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2.02

Damaged or deteriorated materials may not be used and must be promptly removed from
the premises. Material which becomes contaminated with asbestos-containing material
shall be packaged and legally disposed of in an approved, secure landfill.

All materials, tools, and equipment must comply, at a minimum, with this Specification,
and relevant federal, state, and local codes.

MATERIALS, TOOLS, AND EQUIPMENT

Negative Air Machines: Supply the required number of asbestos air filtration units to
the site in accordance with these Specifications. Each unit shall include the following:

1.

Cabinet: Constructed of steel or other durable materials able to withstand damage
from rough handling and transportation. The width of the cabinet should be less
than 30 inches to fit through standard-size doorways. Cabinet shall be factory
sealed to prevent asbestos-containing dust from being released during use,
transport, or maintenance. Access to and replacement of all air filters shall be
from intake end. Unit shall be mounted on casters or wheels.

Fans: Rate capacity of fan according to useable air-moving capacity under actual
operating conditions. Use centrifugal-type fan.

HEPA Filters: The final filter shall be the HEPA type. The filter media (folded
into closely pleated panels) must be completely sealed on all edges with a
structurally rigid frame.

a. A continuous rubber gasket shall be located between the filter and the
filter housing to form a tight seal.

b. Each filter shall be individually tested and certified by the manufacturer to
have an efficiency of not less than 99.97 percent when challenged with 0.3
mm dioctylphthalate (DOP) particles. Testing shall be in accordance with
Military Standard Number 282 and Army Instructions Manual 136-300-
175A. Each filter shall bear a UL586 label to indicate ability to perform
under specified conditions.

C. Each filter shall be marked with: the name of the manufacturer, serial
number, air flow rating, efficiency and resistance, and the direction of test
air flow.

Prefilters, which protect the final filter by removing the larger particles, are
required to prolong the operating life of the HEPA filter. Two stages of pre-
filtration are required. The first-stage prefilter shall be a low-efficiency type (e.g.,
for particles 10 Estaver(drlantemnediateyetttad shall

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have efficiency effective for particles down to 5 LIm. Prefilte:
filters shall be installed either on or 1n the intake grid of the unit and held in place
with special housings or clamps.

5. Instrumentation: Each unit shall be equipped with a magnahelic gauge or
manometer to measure the pressure drop across filters and indicate when filters
have become loaded and need to be changed. A table indicating the useable air-
handling capacity for various static pressure readings on the magnahelic gauge
shall be affixed near the gauge for reference or the magnahelic reading indicating
at what point the filters should be changed, noting Cubic Feet per Minute (CFM)
air delivery at the point.

6. Provide units equipped with an elapsed time meter to show the total accumulated
hours of operation.

7. Safety and Warning Devices: The unit shall have an electrical (or mechanical)
lockout to prevent fan from operating without a HEPA filter or with a filter
installed backwards. Units shall be equipped with automatic shutdown system to
stop fan in the event of a major rupture in the HEPA filter or blocked air
discharge. Warning lights and audible alarms are required to indicate normal
operation, excessive pressure drop across the filters (e.g., filter overloading), and
too low of a pressure drop (e.g., major rupture in HEPA filter or obstructed
discharge).

8. Flexible hoses (ducts) of sufficient length shall be provided by the Contractor to
allow the units to discharge outside of buildings.

9. Electrical components shall be approved by the National Electrical Manufacturers
Association (NEMA) and Underwriter's Laboratories (UL). Each unit shall be
equipped with overload protection sized for the equipment. The motor, fan, fan
housing, and cabinet shall be grounded.

B. Respirator Protection Equipment

1. Air Purifying Respirators: Provide, at aminimum, HEPA type filters labeled with
NIOSH and MSHA Certification for "Radionuclides, Radon Daughters, Dust,
Fumes, Mists including Asbestos-Containing Dusts and Mists" and color coded in
accordance with ANSI Z228.2 (1980). In addition, a chemical cartridge section
may be added, if required, for solvents, etc., in use. In this case, provide
cartridges that have each section of the combination canister labeled with the
appropriate color code and NIOSH/MSHA Certification.

