United States
Environmental Protection
Agency
Air and Energy Engineering
Research Laboratory
Research Triangle Park NC 27711
Research and Development
EPA/600/S2-85/010 Apr. 1985
Project Summary
Textile Dyes and Dyeing
Equipment: Classification,
Properties, and Environmental
Aspects
S. V. Kulkarni, C. D. Blackwell, A. L. Blackard, C. W. Stackhouse, and
M. W. Alexander
New dyes are continuously being
developed to meet the demands of
new technology, new fabrics, ad-
vances in dyeing equipment, and to
overcome the serious environmental
concerns associated with some ex-
isting dyes. The impact of these new
replacement dyes on the environment
and workers can be assessed by com-
paring them with similar existing
dyes. For this study, information was
collected from the open literature,
product technical brochures, trade
association studies, and visits to two
textile dyeing operations. The col-
lected information was used to
characterize the physical, chemical,
and application properties of 14
classes of textile dyestuffs. Informa-
tion collected on textile dyeing equip-
ment was studied to describe dyeing
procedures, the operation of various
types of textile dyeing equipment, and
to estimate both the amount of textile
dyestuff released to the environment
from a typical dyeing operation and
the extent of worker exposure
associated with each operation. These
estimates were made on a weight-per-
weight basis of dyestuffs to fabric
dyed for typical operations. The plant
visit information was used to verify
data obtained from the literature and
to fill data gaps. This information
enabled estimates to be made of
dyestuff releases from actual dyeing
operations for each type of dyeing
equipment described. All information
was collected on an as-available basis
and included data generated by site
visits and discussions with other in-
dividuals familiar with this industry.
Information on air emissions to the
ambient environment from textile dye-
ing operations was collected and
reported; however, little data were
available on air emissions of dyestuffs
to the ambient air. For data on worker
exposure to airborne dyes, four 1978
studies by the National Institute for
Occupational Safety and Health were
consulted. Unfortunately, these
studies were of limited use since they
dealt only with benzidene-based dyes
which have been curtailed from
widespread use by the industry.
Where possible, worker exposure
times were recorded during the plant
visits.
A data base from EPA's Effluent
Guidelines Division was accessed:
results of a brief analysis of this base
are reported. Information extracted
from the data base included the
number and size range of wastewater
treatment and pretreatment plants of
various textile dyeing operations. This
information, separated into direct and
indirect wastewater discharges, was
presented for small, medium, and
large textile dyeing operations.
Since there were data gaps in the
area of the emission/release of textile
dyestuffs to the environment, addi-
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tional areas of possible investigation
are identified, including data to
characterize worker exposure time
and dyestuff concentration levels,
quantities of dyestuffs purchased by
textile dyeing operations, and updated
plant size data specific to dyeing
operations. This information would
create a larger, more comprehensive
data base from which to obtain a
more realistic profile of the textile
dyeing industry.
This Project Summary was
developed by EPA's Air and Energy
Engineering Research Laboratory,
Research Triangle Park, NC, to an-
nounce key findings of the research
project that is fully documented in
separate report of the same title (see
Project Report ordering information at
back).
Introduction
In 1980, 111 million kg (245 million Ib)
of synthetic organic dyestuffs were pro-
duced in the U.S. The U.S. imported
another 13 million kg (29 million Ib), or 12
percent of the domestically produced
amount of synthetic organic dyestuffs.
About two-thirds of the dyestuffs pro-
duced in the U.S. were used by the tex-
tile industry for dyeing. Until recently,
azo-type acid dyes, direct dyes, and
pigments based on benzidine and ben-
zidine congeners were commercially im-
portant and very popular dyestuffs.
However, recent health and environmental
concerns about benzidine-based dyes
have caused dyestuff manufacturers and
dye users to seek less toxic and en-
vironmentally safer replacements. In addi-
tion, new technology, new fabrics, and
advances in dyeing equipment provide in-
centive to develop new dyes.
Knowledge of the physical, chemical,
and application properties of new data
can provide valuable information about
the dye's environmental release and
worker exposure effects. One method
used to determine this information for
new and replacement dyes is by compar-
ing the properties of new dyes with
similar dyes within the same dye class for
which such information is already known.
This report provides a basis upon which
such a comparison can be made.
