Hazard pay differential is in addition to any additional pay or allowances payable under other statutes. It shall not be considered part of the employee's rate of basic pay in computing additional pay or allowances payable under other statutes. [56 FR 20345, May 3, 1991] Sec. Appendix A to Subpart I of Part 550--Schedule of Pay Differentials
Authorized for Hazardous Duty Under Subpart I
hazard pay differential, of part 550 pay administration (general)------------------------------------------------------------------------
Rate of
hazard pay
Duty differential Effective date
(percent)------------------------------------------------------------------------
Exposure to Hazardous Weather or
Terrain:
(1) Work in rough and remote terrain. 25 First pay period
When working on cliffs, narrow ledges, beginning after
or near vertical mountainous slopes July 1, 1969.
where a loss of footing would result in
serious injury or death, or when
working in areas where there is danger
of rock falls or avalanches.(2) Traveling under hazardous 25 Do.
(a) When travel over
secondary or unimproved roads to
isolated mountain top installations is
required at night, or under adverse
weather conditions (such as snow, rain,
or fog) which limits visibility to less
than 30 meters (100 feet), when there
is danger of rock, mud, or snow slides.(b) When travel in the wintertime, 25 Do.
either on foot or by means of vehicle,
over secondary or unimproved roads or
snow trails, in sparsely settled or
isolated areas to isolated
installations is required when there is
danger of avalanches, or during
``whiteout'' phenomenon which limits
visibility to less than 3 meters (10
feet).(c) When work or travel in sparsely 25 Do.
settled or isolated areas results in
exposure to temperatures and/or wind
velocity shown to be of considerable
danger, or very great danger, on the
windchill chart (appendix A-1), and
shelter (other than temporary shelter)
or assistance is not readily available.(3) Snow or ice removal operations. When 25 Do.
participating in snowplowing or snow or
ice removal operations, regardless of
whether 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, ``white-out''
conditions, or sloping ice-pack
covering the snow.(4) Water search and rescue operations. 25 Do.
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 conducted
(a) 25 Do.
When embarking, disembarking or
traveling in small craft (boat) on Lake
Pontchartrain when wind direction is
from north, northeast, or northwest,
and wind velocity is over 7.7 meters
per second (15 knots); or.(b) When travelling in small crafts, 25 Do.
where craft is not radar equipped, on
Lake Pontchartrain is necessary due to
emergency or unavoidable conditions and
the trip is made in a dense fog under
fog run procedures.(6) Hazardous boarding or leaving of
vessels. When duties (a), (b), or (c)
are performed under adverse conditions
of foul weather, ice, or night and when
the sea state is high (0.9 meter (3
feet) and above):(a) Boarding or leaving vessels at sea 25 First pay period
or standing offshore during lightering beginning after
or personnel transfer operations. May 7, 1970.(b) Boarding, leaving, or transferring
equipment between small boats or rafts
and steep, rocky, or coral surrounded
shorelines.(c) Transferring equipment between a
small boat and rudimentary dock by
improvised or temporary facility such
as an unfastened plank leading from
boat to dock.(7) Small craft tests under unsafe sea 25 First pay period
conditions. Conducting craft tests to beginning on or
determine the seakeeping after Sept. 28,
characteristics of small craft in a 1972.
seaway when U.S. storm warnings
normally indicate unsafe seas for a
particular size craft.(8) Working on a drifting sea ice floe. 25 First pay period
When the job requires that the work be beginning after
performed out on sea ice, e.g., March 16, 1973.
installing scientific instruments and
making observations for research
purposes.
Exposure to Physiological Hazards:
(1) Pressurechamber subject. (a) 25 Do.
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.(b) Working in pressurized sonar domes. 8 First pay period
Performing checkout of sonar system beginning after
after sonar dome has been pressurized. Feb. 16, 1975.
