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&lt;p&gt;For more about this collection, &lt;a href="/exhibits/speccoll/exhibits/show/alvin-l--young-collection-on-a"&gt;view the Agent Orange Exhibit.&lt;/a&gt;&lt;/p&gt;</text>
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&lt;p&gt;For more about this collection, &lt;a href="/exhibits/speccoll/exhibits/show/alvin-l--young-collection-on-a"&gt;view the Agent Orange Exhibit.&lt;/a&gt;&lt;/p&gt;</text>
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                    <text>00186
Fox, Roger P.
COTDOratB Author

Office of Air Force History, United States Air Force,
Washington, D.C.

RBPOrt/AftiClB TitlB Air ^ase Defense in the Republic of Vietnam 1961-1973

Journal/Book Titls
YW

1979

Month/Day

Number of Imaoes
pp.74-79 discuss herbicide defoliation, pp.214-217 describe agents orange, blue, and
white

Friday, January 05, 2001

Page 186 of 194

�AIR BASE DEFENSE
IN THE

REPUBLIC OF VIETNAM
1961-1973

Roger P. Fox

OFFICE OK AIR FOKCF HISTORY
L'NITFD STATf-S AiR I ORCfWASHINGTON. DC., 1979

�explosives devices dictated that this
complex he kept free of concealing
vegetation. Ignoring the French experience, the USAF discovered anew the
problems associated with defoliation
of the perimeter harrier system. 46
Rarely if ever charted, the minefields of the perimeter harrier prohihited use of mamml labor to cut and
remove the vegetation. The mines,
fencing, and wiring prevented mowing or v.Tiipir)g by rruvruni/i.'il equipment (turning w.is un-.jtist'.iciorj on
several counts. Vegetation was highlv
fire resistant, particularly during the
rainy season when growth was most
rapid. Ii ignited slowly, even if
sprayed with a flammable such as
contaminated jet fuel. Because fire
hardly ever consumed the vegetation,
the residue went on obscuring ihe barrier syMk-m and offering cover to pcnctrators. Burning also detonated or
destroyed mines and flares within the
complex.
Next in importance was defoliation of the base interior. Here too, the
ideal was to clear the ground cover
that concealed pene'raiors and reduced
surveillance by defense forces. For
example, the defense vegetation ne-

gated sentry dog detection—the base's
most reliable alarm. And the exertion
in plowing through this thicket sapped
dog and handler. Because the interior
was without the perimeter's hazards
or obstructions, it seemed that the
clearing methods mentioned earlier
could be given full play. In practice
this was not the case. Safety factors
forbade burning in or near fuel and
munitions storage areas. The immense
labor entailed in clearing a si/able
area m .1 rcutonaMc lime ciiruili'tl
manual culling C u t t i n g by hanJ
nonetheless left the root .lyatcm intact,
and so was well-suited to Cam Kanh
Bav's wry unstable soil Flsev.-h.ere.
however, an undisturbed root system
meant rapid regrowth of vegetation.
F.ven though scraping served well in
the base interior, ihe conventional
USAF civil engineer squadron usually
idCKcu IMC mx-dcii iiKX(iaru/t.'ii equipment In light of these facts, ihe
answer to vegetation control in the
interior as on the perimeter appeared
to be herbicides.

By the time the Air Force turned
to herbicides for base vegetation control, they were in full-scale military
use in support of other ground operations The dispensing of defoliants
centered on foliage along thorough
fares to deny the enemy ambush cover.
Spraying also focused over VC/NVA
camps and assembly areas, as well as
over crops intended for feeding the
foe. The acreage treated with agents
from the 1,000-gallon tanks of USAF
UC-12.1 (Ranch Hand) aircraft rose
from 17.119 in I««i2 to 608,106 in
1966."'
None of these herbicides was believed to endanger humans or animals.
All had been widely used in the United
Slates for more than 20 years on foods
and other crops, rangcland, and forests. None persisted in the soil and
periodic respraying was required to
kill regrowth. All were liquids. Those
dispensed in RVN were designated
Orange, White, and Blue. Appendix 5
gives general data on their composition, application, effect, and safety
precautions.

The use of these, herbicides was.
a GVN program supported by the
United States. The U.S. Ambassador
and COMUSMACV acted jointly on
GVN requests for herbicide operations on the basis of policy formed
by State and Defense Departments
and approved by the President.-""
Senior U.S. Army advisors at ARVN
corps and division level were delegated authority to approve requests
in which dispersal of the herbicides
was limited to hand or ground-based
power-spra&gt; methods.
A herhicidal defoliation request
from a USAF air base was prepared
and documented by the base civil
engineer, using a set checklist. (See
page 77.) It was then processed
through U.S. military channels to the
senior U.S. Army headquarters in the
corps tactical zone. If approved there,
it wiis sent on to ihe ARVN commanding general of the same CTZ for
military approval and political clearance. It was at this point that delay
most frequently occurred, due to opposition from the district and/or
province chief. These officials were
influenced by such things as superstition, concern for local crop damage, and possible propaganda value to
the VC- NVA. Final action on requests
for ground-delivered herbicides was
taken at this level. If aerial delivery
was desired, the request could only
be approved at USMACV/JCS level.

A C-123 sprays defoliation chemicals
over South Vietnamese jungles

�Technical factors also entered
into the dispensing of herbicides. Dry
weather was essential, because rain
quickly washed chemicals from ilie
target vegetation to nearby crops und
other desirable growth. Ideally, spraying was di&gt;ne between dawn and
1000, at ambient temperatures under
10'; C (8fi r I-"), and in calm or very
low wind conditions to minimize drift.
Storage and mixing points had to be
kept to a minimum, isolated from cultivated areas I-'mpty herbicide drums
required close control to avoid aa-i
dental contamination.*'
Approval and execution of herhicidal defoliation projects were lime-

consuming and uncertain. In February
1968 Phan Rang requested defoliation
of a 200-meter strip both inside and
outside the perimeter, around the entire circumference of the base. The
approving authority reduced the scope
of the project to one-half the perimeter. In addition, problems in obtaining herbicide and other obstacles delayed completion of the project for
1 year.52
t- ',egeiaiu&gt;n at Tan Son
Shot and Uicn lloa hindered the base
defenders throughout the 196S Tet
attacks/' 1 ' 1 At Bien Hoa the approval
piocess for aerial defoliation was
termed "hopelessly complicated," one

Checklist for Defoliation Requests
1 . Overlays or annotated photographs depicting the exact area.
a.
b.
c.
d.
e.