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Supplied Air Respirator Systems:

a.

Provide equipment capable of producing air of the quality and volume
required by the reference standards applied to the job site conditions and
crew size. Comply with provisions of this Specification, if more stringent
than the governing standard.

Face Piece and Hose: Provide full face piece and hose by same
manufacturer that has been certified by NIOSH/MSHA as an approved
Type "C" respirator assembly with a full facepiece operating in pressure
demand mode with an auxiliary positive pressure self-contained breathing
apparatus.

Backup air supply: Provide a reservoir of compressed air (Grade "D"
breathing air or better) located outside the Work Area which will
automatically maintain a continuous uninterruptable source of air
automatically available to each connected face piece and hose assembly in
the event of compressor shut-down, contamination of air delivered by
compressor, power loss or other failure. Provide sufficient capacity in the
back-up air supply to allow a minimum escape time of one-half hour times
the number of connections available to the Work Area. Air requirement at
each connection 1s the air requirement of the respirators in use plus the air
requirement of an average sized adult male engaged in moderately
strenuous activity.

Warning device: Provide a warning device that will operate independently
of the building's power supply. Locate so that alarm is clearly audible
above the noise level produced by equipment and work procedures in use,
in all parts of the Work Area and to the compressor. Connect alarm to
warn of:

° Compressor shut down or other fault requiring use of backup air
supply.
° Carbon Monoxide (CO) levels in excess of 5 PPM.

Carbon Monoxide (CO) Monitor: Continuously monitor and record on a
strip chart recorder Carbon Monoxide (CO) levels. Place monitors in the
air lines between compressor and back-up air supply and between backup
air supply and workers. Connect monitors so that they also sound at the
levels specified under "Warning Devices".

Compressor Shut Down: Interconnect monitors, alarms and compressor

so that compressor is automatically shut down and the alarms sounded if
any of the following occur:

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° Carbon monoxide (CO) concentrations exceed 5 PPM in the air
line between the filter bank and backup air supply,
. Compressor temperature exceeds normal operating range.

g. Compressor Motor: Provide a compressor driven by an electric motor.
Ensure that electrical supply available for the Work Area is adequate to
energize motor.

h. Compressor Location: Locate the compressor in a location that will not
impede access to the work area, and that will not cause a nuisance by
virtue of noise or fumes to adjacent areas.

1. Air Intake: Locate air intake remotely from any source of automobile
exhaust or any exhaust from motors or buildings.

J. After Cooler: Provide an after cooler at entry to filter system which is
capable of reducing temperatures to outside ambient air temperatures.

k. Self Contained Breathing Apparatus (SCBA): Configure system to permit
the recharging of % hour 2260 PSI SCBA cylinders.

I. Air Quality For Supplied Air Respiratory Systems: Provide air used for
breathing in Type "C" supplied air respiratory systems that meets or
exceeds standards set for C.G.A. type 1 (gaseous Air) Grade F.

C. Wetting Agents: For wetting prior to disturbance of Asbestos-Containing Materials and
during removal procedures, use either Amended Water or a removal encapsulant. The
material must be odorless, non-flammable, non-toxic, non-irritating, and non-
carcinogenic. It shall be applied as a mist using alow pressure sprayer recommended by
the manufacturer.

1. Amended Water: Provide water to which a surfactant has been added. Use a
mixture of surfactant and water which results in wetting of the Asbestos-
Containing Material and retardation of fiber release during disturbance of the
material equal to or greater than that provided by the use of one ounce of a
surfactant consisting of 50% polyoxythylene ester and 50% polyoxythylene ether
mixed with five gallons of water or as specified by the manufacturer.

2. Removal Encapsulant: Provide a penetrating type encapsulant designed
specifically for removal of asbestos containing material. Use a material which
results in wetting of the asbestos-containing material and retardation of fiber
release during disturbance of the material equal to or greater than that provided by
water amended with one ounce of a surfactant consisting of 50% polyoxyethylene
ester and 50% polyoxyethylene ether mixed with five gallons of water or as
specified by the manufacturer.

