Document text
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I
Copy 3
FM 17-59
WAR DEPARTMENT
ARMORED FORCE FIELD
MANUAL
DECONTAMINATION OF ARMORED
FORCE VEfflCLES
October 12, 1942
. , , n\
REGRADEO BY
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BY.
HopgvofDOD WR.SmiR -
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ONLY"''"'
NOT TO BE TAKEN FROM LIBRARY
FM 17-59
P 1
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF ARMORED
FOKCE VEHICLES
Changes 1 WAR DEPARTMENT,
No. 1 I Washington, March 4, 1943.
FM 17-59, October 12, 1942, is changed as follows :
■ 12. First Echexon. — a. Light tanks.
*****
(3) Alternate methods. — (a) * * *
i. Interior should be * * * Are or explosion. Until
gasoline fumes in the interior are removed, flames
must be avoided both inside and outside the tank,
and weapons should not be fired except in case of
emergency. The interior of the tank is never
burned off.
6. Medium tatiks.
(4) Alternate methodfi. — (a) * * *
1. Interior should be * * * Are or explosion. Until
gasoline fumes in the interior are removed, flames
must be avoided both inside and outside the tank,
and weapons should not be fired except in case of
, emergency. The interior of the tank is never
burned off.
* * * *
e. (Added.) Special precautions. — (1) During training, de-
contamination of vehicles by burning ofif will be in the presence
of a commissioned officer only. All members of the crew will
dismount and vehicular flre-fighting equipment will be held ready
outside the vehicle.
(2) Decontamination by burning off is forbidden during train-
ing except when all the provisions of this manna) are carefully
and fully complied with.
[A. Q. 062.11 (2-4-43).] (C 1. iMar. 4, 15)43.)
•.IISCOT — 4S
AKMOKED FORCE FIELD M ANUAL
Section IV (Added)
INDIVIDUAL PROTECTIVE CO^TSR
■ 16. Purpose. — a. The cover, protective, individual. Issued two
per person, is carried in the gas mask carrier.
6. The cover is intended to protect against liquid vesicants
sprayed from the air. It should prevent the contamination of
clothing and reduce the requirements for decontamination.
■ 17. TJsB OF Cover. — a. The cover is large enough to permit
the performance of most combat duties. In driving a vehicle,
the cover may be placed over the steering wheel but should not
be tucked in around the seat or body as this will cut off the air
supply and quickly foul the air inclosed.
6. For drill purposes, extra covers should be used as they
will become damaged in use and will become difficult to refold.
c. Before going into a theater of operations where vesicants
are likely to be used the following should be done :
(1) Pull the rip tape and remove the end of the envelope of
the cover intended for Immediate use to permit it to be Instantly
withdrawn.
(2) Place the spare cover between the canister and canister
straps.
(3) Place the cover intended for immediate use in the front
part of the carrier.
4. Figures 55 to 58, inclusive, show how to don the cover.
Figures 20 to 22, inclusive, show method of disposing of covers
after a gas attack.
3
DECOKTAMINAXION OF AKMOUEU FORCE VEHICLES
AKMOKED rOBCE FlULD MANUAL
DECONTAMINATIOIf OF ARMORED FORCE VEHICLES
AKMORED FORCE FIELD MANUAL
PULL COVER DOWN, PROTECTING BODY
AND CLOTHING FROM AIRPLANE SPRAY.
FlODRB 58. — Donning the protective cover.
[A. G. 062.11 (2-4-43).] (C 1, Mar. 4, 1943.)
7
DECONTASIIlirATXON OF ARMORED FORCE VEHICLES
By oedeb op the Skcbeiaky of War :
G. C. MAESHAI,L,
Chief of Staff.
Officiai, :
J. A. ULIO,
Major General,
The Adjutant General.
S
U. S. GOVERNMENT PRINTING OFFICE: 1943
FM 17-59
ARMORED FORCE FIELD
MANUAL
DECONTAMINATION OF ARMORED
FORCE VEHICLES
UNITED STATES
GOVERNMENT PRINTING OFFICE
WASHINGTON : 1942
WAR DEPARTMENT,
Washington, October 12, 1942.
FM 17-59, Armored Force Field Manual, Decontamina-
tion of Armored Force Vehicles, is published for the inform
mation and guidance of all concerned.
[A.G. 062.11 (9-15-42).]
By order of the Secretary of War:
G. C. MARSHALL,
Chief of Staff.
Official :
J. A. ULIO,
Major General,
The Adjutant General.
Distribution:
D (10) ; IR 2, 3, 5-11, 18 (5) ; Bn and H 17 (5) ; IBr
2, 3, 5-11, 18 (5) ; C 17 (20) ; IC 2, 3, 5-11, 18 (5)
(For explanation of symbols see FM 21-6. )
TABLE OF CONTENTS
Paragraphs Page
Section I. General 1-7 1
II. Materials and equipment 8^10 5
■ III. Procedure 11-15 14
Appendix I. Questions and answers 67
II. Additional decontaminants 75
Index 79
III
FM 17-59
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF AEMORED FORCE VEHICLES
Section I
GENERAL
■ 1. General. — Gas attacks from the air and large-scale gas
barriers are a serious threat to ground troops. The protec-
tion offered by armored vehicles and the ability of armored
units to carry antigas equipment in vehicles which are imme-
diately available to the personnel make it possible for the
Armored Force to carry out its normal combat missions with
minimum loss in efficiency and effectiveness. In order to
attain this goal preventive measures must be taken before
entry into operations and thorough training conducted in
the technique prescribed in this manual.
■ 2. Purpose. — Time, place, and degree of decontamination
to be carried out in a tactical situation is a command decision.
The purpose of this manual is to prescribe preventive meas-
ures to be taken prior to active operations and the steps
necessary to decontaminate vehicles under combat conditions.
The procedures prescribed will neutralize the effects of per-
sistent gas with the least interference with the mission of
the unit and will prevent excessive casualties.
■ 3. Scope. — This manual describes the equipment and ma-
terials used in decontamination, and prescribes the measures
to be taken before entry into active operations. It includes
the procedure of decontamination In all echelons.
■ 4. Characteristics of Persistent Chemical Agents. — a.
Persistent chemicals are heavy, oily liquids which adhere to
the surfaces of vehicles for varying lengths of time. They are
readily absorbed by oil paints, by untreated fabrics and
leather, and by grease, but are only moderately absorbed by
lacquers used on vehicles of the Armored Force. Rubber
absorbs them slowly. If left on the vehicles, weapons, and
equipment the liquids will burn the skin of the personnel who
1
4-5
ARMORED FORCE FIELD MANUAL
come In contact with them and will give off vapors which will
burn the eyes and lungs if the gas mask is not worn.
b. The gas mask offers complete protection for the eyes
and lungs, but vapors will cause blisters when the skin is
exposed to them for long periods. Protective clothing offers
protection against vapor and small droplets of liquid, al-
though large drops may penetrate it and burn the skin.
c. The effect of these chemicals may be neutralized by^
the action of decontaminating agents; they can be removed
by heat, or dissolved in gasoline, Diesel fuel, kerosene, or
engine oil and subsequently wiped off, and on bright or
lacquered metal surfaces they can be removed by scouring
with mud. These chemicals do not dissolve in water, but
when nothing better is available, water, especially hot, soapy
water, may be used to wash them off.
■ 5. Types of Contamination. — Contamination of vehicles
Will occur in one of four ways:
a. From passing over contaminated terrain covered by
undergrowth, high grass, mud or dust. — This will result in
contaminating the under carriage of the vehicles by direct
contact with the chemical in liquid form on the vegetation
or by picking up the chemical in the mud or dust. Usually
such contamination will not present a serious problem to
the continued operation of the vehicle if the chemical Is
removed from the front of the vehicle so that the vapors
are not carried into the crew compartment.
b. From airplane spray. — This type of contamination is
especially serious in the case of open vehicles as the -per-
sonnel and their equipment will probably be contaminated
at the same time. The chemical will appear as small, dark-
colored droplets varying in size from specks to large rain
drops. The tank, if buttoned up, will largely protect the
crew from liquid chemicals; however, the chemical must be
removed from surfaces over which air passes on its way into
the crew compartment, otherwise a dangerous vapor con-
centration of gas may be present in the air that passes
through the crew compartment.
e. From, the splash of a direct hit or near miss by gas shells
and gas bombs. — Contamination of this type will be very
heavy and may drive the liquid chemical through the crevices
into a closed tank or into the body of an open vehicle. In
2
DECONTAMINATION OF VEHICLES
5-6
such instances the vehicle is generally smeared at least on
one side with liquid chemical and should be decontaminated
at the earliest possible opportunity consistent with the
tactical situation.
d. From standing in an atmosphere with a heavy concen-
tration of chemical in vapor fcyrm. — Such contamination is
generally light and consists of the absorption of the vapor by
(grease and oil on the vehicle. It may also be absorbed by
leather, rubber, and fabric equipment which may be in the
vehicle if the equipment has not been previously treated.
■ 6. Preventive Measuhes. — a. In order for personnel to be
able to protect themselves and to be in a constant State of
readiness to perform first echelon decontamination without
loss of valuable time, impregnated clothing. Including cotton
gloves, must be worn when in active operations, and cello-
phane covers must be carried, one of which has been re-
moved from the container and is ready to be adjusted.
b. Persistent liquid chemicals can be removed from metal,
lacquered metal surfaces, and gas-impervious fabric in a
short time. However, those chemicals in both liquid and
vapor form will enter into ordinary fabric and leather equip-
ment, rendering it unsafe to handle. The time required to
decontaminate such equipment is so great that it may seri-
ously interfere with time and space factors in active opera-
tions, but if these decontaminating measures are not taken,
casualties will be excessive and the vapors will force crews
into gas masks for extended periods with attendant lowering
of efQciency. On vehicles not equipped with gas-impervious
fabric, the ordinary fabric and leather equipment can be
treated prior to contact with gas to prevent its contamination
so that undue delays or excessive casualties will be eliminated.
It is the responsibility of Armored Force commanders to
see that these measures are taken prior to entry into active
operations. The following will be accomplished either when
the unit is alerted at its home station for movement to a
theater of operations, in the staging area, or immediately
upon arrival in the theater of operations, according to where
the materials are made available and the instructions issued
in each case.
(1) Combat clothing, if not impregnated before it is Is-
3
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ARMORED FORCE FIELD MANUAL
sued, Will be impregnated by field methods (see TC No. 4,
W. D., 1942, and PM 21-40) .
(2) AH ordinary fabric equipment normally carried on
vehicles, such as top covers, seat covers, weapon covers, etc.,
will be impregnated by the same method except when made
from gas-impervious materials.