Area — province and district.
UTM cooidinatcs.
length and width.
Number of hectares,
Type of vegetation.

a. Objectives and military worth.
b. .Summary of incidents.
Psychological warfare annex (prepared hy sector):
a. Leaflets.
b. Loudspeaker texts.
'v. Civil affair-* annex (prepared hy sector):
a. No crops within 1 kilometer.
b. Contingency plan to piovide food or money to families whose crops
are accidentally damaged by rho defoliation operation

6. Certification by province chiefa. Province chief approval.
t). Indemnification w i l l be made b&gt; the Republic ot Vietnam lor accidental damage to crops.
SOl.'R&lt; f - : I.it&gt; of Cong Rprt, it Aim &lt;&gt;'•&gt;. 10 'lit.1- HIHIM.- SuKoiiiriultec on Science anil
AilKMi.iulJL'h, 9!sr C iing, ! •&gt;! ss::&gt;\, A 1 1; l.nt't &lt;i:nul Aiw,\rn&lt;nl ••/ th* Viet-

77

76

�that might take two or more months.
Plant growth meanwhile continued
unabated. F.ven when authorized, a
project was apt to l&gt;e fettered with
restrictions. Thus aerial delivery of
Orange was denied at Bien Hoa, and
only parts of its perimeter were approved (or chemical defoliation. Accordingly, because Blue and White
were not suited to local conditions.
Orange had to be dispensed from a
tank truck by a power spray that did
not reach beyond the second fences.
Local terrain made it impossible to go
outside the third and fourth fence and
spray inward. 5 *
As noted earlier, Binh Thuy faced
the most extreme defoliation problem.
Here the one herbicide approved for
use was Blue, which killed only those
portions of plants with which it came
in contact. With the root systems left
intact, regrowth was rapid. In 1 month,
2,420 gallons of Blui: valued at
$22,000 were sprayed over limited
areas of the interior and a narrow
z.one around the perimeter of the 550acre installation without making any
significant inroads against the. teeming
vegetation."
Herbicides for air base defense
seldom if ever improved the horizontal
view at installations by the desired
40 to 60 percent.*• Defoliation needs
of the 10 primary bases were specific,
permanent, and known in advance.
Still no ongoing long-term program to
satisfy them was ever set up. Instead
the job was done piecemeal, with each
base handling defoliation requests.
Despite administrative and technical
controls, chemical agents remained the
single sure way to control vegetation
in places where other means could
not—notably in the critical perimeter
complexes. As the war drew to a close,
however, curbs on the use of herbicides
grew more and more rigid. The last
herbicide mission by fixed-wing aircraft was flown on 7 January 1971.
78

On \ May, a presidential directive
ended all U.S. herbicide operations.57
In the ensuing months, mines killed
eight and injured seven Army personnel who were trying to clear vegetation by band from wire entanglements and (kids of fire." With the
Ambassador's full backing, COMUSMACV urged Washington to alter at
once the ban on chemical herbicides
because immediate defoliation was
"essential to security of ba«.es." s°
On IS August the President petmilted the resumption of chemical
defoliation until I December 1971.
He authorized the use of Blue and
White but not Orange:. Approved
herbicide operations were restricted to
the perimeters of firehoses and installations, with delivery limited to
solely helicopter or ground-based
spraying equipment, under ih&lt;* same
regulations applied in the United
Slates."0 As the expiration date for
this authority neared, COMUSMACV
asked for an extension. On 26 November 197! the President authorized
continued use of herbicides and set
no termination date. At the same
time, he stipulated that 11 S defoliation assistance to the Government of
Vietnam be confined to "base and
installation perimeter operations and
limited operations for important lines
of communications." This policy prevailed until the last U.S. forces departed RvN in 1V73." 1
No defoliant method tried for air
base defense purposes in South Vietnam proved to be at once efficient,
economical, and politically acceptable.
The practical value of herbicides was
much impaired by technical, administrative, and political constraints, For
chiefly technical reasons, the same
could be said for techniques such as
burning and scraping For the United
States— as it had for F-'rance-—vegetation remained a major unresolved
problem.

V. USAF GROUND DEFENSE FORCES

The enormous mass of non-combatant personnel who look
after the very few heroic pilots, who alone in ordinary
circumstances do all the fighting, is an inherent difficulty
in the organization of the air force. Here is the chance for
this great mass to add a fiehting quality to the necessary
services they perform. F.vcry airfield should be a stronghold of fighting air-groundrnen, and not the abode of uniformed civilians in the prime of life protected by detachments of soldiers.
Sir Winston Churchill, 194!.

By lair. 196' it U:C alike Ccitdiii

that U.S. ground combat forces would
lake part in offensive operations, and
that the Air Force would be expected
to protect its own installations. The
USAF reaction to this unwelcome task
was alien 10 the U.S. armed forces.3
It was to ship the basic means of air
base defense to South Vietnam man
by man and item by item. Then in the
combat zone the Air Force assembled,
organized, and trained these troops
More than 8 months passed before
this process began to turn out forces
that showed elementary skill in executing their unit mission.-' Security
police squadrons were formed in this
manner at the 10 major bases in RVN.
These units became the focal point of
USAF ground defense during the entiie war.

Tactical versus Nuniaclurai
Organization

The governing USAF directives*
wert silent on how to organize and
employ security police in a hot war.
Hence USAF ground defense forces
in RVN were structured to cope with
CONUS contingencies in a cold war.
A security police squadron in RVN
* Air Force Manual ( A I M ) 207-1.
Doctrine, and Requirements for Security
of Air f-orce Weapons Systems, 10 June
L%4 &lt;Mir*r\e.letl by M-M ?07-1. 10 Urn
68. and in turn by AF-M 207-1, 10 Apr
7 0 ) . AF-M 205-1 Air Police Security
Operation*. !5 February I0!)!? l.-epla.ed
by AF-M 2(17-7, Handbook for Security
F'oices. IS J u l h6, which w-'a
by A I - M ?i&gt;7 ?. 1 5 .Suiif f&gt; ! &gt;&gt;

