Federal Wage System employees who are authorized to work flexible and compressed work schedules under sections 6122 and 6127 of title 5, United States Code, shall be paid premium pay in accordance with subchapter II of chapter 61 of title 5, United States Code. Subpart D of part 610 of this chapter supplements subchapter II and must be read together with it. [62 FR 28307, May 23, 1997]
Sec. Appendix A to Subpart E of Part 532--Schedule of Environmental Differentials Paid for Exposure to Various Degrees of Hazards, Physical
Hardships, and Working Conditions of an Unusual Nature
This appendix lists the environmental differentials authorized for exposure to various degrees of hazards, physical hardships, and working conditions of an unusual nature.
Part I--Payment for Actual Exposure------------------------------------------------------------------------Differential
rate Category for which payable Effective date
(percent)------------------------------------------------------------------------
100 1. Flying. Participating in flights under Nov. 1, 1970.
one or more types of the following
conditions.
a. Test flights of a new or repaired plane
or modified plane when the repair or
modification may affect the flight
characteristics of the plane;
b. Flights for test performance of plane
under adverse conditions such as in low
altitude or severe weather conditions,
maximum load limits, or overload;
c. Test missions for the collection of
measurement data where two or more
aircraft are involved and flight
procedures require formation flying and/
or rendezvous at various altitudes and
aspect angles;
d. Flights deliberately undertaken in
extreme weather conditions such as flying
into a hurricane to secure weather data;
e. Flights to deliver aircraft which have
been prepared for one-time flight without
being test flown prior to delivery
flight;
f. Flights for pilot proficiency training
in aircraft new to the pilot under
simulated emergency conditions which
parallel conditions encountered in
performing flight tests;
g. Low-level flights in small aircraft
including helicopters at altitude of 150
meters (500 feet) and under in daylight
and 300 meters (1,000 feet) and under at
night when the flights are over
mountainous terrain, or in fixed-wing
aircraft involving maneuvering at the
heights and times specified above, or in
helicopters maneuvering and hovering over
water at altitudes of less than 150
meters (500 feet);
h. Low-level flights in an aircraft flying
at altitudes of 60 meters (200 feet) and
under while conducting wildlife surveys
and law enforcement activities, animal
depredation abatement and making
agricultural applications, and conducting
or facilitating search and rescue
operations; flights in helicopters at low
levels involving line inspection,
maintenance, erection, or salvage
operations;
i. Flights involving launch or recovery
aboard an aircraft carrier;
j. Reduced gravity light testing in an
aircraft flying a parabolic flight path
and providing a testing environment
ranging from weightlessness up through 20
meters per second \2\ (2 gravity)
conditions;
25 2. High work.............................. Nov. 1, 1970.
a. Working on any structure of at least 30
meters (100 feet) above the ground, deck,
floor or roof, or from the bottom of a
tank or pit;
b. Working at a lesser height:
(1) If the footing is unsure or the
structure is unstable; or
(2) If safe scaffolding, enclosed ladders
or other similar protective facilities
are not adequate (for example, working
from a swinging stage, boatswain chair, a
similar support); or
(3) If adverse conditions such as
darkness, steady rain, high wind, icing,
lightning or similar environmental
factors render working at such height(s)
hazardous.
15 3. Floating targets. Servicing equipment Nov. 1, 1970.
on board a target ship or barge in which
the employee is required to board or
leave the target vessel by small boat or
helicopter.
4 4. Dirty work. Performing work which Nov. 1, 1970.
subjects the employee to soil of body or
clothing:
a. Beyond that normally to be expected in
performing the duties of the
classification; and
b. Where the condition is not adequately
alleviated by the mechanical equipment or
protective devices being used, or which
are readily available, or when such
devices are not feasible for use due to
health considerations (excessive
temperature, asthmatic conditions, etc);
or
c. When the use of mechanical equipment,
or protective devices, or protective
clothing results in an unusual degree of
discomfort.
