Current through Register Vol. 49, No. 13, September 23, 2024
Subpart 1.
Mini-containment.
When a portion of a project includes abatement of less than
25 linear feet of asbestos-containing pipe lagging or less than ten square feet
of asbestos-containing material per room, for that portion of the project, the
person performing abatement may use the mini-containment procedures in this
part instead of the procedures in parts 4620.3566 to 4620.3575.
In process areas of facilities not accessible to the general
public and designated in Division B, D, or E of the 1987 edition of the
Standard Industrial Classification Manual, asbestos-containing material may be
abated in quantities up to 25 linear feet or ten square feet for each 15,000
square foot area of floor space using the mini-containment procedures in this
part. Divisions B, D, and E of the 1987 edition of the Standard Industrial
Classification Manual are incorporated by reference and are not subject to
frequent change. A copy of this material is available from the State Law
Library, Minnesota Judicial Center, 25 Rev. Dr. Martin Luther King Jr. Blvd.,
St. Paul, MN 55155, or for loan or inspection from the Barr Library of the
Minnesota Department of Health or through the Minitex interlibrary loan
system.
Subp. 2.
Remote decontamination.
Before proceeding to the remote decontamination unit,
individuals performing mini-containment operations must:
A. remove the outer layer of clothing worn
during mini-containment abatement;
B. vacuum clean all exposed parts of the body
and hair using a HEPA-filter equipped vacuum cleaner; and
C. don a nonpermeable layer of protective
clothing which covers all body surfaces except the face and hands.
Subp. 3.
Remote
decontamination unit.
A remote decontamination unit must be available that complies
with part 4620.3569, subparts 1, items B to D, and 2. The remote
decontamination must be:
A. available
in the facility prior to the start of mini-containment operations;
B. used by individuals following
mini-containment operations for each asbestos work area; and
C. placed in an area to minimize
contamination of the area between the asbestos work area and the remote
decontamination unit.
Subp.
4.
Mini-containment set-up procedure.
All mini-containment operations must comply with this
subpart.
A. Before the
mini-containment operation begins, the area within ten feet of the
mini-containment operation must be cleaned using a HEPA-filter equipped vacuum,
wet wiping, or both, until no dust nor debris is visible.
B. A mini-containment must:
(1) be constructed of one layer of six-mil
polyethylene sheeting or comparable material;
(2) be equipped with a HEPA-filter equipped
vacuum or a HEPA-filter equipped ventilation system so air pressure within the
mini-containment is negative with respect to the air in the area outside the
mini-containment; and
(3) have all
seams in the polyethylene sheeting sealed.
Subp. 5.
Asbestos removal or
enclosure.
All persons using a mini-containment to perform abatement
must comply with this subpart.
A.
Negative air pressure within the mini-containment must be maintained until the
procedures in subpart 6, item G, are completed.
B. Surfaces from which asbestos-containing
material has been removed must be thoroughly cleaned until no visible
asbestos-containing material remains.
C. All exposed asbestos-containing material
within the mini-containment must be encapsulated according to part 4620.3572
before the mini-containment is removed.
Subp. 6.
Completion of mini-containment
operation.
Every mini-containment operation must be completed according
to the procedures in this subpart.
A.
All tools and equipment used in the mini-containment must be wet wiped until no
visible residue remains.
B. The wet
wiped tools and equipment must be passed through the mini-containment door in a
sealed, leakproof container.
C. The
leakproof container containing the tools must be opened only inside another
mini-containment, decontamination unit, containment, or when submerged under
water.
D. If the leakproof
container with the tools is transported off-site, the container must be labeled
as asbestos-containing material.
E.
After the asbestos removal, encapsulation, or enclosure is complete, the
interior of the mini-containment must:
(1) be
cleaned using HEPA-filter equipped vacuuming, wet wiped, or both; or
(2) have an encapsulant applied to the
interior of the mini-containment.
F. Before the mini-containment is removed, a
visual inspection of the interior of the mini-containment and the abated
surfaces must be performed as specified in part 4620.3575, subpart 2.
G. The mini-containment must be removed as
specified in this item. The mini-containment must be removed by:
(1) sealing the door and collapsing the
containment using a HEPA-filter equipped vacuum; or
(2) tearing down the mini-containment only
after the results of clearance air sampling performed according to parts
4620.3594 to 4620.3598 indicate that fiber levels within the mini-containment
do not exceed the clearance standard or alternative clearance standard in
either part 4620.3100, subpart 2b or 10a.
Statutory Authority: MS s
144.05;
326.70 to
326.81