79

�APPENDIX 5
Herbicides Employed in Air Base Defense Operations*
General
Antiplant agents are chemical agents which possess a high offensive
potential for destroying or seriously limiting the production of food and defoliating vegetation These compounds include herbicides that kill or inhibit the
growth of plants; plant growth regulators that either regulate or inhibit plant
growth, sometimes causing plant death; desiccants that dry up plant foliage;
and soil sterilants that prevent or inhibit the growth of vegetation by action
with the soil. Military applications for antiplant agents are based on denying
ihe enemy food and concealment,
Antiplant agents in use
a. ORANGE.
(1) Description Agent ORANGE is the Standard A agent. It is composed of a 50:50 mixture of the ri-butyl esters of 2,4-D and 2,4,5-T (app D
and Cl. TM 3-215). ORANGE appears as a dark-brown oily liquid which
is insoluble in water but miscible in oils such as diesel fuel. It weighs about
10.75 pounds per gallon and becomes quite viscous as the temperature drops,
solidifying at 45° F. It is noaeorrosive, of low volatility, and nonexplc.sive, but
deteriorates rubber,
(2) Rate of application. The recommended rate of application of
ORANGE is 3 gallons per acre. This may vary depending on the type of vegetation. In some situations better coverage may be obtained by diluting
ORANGE with diesel fuel oil, which results in a less viscous solution that
is dispersed in smaller droplets. Dilution may also be required when using
dispersion equipment which does not permit the flow rate to be conveniently
adjusted to 3 gallons per acre,
(3) Effect on foliage. ORANGE penetrates the waxy covering of
leaves and is absorbed into the plant system. It affects the growing points of
the plant resulting in its death Rains occurring within the first hour after
spraying will not reduce the effectiveness of ORANGE to the extent that they
reduce the effectiveness of aqueous solutions. Broadlcaf plants are highly
susceptible to ORANGE. Some grasses can be controlled but require a much
higher dose rate than broadleaf plants. Susceptible plants exhibit varying
degrees of susceptibility to ORANGE. Death of a given plant may occur within
a week or less, or may require up to several months depending on the plant's
age, stage of growth, susceptibility, and the dose rate.
(4) Safety precautions and decontamination. ORANGE is relatively
nontoxic to man or animals. No injuries have been reported lo personnel
exposed to aircraft spray. Personnel subject to splashes from handling the
agent need not be alarmed, but should shower and change clothes at a convenient opportunity, ORANGE is noncorrosive to metals but will remove
* Lib of Cong Rpt, 8 Aog 69, lo ihe House Subcommittee OR Science, Research,
and Development of the Committee on Science and Astronautics, 91st Cong, 1st sen,

A Technological Assessment of the Vietnam Defoliant Matter: 4 Cast History,
pp 67-73.

214

aircraft paint and walkway coatings. Contaminated aircraft should be washed
with soapy water to remove the agent. Rubber hoses and other rubber parts
of transfer and dissemination equipment will deteriorate and require replacement, since ORANGE softens rubber.
2. BLUE (Phytar 560G)
(1) Description. Agent BLUE is an aqueous solution containing about
3 pounds per gallon of the sodium salt of cacodylic acid, the proper amount
of surfactant (a substance which increas.es the effectiveness of the solution),
and a neutralizer to prevent corrosion of metal spray apparatus. BLUE is 'he
agent normally used for crop destruction.
(2) Rate of application. BLUE may be sprayed as received from
the manufacturer without dilution, if desired The recommended application
rate fi'T crop destruction )•&gt; about I to .2 gallons per acre. However, much
higher use rates of BLl 'E arc required to kill tall grasses, such as elephant
grass or sugarcane, because of the large masses of vegetation For hand-spray
operations, two gallons of RI UF diluted with water to make 50 gallons will
give a solution that can be dispersed by hand at a rate equivalent to approximately 1 to 3 gallons of pure agent per acre.

Air Force C~123s spray defoliation chemicals over the A Shau valley

�A Vietnamese soldier
sprays fuel oil on
dense foliage to determine the effectiveness of defoliation by fire. This
failed because the
fire would not keep
burning

(3) Effective on foliage. Enough BLUE applied to any kind of foliage
will cause it to dry and shrivel, but the agent is more effective against grassy
plants than broailicaf varieties. Best results are obtained when the plant is
thoroughly covered, since the agent kills by absorption of moisture from the
leaves. The plants will die within 2 to 4 days or less and can then he burned
if permitted to dry sufficiently. BLUE in low dose rates can also prevent grain
formation in rice without any apparent external effect. The plant develops
normally but does not yield a crop. Spray rates higher than about one-half
gallon per acre usually kill the crop. Although BLUE can produce relatively
rapid defoliation, regrowth may occur again in about 30 da&gt;s. Repeated
spraying is necessary to provide a high degree of continuous plant kill.
(4) Safety precautions and decontamination. Normal sanitary precautions should be followed when handling BLUE. Although it contains a
form of arsenic, BLUE is relatively nontoxic. It should not be taken internally,
however. Any material that gets on the hands, face, or other parts of the body
should be washed off at the first opportunity. Clothes that become wet with a
solution of BLUE should be changed. Aircraft used for spraying this solution
should be washed well afterward. When WHITE is added to BLUE, a precipitate forms that will clog the system. If the same spray apparatus is to be used
for spraying .agents WHITE and BLUE, the system must be flushed to assure
. that all residue of the previous agent is removed.

Effects of aerial
defoliation

c. WHITE (Tordon 101).
(1) Description, The active ingredients of agent WHITE are 20 percent picloram and 80 percent isopropylarnine salt of 2,4-1). Active ingredients
constitute about 25 percent of the solution. A surfactant is also present. WHITE
is soluble in water, noncorrosive, nonflammable, nonvolatile, immiscible in
oils, and more viscous than ORANGE at the same temperature.
(2) Rate of application. WHITE usually should be applied at a rate
of 3 to 5 gallons per acre on broadleaf vegetation. However, the rate may
vary depending on the type of flora. Quantities required to control jungle
vegetation may vary from 5 to 12 gallons per acre. This quantity exceeds the
spray capability of most aircraft spray systems for a single pass. It is usually
unfeasible in large-scale military operations to apply such large volumes. For
ground-based spray operations, however, high volumes are necessary. Handspray operations cannot evenly cover a whole acre with only 3 gallons of
solution. Three gallons of WHITE diluted to a 30-gallon solution can be more
easily sprayed over an area of one acre. 'The manufacturer recommends diluting
WHITE with sufficient water to make a 10-gallon solution for each gallon
of agent.
(3) Effect on foliage. WHITE kills foliage in the same manner as
ORANGE, since 80 percent of the active ingredient is 2,4-D. PICLORAM is
more effective than 2,4-D, but acts slower. WHITE is effective on many plant
species, and equal to or more effective than ORANGE on the more woody
species. The material must he absorbed through the leaves. The water solution
does not penetrate the waxy covering of leaves as well as oily mixtures, and
is more easily washed off by rain.
(4) Safety precautions and decontamination. WHITE exhibits a low
hazard from accidental ingestion. However, it may cause some irritation if
splashed into the eyes. .Should eye contact occur, flush with plenty of water.
Splashes on the skin should be thoroughly washed with soap and water at the
first opportunity. Contaminated clothing should be washed before reuse. When
WHITE is used in the mam*- rqnipment as BLUE, all of the WHITE should
bo removed bet'oie using BLUE. The two agents produce a white precipitate
that will clog spray systems.