4 5. Cold work. a. Working in cold storage Nov. 1, 1970.
or other climate-controlled areas where
the employee is subjected to temperatures
at or below freezing (0 degrees Celsius
(32 degrees Fahrenheit)).
b. Working in cold storage or other Mar. 13, 1977.
climate-controlled areas where the
employee is subjected to temperatures at
or below freezing (0 degrees Celsius (32
degrees Fahrenheit)) where such exposure
is not practically eliminated by the
mechanical equipment or protective
devices being used.
4 6. Hot work. a. Working in confined spaces Nov. 1, 1970.
wherein the employee is subjected to
temperatures in excess of 43 degrees
Selsius (110 degrees Fahrenheit).
b. Working in confined spaces wherein the Mar. 13, 1977.
employee is subjected to temperatures in
excess of 43 degrees Selsius (110 degrees
Fahrenheit) where such exposure is not
practically eliminated by the mechanical
equipment or protective devices being
used.
4 7. Welding preheated metals. Welding Nov. 1, 1970.
various metals or performing an integral
part of the welding process when the
employee must work in confined spaces in
which large sections of metal have been
preheated to 66 degrees Celsius (150
degrees Fahrenheit) or more, and the
discomfort is not alleviated by
protective devices or other means, or
discomforting protective equipment must
be worn.
4 8. Micro-soldering or wire welding and Nov. 1, 1970.
assembly. Working with binocular-type
microscopes under conditions which
severely restrict the movement of the
employee and impose a strain on the eyes,
in the soldering or wire welding and
assembly of miniature electronic
components..
25 9. Exposure to hazardous weather or July 1, 1972.
terrain. Exposure to dangerous conditions
of terrain, temperature and/or wind
velocity, while working or traveling when
such exposure introduces risk of
significant injury or death to employees;
such as the following:
Examples:
--Working on cliffs, narrow ledges, or
steep mountainous slopes, with or without
mechanical work equipment, where a loss
of footing would result in serious injury
or death.
--Working in areas where there is a danger
of rockfalls or avalanches.
--Traveling in the secondary or unimproved
roads to isolated mountaintop
installations at night, or under adverse
weather conditions (snow, rain, or fog)
which limits visibility to less than 30
meters (100 feet), when there is danger
of rock, mud, or snowslides
--Traveling in the wintertime, either on
foot or by vehicle, over secondary or
unimproved roads or snowtrails, in
sparsely settled or isolated areas to
isolated installations when there is
danger of avalanches, or during
``whiteout'' phenomenon which limits
visibility to less than 3 meters (10
feet)
--Working or traveling in sparsely settled
or isolated areas with exposure to
temperatures and/or wind velocity shown
to be of considerable or very great
danger on the windchill chart (Exhibit 1
of this appendix), and shelter (other
than temporary shelter) or assistance is
not readily available
--Snowplowing or snow and ice removal on
primary, secondary or other class of
roads, when (a) there is danger of
avalanche or (b) there is danger of
missing the road and falling down steep
mountainous slopes, because of lack of
snow-stakes, ``whiteout'' conditions, or
sloping icepack covering the snow
25 10. Unshored work. Working in excavation July 1, 1972.
areas before the installation of proper
shoring or other securing barriers, or in
catastrophe areas, where there is a
possibility of cave-in, building collapse
or falling debris when such exposures
introduce risk of significant injury or
death to employees, such as the
following:
Examples:
--Working adjacent to the walls of an
unshored excavation at depths greater
than 1.8 meters (6 feet) (except when the
full depth of the excavation is in stable
solid rock, hard slag, or hard shale, or
the walls have been graded to the angle
of repose; that is, where the danger of
slides is practically eliminated), when
work is performed at a distance from the
wall which is less than the height of the
wall
--Working within or immediately adjacent
to a building or structure which has been
severely damaged by earthquake, fire,
tornado or similar cause
--Working underground in the construction
and/or inspection of tunnels and shafts
before the necessary lining of the
passageway have been installed
--Duty underground in abandoned mines
where lining of tunnels or shafts is in a
deteriorated condition
15 11. Ground work beneath hovering July 1, 1972.
helicopter. Participating in operation to
attach or detach external load to
helicopter hovering just overhead.