Summary
Three major areas of the study relate to
dye class categorization, dye equipment
categorization, and wastewater treatment
plant size.
2
Dye Class Categorization
Using general dye chemistry as the
basis for classification, textile dyestuffs
are grouped into 14 categories or classes:
(1) acid dyes, (2) direct (substantive)
dyes, (3) azoic dyes, (4) disperse dyes, (5)
sulfur dyes, (6) fiber reactive dyes, (7)
basic dyes, (8) oxidation dyes, (9) mor-
dant (chrome) dyes, (10) developed dyes,
(11) vat dyes, (12) pigments, (13) op-
tical/fluorescent brighteners, and (14) sol-
vent dyes.
Six of the above dye classes (1-6),
selected by EPA's Office of Toxic
Substances, were the focus of intensive
data collection efforts in an attempt to
describe each class, its chemistry, and
chemical and physical properties as fully
as possible. Information collected for the
remaining eight classes (7-14) was similar,
but not as detailed. Selection of these
classes (1-6) was based in part on a pro-
jection of new dye development activities
and concerns about the health and en-
vironmental effects of these dyes. The
following paragraphs briefly identify these
six classes of dyes and describe their use
by the textile dyeing industry.
Acid dyes are typically used to dye
acrylics, wool, nylon, and nylon/cotton
blends. They are called acid dyes because
they are normally applied to the
nitrogenous fibers of fabrics in organic or
inorganic acid solutions. Chemical reac-
tions between the dye and fiber form an
insoluble color molecule on the fiber. In
1980, acid dyes accounted for 10 percent
of total U.S. dye production. The three
most commercially important acid dyes
are azo, anthraquinone, and tri-
arylmethane. These dyes are generally ap-
plied as a liquid at elevated temperatures
of greater than 39°C (102°F). Although
acid dyes may be used for transfer print-
ing, this use is not commercially im-
portant. In general, these dyes have poor
wet fastness. Molecular weights range
from 200 to 900, and the higher the
molecular weight, the poorer the leveling
(uniformity of dye uptake) property.
Direct dyes are applied in an aqueous
bath containing ionic salts and elec-
trolytes. These dyes are normally used to
dye cotton and other cellulosic fibers;
they bond to fibers by electrostatic forces.
In 1980, 13 percent of the dyes produced
in the U.S. were direct dyes. These dyes
are highly soluble even in cold water;
most have solubilities in water from 8 to
40 g/l. A few have solubilities up to 80
g/f.
Azoic dyes are applied by combining
two soluble components impregnated in
the fiber to form an insoluble color
molecule. These dye components, sold as
paste-like dispersions and powders, are
used chiefly for cellulosics, especially cot-
ton. Dyebath temperatures of 16-27°C
(60-80°F) are generally used to the shade.
Disperse dyes are colloidal and have
very low water solubilities. Most of these
dyes are used for polyester, nylon,
acetate, and triacetate fibers. They are
usually applied from a dye bath as dis-
persions by direct colloidal absorption.
Dye bath conditions (temperature, use of
carrier) are varied based on the degree of
difficulty encountered by the dyes in
penetrating the fiber being dyed. They are
sometimes applied dry at high
temperatures by means of a sublimation
process followed by colloidal absorption.
High temperature sublimes the dye and,
once it is inside the fiber, the dye con-
denses to a solid colloidal state and is ab-
sorbed on the fiber.
Sulfur dyes are used primarily for cot-
ton and rayon. The application of sulfur
dyes requires carefully planned trans-
formations between the water-soluble re-
duced state of the dye and the insoluble
oxidized form. Sulfur dyes can be applied
in both batch and continuous processes;
continuous applications are preferred
because of the lower volume of dye re-
quired. These dyes generally have a poor
resistance to chlorine. In general, sulfur
blacks are the most commercially im-
portant colors and are used where good
color fastness is more important than
shade brightness. Sulfur dyes are not ap-
plicable to wool or silk because the fibers
are chemically damaged by the dyeing
process.
Fiber reactive dyes derive their name
from the fact that they form covalent
bonds with the fiber molecules to be
dyed. Molecules of fiber reactive dyes are
much smaller than the complex molecules
of direct dyes. Fiber reactive dyes are
unique in that they become an integral
part of the textile fiber that is dyed.