(3) Large pieces of fabric and fabric equipment which
is padded or cannot be removed from vehicles, such as can-
vas vehicle top covers, seat and back rests, etc., will be
impregnated by applying the heated impregnite with a brush
or broom.
(4) Leather equipment will be treated with shoe impreg-
nite.
(5) Instructions will be given that in the theater of opera-
tions impregnated top covers for scout cars and personnel
carriers when not over the vehicle will be used inside the
vehicle to cover extra ammunition, rations, and personal
equipment.
■ 7. Methods of Decontamination. — o. Natural means. —
Persistent chemicals evaporate slowly and the time that they
will remain on open surfaces is affected by temperature and
wind. Some of the chemicals react with water and become
harmless, especially when mixed with mud. Therefore, the
weather elements and the scouring action and presence of
mud tend to decontaminate the vehicle. It is quite possible
that a tank might be heavily contaminated in the early
morning and if run all day, particularly on a hot humid
day over muddy terrain, might be sufHciently decontaminated
by evening to be safe. On the other hand, if a more rapid
means is not applied, the crew's efficiency will be reduced by
the prolonged wearing of the gas mask, and in the case of
open vehicles the personnel will probably be burned by con-
tact with the liquid chemical. Therefore, manual means of
decontamination should be used at the earliest opportunity
consistent with the mission.
b. Manual means. — (1) First echelon. — First echelon de-
contamination is performed by the crew of the vehicle with
the equipment normally carried in the vehicle. This is usu-
ally sufficient to keep the vehicle in action with small loss in
efficiency. However, it is not sufficient to allow maintenance
work on the undercarriage or motor to be performed by un-
4
DECONXAMINAnOW OF VEHICLES
7-8
protected personnel. First echelon decontamination is per-
formed on the order and under the supervision of the vehicle
commander.
(2) Second echelon. — Second echelon decontamination is
performed by the crew of the vehicle and specially trained
men in company headquarters with the equipment carried
by the company. It is done after first echelon decontamina-
tion has been completed. Second echelon decontamination
If efficiently performed, makes the vehicle safe for the crew.
Maintenance personnel can then perform their work with-
out protection. The amount of decontaminating equipment
and material carried by the company is sufficient to decon-
taminate thoroughly about one-half of the vehicles. Sec-
ond echelon decontamination is carried out on the order and
under the supervision of the company commander.
(3) Third echelon. — Third echelon decontamination is per-
formed at decontaminating points in maintenance areas, by
maintenance personnel on contaminated vehicles that are
sent directly to the maintenance parks for mechanical re-
pair. Third echelon decontamination is thorough and is
done quickly by crews of the disabled vehicles and operators
of power-driven equipment using equipment and material
normally carried by maintenance units. Third echelon de-
contamination is carried out on the order and under the
supervision of the maintenace unit commander.
(4) Mass. — The equipment and material carried in com-
panies is not sufficient to decontaminate all vehicles when
ithey have been heavily contaminated. In cases where units
tiave been contaminated by a large-scale gas attack, it may
become necessary to distribute additional material and or-
ganize the entire unit for decontamination. First, second,
and third echelon decontamination methods are employed.
Mass decontamination is normally carried out by the orders
and under the supervision of the regimental or higher com-
manders.
Section II
MATERIALS AND EQUIPMENT
■ 8. Materials. — a. DANC M-4. — (1) Decontaminating agent,
noncorrosive, is commonly called "DANC." Two types, M-4
and M-3, may be used by the Armored Force. DANC M-4
5
3
ARMORED FORCE FIELD MANUAL
is standard for use in apparatus, decontaminating, in the
Armored Force. It is noninflammable and noncorrosive to
metals except when left in contact for a considerable period
of time in the presence of moisture. It does not affect fabric
or leather but will decompose rubber and plastics if left in
contact for any length of time.- It should never be used on
the eyelens of the gas mask as the transparency of the lens
•will be destroyed. It neutralizes all known persistent chemi-
cal agents immediately. It evaporates quickly and little dis-
coloration of surfaces Is left. Its fumes are toxic, and the
gas mask should be worn when it is being used. It irritates
the skin if left in contact with it for any length of time.
When prepared for use it is a liquid and is effective only for
about 6 months.
(2) It Is shipped In compartmented containers with active
agent in dry powder form in one compartment and the sol-
vent In a separate compartment. In this container it will
keep indefinitely. The amounts in each container are in
the proper proportions to be mixed and form 5 gallons of
r>ANC. It should be stirred thoroughly while being mixed
and should be strained when poured into the apparatus,
decontaminating. Personnel should adjust gas masks before
mixing and loading DANC.
b. DANC M-3. — This Is similar in action to DANC M-4 and
is shipped in the same type of container. It is not standard
for the Armored Force but might have to be used in case
of a shortage of M-4. It leaves a white coating on the sur-
face of the vehicle after its use, similar in appearance to
whitewash, and this must be rubbed off immediately before
it sets; otherwise it must be removed with an abrasive or
steel brush.
c. Chloride of lime. — (1) This agent is standard for de-
contamination of undercarriages of vehicles and also for the
decontamination of rubber and plastic items of equipment.
It destroys fabric and leather items and corrodes bright metal
surfaces. Therefore, it must not be used on the working
parts of weapons or in the engine compartment. It deteri-
orates slowly in contact with air and moisture and should be
kept in the airtight metal container in which it is shipped
until it is to be used. In dry powder form it is not very
effective, as it is difBcult to get it into close contact with
6
DECONTAMINATION OF VEHICLES
8
persistent gas. Furthermore, if it is
tact with mustard gas in liquid form,
and heat is generated.
(2) When chloride of lime is to be
the undercarriages of vehicles that
mud or to decontaminate rubber or
ment, it is mixed with water to form
mixture). Chloride of lime slurry
brought Into close con-
, the reaction is violent
used to decontaminate
have been cleaned of
plastic items or equip-
a slurry (a thin watery
is prepared by mixing
ACETYLENE TETRACHLORIDE
(CLEAR LlOHiU)
M-4
(WHITE POWDER)
II -
[]/■
Figure 1. — Container DANC.
four parts chloride of lime with three parts water, by volume.
In preparing this slurry, a small amount of water should
first be added and the lime worked into a paste. When all
lumps are worked out, the remainder of the water is added
and the slurry thoroughly stirred for several minutes. Chlo-
ride of lime may be added to mud to form a mud-lime slurry.
This is done when it is necessary to decontaminate the under-
carriages of tanks by wallowing them rather than taking time
to clean off the surfaces first. In preparing a mud-lime
slurry course, 4 pounds of chloride of lime per lineal yard of
7
8-9
ARMORED FORCE FIELD MANUAL
the course is scattered over the mud. 200 pounds of chloride
of lime are sufficient to prepare a course 50 yards long.
(3) Chloride of lime destroys persistent chemicals effec-
tively but rather slowly. It Is a satisfactory method in
second echelon and mass decontamination but is too slow
for third echelon decontamination when it is desired to start
maintenance work immediately.
d. Other materials. — (1) Water. — Water will hydrolyze,
Lewisite Quite rapidly, causing the agent to cease to give off
toxic vapors. However, it leaves a toxic coating in powder
form which on contact will produce burns almost as serious
as the agent itself. Therefore water should not be used for
decontamination unless nothing better is available.
(2) Gasoline. — Gasoline will dissolve liquid persistent
chemicals and may aJso be used to burn them off metal
surfaces.
(3) Diesel fuel. — ^This heavier oil may be used to dissolve
the liquid chemicals ; however, it cannot be used to burn them
off.
(4) Rags. — Rags and cotton waste issued for cleaning pur-
poses are required in wiping off weapons and the interior
of vehicles with DANC and for the same purpose with lime
slurry in decontaminating rubber and plastic items of equip-
ment. They are the most readily available materials from
which to make torches to be dipped into gasoline for swab-
bing and burning off contaminated surfaces. Two or three
swabs, made by tying or wiring rags or waste to one end
of a light stick about 24 inches long, should be available in|
vehicles for immediate use.
■ 9. Equipment. — a. Apparatus, decontaminating, lY^-Quart
(.decon-lYz) . — This is a small, hand-operated, fire-extin-
guisher type apparatus used for spraying agent, decontam-
inating, noncorrosive (DANC). It is normally carried filled
with DANC M-4 and is kept ready for instant use. If it
is not used in 6 months it must be refilled. The nozzle should
be examined at frequent intervals and, if necessary, should
be cleaned out with a knife or wire to prevent it from be-
coming plugged or corroded.
b. Apparatus, decontaminating, hand, 3-gallon pressure
type (ciecon-3) . — This is a portable, hand-operated apparatus
used for spraying DANC. It is normally carried in the com-
8
DECONTAMINATION OF VEHICLES
9
9
ARMORED FORCE FIELD MANUAL
pany supply truck. When chemical agents are being used
by the enemy this apparatus is normally carried loaded. Be-
fore chemical agents come into general use it is normally
carried empty. If loaded and not used it must be refilled
each 6 months. It is operated by pumping the handle 20 to
25 strokes which builds up a pressure in the container. The
shut-oflf valve Is then opened and the spray is operated until
the pressure runs low, at which time the pressure must again
be built Up by the use of the pump. Some early models of
Figure 3. — Apparatus, decontaminating, hand, 3-gaUon pressure
type (decon-3 ) .
this apparatus have a screen In the bottom of the delivery
tube. This screen should be removed. After the apparatus
is used the nozzle should be unscrewed and cleaned.
c. Apparatus, decontaminating, power-driven (.deconr-
PD) . — (1) This apparatus is transported on a 2y2-ton, 6 by 6
truck chassis and is operated by a power take-off from the
truck motor. It is contained in the equipment of main-
tenance companies in the Armored Force. It has a tank
10
DECONTAMINATION OF VEHICLES
9-10
capacity of 400 gallons. It can be used to pump from the
tank container or directly from a pond or stream. It can
be used with spray nozzles to spray chloride of lime slurry,
or it can be used with a jet nozzle to throw water at 600
pounds per square inch pressure for the purpose of rapidly
cleaning mud from vehicles.
(2) Before chloride of lime is loaded into this apparatus,
external surfaces should be lightly oiled with crank case
drainings, using rags to apply the oil. After lime slurry is
used the apparatus should be cleaned by filling with water
up to agitator shaft and pumping out two or three times. The
tank should always be kept about half full of water to pre-
vent opening of seams.
d. Cleaner, high pressure, chemical and steam. — ^This appa-
ratus is a quartermaster item of equipment, issued to certain
maintenance units. When available in the field it is useful
in decontaminating for the removal of heavy coatings of
grease and oil, particularly from the engine compartment.
e. Other equipment. — (1) Cleaning brushes normally car-
ried in tanks are useful in cleaning the vehicle so that the
DANC can be applied directly to the metal surface. When
these brushes are used for this purpose they must be decon-
taminated with DANC before they are placed back in the
tank.
