A.
Monitoring Requirements.
Asbestos abatement activities are subject to the following air and project
monitoring requirements:
(1) Air Monitoring.
Air monitoring, in the form of air clearance sampling, must be conducted for
all asbestos abatement activities. A project specific air monitoring plan,
including the mandatory air clearance sampling and optional additional area
monitoring, must be developed and used for each project and the plan must be
part of the project design. Any change(s) to the air monitoring plan must be
made by a certified Asbestos Air Monitor or Asbestos Abatement Design
Consultant and must become part of the project documentation. The air
monitoring plan must be designed in accordance with these rules by an Air
Monitor or Asbestos Abatement Design Consultant who has an independent business
relationship with the asbestos abatement company performing the project
whenever independent air clearances are required.
(2) Project Monitoring. Project Monitoring is
not required by these rules but may be required due to contractual or other
arrangement or specification. If an asbestos abatement activity is monitored,
then written records of all project monitoring activities shall be maintained
at the project site for the duration of the project and shall become part of
each owner's and operator's official records for that project. This project
monitoring documentation must be provided to the building owner within 6 months
of project completion.
(3)
Analysis. Air samples collected for air clearance sampling must be analyzed by
a Department-licensed Asbestos Analytical Laboratory as follows:
(a) Each air sample collected shall be
analyzed, as per the licensing section of this rule, by phase contrast
microscopy (PCM) or transmission electron microscopy (TEM), or other Department
-approved method; and
(b) For air
sample analyses, results obtained from the TEM methodology, described in
Appendix A to Subpart E, 40 CFR part
763, and shall be considered definitive
when results differ.
B.
Release of Regulated Area. A
regulated area may not be released from the contractor's control until no
visible debris remains in the regulated area, visual evaluations are completed,
air clearance sampling in accordance with this section is conducted, and
clearance standards are met. Visual evaluations and air clearances for an
asbestos abatement project involving more than 100 linear/square feet, or any
combination thereof, of ACM must be performed by an Asbestos Consultant. Visual
evaluations and air clearance sampling must be conducted by a certified
Asbestos Air Monitor employed by an Asbestos Contractor, In-house Asbestos
Abatement Unit, or Asbestos Consultant.
The following procedures shall be performed sequentially and
documented:
(1) Visual Evaluation of
Regulated Area. Following final abatement activities, including final clean and
removal of equipment, supplies, and waste, and prior to removal of any layer of
containment (if applicable) or glovebag and before conducting air clearance
sampling, a visual evaluation of the regulated area shall be conducted, as
specified below, to ensure that there is no visible dust or debris in the
regulated area, including the containment. The regulated area must be
completely drysuch that there is no visible evidence of water in the regulated
area prior to conducting the visual evaluation.
The individual conducting the visual evaluation where there
is a containment or glovebag shall:
(a) Inspect the decontamination facility
(including remote decontamination facilities) and waste load-out unit (where
applicable) to ensure there is no visible dust or debris present;
(b) Enter the regulated area/containment
where the asbestos abatement activity was performed;
(c) Get close enough to see and touch the
surfaces from which the ACM was removed or on which other abatement operations
were performed;
(d) Inspect the
surfaces from which the ACM was removed;
(e) Observe and touch the
substrate;
(f) Examine the
permanent features of the regulated area such as walls, conduits, pipes,
ceiling tile grid bars, ducts, etc.;
(g) Examine the floor, walls, and other
surfaces of the regulated area;
(h)
Examine decontamination and waste-load out facilities;
(i) Examine places where the polyethylene
sheeting may have fallen away from the walls or partitions; and
(j) Examine the polyethylene floor coverings
to determine whether visible debris and/or contaminated water may have seeped
through the plastic layers.
If debris is observed, the regulated area must be cleaned and
another visual evaluation conducted. Project documents must reflect the
recleaning activity(ies).
The Air Monitor must ensure that the regulated area is free
of visible debris before conducting air clearance sampling.
The Air Monitor must document in the daily project log the
time that the regulated area was determined to be free of visible debris so
that air clearance sampling could commence.
(2) Air Clearance Sampling. Air clearance
sampling must be performed and documented in accordance with this rule.