Although more expensive than direct
dyes, advantages of reactive dyes are ex-
cellent shade reproducibility and good
leveling properties. These dyes also have
outstanding wet fastness. In 1980, about
2 percent of the total dyestuffs produced
in the U.S. were fiber reactive dyes.
These dyes can be subdivided into either
"hot" or "cold" dyeing groups, based on
the temperature of application. Although
silk and nylons can be dyed with fiber
reactive dyes, the chief fibers dyed are
cellulosics and wool. These dyes are also
popular for printing textiles, since e
the brightest colors are wet fast.
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Fiber reactive dye products were first
introduced in 1956; by 1980 there were 66
on the market. Of these, 59 represent
about equal numbers of yellow, orange,
red, and blue dyestuffs. The remaining in-
clude black, brown, green, and violet
shades. By 1982, the number of fiber
reactive dyestuffs listed for sale had in-
creased to 139, more than twice the
number available in 1980. This increase,
along with the fact that the dye shades
are very reproducible and wash fast, in-
dicates a continued increase in impor-
tance of fiber reactive dyes in the future.
Based on a linear regression projection of
the past 10 years' production volumes of
fiber reactive dyestuffs, this class of dye
is expected to show a 56 percent increase
in production volume by 1990 to a level of
approximately 19.7 million kg (49.3 million
Ib). The fiber reactive dye class is ex-
pected to experience the largest percent-
age increase in production of any of the
14 dye classes by 1990.
Dye Equipment Categorization
Ten major types of dyeing equipment
are now in use by the textile dyeing in-
dustry. Some of these machines required
minor operational modifications to accom-
modate the newer dyes and to take ad-
vantage of recent advances in dyeing
equipment technology. The 10 general
types of dyeing equipment are: (1) beams,
(2) becks, (3) jigs, (4) jets, (5) package
units, (6) vats, (7) semicontinuous (pad-
batch dye machines), (8) continuous dye-
ing (TAK dyeing, space dyeing, thermosol
dyeing, and pad-steam dyeing), (9)
transfer printers, and (10) direct textile
printers.
Four of the 10 classes (2, 7, 9, and 10)
were selected by EPA's Office of Toxic
Substances for detailed study. Selection
was based on the predicted continued
and predominant use of the equipment in
the textile dyeing industry.
The four types of dyeing equipment are
fully described with respect to operation
methods and procedures, physical
features, and the dyeing processes for
which they are suitable. Machine types
also are categorized by the fabric which
can be dyed and then related to the dye
classes that typically would be used with
the various machine/fabric combinations.
Detailed time/temperature dyeing profiles
also were developed for numerous
fabric/machine/dyestuff combinations.
The important advantages and features
of these classes of dyeing equipment
were identified along with their limitations
and disadvantages in dyeing different
types of fabric. The equipment specifica-
tions are presented for the currently
available dyeing equipment, and dyestuff
use requirements were estimated for each
machine, based on typical fabric/dye
combinations. These estimates were
verified with information collected during
two plant visits.
Two textile dyeing operations were
visited to verify information collected in
the literature search and to verify actual
dyeing procedures, attainable dye exhaus-
tion rates, and drug room procedures,
and to determine the typical quantities of
dye and fabric used in dyeing operations.
The two plants visited were selected
because: (1) small and large dyeing opera-
tions were represented; (2) four types of
dyeing equipment of interest were in use;
(3) a commission dyeing operation involv-
ing several dye products was represented;
and (4) the distance from Research
Triangle Park, NC, was less than a day's
drive. Information obtained from these
two plant visits was used to develop a
mass balance for typical dye
equipment/fabric/dyestuff combinations.
The mass balance estimates indicate
the amount and manner in which a dye
substance is released to the environment
from specific types of dye equipment. The
dyestuff release from the fabric and rinse
water was found to vary widely for the
different types of dyeing equipment and
the fabric dyed. The total amount of
dyestuff can be accounted for in the
fabric, in the rinse water, and in the at-
mospheric environmental release.
Therefore, rinse time, rinse volume, and
dye exhaustion rates are important
parameters for estimating environmental
release. The following descriptions of
each type of dyeing equipment and its
typical mass balance illustrate the variabili-
ty of dyeing equipment.