(2) When operating during rainy seasons over terrain that
is normally muddy, a scraper hook for the removal of mud
and debris should be improvised and carried with the pioneer
tool equipment. This tool can be made by company mechan-
ics, when materials are available, with a scraper in the gen-
eral form of a putty knife approximately 4 inches wide on
one end of a straight handle approximately 40 inches long,
to the other end of which is attached a hook measuring ap-
proximately 6 inches from point to shank.
■ 10. Testing Equipment. — It is known that the enemy pos-
sesses a new type of vesicant gas, known as HN-2, which is
about as effective as the present well-known mustard gas,
but is colorless and almost odorless. This agent is difQcult to
detect as it may be mistaken for rain or dewdrops. Since
armored vehicles frequently get dewdrops on them from
vegetation in the early morning hours, it is necessary to have
11
10
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OP VEHICLES
10
certain positive means for indicating the presence of vesi-
cant gas.
a. Faint, liquid vesicant detector. — (i) This paint is con-
ventional olive drab in color. When drops of liquid vesicant
chemicals come in contact with it, the affected spots turn red
for all known vesicant agents. It is used by painting a
panel on the front apron of the tank or the hood of other
vehicles to warn personnel of the presence of vesicant agents.
It should also be used in the interior of tanks to paint Small
panels just below the ring of the turret and at points around
doors to warn the crew of the presence of liquid chemicals
in the tank.
(2) Detector paint will not give warning of the agent
in vapor form.
(3) Detector paint should be removed and replaced with
a new coat every 14 days, or after a gas attack.
b. Crayon, vesicant detector. — ^This item has the appear-
ance of an ordinary piece of red chalk for blackboard use.
It is slightly more fragile and crumbles more easily. It is
protected by a wrapping of heavy paper which must be
peeled down as the crayon becomes worn by use. This item
is of particular value in testing for the presence of liquid
vesicant chemicals on metal surfaces. It will find its great-
est application in case of emergency repairs when it is un-
certain as to whether or not it is safe to touch the parts of
the vehicle that need adjustment or repair. The crayon is
applied to the parts in question by making marks as with
ordinary chalk. If the color of the marks remains red the
surface is safe to handle. If the color of the marks changes to
blue there is a vesicant chemical present.
c. Kit, HS vapor detector. — ^This apparatus is for the
purpose of testing air for the presence of mustard gas in
vapor form. It is furnished to all unit gas officers and cer-
tain gas noncommissioned ofScers in the Armored Force.
It may be used to test the air Inside of vehicles, particularly
tanks, for the presence of gas after they have been decon-
taminated as a check on the thoroughness of decontamina-
tion. It is also used to test the air in wooded areas which
are reconnoitered for bivouac areas or for the concealment
of maintenance paxks, distributing points, etc. When gas is
present in the air the contents of the test tube turn blue in
484956°— 42 2
13
10-12
ARMORED FORCE FIELD MANTIAL
color after being heated by the flame from a match and
treated with a reagent. Directions for Its operation are con-
tained in the lid of the container.
Section III
PROCEDURE
■ 11. General. — ^It must be kept constantly in mind that the
primary purpose in decontamination is not to remove the
persistent chemicals from the equipment and vehicle, but
rather to allow the enemy's use of them to interfere as little
as possible with operations. This basic fact calls for speed
in all echelons of decontamination and in first echelon de-
contamination calls for the removal of only that portion of
the chemical on the equipment and vehicle which interferes
with the efiScient functioning of the crew In the vehicle. All
personnel must be familiar with the various steps in first
echelon decontamination of the vehicle to which they are
assigned. However, certain individuals should have definite
assigned duties in order to save the time required for the
vehicle commander to give instructions in each case. These
assigned duties may be varied from time to time to fit chang-
ing conditions.
■ 12. First Echelon. — a. Light tanks. — (1) Equipment.
One 11/2 -quart apparatus, decontaminating, filled with
DANC.
Gasoline.
Rags Or waste (two or three swabs made by tying or
wiring rags or waste to one end of light sticks of
wood 18 to 24 inches long) .
One crayon, detector.
(2) Procedure. — (a) When a chemical attack is believed
to be imminent, close the tank if it is open. When tank is
contaminated, adjust masks immediately. Any first-aid
measures made necessary by the action of the gas before gas
masks were put on are taken at once. As soon as conditions
permit, the head, upper body, and arms of personnel are in-
spected for drops of liquid chemical that may have entered
the tank. The tank commander and assistant driver inspect
the driver. The tank commander and the gunner inspect
each other, and the gunner inspects the assistant driver.
14
DECONTAMINATION OF VEHICLES
12
Any drops found are wiped off and protective ointment is
applied on the contaminated spots in accordance with in-
structions on the tube.
(b) If contamination is from air attack or explosion of
shell or bomb, gunner hands decon-l'/a to tank commander
and holds three cloths or pieces of waste to be saturated
with DANC. Tank commander saturates cloths with DANC.
Gunner hands one cloth to assistant driver and one to driver
who wipe around cracks and openings as much as possible
while tank continues moving. Driver devotes his attention
to driving the tank, but while doing so wipes off his controls
and surfaces around door in front of him where liquid chem-
ical may enter. Gunner wipes off 37-mm gun and inside of
turret with partic.ular attention to the surface at the bottom
of the turret ring. The tank commander tests likely places
with crayon and points out to gunner any additional surfaces
that may need to be decontaminated. Cloths may have to be
saturated several times If liquid chemical has entered into the
turret.
(c) When it is believed that the tank has passed out of the
contaminated area and the tactical situation is such that the
tank can be stopped for 2 or 3 minutes without undue danger
of exposing personnel, the tank is turned facing into the wind
and stopped. Turret door is opened, gunner wipes oft edge
of turret with rag saturated with DANC. Gunner vaults to
sitting position on turret and takes decon-1 Va and swab from
tank commander. Gunner sprays DANC on front of turtet,
climbs out of turret, spraying and swabbing a clear path in
front of him as he advances. Spray is moved continuously
across the surface to secure even distribution and to conserve
DANC. Tank commander follows gunner with swab, spread-
ing DANC over tank as gunner sprays it from decon-1 1/2.
Gunner and tank commander clean off front of tank and
weapons with particular attention to surfaces around points
where air enters tank and around edges of driver's and as-
sistant driver's doors. Gunner works around front of tank
to other side and sprays around turret ring. When front of
tank has been sprayed, driver's and assistant driver's doors
are opened to allow air to pass through tank and speed up
clearing the tank of DANC fumes. The glass in vision slits
and periscopes must be .wiped off from the outside with a
15
12
ARMORED FORCE FIELD MANUAL
dry cloth to prevent fogging when decontamination of front
of tank is completed.
(d) While tank commander and gunner work outside,
driver and assistant driver clean up inside of tank, assist-
ant driver moving into rear compartment to do any additional
work necessary there. Detector crayon is used to recheck
machine guns, controls, 37-mm gun, ammunition, and walls
of turret and crew compartment for satisfactory decontam-
ination. Any further decontaminating indicated is per-
formed at once.
Figure 6. — Do not stop the tank as soon as It Is contaminated.
Continue until out of the contaminated area. If you decontami-
nate while In the area, tank will be recontaminated from vege-
tation when you start.
(e) At the conclusion of the decontamination work, all
weapons, instruments, and machined surfaces which have
been treated with DANC are reoiled by wiping with oily
waste. Then all waste and rags used are thrown away.
(/) Gas masks must be worn until DANC fumes have
disappeared from tank. This time will vary widely with
the temperature, being less on warm days. If the tactical
situation permits, the tank can be cleared of these fumes
16
DECONTAMINATION OF VEHICLES
12
Figure 7. — When tank has become contaminated, carry out your
mission wearing gas masks and protective gloves. Decontaminate
Interior of tank as you continue on your mission.
Figure 8. — Decontaminate surface of tank in front of you as you
go, being sure you are standing on decontaminated surface.
17
12
ARMORED FORCE FIELD MANUAL
much more quickly if run for the first few minutes with
doors open to Increase the flow of air through the crew
compartment. When the strong odor of DANC fumes is
not detected when testing for gas, the gas mask may be
removed. This will vary from 10 to 30 minutes according
to temperature and amoimt of air that has passed through
the tank.
(3) Alternate meihods. — (a) In case DANC is not available
the tank can be decontaminated reasonably well by using
PiGTniE 9. — Do not touch, walk on or sit on surfaces before they
are decontaminated. Tou will become contaminated and carry
the agent back Into the tank. The amount of agent you will
get on your clothing in touching, sitting on, or sliding off a
tank will be so great that, coupled with the rubblng-in action.
It win penetrate the protective clothing and burn the skin.
gasoline, but it will take much longer. The use of gasoline
on interior surfaces is dangerous because of the subsequent
fire or explosion hazard.
1. Interior should be wiped with cloths saturated in
gasoline and then thoroughly wiped with dry
cloths. Gasoline does not destroy the chemical
but dissolves it. and assists in its removal by
18
DECONTAMINATION OF VEHICLES
12
mechanical means. This procedure should be
carried out at least twice and then results should
be thoroughly checked with crayon detector for
evidence of places requiring further cleaning.
After using gasoline on the interior surfaces,
thoroughly ventilate the crew compartment to
eliminate danger of fire or explosion.
2. Exterior of tank which carries the bulk of the agent
should be dampened with gasoline and burned
Figure 10. — When burning off chemical agent, decontaminate a
small panel at one time with a small amount of gasoline. Stand
on the ground up wind from the surface being decontaminated
so that the flames and heavy vapor concentrations will be blown
away from you.
off. Two members of the crew should wrap
their shoes in rags before dismounting and dis-
card the rags before reentering tank. Be sure
to work on up wind side of tank. One member
applies gasoline with swab over a small portion
of the surface. The other member ignites it
with lighted swab. The lighted swab should
be rubbed across the surface several times as
19
12
ARMORED FORCE FIELD MANUAL
Figure 11. — Do not attempt to burn off tank from above.
Figure 12. — Do not pour a large quantity of gasoline on the tank.
Some of it will probably run into tank through openings, carry-
ing the chemical with it. Used in large quantities it is a fire
hazard.
20
DECONTAMINATION OF VEHICLES
12
the first flash of the gasoline does not furnish
sufficient heat to drive off all the chemical.
This process is continued until all the necessary
surface is burned over. The procedure must
be carried out twice. The gasoline should not
be poured over the tank in large quantities as
it may run into the tank around openings, car-
rying the chemical into the tank with it and
creating a dangerous flre hazard,
(b) When neither DANC nor gasoline is available, Diesel
oil may be used.