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&lt;p&gt;For more about this collection, &lt;a href="/exhibits/speccoll/exhibits/show/alvin-l--young-collection-on-a"&gt;view the Agent Orange Exhibit.&lt;/a&gt;&lt;/p&gt;</text>
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Author
Corporate Author
Roport/Artlck) TltlO Appendix 1: Characteristics of Herbicides Used in
Southeast Asia

Journal/Book Title
Year

000

°

Month/Day
Color

n

Number of Images

7

DeSCrlptOU NOteS

Handwritten note at top says "14 May Court
Proceedings"

Monday, January 22, 2001

Page 320 of 341

�APPENDIX 1
Characteristics of Herbicides Used in Southeast A^sia
The chemicals present in the defoliant mixes employed by the United
States Air Force in Southeast Asia were developed originally to control
weeds, that is, plants growing in places where nan does not v^ant them to be.
Veeds present serious problems to agriculture because they compete with
crops for available sunlight, moisture, and nutrients.

For millenia the

only v:eapons farmers had to use against woods were mechanical, such as the
hoe and the plow.

In 1896 the modern use of chemicals to control weeds

began with the work 'of a French scientist named Honnet.

He observed th?t

the seedlings of wild mustard, a common weed in Uestern Europe, died when
sprayed with a fungicide developed for use on "rape vines.

Bonnet later

found that copper sulfate, a component of the fungicide, would selectively
kill the wild mustard growing in a cereal crop. Other research showed that
chemical compounds such as sodium nitrate, ferrous sulfate, and dilute
sulfuric ncid also acted as selective herbicides against broad-leafed weeds
in fields o* cereal plants with narrow, upri~ht leaves.

These compounds

were dossicants and worked by extracting water from plant tissues.

Their

selectivity depended on the broad, level surfaces of the weeds collecting
more of the chemical rpray or dust than cereal leaves.

The performance of

these chemicals, except for dilute sulfuric acid, war, however, erratic.
fyr.th^tic nlant hormones or plant r;rcr.:th regulators, precursors
of the primary herbicides used in Vietnam, vere difrco'-'omd in the l°30s.
The first synthetic plant horr.one herbicides were ruite e:-:nensive and

&lt;

�therefore impractical as agricultural chemicals. A search undertaken to
find less expensive and more active artificial plant hormones in 19^2 identified
2,lj-dichloropheno2&lt;yacetic acid (2,li-D) as one of the most promising.
Field trials during the World t.'ar II years proved that a related compound,
2,lj,3&gt;-trichlorophenoxyacetic acid (2,h,5&gt;-T) could also be used as a
selective herbicide. These\two compounds later became important agricultural
chemicals, and they were the primary components of several of the herbicides
employed in the Hanch Hand procram.

T)

Geoffrey 5. Blacknan, The Effects of Herbicides in fouth Vietnam,
Part B, Working Papers; An Historicpl Survey; olM&gt;he; peyfljqojnpnt jxf
Herbicide_s (Washington. B.C.: National Academy of Sciences, February

Three terms used throughout this study need to be defined:

"herbicide,"

"defoliant," and "dessicsnt." A herbicide is a chemical which will kill
or injure a plant when applied to air, soil, water, or the plant itself.

9
\

The defining characteristic of defoliants is that they cause the leaves
of a plant to fall prematurely, although the plant may or may not die as
a result• A dessicmt is a diving ?,:~rent which causes a plant's tissues
to lose their moisture, thereby killin-' or dana^ing the nlant.
a dessic?nt may or may not result in subseau^nt dofoli"tion.
chemical r.ay fall into one or nore of these categories.

The use of
Thus, a given

?-TO of the tnrms,

"herbicide" nnd "defoliant" are used practically interchangeably in
discursions nbout the Ranch Hrnd program, but ronoti-nes tlio riiffcrences in
moaning may be important.

.

�Rprfc, Review and Evaluation of ARPA "Defoliation" Program in
South Vietnam ffi&amp;J, p 5.

None of the herbicides used in Southeast Asia were of a new or
experimental nature.

They had all been used .for several years in commercial

agriculture both in the United States and in other countries.

By way of

illustration, in 1961, the year before the Ttanch Hand program be,e;an, about
IjO million acres plus hundreds of thousands of miles of roadsides, railroads,
and utility rights of way were treated with phenosy herbicides in the United
States.

Of this total, wore than ten million acres, an area about one-fourth

tho size of South Vietnam, received aerial spray applications. The
»
herbicides used in Southeast Asia were familiar agricultural chemicals,
and aerial spraying of them was common*

Hprt, Review and Evaluation of ARPA "Defoliation" Program in
South Vietnam [&amp;)®J9 p ii.

ci

�The compounds 2,h~D and 2,)i,i&gt;-T are chlorinated phenoxy acids, and
herbicides contain them in the acid form, as salts, and as esters, Wiich
form is chosen for a specific application depends on desired characteristics such
as solubility, volatility, and melting point.

The persistence of 2,lt-D and
V

2,1;,5-T in soil is limited to only a., few weeks^ and. high dosages are

.

••*-&gt; '£{'&lt;•

necessary to pibduce 1(^=::^ir[^--!^^^-^^
, con si' (goncem n^s developea over the potential danger from 2,3,7,0-tetrachlorodibenzopara-dioxin, corimonly known as dioxin, an impurity present in 2,l4,5&gt;-T.
Fnenoxy herbicides are growth regulators which have extensive
effects on the structure of plants.

Their a c t i o n is generally r^pid,

and the fact that thej ray spread throughout a p l a n t allows them to
a f f e c t alr.cst a l l of its biological a c t i v i t i e s .