15 12. Hazardous boarding or leaving of July 1, 1972.
surface craft. Boarding or leaving
vessels or transferring equipment to or
from a surface craft under adverse
conditions of foul weather, ice, or night
when sea state is high (0.9 meter (3
feet) and above), and deck conditions and/
or wind velocity in relation to the size
of the craft introduce unusual risks to
employees.
Examples:
--Boarding or leaving vessels at sea.
--Boarding or leaving, or transferring
equipment between small boats or rafts
and steep, rocky, or coral-surrounded
shorelines
--Transferring equipment between a small
boat and a rudimentary dock by improvised
or temporary facility such as an
unfastened plank leading from boat to
dock
--Boarding or leaving, or transferring
equipment from or to ice covered floats,
rafts, or similar structures when there
is danger of capsizing due to the added
weight of the ice
8 13. Cargo handling during lightering July 1, 1972.
operations. Off-lading of cargo and
supplies from surface ships to Landing
Craft-Medium (LCM) boats when swells or
wave action are sufficiently severe as to
cause sudden listing or pitching of the
deck surface or shifting or falling of
equipment, cargo, or supplies which could
subject the employee to falls, crushing,
ejection into the water or injury by
swinging cargo hooks.
15 14. Duty aboard surface craft. Duty aboard July 30, 1972.
a surface craft when the deck conditions
or sea state and wind velocity in
relation to the size of the craft
introduces the risk of significant injury
or death to employees, such as the
following:.
Participating as a member of a water
search and rescue team in adverse weather
conditions when winds are blowing at 56
km/h (35 m.p.h.) (classified as gale
winds) or in water search and rescue
operations at night
--Participating as a member of a weather
projects team when work is performed
under adverse weather conditions, when
winds are blowing at 56 km/h (35 m.p.h.),
and/ or when seas are in excess of 4.3
meters (14 feet), or when working on
outside decks when decks are slick and
icy when swells are in excess of 0.9
meter (3 feet)
--When embarking, disembarking or
traveling in small craft (boat) on Lake
Ponchartrain when wind direction is from
north northeast or northwest, and wind
velocity is over 7.7 meters per second
(15 knots); or when travel on Lake
Ponchartrain is necessary in small craft,
without radar equipment, due to emergency
or unavoidable conditions and the trip is
made in dense fog run procedures
--Participating in deep research vessel
sea duty wherein the team member is
engaged in handling equipment on or over
the side of the vessel when the sea state
is high (6.2-meter-per-second (12-knot)
winds and 0.9 meter (3-foot) waves) and
the work is done on relatively
unprotected deck areas
--Transferring from a ship to another ship
via a chair harness hanging from a
highline between the ships when both
vessels are under way
--Duty performed on floating platforms,
camels, or rafts, using tools equipment
or materials associated with ship repair
or construction activities, where swells
or wave action are sufficiently severe to
cause sudden listing or pitching of the
deck surface or dislodgement of equipment
which could subject the employee to
falls, crushing, or ejection into the
water
50 15. Work at extreme heights. Working at Oct. 22, 1972.
heights 30 meters (100 feet) or more
above the ground, deck, floor or roof, or
from the bottom of a tank or pit on such
open structures as towers, girders,
smokestacks and similar structures:
(1) If the footing is unsure or the
structure is unstable; or
(2) If safe scaffolding, enclosed ladders
or other similar protective facilities
are not adequate (for example, working
from a swinging stage, boatswain chair,
or a similar support); or
(3) If adverse conditions such as
darkness, steady rain, high wind, icing,
lightning, or similar environmental
factors render working at such height(s)
hazardous
6 16. Fibrous Glass Work. Working with or in Feb. 28, 1975.
close proximity to fibrous glass material
which results in exposure of the skin,
eyes or respiratory system to irritating
fibrous glass particles or slivers where
exposure is not practically eliminated by
the mechnical equipment or protective
devices being used.
50 17. High Voltage Electrical Energy. Apr. 11, 1977.
