Subpart 1.
General.
Procedures for the use of the decontamination unit must be
established by the person performing abatement to prevent contamination outside
the asbestos work area. A decontamination unit must be used by all persons when
exiting a containment. The decontamination unit must:
A. be contiguous with the containment area
except as provided in subpart 2;
B.
consist of a series of connecting rooms with the middle room being the shower
room;
C. have doorways between the
rooms and entrances to the unit protected with two overlapping sheets of
polyethylene or the functional equivalent; and
D. have a shower room that:
(1) is leakproof;
(2) contains a series of water filters with
the last filter capable of collecting particles of 5.0 micron or
less;
(3) is supplied with hot and
cold water adjustable at the tap; and
(4) is supplied with soap and disposable
towels.
Subp.
2.
Location.
In facilities classified in the Standard Industrial
Classification Manual, 1987, as a B division, D division-major group 26, or E
division-major group 49, the decontamination unit must be connected to the
containment where feasible. The Standard Industrial Classification Manual,
1987, is available from the National Technical Information Service, 5285 Port
Royal Road, Springfield, Virginia, 22161, or from the State Law Library,
Minnesota Judicial Center, 25 Rev. Dr. Martin Luther King Jr. Blvd., St. Paul,
Minnesota 55155.
Subp. 3.
Waste.
Filtered wastewater from the shower must be discharged to a
sanitary sewer or a septic system, or may be collected in barrels for later
disposal to a sanitary sewer or septic system.
Subp. 4.
Small residential
decontamination unit.
For small residential abatement, the decontamination unit
must consist of at least a clean room, shower room, and dirty room.
Subp. 5.
Decontamination
unit other than small residential abatement.
For abatement in a facility other than small residential
abatement, the decontamination unit must consist of a clean room, an air lock
chamber, a shower, an air lock chamber, and a dirty room.