A plant's reaction

to 2,'-(-D or 2,'J,5-T jr. ay result in an a V n o r r a l p r o d u c t i o n of buos or
roots and the excessive giowth of tissues.

In lesser concentrations,

the g r o w t h in tissues s u r r o u n d i n g a p l a n t ' s v a s c u l a r system and the
resultant r e s t r i c t i o n in the flow of n u t r i e n t s r a y cause a slow death
of the plant.

In ;-:hort f these two hc-rl ic'' jes s t i m u l a t e a

p r o l i f e r a t i o n of t i s K u

C

)

^ ^The Coriinitlee on tte Kffccts of J:erMci:'.es in Vir.-tnrin,
j i a l Fit" re arch C o u n c i l , Tne J^I^cts _pf j:'/_r": i c i d - J c in T o u t h V i ' / i r, •-.•-.:
Tari ^, ( W n - h i n r t o n , D . C . : Natfonal Acricur.y of Pcic-.-jccr;", "lV7'0 •
pp. 11-21, 31; Floyd K. A:.;hton and Alclon S. Crafts, Kone of A c t i o n of
J i c r b i c i _ d r n , (New York: John W i l e y &amp; Tons, 1973)i PP- '---?'°-S.

P i c l o ; ,iii.

r:H

A t?iird r c : ' j " .r.-J i:.«-'.-i ' n '.:.'-• * :.'.-:h

r;'. r": ici':e fo: r •:'!::1 ( •„ '.r;

�was p i c l o r a r o .

Sold commercially as Tordon, it has the formal chemical

name of '4--aifiino-3f5»6-"';richloropicolinic acid.
is a white powder with a smell like chlorine.

In its pure state, it
Piclorarc's toxicity to

man is thought to "be lower than that of 2,'4-D or 2,4,5-T.

]

Like the

phenoxy herbicides, picloran. regulates plant growth, "but the precise
r.echanisirs involved are not known.

It is an extremely mobile compound,

being readily a"; i~ :&gt;rV:d by both the l e a v e s and roots and transported
throughout the plant's t i s s u e s .
against woody plants.

Its "ability enhances its e f f e c t i v e n e s s

Sore of the effects of picloram ere to .stunt

leaves and cause terr.inal g r o w t h to stop.

Also, tissues a l o n g the

stem proliferate, and the stem tends to lend and split.
d e t e r i o r a t e , and th-3 pl-i.nt r-oon n i o s .

Roots ir.ay

Cor pa red to 2 , V - D , p i c l o r a m

is i;iuch i.ore r o b i l e , "hotter able to i ; ; n e t r a t e roots, and nore toxic to
plants.

One i m p o r t a n t d i f f e r e n c e b e t w e e n picloram and the phonoxy

h c - r b i c i d o s is that it is j - ^ r s i s t c n t in .soils whereas the ]Viorjoxy
coi:ipounds g e n e r a l l y are not.

Its j-:-r:. : istonce a l l o w s H to bo i;r.ed as

a general noil s t o r i l a n t xuider sone conditions.
^ ^Tne Cor:.:'dttee on the h f f a c t s of Herbicides in V i e t n a m , Tn^
Kffpcts_o_f I-:trbi_ci(:c-s__in n_outh_Vj ctnnr:;: rart__A, p. JI-15; A.'.hton and
CrafCs~, pp." '4f3-';i8V

C a c r . i y l i c Acid
0

II

CH 3 - -As - -OH

CM

3

•

�Cacodylic a c i d , formally known as hydroxydiiriethylarsine oxide
and sold as Fnytar, is not a plant- growth regulator like the other
three herbicides.

Rather, it functions as an "uncoupler," keeping

v

the plant from using the products of its metabolism for growth and
tissue maintenance.

It is thought that the effectiveness of cacoaylic

a c i d , like other arsenic, compounds 4Bqp85lpyused as herbicides,
derives from its ability to substitute arsenic for phosphorus in biocheMcal reactions.

Its effects on a plant are to stop g r o w t h , r-i.i^ck

re.T-brane integrity, and cause drying, yellowing, a n d , e v e n t u a l l y , death.
Because drying i s - i t s primary observable effect, cacodylic acid is
often labeled as a der-sicant.

It is a c o n t a c t herbicide and is rapidly

rendered i n e f f e c t i v e in soil.

Cacodylic acid, an.

"organic compound, can replace i n o r g a n i c forms of arsenic such ;is
sodium arsenite and sodium arsenate in a herbicide role.

These

inorganic arsenic cor.'pcn.-i.is are very toxic to both nan .'&gt;nd anir.ils and
can cause accidental fatalities.

£aee£fitc acid itself is slightly

toxic to humanSj*&gt;
a probable lethal oral dose of one ounce or r.-orc, alUjongh it has
l i t t l e or no t o x i c i t y whcr. a p p l i e d to the skin.
^

'-A:;hton rmd C r a f t s , pp. l'47-l60.
Cor.binations of ty.L-se four hc-rbicidc.-.-: xc-re 'jiod to f c r r u l a t e

the d i f f e r e n t color-ci-ic-d a r o n t r i.-r.c-d in the r.-i/ch Hai.d o j o r a l i c n :in
Sc.-.ithcist Ar-.ia.

Table 1 lists the composition of these m

�TABLE 1

Major Herbicide Mixtures Used in Vietnam^
Military Color Code or Trade Name*
Pink

Composition (active ingredientsi
£ n-bufcyl ester of 2,L.5-T
£ isobutyl ester of 2,[),5-T

Green

100£ n-butyl ester of 2,h,$-T

Pink-Green mixture

80£ n-butyl ester of 2,li,5l-T
20£ isobutyl ester of 2,1/,5-T

Binoxol

!r&gt;0£ butyoxyethanol ester
of 2,lj-D
$0% butyoxyethanol ester
of 2,h,5-T

Trinoxol

100$ butyoxyethanol oster
of 2,b,5-T
»
501? n-butyl ester of 2,1,-D
305 n-butyl ester of 2,
2Q% isobutyl ester of 2

Purple

Blue

100^ sodium salt of cacocfyrlic
ncid

Orange

$Q% n-butyl ester of 2,la-D
50£ n-butyl ester of 2,)i,5-T

Orange II

501 n-butyl ester of 2,lj-D
5CK icooctyl ester of 2,11,5-T

Vhite

fiO'? triisopropanolaninfi salt
of 2,lj-D
20'' triisopropanolanine snlt
of picloram

a. Herbicide drums were identified bjr a four-inch-wide circular band
of paint colored in correspondence with there color codes.

