Mont. Admin. R. 17.74.357 - STANDARDS AND METHODS FOR CLEARING ASBESTOS PROJECTS AND REQUIREMENTS FOR PERSONS CLEARING ASBESTOS PROJECTS
(1) At
the conclusion of any asbestos project conducted in a facility, the owner of
the facility or the owner's designee shall ensure that final visual inspection
and air clearance sampling are conducted in all asbestos project work
areas.
(2) The concentration of
asbestos fibers in air clearance samples collected pursuant to (1) must be:
(a) less than or equal to 0.01 fibers per
cubic centimeter of air for each of five samples collected within the work
area, if analyzed by PCM. The PCM analysis must be conducted using the NIOSH
7400 or NIOSH 7402 method; or
(b)
less than or equal to the average concentration of 70 structures per square
millimeter for five samples collected within the work area, if analyzed by
transmission electron microscopy (TEM). The TEM analysis must be conducted
using EPA's interim TEM analytical methods provided in 40 CFR 763, subpart E,
appendix A.
(3) Final
visual inspection and clearance sampling and analysis must be conducted as
follows:
(a) a person performing a final
visual inspection and final air clearance sampling shall:
(i) observe the entire asbestos project area
to verify that the asbestos project contractor has removed all visible
asbestos-containing waste, dust, and debris from the work area;
(ii) require any necessary recleaning by the
asbestos project contractor and conduct subsequent visual inspections that
verify that the asbestos project contractor has removed all ACM identified in
the asbestos project permit and related asbestos-containing waste, dust, and
debris from the work area; and
(iii) complete a signed, written affidavit
verifying that the asbestos project contractor has removed all ACM identified
in the asbestos project permit and related asbestos-containing waste, dust, and
debris;
(b) a person
collecting final air clearance samples shall:
(i) ensure final clearance air sampling and
testing are not performed until after the final visual inspection has been
completed in accordance with this rule;
(ii) once the work area has passed the final
visual inspection, sweep an air stream from a high-speed blower or equivalent
air-blowing device across all surfaces in the work area for a time adequate to
disturb air in all areas of the work area prior to beginning final air
clearance sampling;
(iii) ensure
the air is continually agitated, creating maximum air disturbance in all
potentially occupied areas, i.e., continually running fans, during the
collection of final air clearance samples. Agitating the air in the work area
prior to final air clearance sampling is not required for unoccupied areas such
as crawl spaces; and
(iv)
immediately after agitating the air in the work area, begin collecting at least
five final clearance air samples in the work area;
(c) for an asbestos project with more than a
single isolated work area within a large space contained by four walls and a
ceiling, the owner or operator of a renovation or demolition activity shall
ensure the isolated work areas are sampled by taking at least one air sample
within each isolated work area. If more than five isolated work areas are used
in a space contained by four walls and a ceiling, at least five aggressive air
samples must be collected. The first four air samples must be gathered from
those isolated work areas where the greatest potential for asbestos exposure
exists; the fifth sample must be taken in the last isolated work area in which
the asbestos project occurred;
(d)
for asbestos projects employing glovebags, the owner or operator of the
renovation or demolition activity shall have at least one aggressive air sample
collected in the immediate area of each glovebag, with at least five air
samples collected for each space contained by four walls and a ceiling. If more
than five glovebags are used in a space contained by four walls and a ceiling,
at least five air samples are required for that space. The five samples must be
gathered from areas where the greatest potential for asbestos exposure
exists;
(e) the asbestos project
may not be cleared until after the final visual inspection and after the
results of all required air clearance samples demonstrate that asbestos
concentrations do not exceed the applicable concentration specified in
(2);
(f) persons conducting a final
visual inspection and final air clearance sampling and testing shall record:
(i) the names of the asbestos project
contractor/supervisor and the person or persons conducting final visual
inspection and final air clearance sampling;
(ii) the name and address of the facility
site and location of the asbestos project;
(iii) the number of the asbestos project
permit issued by the department;
(iv) the date of final visual inspection and
final air clearance sampling;
(v)
whether the work area was aggressed;
(vi) the number of samples
collected;
(vii) the type of
samples (i.e., PCM or TEM);
(viii)
a statement of whether final visual inspection and final air clearance sampling
has documented the completion of the asbestos project;
(g) the final visual inspection and air
clearance sampling report must include the signatures of the project
contractor/supervisor and final air clearance sampling person attesting to the
completion of the asbestos project; and
(h) the results of the final visual
inspection and final air clearance sampling and testing must be maintained by
the asbestos project contractor and by the person who performed the sampling
and must be made available to the department within five working days of a
request for the results.