1. Proceed as with gasoline on interior.
2. Exterior is treated in a similar manner to the
interior. Since the exterior will be much more
heavily contaminated than the interior, the
process of alternately washing off with oil and
rubbing with dry cloths or waste will probably
have to be repeated several times.
&. Medium tanks. — (1) Equipment.
Two 1 Vz -quart apparatus, decontaminating, filled with
DANC.
Gasoline.
Rags or waste (four or more swabs made by tying or
wiring rags or waste to one end of light sticks of
wood 18 to 24 inches long).
One crayon, detector.
(2) Procedure for medium tank M3. — (a) When a chem-
ical attack is believed to be imminent, close the tank if it is
open. When tank is contaminated adjust masks imme-
diately. Any first-aid measures made necessary by the ac-
tion of the gas before gas masks were put on are taken at
once. As soon as conditions permit, the head, upper body,
and arms of personnel are inspected for drops of liquid
chemical that may have entered the tank. Tank commander
inspects 37-mm gunner who in turn inspects tank com-
mander; 37-mm gunner inspects the radio operator; the
radio operator Inspects the driver, and the 75-mm leader
and 75-mm gunner inspect each other. Any drops found
are wiped off and protective ointment is applied on the
contaminated spots in accordance with instructions on the
tube.
21
12
ARMORED FORCE FIELD MANUAL
(b) If contamination is from air attack or explosion of
shell or bomb, radio operator takes decon-li^ and saturates
six rags or pieces of waste held by the 75-mm gunner. The
75-mm gunner then hands saturated cloth to each member
of the crew. While these cloths are being sprayed with
DANC, 75-mm loader takes second decon-lV^ from its stow-
age place. Driver devotes his attention to driving tank,
but while doing so wipes off his controls, surfaces around
door, and around any points in front of him where liquid
chemical may enter. Radio operator, 75-mm gunner, and
75-mm loader wipe inside of turret ring near them. All
crew members devote their attention to area around them,
the 75-mm gunner giving particular attention to inside sur-
faces around his gun mount. The 75-mm loader pays par-
ticular attention to inside of hatch above him. The tank
commander supervises checking of surfaces with detector
crayon, and any additional work Indicated is performed.
Cloths may have to be saturated several times if liquid
chemical has entered the turret.
(c) When it is believed that the tank has passed out of
the contaminated area and the tactical situation is such that
the tank can be stopped for 2 or 3 minutes without undue
danger of exposing personnel, the tank is turned facing into
the wind and stopped. The 75-mm loader opens hatch above
him and wipes off edge of hatch opening with rag saturated
with DANC. He then vaults to a sitting position on hatch
cover and takes decon-l^^ and swab from 75-mm gunner.
The 75-mm loader sprays DANC and swabs off area on
which to stand. The 75-mm gunner then climbs through
open hatch with swab to assist in decontaminating. Spray
is moved continuously across the surface to secure even
distribution and to conserve DANC. The 37-mm gunner turns
turret two complete revolutions while 75-mm loader and
75-mm gunner spray and swab front of turret rings and top
hatch. On first revolution lower turret ring and front of
turrets are decontaminated. On second revolution the ring
at base of cupola, front of cupola, and top hatch are decon-
taminated. The men on outside of tank must watch 37-mm
gun when turret revolves to avoid being knocked off the tank.
The 75-mm loader and 75-mm gunner then work down right
front and over to left of tank, spraying and swabbing as they
22
DECONTAMINATION OF VEHICLES
12
advance. Particular attention is given to points where air
enters tank, including 75-mm gun mount and areas around
driver's door. When front of tank has been sprayed, driver's
door is opened so that air may pass through tank and speed up
clearing tank of DANC fumes. If second decon-iy2 is needed,
it can be passed through driver's window. The glass in vision
slits and periscopes must be wiped off from the outside with
a dry cloth to prevent fogging when decontamination of front
of tank is completed.
(d) At the same time, driver and radio operator recheck
condition of driving controls, radio, and 75-mm gun, using
crayon detector. The tank commander rechecks guns, am-
munition, and walls of his turret. Any further decontaminat-
ing indicated is performed at once.
(e) At the conclusion of the decontamination work all
weapons, instruments, and machined surfaces which have
been treated with DANC are reoiled by wiping with oily waste.
Then all waste and rags used are thrown away.
(/) Gas masks must be worn until DANC fumes have
disappeared from tank. This time will vary widely with the
temperature, being less on warm days. If the tactical situa-
tion permits, the tank can be cleared of these fumes much
more quickly if run for the first few minut«s with doors open
to increase the flow of air through the crew compartment.
If the strong odor of DANC fumes is not detected when testing
for gas, the gas mask may be removed. The time will vary
from 10 to 30 ' minutes according to the temperature and
amount of air that has passed through the tank.
(3) Procedure for medium tank Mi. — (o) When a chemi-
cal attack is imminent, close tank if it is open. When tank
is contaminated adjust masks immediately. Any first-aid
measures made necessary by action of the gas before gas
masks were put on are taken at once. As soon as conditions
permit, the head, upper body, and arms of personnel are in-
spected for drops of liquid chemical that may have entered
the tank. Tank commander inspects the gunner and the
loader; In turn, the gunner inspects the tank commander;
the driver inspects the assistant driver, and the assistant
driver inspects the driver. Any drops found are wiped off
and protective ointment is applied on the contaminated spots
in accordance with instructions on the tube.
23
12
ARMORED FORCE FIELD MANUAL
(b) If contamination Is from air attack or explosion of
shell or bomb, loader takes decon-li/^ and hands it to tank
commander. Loader then holds four cloths or pieces of waste
to be saturated with DANC. Tank commander saturates
cloth with DANC. Loader hands two cloths to driver who
gives one to assistant driver. Loader also hands one cloth
to gunner. Driver devotes his attention to driving tank and
while doing so wipes off his controls, surfaces around
hatch, and around any points where liquid chemical may
enter. Assistant driver wipes around ventilator and around
his hatch. Gunner wipes inside surfaces on his side of 75-
mm gun and gun mount, and around turret ring and turret
walls near him. Loader wipes off his side of 75-mm gun
and mount, turret ventilator, periscope, and turret ring and
turret walls near him. Tank commander wipes aroimd in-
side of top hatch and also gives attention to turret ring
and turret walls. The tank commander tests likely places
with detector crayon and points out to gunner and loader
any additional surfaces that may need to be decontaminated.
Cloths may have to be saturated several times if liquid
chemical has entered into the tank.
(c) When it is believed that the tank has passed out of
the contaminated area and the tactical situation is such
that the tank can be stopped for 2 or 3 minutes without
undue danger of exposing personnel, the tank is turned
facing into the wind and stopped. Tank commander opens
turret hatch, wipes off edge of turret opening with rag
saturated with DANC, and vaults to a sitting position on
turret. Loader hands decon-iy2 and swab to tank com-
mander. Tank commander sprays DANC and swabs off
sufBcient area on top of turret to provide a place to stand
while additional areas are sprayed. Spray is moved con-
tinuously across the surface to secure even distribution and
to conserve DANC. Loader climbs through turret opening,
taking swab with him, and assists tank commander. Tank
commader and loader work down left front of tank and over
to right front, spraying and swabbing in front of them as
they advance. Particular attention Is given to surfaces
around points where air enters into the tank and around
edges of driver's and assistant driver's doors. Base of turret
ring can be sprayed when standing on left and right spon-
24
DECONTAMINATION OF VEHICLES
12
sons. Second decon-iy2 may be used when DANC In first
is exhausted. When front of tank has been decontaminated,,
driver's and assistant driver's doors are opened so that air
may pass through tank and speed up the removal of DANC
fumes. The glass in vision slits and periscopes must be wiped
off from the outside with a dry cloth to prevent fogging
when decontamination of front of tank is completed.
(d) At the same time, driver and assistant driver recheck
condition of driving controls and weapons, using crayon de-
tector for this purpose. The gunner rechecks guns and am-
munition and walls of turret. Any further decontaminating
indicated is performed at once.
(e) At the conclusion of the decontamination, all weapons,
instruments, and machined surfaces which have been treated
■with DANC are reoiled by wiping with oily waste. All waste
and rags used are then thrown away.
(/) Gas masks must be worn until DANC fumes have dis-
appeared from tank. The time will vary widely with the
temperature, being less on warm days. If the tactical situa-
tion permits, the tank can be cleared of these fumes much
more quickly if run for the first few minutes with doors open
to increase the flow of air through the crew compartment.
When the strong odor of DANC fumes is not detected when
testing for gas, the gas mask may be removed. The time
will vary from 10 to 30 minutes according to the temperature
and amount of air that has passed through the tank.
(4) Alternate methods. — (a) In case DANC is not available
the tank can be decontaminated reasonably well by using
gasoline, but It will take much longer. The use of gasoline
on interior surfaces is dangerous because of subsequent fire
or explosion hazard. - tM. :
1. Interior should be wiped mth cloths saturated in
gasoline and then thoroughly wiped with dry
cloths. The gasoline does not destroy the chemi-
cal but dissolves it and assists in its removal by
mechanical means. This procedure should be
carried out at least twice and then results
thoroughly checked with crayon detector for
evidence of places requiring further cleaning.
After using gasoline on the interior surfaces,
25
12
ARMORED FORCE FIELD MANUAL
thoroughly ventilate the crew compartment to
eliminate the danger of fire or explosion.
2. Exterior of tank which carries the bulk of the agent
should be dampened with gasoline and burned
ofE. Two members of the crew should wrap
their shoes in rags before dismounting and dis-
card the rags before reentering tank. Be sure
to work on up wind side of tank. One member
applies gasoline with swab over a small portion
of the surface. The other member ignites it
Figure 13. — Do not stop the tank as soon as It Is contaminated.
Continue until out of contaminated area. If you decontaminate
while in the area, tanlc will be recontaminated from vegetation
when you start.
With lighted swab. The lighted swab should be
rubbed across the surface several times, as the
first flash of the gasoline does not furnish sufQ-
cient heat to drive off all of the chemical. This
process is continued until all the necessary sur-
face is burned over. The procedure must be
carried out twice. The gasoline should not be
poured over the tank In large quantities as it
DECONTAMINATION OF VEHICLES
12
may run into the tank around openings, carry-
ing the chemical into the tank with it and
creating a dangerous fire hazard,
(b) When neither DANC nor gasoline is available Diesel
oil may be used.
1. Proceed as with gasoline on interior.
2. Exterior is treated in a similar manner to the in-
terior. Since the exterior will be much more
heavily contaminated than the interior, the
process of alternately washing off with oil and
rubbing with dry cloths or waste will probably
have to be repeated several times.
Figure 14. — ^When tank has become contaminated, carry oiir your
mission wearing gas masks and protective gloves. Di'i-^niUim-
inate Interior of tank as you continue on your mission.
c. Scout car and personnel carrier, half-track. — (1) Equip-
ment.