The Coriuiittee on the Effects of Herbicides in Vjotnan, llr.tionnl
Research Council, The Effects of j-&gt;j.rMcji(iof in South Viet ruin; Part t
(rnshin^ton, D.C.: i:ati^r.?il /cnr'eny of" Sciences, 197TT), p II-Tf rprt,
!?«view ?nd Evaluation of / t u'/ "TVjfnlir-tion" Pror;r?n in South Vin^ner. /Y)&amp;Jt
pp 31-32; rrrt, Capt /-Ivin L. Yonn",, et, al, U5AF Occupational and rm-i?'on-Tftn
Health Laboratory, The Tb?"icolo'y, rinvironriental ^ate, ar,d rur.an P.ick of
Herbicide Orange anr5 Its Associated Moxin, &lt;"'ct 7B, p 1-7.

�</text>
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            <element elementId="50">
              <name>Title</name>
              <description>A name given to the resource</description>
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                  <text>Alvin L. Young Collection on Agent Orange</text>
                </elementText>
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            <element elementId="41">
              <name>Description</name>
              <description>An account of the resource</description>
              <elementTextContainer>
                <elementText elementTextId="49809">
                  <text>&lt;p style="margin-top: -1em; line-height: 1.2em;"&gt;The Alvin L. Young Collection on Agent Orange comprises 120 linear feet and spans the late 1800s to 2005; however, the bulk of the coverage is from the 1960s to the 1980s and there are many undated items. The collection was donated to Special Collections of the National Agricultural Library in 1985 by Dr. Alvin L. Young (1942- ). Dr. Young developed the collection as he conducted extensive research on the military defoliant Agent Orange. The collection is in good condition and includes letters, memoranda, books, reports, press releases, journal and newspaper clippings, field logs and notebooks, newsletters, maps, booklets and pamphlets, photographs, memorabilia, and audiotapes of an interview with Dr. Young.&lt;/p&gt;&#13;
&lt;p&gt;For more about this collection, &lt;a href="/exhibits/speccoll/exhibits/show/alvin-l--young-collection-on-a"&gt;view the Agent Orange Exhibit.&lt;/a&gt;&lt;/p&gt;</text>
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      <name>Text</name>
      <description>A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.</description>
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        <element elementId="52">
          <name>Box</name>
          <description>The box containing the original item.</description>
          <elementTextContainer>
            <elementText elementTextId="6589">
              <text>020</text>
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        <element elementId="53">
          <name>Folder</name>
          <description>The folder containing the original item.</description>
          <elementTextContainer>
            <elementText elementTextId="6590">
              <text>0320</text>
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          <name>Series</name>
          <description>The series number of the original item.</description>
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            <elementText elementTextId="6592">
              <text>Series II</text>
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          <element elementId="50">
            <name>Title</name>
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              <elementText elementTextId="6591">
                <text>Appendix 1: Characteristics of Herbicides Used in Southeast Asia</text>
              </elementText>
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          <element elementId="49">
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            <description>The topic of the resource</description>
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              <elementText elementTextId="6593">
                <text>herbicide toxicology</text>
              </elementText>
              <elementText elementTextId="6594">
                <text>herbicide properties</text>
              </elementText>
              <elementText elementTextId="6595">
                <text>Ranch Hand</text>
              </elementText>
            </elementTextContainer>
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        <src>https://www.nal.usda.gov/exhibits/speccoll/files/original/2700448d4c27fac85d82aaafc94508c9.pdf</src>
        <authentication>99f0f4db39c2196f5e1875b47be6f336</authentication>
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                  <elementText elementTextId="63101">
                    <text>00174

Auther
International Business Machines Corporation, 1601 N.
Kent Street, Arlington, Virginia 22209
ReDOPt/ArtlCle Title Application File Description: Herbicide File (HERBIE - MACV) (HERB01
OASD/REPRO)

Yuan

1971
March 1

Mr
17
Description of a database of herbicide application mission data.

Friday, January 05, 2001

Page 174 of 194

�. p]' cation File Description
V

Herbicide File (HERBIE - MACV)
{HERB01 - OASD/REPRO)

File Dote:

1 March 1971

Project Officer:

John C. Patterson
8312, OX7-2356

File Programmers:

A.B. Harmon
F.J. Sears
IBM Support Group
0X5-0491

This Application File Description has been prepared by the
International Business Machines Corporation, 1601 M. Kent
Street, Arlington, Virginia
22209, for
the
National
Military Command System Support Center under DCA Contract
Number DCA 1QQ-70-C-Q014.

�CHAPTER 1
FILE DESCRIPTION

Purpose
The purpose of the HERBIE file is to provide users with a
means of retrieving herbicide mission history data. The
data in the file is classified CONFIDENTIAL.
Information Types
Data in the file is presented in a single fixed record for
each unique flight mission. Information on flight number,
mission route, type and quantity of herbicide sprayed, abort
reasons appeared in the original file {HERBIE).
When the
file was revised by OASD (REPRQ) data on'track length, flow
rates, concentration rate and acres sprayed were added.
Input Source
The HERBIE file, was developed for use by the Military
Assistance Command, Chemical Operations Division, Vietnam,
Data for this file was extracted -from monthly worksheets
prepared
by Chemical Operations Division, MACV, using
information received from their .primary data sources.
File Revision History
The HERBIE file has been converted to a new and expanded
file, HERB01. The data in the new file includes all of the
data in HERBIE with the addition of several new data fields,
This new data, designed to enhance analysis of herbicide
missions, was developed by specially prepared programs using
HERBIE data as input. The new data fields are identified in
Chapters 2 and 3 by marking with an asterisk.
User Organization
The
Regional Programs Division of the Office of the
Secretary of Defense (OASD/REPRQ) is the primary user of the
information in this file.
Data Record Arrimgen'ent:
Data contained in each record of the ^EKBQl file is arranged
•as follows:

Control Set - Uniquely identifies a record

�1.
2.

Date of flight mission
Combat Tactical Zone over which a mission
was flown
3.
Mission Project Number
4. ' Multiple run of mission indicator
5.
Multiple province, mission coverage indicator.
Fixed Set
1.
2.
3.
4.
5.
6.
7.
8.

Province Data
Aircraft scheduled and delivery data
Herbicide type and gallons sprayed
Aircraft abort data
Run type
Acres sprayed
Concentration and flow rates
Total track length of mission,

Periodic Set 1 - Mission Track Data
1.
2.