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Glove Bags: Commercially made bags of 6-mil polyethylene shall be used.
Brands/designs are subject to the Engineer's review and acceptance.

Polyethylene Sheet: Provide flame resistant polyethylene film that conforms to
requirements set forth by the National Fire Protection Association Standard 701, Small
Scale Fire Test for Flame-resistant Textiles and Films. Provide largest size possible to
minimize seams, 6.0 mils thick as required, frosted or black, as indicated.

Waste Containers: The Contractor shall provide 6-mil thick leak-tight polyethylene bags
labeled in accordance with EPA's NESHAPS, OSHA, and DOT regulations.

If the waste material contains sharp edges or may otherwise puncture polyethylene bags,
provide properly labeled drums or other closed, puncture resistant containers for storage,
transportation, and disposal.

Fans and Leaf Blower: The Contractor shall provide leaf blower and one 20" diameter
fan for each 10,000 cubic feet of Work Area volume to be used for aggressive sampling
techniques for clearance air testing by the Engineer.

Filters: Provide cascaded filter units on drain lines from showers or any other water
source carrying asbestos contaminated water from the Work Area or Regulated Area.
Provide units with disposable filter elements as indicated below. Connect so that
discharged water passes through the primary filter and the output of the primary filter
passes through the secondary filter.

Primary Filter - Shall pass particles 20 microns and smaller
Secondary Filter - Shall pass particles 5 microns and smaller.

Hand Power Tools - Shall be equipped with HEPA-filtered local exhaust ventilation if
used to drill, cut into, or otherwise disturb ACM.

Pressure-Differential Recorder - Provide air pressure sensing devices equipped with
recorders for continuous monitoring of Work Area pressure differential. Provide
sufficient quantities of chart paper and maintain devices until completion of Work.
Two Way Radios - Provide General Superintendent and all Work Area Supervisors and
Foremen with compatible two-way radios. Provide Engineer with compatible two-way
radio.

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PART 3 EXECUTION

3.01

PRE-ASBESTOS ABATEMENT PREPARATIONS

The Contractor shall excavate the soils around the Asbestos-Containing Materials to the
extent possible without disturbing or impacting the Asbestos-Containing Materials.

Prior to completion of excavation work, the Contractor shall set-up the Work Area as
follows:

1. Demarcate, at ground level, the boundaries of the Work Area and post required
warning signs meeting the requirements of OSHA 29 CFR 1926.1101.

2. Construct containment structures, as required by governing regulations, to isolate
the Work. Containment structures will not be required for Class II Asbestos
Work that can be performed without cutting, sawing, crushing, or otherwise
abrading the asbestos material where permitted by regulatory agencies.

The Contractor shall prepare each Work Area as described 1n this Section. Preparation
Work shall be performed according to the following general sequence of steps and
procedures to insure that proper containment and protection systems are installed prior
to any Work which could disturb asbestos-containing materials and generate airborne
asbestos fibers.

Erect Decontamination Facilities and install HEPA Exhaust Fans.

Isolate all electrical systems, and provide temporary power and lighting as required for
Work Areas and Regulated Areas.

Clean and remove any non-fixed items (not removed by the Department) to storage
areas. Items that cannot be Certified Clean shall be disposed of as asbestos waste.

Carefully clean all surfaces in the Work Area or Regulated Area which may be
contaminated with any dust or debris.

Cover any openings; erect any required barriers, coverings, tunnels, or access platforms;
post access restriction signs; seal all openings into the Work Area; install any temporary
access openings; and poly all walls.

Obtain Engineer's acceptance of all preparation work as described in this Subsections

and Subsections 3.02, 3.03 and 3.04 before starting removal of Asbestos-Containing
Materials (as described in Subsections 3.05, 3.06, and 3.07 respectively).