Two 1 1/2 -quart apparatus, decontaminating, filled with
DANC (in scout cars) .
Three 1% -quart apparatus, decontaminating, filled
with DANC (in personnel carrier, half-track) .
Gasoline.
12
ARMORED FORCE FIELD MANUAL
Rags or waste including three or four swabs made by
tying or wiring rags or waste to one end of light
sticks of wood 18 to 24 inches long.
One crayon, detector.
(2) Procedure. — (a) As soon as it is seen that the scout
car (or personnel carrier) is to be subjected to airplane
spray attack, adjust cellophane covers and mask if time is
available; otherwise, mask as soon as firing at airplane has
ceased. After adjusting his own cover, car commander assists
driver in adjusting his cover. Car commander closes radiator
Figure 15. — ^Do not slide off tank without thoroughly decontami-
nating a path ahead of you. Sitting on or sliding down con-
taminated surfaces will grind the liquid chemical Into your
Impregnated clothing In such qu'antlty that It cannot protect
you, and serious burns will result.
shutters to prevent spray being pulled into motor compart-
ment. If car is contaminated from explosion of shell or
bomb, adjust gas masks immediately. When air attack is
over, prepare another cover for Immediate use, stop vehicle,
and remove cellophane covers as follows: Men on up wind
side remove covers successively, commencing with the man
In front, and throw them over the down wind side; when
28
DECONTAMINATION OF VEHICLES
12
Figure 16. — Clean a path ahead of you as you descend so that you
win not be contaminated by the gas drops or splashes on the
vehicle.
Figure 17. — Do not stand where flash of burning gasoline will
reach you.
484956 °-^2 3 29
12
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF VEHICLES
12
this is completed, the men on the down wind side successively
remove covers In the same manner and throw them over the
side. The car commander removes the driver's cover before
removing his own. Car commander then opens radiator
shutters. Crew members will immediately be inspected for
drops or splashes of liquid chemical on their bodies or cloth-
ing. The car commander inspects the driver. Then he and
the other crew members acting in pairs inspect each other.
Any drops or splashes found are blotted off, protective oint-
ment is applied to the contaminated spots, and any other
first-aid measures indicated are taken.
(b) When car is contaminated from air attack or shell or
bomb explosion, radio operator takes decon-1% and sprays
cloths held by car commander. When cloths are saturated
with DANC, car commander hands one to each member in
front compartment of vehicle. Each man then proceeds to
wipe off contaminated spots from the inside of the car and
equipment around him, including contaminated seat cush-
ions. Decon-iyz is used to spray contaminated parts of
driver's compartment.
(c) The crew member nearest the decon-iy2 in the rear
of the vehicle applies DANC to cloths held by the crew
member opposite him and then sprays contaminated surfaces
and equipment. These saturated cloths are distributed to
the other crew members in the rear of the vehicle, and all
members proceed to swab the inside of the car, the weapons
and equipment in their part of the vehicle. The car com-
mander tests for satisfactory decontamination with the de-
tector crayon. Cloths may have to be saturated several
times.
(d) As soon as it is believed the car has passed out of the
contaminated area and the tactical situation permits halting
for 2 or 3 minutes, the car is turned sideways to the wind
and stopped. Car commander and two or three designated
members of the crew with one decon-1 V2 and swabs dismount,
being careful not to become contaminated from the mud
guards and ventilating shutters. They first decontaminate
the up wind side of the front of the car; the driver then
turns the car so that the other side faces into the wind, and
that side is decontaminated in a similar manner. Spray is
moved continuously across the surface to secure even dis-
31
12
ARMORED FORCE FIELD MANUAL
tribution and to conserve DANC. Remaining crew members
continue to clean the inside of vehicle, including weapons and
upper edge of armor plate. Attention is given to tarpaulins
used to cover supplies and equipment to make sure they are
thoroughly decontaminated. Supplies which have been
covered are examined and, if need be, are decontaminated.
The crayon detector is used frequently to check progress of
the work. Ground mounts for machine guns are sprayed and
swabbed.
Figure 20. — Men on up wind side remove covers successively, com-
mencing vfith the man in front, and throvp them over the down
wind side.
(e) At conclusion of the decontamination work all weap-
ons, instruments, and machined surfaces which have been
treated with DANC are reoiled by wiping with oily waste.
Then all waste and rags used are thrown away.
(/) It is necessary to continue wearing gas masks until
tests for gas show the strong odor of DANC fumes has dis-
appeared. This will ordinarily take only a short time after
the vehicle has again been put in motion.
(3) Alternate methods. — If DANC is not available, the car
32
DECONTAMINATION OP VEHICLES 12
PiGTjRE 22. — Do not remove cellophane covers while vehicle is in
motion or disregard direction of wind. Men on down wind side
who first remove covers will be contaminated by the covers
of the men on up wind side.
33
12
ARMORED FORCE FIELD MANUAL
can be decontaminated reasonably well by using gasoline,
but it will take much longer.
(a) Interior should be wiped off with cloths saturated
in gasoline and then thoroughly wiped with dry cloths. This
procedure should be repeated. The results should be checked
with the crayon detector for indication of places requiring
further cleaning. Gasoline does not destroy the agent, but
dissolves it and makes it easier to remove by wiping off.
(b) Outside surfaces on the front of the car can be mois-
tened with gasoline and burned off, though all occupants of
Figure 23. — Do not pour large amounts of gasoline over vehicle. It
may run down inside, carrying chemical agent into the motor
compartment and creating a flre hazard.
vehicle must first dismount. This work must be done on
the up wind side of the car. Gasoline is applied with a swab
over a small section of the surface, and is ignited with a
lighted swab. The lighted swab should be rubbed across
the surface several times because the first flash of the
gasoline does not furnish sufBcient heat to drive off all
the agent. The procedure must be carried out twice. After
one side of the front has been burned over, the car should
be turned so that the other side is up wind, and the process
34
DECONTAMINATION OF VEHICLES
12
DECONTAMINATION OF VEHICLES
12
completed. Gasoline should not be poured over the vehicle in
large quantities for it may run into the motor compartment,
creating a fire hazard and carrying the agent along with it.
d. Carriages, motor, 75-mm and 105-mm howitzer. — (1)
Equijyment.
Three iy2-tiuart apparatus, decontaminating, filled
with DANC.
Gasoline.
Rags or waste (including two or three swabs made
by tying or wiring rags or waste to one end of light
sticks of wood 18 to 24 inches long) .
One crayon, detector.
(2) Procedure for carriage, motor, 75-mm howitzer. — (a)
As soon as it is seen that the carriage is to be subjected to
airplane spray attack, adjust cellophane covers, and mask
if time is available; otherwise mask as soon as firing at the
airplane has ceased. Driver closes radiator shutters to pre-
vent spray being drawn into motor compartment. If carriage
is contaminated from explosion of shell or bomb, adjust gas
masks and take any first-aid measures made necessary by the
contamination of the crew from the chemical. When air
attack is over, prepare another cover for immediate use; stop
vehicle, and remove cellophane covers. The men on up wind
side remove covers first and throw them over the down wind
side; then men on the down wind side remove covers in a
similar fashion. Driver opens radiator shutters. Crew mem-
bers will immediately be inspected for drops or splashes of
liquid agent on their bodies or clothing. The car commander
inspects the driver. Crew members, acting in pairs, inspect
each other. Any drops or splashes found are blotted off, pro-
tective ointment is applied to the contaminated spots, and
other necessary first-aid measures are taken.
(b) When carriage is contaminated from air attack or
explosion of shell or bomb, car commander takes one decon-
IV2 and saturates with DANC necessary rags or pieces of
waste held for him by No. 1 cannoneer who then hands the
saturated cloths to the various crew members, including the
driver. The driver wipes off his controls and swabs any
splashes or drops around him which he can reach without
interfering with his driving. The crew members in the rear
of the vehicle, using saturated cloths, proceed to wipe off
484956° — 42 4 37
12
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF VEHICLES
12
inside of the car, weapons, and equipment around them.
Contaminated seat cushions are also swabbed. During this
time No. 2 cannoneer is spraying badly contaminated spots,
using the second decon-l>/^. The car commander tests for
satisfactory decontamination with the detector crayon.
Cloths may have to be saturated several times.
(c) As soon as the vehicle has passed out of the contam-
inated area and the tactical situation permits, the car is
turned sideways, so that the driver's side is up wind, and
stopped. The Nos. 1 and 2 cannoneers dismount, taking a
decon-lV2 and swabs, being careful not to become contam-
inated from the outside of the car. They then decon-
taminate the left front quarter of the car, including the
windshield armor, door, hood, mud guard, and ventilating
shutters, using decon-lV^ and swabs on sticks. Spray is
moved continuously across the surface to secure even dis-
tribution and to conserve DANC. After the up wind front
quarter of the car has been decontaminated, the driver turns
the car so that the other side faces into the wind and this
side is decontaminated in the same way. During this time,
driver and car commander spray and swab interior of vehi-
cle, including weapons. Attention is given to tarpaulins used
to cover supplies and equipment to make sure that they are
thoroughly decontaminated. Supplies which have been cov-
ered are examined and, if need be, are decontaminated. The
crayon detector is used frequently to check progress of the
work.
(d) At the conclusion of the decontamination work, all
weapons, instruments, and machined surfaces which have been
treated with DANC are reoiled by wiping with oily waste.
Then all waste and rags used are thrown away.
(e) Continue wearing gas masks until tests for gas show
the strong odor of DANC fumes has disappeared. This will
ordinarily take only a short time after the vehicle has
moved out.
(3) Procedure for carriage, motor, 105-mm howitzer. — (a)
As soon as it is seen that the carriage is to be subjected to
airplane spray attack, adjust cellophane covers and mask if
time is available; otherwise mask as soon as firing at plane
has ceased. After adjusting his own cover, chief of section
assists driver in adjusting his cover. If the carriage is con-
39
12
ARMORED FORCE FIELD MANUAL
tamlnated from explosion of shell or bomb, adjust gas masks
and take any first-aid measures made necessary by the con-
tamination of the crew from the chemical. When air attack
is over prepare another cover for immediate use, stop vehicle,
and remove cellophane covers as follows: men on up wind
side remove covers successively, commencing with the man
in front, and throw them over the down wind side; when
this is completed, the men on the down wind side successively
remove covers in the same manner and throw them over the
side. Chief of section removes the driver's cover before re-
moving his own. Crew members will Immediately be in-
spected for drops or splashes of liquid agent on their bodies
or clothing. The chief of section inspects the driver. Crew
members acting in pairs inspect each other. Any drops or
splashes found are blotted off, protective ointment is applied
to the contaminated spots, and any' necessary first-aid
measures are taken.