Working on energized electrical lines
rated at 4,160 volts or more which are
suspended from utility poles or towers,
when adverse weather conditions such as
steady rain, high winds, icing,
lightning, or similar environmental
factors make the work unusually
hazardous.
6 18. Welding, Cutting or Burning in Jan. 18, 1978.
Confined Spaces. Welding, cutting, or
burning within a confined space which
necessitates working in a horizontal or
nearly horizontal position, under
conditions requiring egress of at least
4.3 meters (14 feet) over and through
obstructions including: (1) access
openings and baffles having dimensions
which greatly restrict movements, and (2)
irregular inner surfaces of the structure
or structure components.------------------------------------------------------------------------
Part II--Payment on Basis of Hours in Pay Status------------------------------------------------------------------------Differential
rate Category for which payable Effective date
(percent)------------------------------------------------------------------------
50 1. Duty aboard submerged vessel. Duty Nov. 1, 1970.
aboard a submarine or other vessel such
as a deep-research vehicle while
submerged..
8 2. Explosives and incendiary material-- Nov. 1, 1970.
high degree hazard. Working with or in
close proximity to explosives and
incendiary material which involves
potential personal injury such as
permanent or temporary, partial or
complete loss of sight or hearing,
partial or complete loss of any or all
extremities; other partial or total
disabilities of equal severity; and/or
loss of life resulting from work
situations wherein protective devices and/
or safety measures either do not exist or
have been developed but have not
practically eliminated the potential for
such personal injury. Normally, such work
situations would result in extensive
property damage requiring complete
replacement of equipment and rebuilding
of the damaged area; and could result in
personal injury to adjacent employees.
Examples
--Working with, or in close proximity to
operations involved in research, in
testing, manufacturing, inspection,
renovation, maintenance and disposal,
such as:
--Screening, blending, drying, mixing, and
pressing of sensitive explosives and
pyrotechnic compositions such as lead
azide, black powder and photoflash powder
--Manufacture and distribution of raw
nitroglycerine
--Nitration, neutralization,
crystallization, purification, screening
and drying of high explosives
--Manufacture of propellants, high
explosives and incendiary materials
--Melting, cast loading, pellet loading,
drilling, and thread cleaning of high
explosives
--Manufacture of primary or initiating
explosives such as lead azide
--Manufacture of primer or detonator mix
--Loading and assembling high-energy
output flare pellets
--All dry-house activities involving
propellants or explosives
--Demilitarization, modification,
renovation, demolition, and maintenance
operations on sensitive explosives and
incendiary materials
--All operations involving fire fighting
on an artillery range or at an ammunition
manufacturing plant or storage area,
including heavy duty equipment operators,
truck drivers, etc.
--All operations involving regrading and
cleaning of artillery ranges
--At-sea shock and vibration tests. Arming
explosive charges and/or working with, or
in close proximity to, explosive-armed
charges in connection with at-sea shock
and vibration tests of naval vessels,
machinery, equipment and supplies
--Handling or engaging in destruction
operations on an armed (or potentially
armed) warhead
4 3. Explosives and incendiary material--low Nov. 1, 1970.
degree hazard. a. Working with or in
close proximity to explosives and
incendiary material which involves
potential injury such as laceration of
hands, face, or arms of the employee
engaged in the operation and possible
adjacent employees; minor irritation of
the skin; minor burns and the like;
minimal damage to immediate or adjacent
work area or equipment being used.
b. Working with or in close proximity to Mar. 13, 1977.
explosives and incendiary material which
involves potential injury such as
laceration of hands, face, or arms of the
employee engaged in the operation and
possible adjacent employees; minor
irritation of the skin; minor burns and
the like; minimal damage to immediate or
adjacent work area or equipment being
used and wherein protective device and/or
safety measures have not practically
eliminated the potential for such injury
Examples
--All operations involving loading,
unloading, storage and hauling of
explosive and incendiary ordnance
material other than small arms
ammunition. (Distribution of raw
nitroglycerine is covered under high
degree hazard--see category 2 above.)