Coordinate data - UTM and Lat/Leng
Length of legs of track of mission

File Growth Rate
The file is not expected to grow except through corrections
to present data records. It includes data from July 1965 to
December 1970.
File Size
The file contains approximately
5100 fixed records and
13,500 periodic records. The record size ranges from 104 to
1216 bytes and the file occupies 20 cylinders of 2314 disk
of space. A magnetic tape copy of this file is maintained.

�CHAPTER 2
FILE FORMAT TABLE

File Name - HERB01
FLD/GRP
NAME

STATEMENT
OPERATOR

FIELD
SIZE

YY
MM
DD
DATE

FIELD
FIELD
FIELD
GROUP

002
002
002

FIELDS - YY

CTZ
NUMBR
XRUN
MISSION

FIELD
FIELD
FIELD
GROUP

ALPHA
ALPHA
ALPHA
ALPHA

MM

FIELD
GROUP

CTL
CTL
CTL

CTL

FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
GROUP

MULTI

FIELD
FIELD
GROUP

FIELD

PROJ

001
006
002
002
002
002

ALPHA
NUMER
ALPHA
NUMER
NUMER
NUMER
ALPHA
AIRA

002 .
005

FIELDS - AGENT
HIT

MISSION

ALPHA

FIELDS - AIRF
AGENT
GAL
AGGAL

ALPHA
ALPHA

GROUP
FIELDS - DATE

FLAG
SEQNQ
PROV
AIRF
AIRA
AIRP
AIR

ALPHA
ALPHA
ALPHA
ALPHA

XRUN

001

FIELDS - CTZ
RECID

DD

001
008
001

FIELDS - NUMBR
MULTI
PRQJ

MODE

902

AIRP
ALPHA
NUMER
ALPHA

GAL
NUMER

�FLD/GRP
NAME

STATEMENT
OPERATOR

FIELD
SIZE

MABRT
WABRT
BABRT
ABORT
FAIL

FIELD
FIELD
FIELD
FIELD
GROUP

001
001
001
001

NUMER
NUMER
NUMER
NUMER
ALPHA

FIELDS - MABRT
TYPE
HECTARE
SQKILO
ACRES
AREAS

FIELD
FIELD
FIELD
FIELD
GROUP

WABRT

FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
FIELD
ENDFS

ABORT
ALPHA
NUMER
NUMER
NUMER
ALPHA

SQKILO

GROUP

ACRES
ALPHA

FIELDS - PRQV
FAIL
AREA
CONT
FLOW
TRACK
0TMID
UTM
LATLONG
CORDS
KMLEG
MILEG

BABRT

001
. 008
008
008

. FIELDS - HECTARE
FIXED

MODE

008
008
008
008
002
008
015
015
004
004

AIR AGGAL HIT
TYPE AREAS

CTL

NUMER
NUMER
NUMER
NUKER
ALPHA
ALPHA
ALPHA
COORD
NUMER
NUMER

�CHAPTER 3
FILE DETAIL

Field/Group names preceded by an asterisk (*} are new
field/groups in HERB01. All other fields/groups appear in
both the KERBIE and HERB01 versions of the Herbicide file.
Control Set
!
£

FIELD/
GROUP

LENGTH

CODE

DATA VALUES

*YY

FIELD

2

65-70

ALPHA

This field contains the year of the mission, i.e.,
70 for 1970.
*MM

FIELD

2

1-12

ALPHA

This field contains the month of the missions, i.e.,
04 for April.
*DD

FIELD

2

1-31

ALPHA

This field contains the day of the mission.
DATE

F in
HERBIE
G in
HERB01

6

ALPHA

This data element contains the date of the mission.
*CTZ

FIELD

1

1-4

ALPHA

This field identifies the Combat Tactical Zone over
which the mission was flown.
*NUMBR

FIELD

8

ALPHA

This field contains the mission project nuriber which
is normally six characters-left justified.
*XRUN

FIELD

1

A, B, C,
etc.

ALPHA

«

This field identifies the first, second, third, etc.
run of the mission.

�ID

FIELD/
GROUP

LENGTH

*MISSION

GROUP

9

CODE

DATA VALUES
. ALPHA

This group contains a unique mission number for a
project.
*MULTI

FIELD

1

X

ALPHA

An 'X1 in this field indicates that the mission
covered more than one province; if blank, only one
province.
PROJ

F in
HERBIE
G in
HERB01

11

ALPHA

This data element contains a unique identifier for
each mission.
RECID

GROUP

17

ALPHA

This group is composed of DATE and PROJ and provides
a unique identification for each record in the file.
Fixed Set
*FLAG

FIELD

1

Table A-l ALPHA

This field is generated after analysis of the records
or after the results of various statistical analysis have
been calculated.
*SEQNO

FIELD

6

OTMER

This field is generated by a special range program.
The sequence number is used to facilitate preparation of
plots.
PROV

FIELD

2

Table A-2 ALPHA

This field contains a code representative of the
province in which the mission was flown or, in case of
a multi-province mission, the province in which the
mission started.
AIR?

FIELD

2

H'l".''"

This field contains the number of aircraft scheduled

�FIELD/
GROUP

ID

LENGTH

CODE

•

DATA VALUES

to fly the mission.
AIRA

FIELD

2

NUMER

This field contains the number of aircraft actually
airborne for the mission.
AIRP

FIELD

2

NUMER

This field contains the number of aircraft actually
making delivery (productive) on a mission.
*AIR

GROUP

6

NUMER

This group contains the data elements AIRF, AIRA,
and AIRP.
AGENT

FIELD

2

0=Orange
B=Blue
W=Hhite

ALPHA

This field contains the type of herbicide used
on a particular mission.
GAL

FIELD

5

,

NUMER

This field contains the number of gallons of
herbicide sprayed during a mission.
*AGGAL

GROUP

7

ALPHA

This group contains the data elements AGENT and

GAL.
HIT

FIELD

2

NUMER

This field contains the number of hits taken
during a run.
MABRT

FIELD

1

NUMER

This field contains the number of aborts, either
air or ground, attributable to maintenance.
V7ABRT

FIELD

1

NUMER

This field contains the number of aborts
attributable to weather.