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3.02

Where required, the Contractor shall install a temporary airtight tunnel and/or barrier
wall (prior to the start of any asbestos abatement Work) to maintain access through a
Work Area or Regulated Area, or to safely isolate the Work Area or Regulated Area.

ISOLATION OF ELECTRICAL SYSTEMS AND INSTALLATION OF
TEMPORARY POWER AND LIGHTING

The scope of the required electrical isolation and protection work includes isolation and
protection of electrical equipment which 1s 1n areas where asbestos removal work must
be performed, and could therefore possibly become a hazard through contact or short
circuiting in a wet environment. The Work shall also include providing labor to install,
monitor, inspect, and service temporary power circuits, lighting, and equipment as
required by local codes and regulations.

The electrical isolation Work also includes the shutdown of lighting circuits in the
affected areas and installation of temporary lighting and power with ground fault
protection circuitry in accordance with applicable codes. Unless otherwise accepted by
the Engineer, any electrical or communication circuits that pass through a Work Area
must be re-routed through non-work areas to maintain service.

Temporary light shall be provided by the Contractor 1n all Work Areas and Regulated
Areas where asbestos removal is performed. (See Subsection 1.12 - Temporary
Facilities).

All light fixtures remaining in the Work Area shall be de-energized, thoroughly cleaned,
and then wrapped with protective, 6-mil plastic. They shall not be energized while in a
covered condition.

Light systems not demolished or disconnected shall be re-energized and tested when
removal work is finished and fixtures are unwrapped.

Temporary lighting and power systems shall comply with all OSHA, state, and local
regulations.

The Contractor 1s responsible for providing a safe condition, verifying existing electrical
conditions and determining isolation requirements.

The Contractor shall be required to furnish, without additional expense, all
transportation, labor, and materials necessary to maintain the electrical systems for a safe
operation, and to maintain service in areas abutting Work Areas in compliance with
codes.

When switching circuits at panels, the Contractor's electrician shall review the existing

directory. The Contractor shall not shutdown any circuits without the advanced
notification and acknowledgment of the Engineer.

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J. All Contractor costs associated with the isolation of electrical systems and installations
of temporary power and lighting must be included in his prices.

K. Where shutdown of electrical equipment is not possible and use of a wet removal
process 1s unsafe, the Contractor shall obtain the approval of EPA and other applicable
agencies to use a "dry" removal procedure.

L. The Contractor shall, at no additional cost, install and provide AC power for the
Engineer to collect air samples, as required.

3.03 CLEANING OF DAMAGED MATERIAL AND ASBESTOS-CONTAMINATED
SURFACES

A. This Subsection pertains to the cleaning of surfaces which are potentially contaminated

with Asbestos dust or debris discovered in the performance of the specified Work. Such
cleaning shall be required to prevent this potentially asbestos-containing dust or debris
from becoming airborne and posing an exposure risk to site occupants or interfering in
air monitoring activities. Cleaning actions shall be performed by the Contractor as
preliminary exposure control measures prior to performing other abatement actions
which are required. Cleaning shall consist of HEPA-vacuuming followed by wet wiping
(if necessary) of surfaces 1n a manner which prevents dust generation and effectively
eliminates all visible and microscopically detectable debris, dust, film and grime. The
Engineer shall conduct final inspection of Precleaning Work prior to the Contractor
performing any other specified actions.

Each HEPA-vacuum cleaner shall be separately equipped with an airtight, securely
attached hose of proper length, a collection wand, a brush, and other special attachments
appropriate to the required cleaning tasks. The equipment shall be properly operated at
all times and shall contain no air leaks. The Engineer may inspect all vacuuming
equipment prior to its use, and may request verification of the efficiency of the
equipment's filtration.

Cleaning Procedure:

1. Remove large pieces of debris by hand, and then HEPA vacuum all specified
surfaces using HEPA-filtered equipment and a collection attachment which
minimizes dust generation. Surfaces shall be cleaned by working outward from
the point of access so that workers do not walk on or disrupt uncleaned surfaces.