--Duties such as weighing, scooping,
consolidating and crimping operations
incident to the manufacture of stab,
percussion, and low energy electric
detonators (initiators) utilizing
sensitive primary explosives compositions
where initiation would be kept to a low
order of propagation due to the limited
amounts permitted to be present or
handled during the operations
--Load, assembly and packing of primers,
fuses, propellant charges, lead cups,
boosters, and time-train rings
--Weighing, scooping, loading in bags and
sewing of ignitor charges and propellant
zone charges
--Loading, assembly, and packing of hand-
held signals, smoke signals, and colored
marker signals
--Proof-testing weapons with a known
overload of powder or charges
--Arming/disarming or the installation/
removal of any squib, explosive device,
or component thereof, connected to or
part of a solid propulsion system,
including work situations involving
removal, inspection, test and
installation of aerospace vehicle egress
and jettison systems and other cartridge
actuated devices and rocket assisted
systems or components thereof, when
accidental or inadvertent operation of
the system or a component might occur
8 4. Poisons (toxic chemicals)--high degree Nov. 1, 1970.
hazard. Working with or in close
proximity to poisons (toxic chemicals),
other than tear gas or similar irritants,
which involves potential serious personal
injury such as permanent or temporary,
partial or complete loss of faculties and/
or loss of life including exposure of an
unusual degree to toxic chemicals, dust,
or fumes of equal toxicity generated in
work situations by processes required to
perform work assignments wherein
protective devices and/or safety measures
have been developed but have not
practically eliminated the potential for
such personal injury.
Examples ..............
--Handling and storing toxic chemical
agents including monitoring of areas to
detect presence of vapor or liquid
chemical agents; examining of material
for signs of leakage or deteriorated
material; decontaminating equipment and
work sites; work relating to disposal of
deteriorated material (exposure to
conjunctivitis, pulmonary edema, blood
infection, impairment of the nervous
system, possible death)
--Renovation, maintenance, and
modification of toxic chemicals, guided
missiles, and selected munitions
--Operating various types of chemical
engineering equipment in a restricted
area such as reactors, filters, stripping
units, fractioning columns, blenders,
mixers, pumps, and the like utilized in
the development, manufacturing, and
processing of toxic or experimental
chemical warfare agents
--Demilitarizing and neutralizing toxic
chemical munitions and chemical agents
--Handling or working with toxic chemicals
in restricted areas during production
operations
--Preparing analytical reagents, carrying
out colorimetric and photometric
techniques, injecting laboratory animals
with compounds having toxic,
incapacitating or other effects
--Recording analytical and biological
tests results where subject to above
types of exposure
--Visually examining chemical agents to
determine conditions or detect leaks in
storage containers
--Transferring chemical agents between
containers
--Salvaging and disposing of chemical
agents
4 5. Poisons (toxic chemicals)--low egress Nov. 1, 1970.
hazard. a. Working with or in close
proximity to poisons (toxic chemicals
other than tear gas or similar irritating
substances) in situations for which the
nature of the work does not require the
individual to be in as direct contact
with, or exposure to, the more toxic
agents as in the case with the work
described under high hazard for this
class of hazardous agents.
b. Working with or in close proximity to Mar. 13, 1977.
poisons (toxic chemicals other than tear
gas or similar irritating substances) in
situations for which the nature of the
work does not require the individual to
be in as direct contact with, or exposure
to, the more toxic agents as in the case
with the work described under high hazard
for this class of hazardous agents and
wherein protective devices and/or safety
measures have not practically eliminated
the potential for personal injury
Example ..............
--Handling for shipping, marking,
labeling, hauling and storing loaded
containers of toxic chemical agents that
have been monitored
8 6. Micro-organisms--high degree hazard. Nov. 1, 1970.
Working with or in close proximity to
micro-organisms which involves potential
personal injury such as death, or
temporary, partial, or complete loss of
faculties or ability to work due to
acute, prolonged, or chronic disease.