(&) When the carriage is contaminated from air attack
or explosion of shell or bomb, chief of section takes one
decon-li/2 and saturates with DANC three rags held by
gunner who then distributes saturated rags to chief of sec-
tion and driver, keeping one himself. Other crew members,
using remaining two decons-lV^, saturate rags and start
decontaminating inside of car, weapons, and equipment
around them. The driver wipes ofE his controls and swabs
any splashes or drops around him which he can reach
without interfering with his driving. Contaminated seat
cushions are also swabbed. Crew members use the decon-1 Vz
to spray badly contaminated spots. Chief of section tests for
satisfactory decontamination with the detector crayon.
Cloths may have to be saturated several times.
(c) As soon as the vehicle has passed out of the con-
taminated area and the tactical situation permits, the vehicle
is turned sideways to the wind and is stopped. When car
is brought to a halt, driver decontaminates his compartment
thoroughly. When No. 1 cannoneer has decontaminated
his part of the interior of the vehicle he steps over shield
onto front of carriage, spraying and swabbing as he advances.
Gunner decontaminates place to stand and steps over shield
onto front of carriage. Both men spray and swab front
of vehicle, including 105-mm howitzer and surfaces around
40
DECONTAMINATION OF VEHICLES
12
driver's door and pistol port. When front of vehicle has
been decontaminated, driver's door and pistol port may be
opened for ventilation. When decontamination of front of
vehicle is completed, glass in vision slit must be wiped off
with a dry cloth to prevent fogging. Attention is given
to tarpaulins used to cover supplies and equipment to make
sure that they are thoroughly decontaminated. Supplies
which have been covered are examined and, if need be, are
decontaminated. The crayon detector is used frequently to
check progress of the work.
(d) At the conclusion of the decontamination work, all
weapons, instruments, and machined surfaces which have
been treated with DANC are reoiled by wiping with oily
waste. All waste and rags used are then thrown away.
(e) It is necessary to continue wearing the gas masks
until tests for gas show the strong odor of DANC fumes has
disappeared. This will ordinarily take only a short time
after the vehicle has again been put in motion.
(4) Alternate methods. — If DANC is not available, the car-
riages can be decontaminated reasonably well by using gaso-
line, but it will take much longer.
(a) Interior should be wiped off with cloths saturated
in gasoline and then thoroughly wiped with dry cloths. This
procedure should be repeated, and then the results should
be checked with the crayon detector for indication of places
requiring further decontaminating. Gasoline does not de-
stroy the chemical, but dissolves it and makes it easier to
remove by wiping off.
(b) Outside surfaces on the front of the carriage can be
moistened with gasoline and burned off, although all per-
sonnel must first dismount. This work must be done on the
up wind side of the vehicle. The driver applies gasoline with
swab over a small section of the surface and then ignites it
with a lighted swab. The lighted swab should be rubbed
across the surface several times because the first flash of
gasoline does not furnish sufficient heat to drive off all the
chemical. The procedure must be carried out twice. After
one side of the front has been burned over, the vehicle should
be turned so that the other side is up wind and the process
completed. Gasoline should not be poured over the vehicle
in large quantities for it may run into the motor compart-
41
12
ARMORED FORCE FIELD MANUAL
Figure 30. — Men up wind remove covers successively, commencing
with tlie man in front, and throw them over the down wind
side.
DECONTAMINATION OF VEHICLES
12
12
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF VEHICLES
12-13
Figure 36. — Continue clean-up work, but be alert for possible
attack.
ment, creating a fire liazard and carrying the agent along
with it.
■ 13. Second Echelon. — a. Equipment. — In addition to any
material that may be left in vehicles after first echelon de-
contamination is completed, the company carries for second
echelon decontamination —
six decons — three filled with DANC.
200 pounds chloride of lime.
Rags or waste.
Crayons, detector.
Kit, HS vapor detector. (Carried by unit gas officers
and certain gas noncommissioned officers.)
Pioneer tools from vehicles.
b. Procedure. — (1) Second echelon decontamination is usu-
ally carried out before going into bivouac or at other times
when the company supply trucks can be sent forward from the
train.
(2) At a halt or when going into bivouac, contaminated
vehicles axe not sent out with security detachments if suffi-
45
13
ARMORED FORCE FIELD MANUAL
cient uncontaminated vehicles are available. When it is nec-
essary to send out contaminated vehicles before they can be
decontaminated, any available decons-1^4 which have not
been used in the company are exchanged for empty ones in
the vehicles sent out, and the crews are ordered to complete
decontamination of their vehicles with DANC as soon as they
have arrived at their posts.
(3) The area selected for decontamination should be down
wind from the bivouac area, preferably at least 54 mile dis-
tant. If vehicles are covered with mud, the area should be
near a pond or stream or other source of water where a wallow
course can be improvised.
(4) The company gas noncommissioned officer assists the
company commander in the lay-out and spotting of equip-
ment for second echelon decontamination.
(5) Vehicles are checked by vehicle commanders with de-
tector crayons under supervision of platoon commanders.
Platoon commanders report to the company commander
numbers and types of vehicles that require decontamination,
are not contaminated, or are doubtful cases.
A spot check of vehicles reported to be not contaminated
is made by the company gas noncommissioned oflficer to verify
the report. A careful check of doubtful cases is made, using
detector crayon and kit, HS vapor detector, to check for the
presence of persistent gas in vapor form which may have been
absorbed in grease in or on the vehicle or which has been
absorbed by equipment in the vehicle.
(6) All vehicles that are found to be uncontaminated but
which have been in gas during the day and have executed
first echelon decontamination are ordered to clean weapons
and instruments with gasoline and to reoil them. Vehicles
not requiring decontamination are dispatched to the bivouac
area or removed some little distance up wind from the de-
contamination area.
(7) The interiors of vehicles are decontaminated first,
then the exterior of the body; the undercarriages are de-
contaminated last.
(8) A decontamination point is established for each
platoon. Vehicles of company headquarters are attached
to platoons. In case the contamination of vehicles is not
uniform, the number of decontaminating points per platoon
46
DECONTAMINATION OF VEHICLES
13
Is varied in a manner to facilitate the completion of the
work In the shortest possible time. If six vehicles or more
are contaminated, three decontamination points, each pro-
vided with two decons-3 are established.
(9) Two men selected from company headquarters operate
the decons-3 at each decontaminating point. Members of
the vehicle crews use waste or rags to wipe off parts of
vehicle assigned to them in first echelon decontamination.
Vehicle commanders detail members of the crew to clean
backs of vehicles and engine compartments.
(10) Results are checked by vehicle commanders with de-
tector crayon and doubtful results are checked with the kit,
HS vapor detector.
(U) When undercarriages of vehicles are heavily en-
crusted with mud but not more than four vehicles require
decontamination of undercarriages, the decontamination is
done by hand methods. Mud is removed by driving the ve-
hicle through water or by removing It with pioneer tools,
sticks, or improvised scrapers. Chloride of lime slurry is
then applied with cleaning brushes. Mud is then thrown
over the slurry. A clay mud is desirable if available. This
mud coating removes the undesirable feature of having ve-
hicles with whitewashed undercarriages and also tends to
seal in and filter persistent gas vapors, as action of chloride
of lime is not immediate.
(12) When undercarriages of vehicles are not muddy, the
hand method is usually used regardless of the number of
vehicles to be decontaminated.
(13) When undercarriages are heavily encrusted in mud
and more than four vehicles are to be decontaminated, a
wallow course is laid out where undercarriages of vehicles
are decontaminated. The wallow course should be laid out
on a very muddy spot, preferably a low place covered by
6 to 8 inches of water. A small stream can be dammed
up or the edge of a swamp or pond can be used. A circular
course to accommodate the vehicle with the largest turning
radius is laid out. Then 200 pounds of lime are evenly
spread on the tracks. The vehicles are run around the
course five times in each direction. They should be run
as fast as practicable on the small circle and should be zig-
zagged to increase the scouring action of the lime-mud slurry.
47
48
DECONTAMINATION OF VEHICLES
13
49
50
51
52
DECONTAMINATION OF VEHICLES
13
53
13-14
ARMORED FORCE FIELD MANUAL
c. Alternate methods. — (1) (o) In case DANC is not avail-
able, chloride of lime slurry can be swabbed on the exterior
of the body and on the bottom and sidewalls of the engine
compartment. In using it in the interior of vehicles, it
is preferable to dampen rags with the slurry and wipe down
the interior walls to reduce risk of getting the slurry on equip-
ment it will destroy or injure. Take care that it does not
come in contact with fabric equipment or bright metal sur-
faces on weapons or instruments. Weapons and instruments
are then decontaminated by wiping them off with rags damp-
ened by fuel oil. This may have to be repeated several times
to produce satisfactory results.
(b) Undercarriages are decontaminated as already pre-
scribed.
(2) (a) In case neither chloride of lime nor DANC is
available the bodies of vehicles can be decontaminated
by repeated application of fuel oils as in first echelon
decontamination.
(&) When Undercarriages are not encrusted with mud,
the same method can be applied. However, they should not
be burned off due to the fire hazard. Flames may get out of
control by igniting oil and grease that may be on the under-
carriage. When undercarriages are heavily encrusted with
mud, they can be decontaminated by running 5 miles over
muddy terrain. This should not be done on a small course for
mud alone does not neutralize the agent but only removes it
mechanically by scouring action. On a small course the
mud will become so contaminated that the only effect
after the first few tanks have run over the course will be
to replace contaminated mud with more contaminated mud.
■ 14. Third Echelon. — a. Equipment.
One decontaminator, 400 gallons, power-driven, filled
with lime slurry.
Six decons-3 filled with DANC.
Rags and waste.
Crayons, detector.
Pioneer tools and brushes from vehicles.
Kit, HS vapor detector. (Carried by unit gas ofBcers
and certain gas noncommissioned officers.)
54
DECONTAMINATION OP VEHICLES
14
14
ARMORED FORCE FIELD MANUAL
Cleaner, high pressure, chemical and steam. (Avail-
able in certain maintenance units when carried in
field.)
b. Procedure. — (1) Third echelon decontamination is car-
ried out on contaminated vehicles which have been brought
directly to maintenance parks for repair and also in cases
where emergency field repairs on contaminated vehicles are
necsssary.
Figure 45. — ^When DANC Is not available, wipe off Interior with
cloth or waste dampened in Ume slurry. V/eapons are decon-
taminated with fuel oil.
(2) A decontamination point is set up down wind of other
installations In each maintenance park. It is located near
water when available.
(3) The company gas noncommisioned ofiacer under the
supervision of the company commander is in direct charge
of decontamination. The driver and assistant of the decon-
PD and, if present, crew members .of the disabled vehicles, do
the work, using the decons-3.
(4) Disabled vehicles arriving for repair stop at the decon-
tamination point and are checked for the presence of
chemical agent if there is any likelihood that they are
contaminated.