2. Wet the surface of any material that could produce airborne fibers by using an
airless sprayer and amended water. Continuously mist the area to minimize

airborne fiber concentration.

3. Collect, package, label, and dispose of vacuumed material as asbestos waste.

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4. Thoroughly clean all surfaces to remove any remaining dirt or grime, being
careful not to wet or damage any electrical equipment.

5. Allow surfaces to completely dry, then inspect them for any visible remaining dirt
or fibrous material.

6. HEPA-vacuum any remaining dirt, residue or fibers using an efficient collection
attachment.
7. Encapsulate all areas where damage has occurred or ACM is otherwise exposed,

including the general work area.

8. Collect and pump all wastewater through a 5.0 micron filter. Dispose of filtered
material (and the filter), as required, as asbestos waste.

9. Request Engineer to conduct final inspection of cleaning work prior to performing
any other specified actions.

D. Decontamination Facilities

1. For Class I Asbestos Work involving less than 25 linear feet of Thermal System
Insulation (TSI) or less than 10 square feet of surfacing ACM and Presumed
Asbestos-Containing Material (PACM), and for Class II Asbestos Work
operations where exposures exceed a PEL, or where there is no Negative Initial
Exposure Assessment produced before the project, the Contractor shall provide
the following:

a. An Equipment Room or area adjacent to the Regulated Area for the
decontamination of workers and their equipment which shall consist of an
area covered by an impermeable drop cloth on the floor or horizontal
working surface.

b. The Equipment Room or area must be of sufficient size as to
accommodate cleaning of equipment and removing personal protective

equipment without spreading contamination beyond the area.

C. A Clean Room or area adjacent to the Equipment Room for the suiting up
of workers and visitors and for the storage of clothing and personal items.

d. An Air Lock between the Clean Room and the Equipment Room or area.
2. For Class I Asbestos Work involving more than 25 linear feet or 10 square feet of

TSI or surfacing ACM and PACM, the Contractor shall establish a
Decontamination Facility that 1s adjacent and connected to the Work Area for the

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decontamination of workers. The Decontamination Facility or area shall consist
of an Equipment Room, Shower Room and Clean Room in series. The Contractor
shall ensure that workers enter and exit the Work Area through the
Decontamination Facility. The Contractor shall provide the following:

a.

Equipment Room (Dirty Room): Provide Equipment Room with Air
Locks to the Work Area and Shower Room, large enough for all workers
to remove and dispose of contaminated protective clothing, and for storage
of contaminated Contractor equipment.

Shower Room: Provide acompletely watertight operational shower to be
used for transit by cleanly dressed workers heading for the Work Area
from the Clean Room, or for showering by workers headed out of the
Work Area after undressing in the Equipment Room. The Shower Room
facilities and size shall be adequate to allow decontamination and
thorough washing of all the workers and visitors within the 30 minute
escape time allowed under air compressor failure (if Type C Supplied Air
Respirators are used). Provide 20 micron and 5 micron waste water filters
in line to drain. Change filters daily or more often if necessary. Locate
filters inside shower unit so that water lost during filter changes is caught
by shower pan.

Clean Room (Changing Room): Provide a room that is physically and
visually separated from the rest of the Work Area for the purpose of
changing into protective clothing. Locate so that access to Work Area
from Clean Room ts through the Shower Room. Do not allow Asbestos
contaminated items to enter this room.

Maintain floor of changing room dry and clean at all times. Do not allow
overflow water from shower to wet floor in changing room.

Decontamination Facilities shall be located in areas acceptable to the Engineer.
Construction shall have load-bearing capabilities if required to support workers
overhead.

The Contractor shall post or have available the following items in each Clean
Room of the worker Decontamination Facility.

a.

A copy of the U.S. Environmental Protection Agency Regulations for
Asbestos, 40 CFR 61 Subparts A and M; and a copy of OSHA Asbestos
Regulations, 29 CFR 1926.1101;

A copy of all applicable State of New Hampshire Regulations for
Asbestos.

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