These are work situations wherein the use
of safety devices and equipment, medical
prophylactic procedures such as vaccines
and antiserims and other safety measures
do not exist or have been developed but
have not practically eliminated the
potential for such personal injury.
Examples
--Direct contact with primary containers
of organisms pathogenic for man such as
culture flasks, culture test tubes,
hypodermic syringes and similar
instruments, and biopsy and autopsy
material. Operating or maintaining
equipment in biological experimentation
or production
--Cultivating virulent organisms on ..............
artificial media, including embryonated
hen's eggs and tissue cultures where
inoculation or harvesting of living
organisms is involved for production of
vaccines, toxides, etc., or for sources
of material for research investigations
such as antigenic analysis and chemical
analysis
4 7. Micro-organisms--low degree hazard. a. Nov. 1, 1970.
Working with or in close proximity to
micro-organisms in situations for which
the nature of the work does not require
the individual to be in direct contact
with primary containers of organisms
pathogenic for man, such as culture
flasks, culture test tubes, hypodermic
syringes and similar instruments, and
biopsy and autopsy material
b. Working with or in close proximity to Mar. 13, 1977.
micro-organisms in situations for which
the nature of the work does not require
the individual to be in direct contact
with primary containers of organisms
pathogenic for man, such as culture
flasks, culture test tubes, hypodermic
syringes and similar instruments, and
biopsy and autopsy material and wherein
the use of safety devices and equipment
and other safety measures have not
practically eliminated the potential for
personal injury
8 8. Pressure chamber and centrifugal July 1, 1972.
stress. Exposure in pressure chamber
which subjects employee to physical
stresses or where there is potential
danger to participants by reason of
equipment failure or reaction to the test
conditions; or exposure which subjects an
employee to a high degree of centrifugal
force which causes an unusual degree of
discomfort
Examples
--Participating as a subject in diving
research tests which seek to establish
limits for safe pressure profiles by
working in a pressure chamber simulating
diving or, as an observer to the test or
as a technician assembling underwater
mock-up components for the test, when the
observer or technician is exposed to high
pressure gas piping systems, gas
cylinders, and pumping devices which are
susceptible to explosive ruptures
--Participating in altitude chamber ..............
studies ranging from 5500 to 45,700
meters (18,000 to 150,000 feet) either as
subject or as observer exposed to the
same conditions as the subject
--Participating as subject in centrifuge ..............
studies involving elevated G forces above
the level of 49 meters per second \2\ (5
G's) whether or not at reduced
atmospheric pressure
--Participating as a subject in a ..............
rotational flight simulator in studies
involving continuous rotation in one axis
through 360[deg] at rotation rates
greater than 15 r.p.m. for periods
exceeding three minutes
8 9. Work in fuel storage tanks. When July 1, 1972.
inspecting, cleaning or repairing fuel
storage tanks where there is no ready
access to an exit, under conditions
requiring a breathing apparatus because
all or part of the oxygen in the
atmosphere has been displaced by toxic
vapors or gas, and failure of the
breathing apparatus would result in
serious injury or death within the time
required to leave the tank
10. Firefighting. Participating or July 1, 1972.
assisting in firefighting operations on
the immediate fire scene and in direct
exposure to the hazards inherent in
containing or extinguishing fires
25 High degree ..............
--Fighting forest and range fires on the ..............
fireline
8 Low degree ..............
--All other firefighting ..............
8 11. Experimental landing/recovery July 1, 1972.
equipment tests
--Participating in tests of experimental ..............
or prototype landing and recovery
equipment where personnel are required to
serve as test subjects in spacecraft
being dropped into the sea or laboratory
tanks
8 12. Land impact or pad abort of space July 1, 1972.
vehicle. Actual participation in dearming
and safing explosive ordnance, toxic
propellant, and high-pressure vessels on
vehicles that have land impacted or on
vehicles on the launch pad that have
reached a point in the countdown where no
remote means are available for returning
the vehicle to a safe condition
4 13. Mass explosives and/or incendiary July 1, 1972.