This may include such duties as
changing transducer elements, setting
of transducer turntables, checking of
cables, piping, valves, circuits,
underwater telephone, and
pressurization plugs.(c) Working in nonpressurized sonar 4 First pay period
domes that are a part of an underwater beginning after
system. Performing certification Feb. 16, 1975.
pretrial inspections, involving such
duties as calibrating, adjusting, and
photographing equipment, in limited
space and with limited egress.(2) Simulated altitude chamber subjects. 25 Do.
Observers. Participating in simulated
altitude 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.
(3) Centrifuge subjects. Participating 25 Do.
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.(4) Rotational flight simulator subject. 25 First pay period
Participating as a subject in a beginning after
Rotational Flight Simulator in studies July 1, 1969.
involving continuous rotation in one
axis through 360[deg] or in a
combination of any axes through
360[deg] at rotation rates greater than
15 r.p.m. for periods exceeding three
minutes.Hot Work--Working in confined spaces 4 First pay period
wherein the employee is subject to beginning after
temperatures in excess of 43 [deg]C Feb. 16, 1975.
(110 [deg]F).(5) Environmental thermal-chamber tests: 25 May 4, 1988.
Subjects and observers exposed to the
hazards and physical hardships of an
environmental chamber-thermal test
which simulates adverse weather or sea
conditions such as the exposure to
subzero temperatures; high heat and
humidiity; and cold water, spray, wind,
and wave action.(6) Working at high altitudes. 8 January 11,
Performing work at a land-based 1999.
worksite more than 3900 meters (12,795
feet) in altitude, provided the
employee is required to commute to the
worksite on the same day from a
substantially lower altitude under
circumstances in which the rapid change
in altitude may result in acclimation
problems..
Exposure to Hazardous Agents, work with
or in close proximity to:
(1) Explosive or incendiary materials. 25 First pay period
Explosive or incendiary materials which beginning after
are unstable and highly sensitive. July 1, 1969.(2) At-sea shock and vibration tests. 25 Do.
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.(3) Toxic chemical materials. Toxic 25 Do.
chemical materials when there is a
possibility of leakage or spillage.(4) Fire retardant materials tests. 25 Do.
Conducting tests on fire retardant
materials when the tests are performed
in ventilation restricted rooms where
the atmosphere is continuously
contaminated by obnoxious odors and
smoke which causes irritation to the
eyes and respiratory tract.(5) Virulent biologicals. Materials of 25 Do.
micro-organic nature which when
introduced into the body are likely to
cause serious disease or fatality and
for which protective devices do not
afford complete protection.(6) Asbestos. Significant risk of 8 June 8, 1993
exposure to airborne concentrations of
asbestos fibers in excess of the
permissible exposure limits (PELS) in
the standard for asbestos provided in
title 29, Code of Federal Regulations,
Sec. Sec. 1910.1001 or 1926.58, when
the risk of exposure is directly
connected with the performance of
assigned duties. Regulatory changes in
Sec. 1910.1001 or 1926.58 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.
Participating in Liquid Missile
Propulsion Tests and Certain Solid
Propulsion Operations:
(1) Tanking and detanking. Tanking or 25 First pay period
detanking operations of a missile or beginning after
the test stand ``run'' bottles with July 1, 1969.
liquid propellants.(2) Hoisting a tanked missile. Hoisting 25 Do.
a tanked missile or a solid propellant
propulsion system into and/or over the
test stand.(3) Pressure tests. Pressure tests on 25 Do.
loaded missiles, missile tanks, or run
bottles during prefire preparations.(4) Test stand tests. Test stand 25 Do.
operations on loaded missiles under
environmental conditions where the high
or low temperatures could cause a
failure of a critical component.(5) Disassembly and breakdown. 25 Do.
Disassembly and breakdown of a
contaminated missile system or test
stand plumbing after test.(6) ``Go'' condition test stand work. 25 Do.
Working on any test stand above the 15-
meter (50-foot) level or any stand work
while the system is in a ``go''
condition.(7) Arming and dearming propulsion 25 Do.
systems. Arming, dearming or the
installation and/or removal of any
squib, explosive device, or a component
thereof connected to, or part of, any
live or potentially expended liquid or
solid propulsion system.(8) Demolition and destruct tests. 25 Do.
