				operation during this settling time.
b) All polyethylene barriers inside the work
				area, in the worker decontamination enclosure system, and in the equipment
				decontamination enclosure system, and partitions constructed to isolate the
				work area from occupied areas, shall be inspected by the contractor and project
				manager at least twice daily. The barriers shall be inspected before the start
				of and following the completion of the day's abatement activities. Inspections
				and observations shall be documented in all project log books.
c) Damage and defects in the enclosure system
				shall be repaired upon discovery.
d) Smoke tubes shall be used by the
				contractor to test the effectiveness of the work area barrier system before
				abatement work begins and at least once a day thereafter until the work is
				completed. The project manager shall observe the test. Results and observations
				shall be documented in all project log books.
e) At any time during the abatement
				activities after barriers have been erected, if visible emissions are observed
				outside of the work area or if damage occurs to barriers, work shall stop,
				repairs shall be made to the barriers, and visible residue cleaned up using
				appropriate HEPA vacuuming and wet mopping procedures prior to resuming
				abatement activities.
f) The
				contractor shall HEPA vacuum or wet clean the equipment decontamination
				enclosure system and the entire worker decontamination enclosure system at the
				end of each day of abatement activities.
g) If air samples collected outside of the
				work area during abatement activities indicate airborne fiber concentrations
				greater than original background levels or 0.01 f/cc as determined by PCM, work
				shall stop for inspection and repair of barriers. Cleanup of surfaces outside
				of the work area using HEPA vacuums or wet cleaning techniques shall be done.
				Air sampling shall indicate a fiber concentration less than background levels,
				or below 0.01 f/cc as determined by PCM, prior to resuming abatement
				activities. (See Section 855.340(b)(2)(B)(iii).)
h) Negative pressure ventilation equipment
				shall be installed and operated to provide a minimum of four air changes in the
				work area every hour. Openings made in the enclosure system to accommodate
				these units shall be made airtight with tape and/or caulking. If more than one
				ventilation unit is installed, units shall be turned on one at a time while
				checking the integrity of wall barriers for secure attachment and the need for
				additional reinforcement. A power supply shall be available to satisfy the
				requirements of the ventilating units. Negative pressure ventilation units
				shall be exhausted to the outside of the building away from occupied areas.
				Twelve inch extension ducting shall be used to reach from the work area to the
				outside of the building when ducting is required. Careful installation, air
				monitoring and daily inspections by the contractor and project manager shall be
				done to insure that the ducting does not release fibers into uncontaminated
				building areas.
i) Once constructed
				and reinforced, and with negative pressure ventilation units in operation,
				worker and equipment decontamination enclosures shall be tested for leakage by
				the contractor, utilizing smoke tubes. The project manager shall observe these
				tests. Enclosures shall be repaired or reconstructed as needed. Results and
				observations shall be documented in all project log books.
j) The contractor shall identify and maintain
				emergency and fire exits from the work area.