material. Working within a controlled
danger area in, on, or around wharves,
transfer areas, or temporary holding
areas in a transshipment facility when
explosives are in the process of being
shifted to or from a conveyance
Such an area shall include land and sea
areas within which it has been determined
that personnel are subject to an unusual
degree of exposure or liability to
serious injury or death from potential
explosive effect
A transshipment facility for this purpose ..............
is a port or sea terminal established for
the marshalling or temporary assembly of
explosives prior to shipment where
amounts in excess of 113,400 kilograms
(250,000 pounds) net explosive weight
(NEW) are present on a regular or
recurring basis
4 14. Duty aboard aircraft carrier. Duty July 1, 1972.
aboard an aircraft carrier when exposed
to hazards connected with aircraft launch
and recovery:
Examples ..............
--Participating in carrier suitability
trials aboard aircraft carriers when work
is performed on the flight deck during
launch, recovery and refueling operations
--Operating or monitoring camera equipment Mar. 4, 1974.
adjacent to flight deck in the area of
maximum hazard during landing sequence
while conducting photographic surveys
aboard aircraft carriers during periods
of heavy aircraft operations
8 15. Participating in missile liquid ..............
propulsion or solid propulsion
situations. Participating in research and
development, or preoperational test and
evaluation situation involving missile
liquid or solid propulsion systems where
mechanical, or other equipment
malfunction, or accidental combination of
certain fuels and/or chemicals, or
transient voltage and current buildup on
or within the system when the system is
in a ``go'' condition on the test stand,
or sled, can result in explosion, fire,
premature ignition or firing
Examples ..............
--Test stand or track tests, when adequate
protective devices and/or safety measures
either do not exist or have been
developed but have not practically
eliminated the potential for personal
injury, under any of the following
conditions:
a. Tanks are being pressurized above
normal servicing pressure
b. Assembly, disassembly, or repair of
contaminated plumbing containing
inhibited red fuming nitric acid and
unsymmetrical dimethylhydrazine or other
hypergolic fuels is required
c. Fueling and defeuling ..............
--Hoisting hypergolic liquid fueled ..............
systems into, or out of, a test stand,
where the working area is confined, and
external plumbing is present resulting in
a situation where the plumbing may be
damaged causing a leak
--Tests on foreign missiles where ..............
technical data is questionable or not
available
--Manned test firings of small, close ..............
support missiles for which safety
performance data are not yet available
--Removal of a missile, propulsion system ..............
or component thereof from a test stand,
fixture, or environmental chamber where
there is reason to believe that the item
may be unusually hazardous due to damage
resulting from the test
8 16. Asbestos. Working in an area where Nov. 24, 2003.
airborne concentrations of asbestos
fibers may expose employees to potential
illness or injury. This differential will
be determined by applying occupational
safety and health standards consistent
with the permissible exposure limit
promulgated by the Secretary of Labor
under the Occupational Safety and Health
Act of 1970 as published in title 29,
Code of Federal Regulations, Sec. Sec.
1910.1001 or 1926.1101. Regulatory
changes in Sec. Sec. 1910.1001 or
1926.1101 are hereby incorporated in and
made a part of this category, effective
on the first day of the first pay period
beginning on or after the effective date
of the changes.
8 17. Working at high altitudes. Performing April 2, 1999.
work at a land-based work site more than
3900 meters (12,795 feet) in altitude,
provided the employee is required to
commute to the work site on the same day
from a substantially lower altitude under
circumstances in which the rapid change
in altitude may result in acclimation
problems------------------------------------------------------------------------
Exhibit 1[GRAPHIC] [TIFF OMITTED] TC01SE91.000
windchill chart in non-metric units[GRAPHIC] [TIFF OMITTED] TC01SE91.001 [55 FR 46180, Nov. 1, 1990; 55 FR 52267, Dec. 21, 1990; 55 FR 53608, Dec. 31, 1990, as amended at 58 FR 32274, June 9, 1993; 64 FR 15916, Apr. 2, 1999; 70 FR 21613, Apr. 27, 2005; 71 FR 8922, Feb. 22, 2006]