�FIELD/
' GROUP

ID
BABRT

FIELD

LENGTH

CODE

1

DATA VALUES
NUMER

This field contains the number of aborts
attributable to battle damage,
ABORT

FIELD

1

NUMER

This field contains the number of aborts
attributable to sources other than BABRT, WABRT,
and MABRT.
*FAIL

GROUP

4

. ...

NUMER

This group contains the data elements MABRT,
WABRT, BABRT, and ABORT.
TYPE

FIELD

1

D=Defoil- ALPHA
ate
C=Crop

•;.--'

This field contains the type of mission
flown.
, *HECTARE

FIELD

8

NUMER

This field contains a three decimal place
value equal to the reciprocal of the content of
the field CONT.
*SQKILO

FIELD

8

NUMER

8

NUMER

24

NUMER

Not used.
*ACRES

FIELD

Not used.
*AREAS

GROUP

This group contains the data elements HECTARE,
and SQKILO and ACRES when used.
*FIXED

GROUP

46

.

ALPHA

This group contains the dat*i "laments
AIR, AGGAL, HIT, FAIL, TY'.'!r, an ,1 ;.....".
*AREA

FIELD

8

•

8

�FIELD/
ROUP

G

IE

LENGTH'

CODE

DATA VALUES

This field contains the number of acres sprayed.
(Not to be confused with field ACRES which is not
used.) It is computed by multiplying TRACK by .08
by 247 by AIRP. The value contains two decimal
places of precision.
*CONT

FIELD

8

NUMER

This field contains the concentration of
herbicide in gallons per acre. It is computed
by dividing GAL by AREA. The value contains two
decimal places of precision.
*FLOW

FIELD

8

&lt; NUMER

This field contains the flow rate in gallons
per second of herbicide dispensed from a single •
aircraft during a mission. It is computed by dividing
GAL by a figure obtained by multiplying AIRP by TRACK
by 14.95. The value contains two decimal places of
precision.
*TRACK

FIELD

8

NUMER

This field contains the total distance flown, in
kilometers, during the spray portion of a mission, and
is computed by summing the periodic field KMLEG. Each
track contains at least two points, a start and stop
point. The value is rounded and has no decimal places
of precision.
Periodic Set 1
UTMID

FIELD

2

ALPHA

This field contains the control field for the
subsets. They represent either UTM coordinate start,
turn or stop points, depending on the coordinate to
which they are attached. A' value of 10 represents the
start point of the first leg of a mission and succeeding
values (11, 12, 13, etc.) represent turn points. The
last value in the run is the end point. A 20 or 30,
etc. represents the start of a second or third leg of
a mission and succeeding values represent turn points
within that leg of the mission.
UTM

FIELD

8

ALPHA

This field contains the UTM coordinate value

�IE

FIELD/
GROUP

LENGTH

CODE

DATA VALUES

which represents the point of start, turnr or stop
of the leg of the mission.
*LATLONG

FIELD

15

ALPHA

This field contains the latitude-longitude
equivalent of the UTM value converted by a UTM
conversion program.
*CORDS

FIELD

15

"

COORD

This field contains the KIPS coordinate mode
presentation of LATLONG and is included in the file
to enable the execution of the circle search and
polygon overlap features of NIPS.
*KMLEG

FIELD

4

NUMER

This field contains the computed great circle
distance in kilometers between adjacent coordinate
points which defines a leg of a mission. KMLEGs for
a mission are summed for TRACK.
f

*MILEG

FIELD

4

NUMER

This field contains the converted value of
KMLEG in miles, computed by multiplying KMLEG by
.62.

10

�CHAPTER 4
FILE MAINTENANCE

This file is static and no update or expansion is expected.
Periodically, during analysis of the file, if an error in
the data is found and the correct value for the error can be
determined, the error is corrected. Otherwise, the record
in error is flagged, and no further action is taken.

11

�CHAPTER 5
RETRIEVAL AND OUTPUT

This file
developed.

is

new

and

Output from HERBIE is
(REPRO) analysts and are
requirement.

standard

reports

have

not

been

responsive to the needs of OASD
of " a one time report or plot

A formatted record dump has been prepared for display of*
data in each of the two HERBIE files.
Additionally,
Vietnam-wide plots of mission tracks by year and herbicide
type have been prepared. . '-

12

�APPENDIX A

CODE TABLES

13

�TABLE A-l
FLAG CODE LIST

1

Less than two UTM coordinates per track, or
total number of aircraft in AIRP = 0 or blank,
or total number of gallons in GAL = 0 or blank.

2

The concentration (CONT) is more than two
standard deviations away from the mean.

3

The inversion of concentration is less than two
standard deviations away from the mean.

4

Same as 2 except that FLOW is examined.

5

Conditions 2 and 3 exist at the same time.

6

Either conditions 2 and 4 or conditions 3 and 4
exist at the same time.

7

Conditions 2r 3, and 4 exist at the same time.

14

�TABLE A-2
PROVINCE CODE LIST

Quang Tri
Thua Thlen
Quang Nam
Quang Tin
Quang Ngai
Hue
Da Nang

II CORPS

06
07
08
09
10
11
12
13
14
15
16
17
93
94

Kontuin
Binh Dinh
Pleiku
Phu Bon
Phu Yen
Darlac
Khnah Hoa
Ninh Thuan
Tuyen Due
Quang Due
Lam Dong
Binh Thuan
Cam Ranh
Dalat

III CORPS 18
19
21
22
23
24
25
26
27
28
29
95
96

Binh Tuy
Long Khanh
Phuoc Long
Binh Long
Binh Duong
Tay Ninh
Hau Hghia
Bien Hoa
Phuoc Tuy
Long An
Gia Dinh
Vung Tau
Saigon

IV CORPS

Go Cong
Kicn "UO:VT
Kien ?/.cnr
Dinh Tuopg
Kien Hoa

30
31
32
33
34

15

�PROV
CODE

PROVINCE NAME

35
36
37
38
39
40
41
42
43
44
46

Vinh Binh
Vinh Long
An Giang
Kien Giang
Chuong Thien
Phong Dinh
Ba Xuyen
An Xuyen
Bac Lieu •
Chau Doc
Sa Dec

16

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Yoar

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Month/Day
Color
Number of Images

D

2

Possibly timeline of Ranch Hand missions?

Monday, January 22, 2001

Page 329 of 341

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&lt;p&gt;For more about this collection, &lt;a href="/exhibits/speccoll/exhibits/show/alvin-l--young-collection-on-a"&gt;view the Agent Orange Exhibit.&lt;/a&gt;&lt;/p&gt;</text>
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