(4) For asbestos projects with final air
clearance sampling, the person conducting final air clearance sampling shall:
(a) collect five samples of air, with each
sampling at least 1,199 liters of air, by using an air sampling pump capable of
drawing a volume that is equal to or greater than 1,199 liters of air through
each of the five millimeter filters, at a rate equal to or greater than one
liter and less than ten liters per minute for TEM samples and equal to or
greater than one liter and less than 16 liters per minute for PCM
samples;
(b) ensure that the flow
rate for each air sampling pump is calibrated at the beginning and end of the
sampling period; and
(c) ensure air
sampling cassettes are placed four to six feet above the floor at a 45 degree
angle down. The cassettes must be uniformly distributed throughout the work
area. At least one cassette must be located in each room. If the asbestos
project was conducted in more than five rooms, a representative sample of rooms
must be selected. Each cassette must be subject to normal air circulation,
avoiding room corners, walls, ceilings, obstructed locations, and sites near
windows, doors, or vents.
(5) If the background level of asbestos, as
identified by the thorough inspection required in ARM
17.74.354(1), is
determined to exceed the maximum allowable concentration in (2), the department
may issue a written waiver from (3)(e) upon receipt of a written request in
advance of the asbestos project.
(6) An asbestos project is considered
complete when the final visual inspection documents no residual visible ACM,
dust, or debris is present, and the results of clearance air sampling meet the
requirements of (2).
(7) Air
samples required by this rule may be analyzed only by laboratories accredited
by the American Industrial Hygiene Association (AIHA) or laboratories that
participate in the AIHA proficiency analytical testing (PAT) program and that
have received a "proficient" rating for asbestos PCM samples, or another
laboratory accepted in writing by the department. For sampling and sample
analysis, a quality assurance program must be implemented as described in the
NIOSH 7400 method or another quality assurance program accepted in writing by
the department. PAT results must be submitted to the department upon
request.
(8) PCM analyses required
by this rule may be conducted only by a person certified in the NIOSH 582 or
582E sample collection and analytical method and who participates in a round
robin quality assurance/quality control program for PCM analysts or another
certification or quality assurance/quality control program accepted in writing
by the department in advance.
(9)
TEM sample analyses required by this rule must be conducted by a laboratory
accredited by the National Voluntary Laboratory Accreditation Program or a
laboratory accredited by an equivalent accreditation program that is accepted
in advance by the department in writing.
(10) Proposed alternate standards and methods
for clearing asbestos projects that provide results at least as accurate as the
standards and methods set forth in (1) through (9) may be used if approved in
advance by the department in writing. Requests for approval to employ alternate
standards and methods must be submitted in advance to the department on a form
provided by the department.
(11) A
person performing a final visual inspection and final air clearance sampling:
(a) must be accredited by the department as
an asbestos project worker or asbestos project contractor/supervisor;
and
(b) may not be contractually
associated with the asbestos project contractor, and there may not be any
common ownership or employment relationship between the person or entity
carrying out the asbestos project and the person or entity conducting the final
clearance or sampling and analysis operations.
Notes
75-2-503, MCA; IMP, 75-2-503, MCA;
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