Air clearance sampling is subject to the following
requirements:
(a) The containment must
be completely drysuch that there is no visible evidence of water in the
regulated area prior to conducting air clearance sampling.
(b) Immediately prior to conducting air
clearance sampling, the Air Monitor shall implement aggressive sampling by
sweeping the walls, ceiling and floor with the exhaust of a minimum one(1)
horsepower leaf blower. Stationary fans shall then be placed in locations which
will not interfere with air sampling equipment. Fan air shall be directed to
the ceiling. One fan shall be used for each 10,000 square feet of regulated
area floor area and shall run throughout the air clearance sampling event.
Aggressive sampling is not required when a regulated area is in a dirt crawl
space or when dirty or dusty conditions not related to asbestos abatement
activities exist outside the regulated area and will result in rendering filter
media unreadable. Static air clearances samples are required when aggressive
sampling is not appropriate.
(c)
The minimum number of air clearance samples is as follows:
(i) 2 samples for activities that contain
less than 100 linear/square feet, or any combination thereof, total of
ACM;
(ii) 3 samples for activities
that contain more than 100 but less than 1,000 linear/square feet or any
combination thereof total of ACM; and
(iii) 5 samples for activities greater than
1,000 linear/square feet total or any combination thereof of ACM.
(d) PCM air clearance samples must
contain at least 2,452 liters of air and the sampling flow rate must not exceed
16 liters of air per minute.
(e)
Notwithstanding the above, for asbestos abatement projects conducted in
schools, the number and flow rate of the air clearance samples must be in
accordance with the requirements of 40 CFR Part
763, Subpart E.
(f) Air clearance samples shall be analyzed
as follows:
(i) For asbestos abatement
projects in schools that impact more than 160 square feet or 260 linear feet of
asbestos-containing material, air clearance sample analysis must be in
accordance with the requirements of 40 CFR, Part
763, Subpart E, Appendix A
(effective December 14, 1987).
(ii)
For all other projects, air clearance sample analysis must be in accordance
with Appendix A (referenced above), the most current version of NIOSH (National
Institute for Occupational Safety and Health) Methods 7400 or 7402, as
applicable the OSHA Reference Method Asbestos Standard for General Industry,
29 CFR
1910.1001 Appendix A (effective date July 20,
1986) for personal air samples, or otherDepartment-approved analytical
method.
(iii) The total fiber count
of each of the air clearance samples collected inside the regulated area must
be less than or equal to 0.010 f/cc (fibers per cubic centimeter) of air (as
analyzed by phase contrast microscopy), or must be less than or equal to 70
s/mm2 (structures per square millimeter) by TEM
(transmission electron microscopy, or must be below the clearance criteria for
another Department-approved method(s) to release the work area.
(g) Failures of air clearance
sampling (not meeting the clearance criteria of 0.010 f/cc or 70
structures/mm
2) require that the asbestos abatement
contractor:
(i) Wet wipe and HEPA vacuum the
entire regulated area;
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Note: Potentially contaminated make-up air may be
pre-filtered and/or excluded from entering the regulated area prior to
re-cleaning the entire regulated area.
________________________________________________________________________
(ii) Resample and reanalyze either
by NIOSH 7400, or NIOSH 7402 (TEM) or AHERA TEM 40 CFR Part
763 (effective
October 30, 1987); and
________________________________________________________________________
Note: School projects must follow the AHERA sampling and
analysis protocols.
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(iii) Repeat wet wiping, HEPA
vacuuming and re-sampling until the air clearance standards of this section are
met.
(3)
Final Inspection after Removal of Containment. Immediately upon completion of
removal of the containment of the regulated area, an Asbestos Air Monitor or
Asbestos Project Supervisor must visually inspect all surfaces within the
regulated area for visible debris. If there is no containment, then the visual
evaluation of regulated area shall be consistent with section 8.B(1) of this
rule. If visible debris is observed, the regulated area must be cleaned by HEPA
vacuum or wet methods until there is no visible dust or debris present. This
final inspection must be documented in the daily project log. This
documentation must include a statement that the regulated area was clear of
visible debris and the name and signature of the person conducting this final
inspection.