APPENDIX A-SCHEDULE OF PAY DIFFERENTIALS AUTHORIZED FOR HAZARDOUS DUTY UNDER SUBPART I-Continued

HAZARD PAY DIFFERENTIAL, OF PART 550 PAY ADMINISTRATION (GENERAL)

(3) Centrifuge subjects. 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.

(4) Rotational flight simulator subject. Participating as a subject in a Rotational Flight Simulator in studies involving continuous rotation in one axis through 360° or in a combination of any axes through 360° at rotation rates greater than 15 r.p.m. for periods exceeding three minutes.

Hot Work-Working in confined spaces wherein the employee is subject to tempera-
tures in excess of 43° C (110° F).

(5) Environmental thermal-chamber tests: Subjects and observers exposed to the haz-
ards and physical hardships of an environmental chamber-thermal test which simu-
lates adverse weather or sea conditions such as the exposure to subzero tempera-
tures; high heat and humidity; and cold water, spray, wind, and wave action.
(6) Working at high altitudes. Performing work at a land-based 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 cir-
cumstances 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. Explosive or incendiary materials which are un-
stable and highly sensitive.

(2) 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.

(3) Toxic chemical materials. Toxic chemical materials when there is a possibility of leakage or spillage.

(4) Fire retardant materials tests. 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 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 exposure to airborne concentrations of asbestos fibers
in excess of the permissible exposure limits (PELS) in the standard for asbestos pro-
vided in title 29, Code of Federal Regulations, §§ 1910.1001 or 1926.58, when the
risk of exposure is directly connected with the performance of assigned duties. Reg-
ulatory changes in § 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 detanking operations of a missile or the test
stand "run" bottles with liquid propellants.

(2) Hoisting a tanked missile. Hoisting a tanked missile or a solid propellant propulsion system into and/or over the test stand.

(3) Pressure tests. Pressure tests on loaded missiles, missile tanks, or run bottles during prefire preparations.

(4) Test stand tests. Test stand 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. Disassembly and breakdown of a contaminated missile system or test stand plumbing after test.

(6) "Go" condition test stand work. Working on any test stand above the 15-meter (50foot) level or any stand work while the system is in a "go" condition.

(7) Arming and dearming propulsion 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. 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.

APPENDIX A-SCHEDULE OF PAY DIFFERENTIALS AUTHORIZED FOR HAZARDOUS DUTY UNDER SUBPART I-Continued

HAZARD PAY DIFFERENTIAL, OF PART 550 PAY ADMINISTRATION (GENERAL)

Duty

Rate of hazard pay differential

Effective date

(percent)

Work in Fuel Storage Tanks:

When 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.

Firefighting:

(1) Forest and range fires. Participating as a member of a firefighting crew in fighting
forest and range fires on the fireline.

(2) Equipment, installation, or building fires. Participating as an emergency member of
a firefighting crew in fighting fires of equipment, installations, or buildings.
(3) In-water under-pier firefighting operations. Participating in in-water under-pier fire-
fighting operations (involving hazards beyond those normally encountered in fire-
fighting on land, e.g., strong currents, cold water temperature, etc.).

Work in Open Trenches:

Work in an open trench 4.6 meters (15 feet) or more deep until proper shoring has been installed.

Underground Work:

Work underground performed in the 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 vehicle. Duty aboard a submarine or deep research vehicle when it submerges.

(2) Diving. Diving, including SCUBA (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 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 equipment 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.

Experimental Landing/Recovery 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.

Land Impact or Pad Abort of Space Vehicle:

Actual participating in dearming and 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 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.

APPENDIX A-SCHEDULE OF PAY DIFFERENTIALS AUTHORIZED FOR HAZARDOUS DUTY UNDER SUBPART Continued

HAZARD PAY DIFFERENTIAL, OF PART 550 PAY ADMINISTRATION (GENERAL)

Duty

Rate of hazard pay differential (percent)

Effective date

Flying, participating in:

(1) Pilot proficiency training. Flights 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 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 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 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 involving launch and recovery aboard an aircraft

carrier.

(6) Limited control flights. Flights undertaken under unusual and adverse conditions
(such as extreme weather, maximum load or overload, limited visibility, extreme tur-
bulence, or low level flights involving fixed or tactical patterns) which threaten or se-
verely limit control of the aircraft.

(7) Flight tests of expandable aircraft tires. Landing to test aircraft tires designed to de-
flate 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 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 exercises to test and evaluate new types of jumping equipment and/or jumping techniques.

Ground Work Beneath Hovering Helicopter.

Participating in ground operations to attach external load to helicopter hovering just overhead.

Sling-suspended transfers. When performance of duties requires transfer from a helicopter to a ship via a sling 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 aircraft carriers. Participating in carrier suitability trials
aboard aircraft carriers when work is performed on the flight deck during launch, re-
covery, and refueling operations.

Cargo handling during lightering operations. Off-loading of cargo and supplies from sur-
face ships to Landing Craft-Medium (LCM) boats involving exposure not only to fall-
ing 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 within or immediately adjacent to a building or
structure which has been severely damaged by earthquake, fire, 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 com-
petent authority.

APPENDIX A-SCHEDULE OF PAY DIFFERENTIALS AUTHORIZED FOR HAZARDOUS DUTY UNDER SUBPART I-Continued

HAZARD PAY DIFFERENTIAL, OF PART 550 PAY ADMINISTRATION (GENERAL)

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 disease for which adequate protection cannot be provided.

(percent)

25 June 14, 1989.

(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]