Demolition, hazards classification, or
destruct type tests where the specimen
is nonstandard and/or unproven and the
test techniques do not conform to
standard or proven procedures.
Work in Fuel Storage Tanks:
When inspecting, cleaning or repairing 25 Do.
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.
Firefighting:
(1) Forest and range fires. 25 Do.
Participating as a member of a
firefighting crew in fighting forest
and range fires on the fireline.(2) Equipment, installation, or building 25 Do.
fires. Participating as an emergency
member of a firefighting crew in
fighting fires of equipment,
installations, or buildings.(3) In-water under-pier firefighting 25 Do.
operations. Participating in in-water
under-pier firefighting operations
(involving hazards beyond those
normally encountered in firefighting on
land, e.g., strong currents, cold water
temperature, etc.).
Work in Open Trenches:
Work in an open trench 4.6 meters (15 25 Do.
feet) or more deep until proper shoring
has been installed.
Underground Work:
Work underground performed in the 25 Do.
construction of tunnels and shafts, and
the inspection of such underground
construction, until the necessary
lining of the shaft or tunnel has
eliminated the hazard.
Underwater Duty:
(1) Submerged submarine or deep research 25 Do.
vehicle. Duty aboard a submarine or
deep research vehicle when it submerges.(2) Diving. Diving, including SCUBA 25 Do.
(self-contained underwater breathing
apparatus) diving, required in
scientific and engineering pursuits, or
search and rescue operations, when:(a) at a depth of 6 meters (20 feet) or
more below the surface; or,(b) visibility is restricted; or,(c) in rapidly flowing or cold water;
or,(d) vertical access to the surface is
restricted by ice, rock, or other
structure; or,(e) testing or working with hardware
which presents special hazards (such as
work with high voltage equipment or
work with underwater mockup components
in an underwater space simulation
study).
Sea Duty Aboard Deep Research Vessels:
Participating in sea duty wherein the 25 Do.
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 winds (12-knot winds)
and 0.9-meter waves (3-foot waves) and
the work is done on deck in relatively
unprotected areas.
Collection of Aircraft Approach and
Landing Environmental Data:
When operating or monitoring camera 25 First pay period
equipment adjacent to flight deck in beginning after
the area of maximum hazard during July 1, 1969.
landing sequence while conducting
photographic surveys aboard aircraft
carriers during periods of heavy
aircraft operations.
Experimental Landing/Recovery Equipment
Tests:
Participating in tests of experimental 25 Do.
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.
Land Impact or Pad Abort of Space
Vehicle:
Actual participating in dearming and 25 Do.
safing explosive ordinance, 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.
Height Work:
Working on any structure of at least 15 25 Do.
meters (50 feet) above the base level,
ground, deck, floor, roof, etc., under
open conditions, if the structure is
unstable or if scaffolding guards or
other suitable protective facilities
are not used, or if performed under
adverse conditions such as snow, sleet,
ice on walking surfaces, darkness,
lightning, steady rain, or high wind
velocity.
Flying, participating in:
(1) Pilot proficiency training. Flights 25 Do.
for pilot proficiency training in
aircraft new to the pilot under
simulated emergency conditions which
parallel conditions encountered in
performing flight tests.(2) Delivery of new aircraft for flight 25 Do.
testing. Flights to deliver aircraft
which has been prepared for one-time
flight without being test flown prior
to delivery flight.(3) Test flights of new modified, or 25 Do.
repaired aircraft. Test flights of a
new or repaired aircraft or modified
aircraft when the modification may
affect the flight characteristics of
the aircraft.