56
DECONTAMINATION OF VEHICLES
14
14
ARMORED FORCE FIELD MANUAL
(5) In third echelon decontamination, the mud and dust
are removed from outside of vehicle first, after which the
interior, body, and undercarriage are decontaminated. The
reason for this is that the force of the stream of water from
the decon-PD (600 pounds per square inch) when used on
the outside of the vehicle may drive some of the persistent
chemical into the interior.
(6) Tanks or other completely closed vehicles to be cleaned
with the power-driven decontaminator, using water and the
jet nozzles, are washed, starting at the top of the turret
and working down. The sides and undercarriages of scout
cars, half-track personnel carriers, and self-propelled gun
mounts are washed down starting from just below the
machine-gun rail with the nozzles pointed down at a sharp
angle so that water will not carry contaminated mud into
the interior of the body. Trucks, %-ton, may be washed
down all over. Operators should wear impervious clothing
with gas masks adjusted while doing this work. If impervi-
ous suits are not available, the cellophane covers will be the
next satisfactory.
(7) When steam cleaners are available they may be used
to remove grease from engine compartments.
(8) If lime slurry is to be used as the decontaminant, the
valve of the power-driven decontaminator is then turned
to pump from the tank and lime slurry is sprayed on the
outside of the body and undercarriage using the spray nozzle.
The decision as to using DANC or lime slurry is based on
how soon maintenance work is to be done on the outside
or undercarriage. If repairs are to be started in less than
3 hours, DANC should be used; otherwise, lime slurry should
be used due to its greater availability.
(9) The vehicle is then moved forward to uncontaminated
ground where the crew members are furnished with the
decon-3 to decontaminate the interior of body, engine com-
partment, and weapons, if lime slurry has been previously
used on the outside; otherwise, the entire vehicle is decon-
taminated with DANC. Weapons and bright metal surfaces
are next wiped off with rags dampened with fuel oil and
are then reoiled. Care must be taken that DANC does not
get into the interior of the motor.
58
DECONTAMINATION OF VEHICLES
14
59
14^15
ARMORED FORCE FIELD MANTTAl.
(10) The vehicle is thoroughly checked with crayon detec-
tor, and any additional decontamination work indicated is
done before it is moved to the mobile repair shops in the
maintenance area.
(11) When damaged contaminated vehicles are brought
in on rescue vehicles, the rescue vehicles must be checked
and decontaminated as indicated.
(12) Maintenance crews sent forward to make emergency
repairs carry one or two deoons-3 filled with DANC to
decontaminate the parts of the disabled vehicle that must
be handled. If the terrain is muddy and there are several
vehicles in the same locality that are known to be contami-
nated, and if the decon-PD can be spared at the decontami-
nating point, it should be taken forward filled with water
to save time in cleaning mud from the undercarriages of
the disabled vehicles.
c. Alternate methods. — (1) When neither DANC nor
chloride of lime is available, a solution made by adding 5
pounds of washing soda to each 100 gallons of water can be
used effectively in the decon-PD to remove much of the
contamination.
(2) When neither DANC nor lime is available, a mud
slurry may be used in the power-driven decontaminator in
place of lime slurry. It should be used with the jet nozzle
in place of the spray nozzle, however, as its principal ad-
vantage over water is the added scouring action of the
particles of grit in the mud. The mud slurry should be
carefully screened when it is prepared. A clay soil should
be used as any small stones or any considerable amount of
sand will injure the pump on the decontaminator. It should
be used only in an emergency when speed is essential. The
interior of the vehicle and weapons are decontaminated
with fuel oil, after use of the mud slurry as in first echelon
decontamination.
(3) When steam cleaners are available they may be used
to decontaminate the exterior of vehicles when DANC or
chloride of lime slurry cannot be obtained. This method
is slow but is faster than swabbing off or burning off the
exterior of vehicles with fuel oil.
■ 15. Mass. — a. Equipment. — ^All equipment noted in first,
second, and third echelon decontamination is needed.
60
DECONTAMINATION OP VEHICLES
15
ARMORED FORCE FIELD MANUAL
DECONTAMINATION OF VEHICLES
15
15 ARMORED FORCE FIELD MANUAL
Figure 52. — ^Do not allow power-driven decontaminator operators
to work in field uniforms. They will be splashed with
contaminated water and mud and burned.
FiGUKE 53. — ^Place decontamination point by water when possible.
Water can then be pumped from source and used directly in
washing down vehicles. Container can be filled with decon-
taminant and used by turning a valve.
64
DECONIAMINATION OP VEHICLES
15
65
15
ARMORED FORCE FIELD MANUAL
b. Procedure. — (1) The enemy may use persistent chemi-
cals in large quantities either by air attack or by persistent
chemical mines which will be exploded when vehicles cross
a barrier. It is possible to have the major part of a unit
the size of a division contaminated at one time. If the tacti-
cal situation permits, it will be highly desirable to decontami-
nate the entire unit before proceeding.
(2) Mass decontamination is a problem of organization of
a major portion or all of a large unit for decontamination.
(a) Instructions are given that subordinate units will
move out of the contaminated area.
(b) All echelons of decontamination are employed as
heretofore prescribed.
(c) Decontamination areas are usually prescribed for
subordinate units.
(d) Power-driven decontaminators are moved forward for
use by units most heavily contaminated.
(e) When necessary, redistribution of decontamination
equipment is coordinated by higher unit commanders.
(/) Steps are taken to refill with decontaminants at the
earliest opportunity.
(g) Units are ordered to move from decontaminatioii areas
as soon as decontamination is completed.
66
Appendix I
QtTESTIONS AND ANSWERS
1. Q. What two advantages do units of the Armored Force
have in meeting a persistent chemical attack?
A. (1) Protection offered by the vehicle.
(2) Ability of armored units to carry antichemical
equipment in vehicles immediately available to
the personnel.
2. Q. What are the characteristics of persistent chemicals?
A. They are heavy, oily liquids which will adhere to
vehicle surfaces for varying lengths of time and
may be absorbed by grease on the vehicle. If they
come in contact with the skin they cause burns
which are very slow in healing. These liquids give
off vapors which will burn the eyes and lungs if the
gas mask is not worn.
3. Q. What surfaces readily absorb these chemicals, and
what surfaces only moderately?
A. Oil-painted surfaces and grease readily absorb liquid
persistent chemicals. Lacquered surfaces only
moderately absorb them. Rubber absorbs them
slowly.
4. Q. In what four ways may the effect of these chemicals
be neutralized?
A. (1) By decontaminating chemicals.
(2) By heat, that is, by burning off the surface.
(3) By dissolving in fuel oil and wiping off surface.
(4) By scouring bright or lacquered metal surfaces
with mud.
5. Q. In what four ways will contamination of armored
vehicles occur?
A. (1) From passing over contaminated terrain covered
by underbrush, high grass, mud, or dust.
(2) From airplane spray.
(3) Prom the splash of a direct hit or near miss by
gas shells, gas bombs, or explosion of gas-filled
land mines.
(4) From standing in an atmosphere with a heavy
concentration of chemical in vapor form.
67
ARMORED FORCE FIELD MANUAL
6. Q. What protective eauipment must be carried by per-
sonnel in order to be in a constant state of readi-
ness to perform first eclielon decontamination?
A. (1) Gas mask.
(2) Impregnated clothing including cotton gloves.
(3) Cellophane covers.
7. Q. When will impregnated clothing be provided for
Armored Force soldiers?
A. When the unit is alerted at its home station for
movement to a theater of operations, in the staging
area, or as soon as the vmit arrives in the theater
of operations.
8. Q. Can troops impregnate their own clothing?
A. Yes, by field methods as outlined in Training Circular
No. 4, W. D., January 21, 1942.
9. Q. Cafi impregnated clothing be worn continually in
the field?
A. Yes, it is almost as comfortable as untreated clothing.
10. Q. Normally, how many times can impregnated clothing
be laundered before it will be necessary to reim-
pregnate it?
A. Three to five times.
11. Q. What is used in treating leather shoes and leather
equipment to make it resistant to gas?
A. Shoe impregnite. Pull instructions for applying
appear on the container.
12. Q. Will top covers, seat covers, etc., be impregnated?
A. Fabric equipment of this kind which is not made of
gas-impervious material will be impregnated by the
same method used for clothing or, in the case of
larger items or items which cannot be removed from
vehicles, by applying the impregnite solution with a
brush or broom.
13. Q. Can impregnated top covers of open vehicles be used
under field conditions In protection against chemical
attack?
A. Yes. In the theater of operations impregnated top
covers of open vehicles will be unrolled and spread
inside the vehicle to cover extra ammunition,
rations, personal equipment, etc.
68
DECONTAMINATION OF VEHICLES
14. Q. Why is it necessary to treat ordinary fabric and leather
to make such material gasproof?
A. The time required to decontaminate untreated mate-
rial is too great during active operations.
15. Q. What is meant by first echelon decontamination?
A. This refers to the decontamination performed by the
crew of the vehicle with the equipment normally
carried in the vehicle.
16. Q. Who orders and supervises this work?
A. The vehicle commander.
17. Q. In first echelon decontamination do we try to decon-
taminate the entire vehicle?
A. No. Limited time and limited decontaminating mate-
rials carried in the vehicle make it impossible. We
decontaminate only the weapons, equipment, and
parts of the vehicle necessary to enable us to con-
tinue in action with reasonable safety from effects
of chemicals.
18. Q. What is the final operation in first echelon decon-
tamination?
A. Wiping off all weapons, instruments, and machined
surfaces which have been treated with DANC, using
oily waste, and then wiping off vision slits and
periscopes with a dry cloth.
19. Q. Approximately how long should it take to perform
first echelon decontamination?
A. A trained crew can perform first echelon decontami-
nation in 3 minutes or less.
20. Q. Who performs second echelon decontamination?
A. Second echelon decontamination is performed by the
crew of the vehicle and specially trained men in
company headquarters with the equipment carried
by the company.
21. Q. Who orders and supervises second echelon decontami-
nation?
A. The company commander.
22. Q. To what extent can a vehicle be made safe in second
echelon decontamination?
A. The vehicle can be made safe for the crew or for
maintenance personnel to work on it without in-
dividual protective equipment, provided 3 hours'
69
ARMORED FORCE FIELD MANUAL
reaction time is allowed when chloride of lime has
been used.
23. Q. What decontamination equipment and material is
carried by the company for second echelon decon-
tamination?
A. Three or six decons-3, appropriate fillings of DANC,
and 200 pounds of chloride of lime are carried by
the company. This is sufficient to decontaminate
thoroughly about one-half the vehicles in the com-
pany, or if the contamination is light, is sufflcient
to decontaminate all vehicles.