(4) Reduced gravity--parabolic arc 25 Do.
flights--subjects/observers. Reduced
gravity flight 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).(5) Launch and recovery. Test flights 25 Do.
involving launch and recovery aboard an
aircraft carrier.(6) Limited control flights. Flights 25 Do.
undertaken under unusual and adverse
conditions (such as extreme weather,
maximum load or overload, limited
visibility, extreme turbulence, or low
level flights involving fixed or
tactical patterns) which threaten or
severely limit control of the aircraft.(7) Flight tests of expandable aircraft 25 Do.
tires. Landing to test aircraft tires
designed to deflate upon retraction,
undertaken to appraise the normal
deflate-reinflate cycle and also to
evaluate the capability to make a
satisfactory landing with the tires
deflated.(8) Landing and taking-off in polar 25 Do.
areas. Landing in polar areas on
unprepared snow or ice surfaces and/or
taking-off under the same conditions.
Experimental Parachute Jumps:
Participating as a jumper in field 25 Do.
exercises to test and evaluate new
types of jumping equipment and/or
jumping techniques.
Ground Work Beneath Hovering Helicopter:
Participating in ground operations to 25 Do.
attach external load to helicopter
hovering just overhead.Sling-suspended transfers. When 25 First pay period
performance of duties requires transfer beginning after
from a helicopter to a ship via a sling Oct. 11, 1969.
on the end of a steel cable or from a
ship to another ship via a chair
harness hanging from a highline between
the ships when both vessels are
underway.Carrier suitability trials aboard 25 Do.
aircraft carriers. Participating in
carrier suitability trials aboard
aircraft carriers when work is
performed on the flight deck during
launch, recovery, and refueling
operations.Cargo handling during lightering 25 Do.
operations. Off-loading of cargo and
supplies from surface ships to Landing
Craft--Medium (LCM) boats involving
exposure not only to falling cargo but
such other hazards as shifting cargo
within the LCM, swinging cargo hooks,
and possibility of falling between the
LCM and cargo vessel.Work in unsafe structures: Working 25 First pay period
within or immediately adjacent to a beginning on or
building or structure which has been after Apr. 11,
severely damaged by earthquake, fire, 1976.
tornado, flood, or similar cause, when
the structure has been declared unsafe
by competent technical authority, and
when such work is considered necessary
for the safety of personnel or recovery
of valuable materials or equipment, and
the work is authorized by competent
authority.Tropical Jungle Duty: Work outdoors in
undeveloped jungle regions outside the
continental United States. Work must
involve both of the following:
(1) An unusual degree of physical
hardship caused by high heat,
humidity, or other inclement
conditions; and
(2) An unusual danger of serious
injury or illness due to:
(a) Travel on unimproved roads or
rudimentary trails in rugged
terrain (e.g., walking on narrow
trails in steep mountainous areas,
fording deep, fast-moving rivers,
and crossing deep crevasses via log
or other unsafe means);
(b) Immediate presence of dangerous
wildlife (e.g., venomous snakes,
poisonous insects, and large
carnivores); or
(c) Known exposure to serious 25 June 14, 1989.
disease for which adequate
protection cannot be provided.------------------------------------------------------------------------ (5 U.S.C. 5595; E.O. 11257, 3 CFR 1964-1965 Comp., p. 357) [34 FR 11083, July 1, 1969; 34 FR 12623, Aug. 2, 1969, as amended at 34 FR 15747, Oct. 11, 1969; 35 FR 7172, May 7, 1970; 37 FR 20248, Sept. 28, 1972; 39 FR 7115, Mar. 16, 1973; 40 FR 7437, Feb. 20, 1975; 41 FR 12635, Mar. 26, 1976; 41 FR 14165, Apr. 2, 1976; 53 FR 36557, Sept. 21, 1988; 54 FR 8267, Feb. 28, 1989; 54 FR 25224, June 14, 1989 and 55 FR 1354, Jan. 14, 1990; 56 FR 20345, May 3, 1991; 58 FR 32050, June 8, 1993; 58 FR 32276, June 9, 1993; 64 FR 1502, Jan. 11, 1999]
Sec. Appendix A-1 to Subpart I of Part 550--Windchill Chart[GRAPHIC] [TIFF OMITTED] TC01SE91.002
windchill chart in non-metric units[GRAPHIC] [TIFF OMITTED] TC01SE91.003 [33 FR 12458, Sept. 4, 1968, as amended at 58 FR 32277, June 9, 1993]