24. Q. Who performs third echelon decontamination? How
and where?
A. The driver and assistant of the decon-PD and the
crews of the disabled vehicles decontaminate at
decontamination points in maintenance areas or
parks, using the decon-PD and hand-operated
equipment.
25. Q. Who orders and supervises this work?
A. The maintenance unit commander.
26. Q. What may have to be done when units meet large
scale airplane spray attacks?
A. Additional materials may have to be distributed and
the entire unit organized for mass decontamination.
Methods employed are the same as in first, second,
and third echelon decontamination.
27. Q. Who orders and supervises such decontamination?
A. Regimental or higher commanders.
28. Q. What filling is used in the decon-1%?
A. Agent, decontaminating, noncorrosive (DANC) .
29. Q. Does DANC in a filled apparatus remain effective
indefinitely?
A. No. If the apparatus is not used in 6 months it must
be emptied and refilled with fresh DANC.
30. Q. What important maintenance should be performed
frequently on the 11/2 -quart apparatus?
A. The discharge opening should be cleaned of any de-
posit or dirt, using a piece of wire or a knife blade.
31. Q. What decontaminating agent may be used in the
deoon-3?
A. DANC.
70
DECONTAMINATIOlJ OF VEHICLES
32. Q. How Is this apparatus operated and how is it cleaned?
A. It is operated by pumping the handle 20 to 25 strokes
to build up pressure before opening shut-off valve.
It is cleaned by unscrewing and cleaning nozzle by
hand.
33. Q. In what organizations are the apparatus, decontami-
nating, power-driven (decon-PD) found?
A. Maintenance companies.
34. Q. How is the decon-PD used?
A. It is used to clean the undercarriages of vehicles with
water and to decontaminate them with lime slurry.
35. Q. What is the tank capacity of the decon-PD, and what
pressure can it develop?
A. The tank capacity is 400 gallons. With a jet nozzle
it can throw water at a pressure of 600 pounds per
square inch, making it very effective for removing
mud from vehicles.
36. Q. What should be done with swabs, rags, and cleaning
brushes used in decontamination?
A. Throw swabs and rags away when the work is com-
pleted, for they will be badly contaminated. Brushes
should be decontarninated with DANC.
37. Q. What is the color change of paint, detector, when in
contact with drops of liquid persistent chemical?
A. The paint which is normally olive drab in color turns
red when affected by drops of liquid chemical.
38. Q. Does a coat of paint, detector, last indefinitely?
A. No; it should be removed every 14 days and the panel
repainted with a new coat of the paint, detector.
39. Q. What is the color change of the crayon detector when
marks are made on contaminated surfaces?
A. The crayon detector which normally resembles red
chalk changes to blue when a persistent agent is
present.
40. Q. What is the purpose of the kit, HS vapor detector?
A. To detect the presence of mustard in vapor form.
41. Q. What personnel carries the kit, HS vapor detector, and
how is it generally used?
A. All unit gas officers and certain gas noncommissioned
oflcers of the Armored Force carry the kit, HS vapor
detector. It is used to test air inside vehicles, to
71
ARMOEED FORCE FIELD MANUAL
check on the thoroughness of decontamination, and
to test air in wooded areas before occupation by
troops for bivouacs or maintenance parks.
42. Q. Does DANC alfect rubber and plastics?
A. It will decompose rubber and plastics if left In contact
for any length of time.
43. Q. Are the fumes of DANC dangerous?
A. Yes. They are toxic and .gas masks must be worn in
vehicles until the strong odor of DANC fumes has
disappeared.
44. Q. What chemicals will DANC neutralize?
A. All persistent chemicals.
45. Q. How is DANC shipped for storage and in what quan-
tities?
A. In a compartmented container which keeps the active
agent in dry powder form separate from the liquid
solvent. The amounts in each container are in
the proper proportions for a solution of 5 gallons
of DANC.
46. Q. Is it safe to use chloride of lime on fabrics, leather, or
bright metal surfaces?
A. No. It destroys fabric and leather items and corrodes
bright metal surfaces.
47. Q. Should dry chloride of lime be sprinkled on liquid
persistent chemicals?
A. Definitely not; a violent reaction will produce a flash
of flame and intense heat, driving off heavy con-
centrations of vapor.
48. Q. How should chloride of lime slurry be prepared?
A. Mix four parts of chloride of lime with three parts of
water, by volume. First make a paste with the lime
and a little of the water, and then stir in the re-
mainder of the water.
49. Q. What "rule of thumb" can be followed in preparing a
mud-lime slurry course?
A. Pour over the mud 4 pounds of chloride of lime per
lineal yard of the course.
50. Q. Compare the decontamination reaction time of DANC
and chloride of lime slurry.
A. DANC neutralizes , liquid persistent chemical almost
immediately upon contact. Chloride of lime de-
72
DECONTAMINATION OP VEHICLES
stroys persistent chemical effectively but rather
slowly.
51. Q. Why is water not as effective as DANC or chloride of
lime slurry for neutralizing Lewisite?
A. Water destroys Lewisite to the extent of eliminating
its toxic vapors, but it leaves a toxic coating in
powder form on the contaminated surface which
will produce burns.
52. Q. How are gasoline and Diesel fuel used as alternate
agents in decontamination?
A. Both these fuels may be used to dissolve liquid per-
sistent chemicals. Gasoline may also be used to
burn these vesicant chemicals off metal surfaces.
53. Q. Why is a supply of rags or waste necessary?
A. Rags or waste are used in wiping off weapons with the
decontaminant. When soaked in gasoline, rags
serve as torches for burning off contaminated ex-
terior metal surfaces.
54. Q. In burning off a vehicle, how large an area can be
burned off at one time?
A. Burn off only a small panel at a time, using a small
amount of gasoline.
55. Q. When it is perceived that open vehicles are to be sub-
jected to airplane chemical attack what is the first
action taken by the crews?
A. Crew members adjust cellophane covers.
56. Q. In above situation, when do crews of open vehicles
adjust gas masks?
A. As soon as cellophane covers are adjusted if time is
available; otherwise, they mask as soon as firing at
airplane has ceased.
57. Q. Should cellophane covers be decontaminated and kept
after they are contaminated from airplane chemical
attack?
A. No. They should be thrown over the side of the
vehicle after all the chemical has fallen, for they
are likely to be badly contaminated.
58. Q. What steps are Immediately taken by a tank crew
when a chemical attack is imminent?
A. If tank is open, close it.
73
ARMORED FORCE FIELD MANUAL
59. Q. A tank is moving along buttoned up and becomes
contaminated with persistent chemical. What is
the first thing the crew should do?
a: Adjust gas masks.
60. Q. When a vehicle encounters a chemical attack should
it be halted immediately and decontamination be
started?
A. No. Continue to move out of the contaminated area,
decontaminating the interior of the . vehicle as you
go. When out of the contaminated area and the
tactical situation permits, decontaminate the fore-
part of the vehicle.
61. Q. What steps are immediately taken by a tank crew
when the tank becomes contaminated?
A. (1) Adjust gas masks.
(2) Crew members inspect each other for drops of
liquid chemical.
(3) Liquid chemical is removed with rag or waste,
protective ointment is applied to the affected
spots, and any other first-aid measures indi-
cated are taken at once.
62. Q. What surfaces inside a tank are most likely to be
contaminated with liquid chemical?
A. (1) Surfaces around door in front of driver.
(2) Surfaces at bottom of the turret ring.
63. Q. What care must be taken of machined metal surfaces
after decontamination with DANC?
A. All weapons, instruments, and machined surfaces are
reoiled by wiping with oily waste or rags.
74
8EC0NTAMINATION OF VEHICLES
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75
ARMi.,RED FORCE FIELD MANUAL
l5
OA
Alcoholic sodium hy-
droxide (lye) spray; al-
coholic solution of sodi-
um sulphide. Boiling
with aqueous-alcoholic
solution of sodium thio-
sulphate (photogra-
phers' hypo). Alco-
holic-water solution of
ammonium thiocy-
anate.
Seldom necessary.
ONS
Hot solution of
sodium carbon-
ate and sodium
sulfite.
Same as for CN_.
ON
Strong, hot solution of
sodium carbonate
(washing soda) . 60 per-
cent sulfuric acid; oxi-
dizing agents in benzene
solution; hot alcoholic
solution of sodium thio-
sulphate (photogra-
phers' hypo) in water;
alcoholic ammonia TTot
acetic acid solution of
potassium iodide.
Hanging in open air is
usually sufficient, espe-
cially if air is moving
appreciably.
DA
Caustic soda
(lye) gaseous
chlorine.
None necessary^.
Adamsite DM
Gaseous chlo- '
rine; bleach
liquors.
None necessary, .
Common name
and symbol of
chemicals
Additional com-
pounds which
may be used
for decontami-
nants if avail- i
-a able.
OS
Decontamina-
tion of cloth-
ing.
DECONTAMINATION OF VEHICLES
NOTES
1. DANC and cWorifle of lime are the standard decontaminants issued
to Armored Force units.
2. Fuel oils may be used in an emergency wlien the standard decon-
taminants are not available as outlined under alternate methods.
3. In addition to the standard decontaminants there are many com-
pounds which are effective for that purpose. The most common ones are
tabulated in case they might be avaihible for local procurement or seizure
in an oversea theater in which there might be a temporary shortage in
standard decontaminants for issue.
4. Chemical officers and unit gas officers must he resourceful under all
circumstances. For example, in desert regions the surrounding earth
and sand are often strongly alkaline in reaction. In such cases a paste
of such earth or water that has been run through the sand may yield a
good decontaminant for those agents that can be destroyed by all?aiis. In
coal mining regions acid mine water is frequently available which might
be used where an acid is called for in decontamination. In industrial
operations waste liquors from paper mills, beet sugar factories, and
pickling liquors from steel mills can often be obtained that are acid or
alkaline, as well as liquors bearing relatively high percentages of free
chlorine, hydrogen sulphide, etc. None of these sources should be over-
looked when emergency decontamination is necessary.
5. Before using acUl or Ji/e consult chemical officer.
INDEX
Paragraph
Airplane spray - 5
Agents, chemical:
Characteristics *
Neutralization 4
Protection Irom 4
Agents, decontamination 8; App. II
Area, contaminated 6
Cleaner, high pressure 9
Clothing, Impregnation 6
Contaminated area 5
Contamination, types of 5
Crayon, vesicant detectors 10
DANC 8
Decontamination :
Equipment 9
First echelon 7, 12
Second echelon 7. 13
Third echelon 7, 14
Materials 8
Mass 7, 15
Means of 7
Gas shells and bombs 5
Gas vapor 5
Kit, HS vapor detectors 10
Paint, liquid vesicant detector 10
Preventive means 6
Testing equipment 10
Vapor, gas 5
o
79