Beck dyeing takes place in a U-shaped
box or trough with a gradually curved
bottom. The fabric to be dyed is placed
on a driven reel above the box and is
allowed to slide down the back of the
box, travel through the dye liquor in the
box, and then continually return to the
reel. This procedure is continued until
dyeing is completed. Beck dyeing is best
suited to woolen knit and woven goods
as well as heavyweight fabrics such as
carpets, twills, and satins.
Beck dyeing utilizes the exhaustion dye-
ing method which is aided by heating the
dye liquor with steam. In order to
decrease the dyeing time, beck dyeing
machines are pressurized to accelerate the
exhaustion process. These high
temperature and high pressure becks
(jets) are best suited to elasticized fabrics
where machine tension on the fabric
could cause damage. Pressure becks
typically use 3,3007 (858 gal.), or 3,245 kg
(7,153 Ib), of water per 454 kg (1,000 Ib)
of fabric dyed; an atmospheric beck uses
twice this volume of water to dye the
same quantity of fabric. The typical fabric
dyed in an atmospheric beck is cotton;
polyesters generally are dyed in a pressure
beck. Dye exhaustion rates of 90 to 100
percent were achieved depending on the
dye class used and the shade of color
desired. For example, a medium to light
color was found to exhaust 100 percent;
whereas, a dark color would only achieve
90 percent exhaustion.
A typical atmospheric beck using sulfur
dyes on cotton fabric releases about 0.5
kg (1.2 Ib) of dye solids per 454 kg (1,000
Ib) of fabric dyed in its rinse water ef-
fluent. This amount depends on the ex-
haustion and dye shade desired. An addi-
tional 4.8 kg (11 Ib) of dye per 454 kg
(1,000 Ib) of fabric dyed leaves the dye
operation with the fabric, depending on
the exhaustion and dye shade desired.
Pressure becks (or jet machines) typically
apply disperse dyes on polyester. This
operation releases 1.2 kg (2.7 Ib) of
disperse dyes per 454 kg (1,000 Ib) of
fabric dyed in water effluent, depending
on the exhaustion and shade desired. The
dyed fabric typically contains 11.2 kg
(24.5 Ib) of disperse dye solids per 454 kg
(1,000 Ib) of polyester fabric, but this can
vary depending on exhaustion and desired
shades.
Pad-batch dyeing is accomplished with
a padding machine that is equipped with
a set of wringers which force the dyestuff
through the fabric. Once the fabric has
been saturated with dye, the fabric is
developed in a batch immersion operation
to exhaust the dye onto the fabric. This
process can be used for vat, sulfur, azoic,
solubilized vat and diazotized, and
developed direct dyes. Exhaustion rates
for this type of equipment range from 60
to 95 percent, and depend on the amount
of process time and the fabric/dye class.
Rinse time for this process ranges from 1
hour to 4 or 5 hours. Because of the
numerous steps required, this process is a
large user of water compared with other
wet dyeing operations. Water use ranges
from 6,240 to 9,120f (1,648 to 2,409 gal.),
or 6,232 to 9,110 kg (13,739 to 20,084 Ib),
per 3,175 kg (7,000 Ib) of fabric dyed in a
batch.
The third type of dyeing equipment in-
vestigated in detail was a transfer printer.
The method most commonly used in the
transfer printing process involves the
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direct transfer of a pattern or color from a
printed paper to the fabric. This is a dry
process and achieves almost complete
color exhaustion onto the fabric. A typical
transfer printing operation purchases its
supply of transfer paper and therefore
does not generate any dye waste at the
textile printing facility. The expended
transfer paper minus its dyestuff coating
is discarded with the plant's refuse.
Transfer printing is accomplished by a
sublimation process in which the solid
(dye) is vaporized by heat and condenses
into a solid on the fabric when cooled.
Disperse dyestuffs are the dye class most
typically used for transfer printing onto a
polyester fabric. Transfer printing uses
about 0.5 kg (1.1 Ib) of disperse dyestuff
per 45 kg (100 Ib) of fabric. Some other
methods of transfer printing use a wet or
semiliquid process, but the dry process
described above is becoming predominant
because it is unique, uncomplicated, and
and requires less skill to operate than
other types of dyeing equipment. In addi-
tion, the dry process is suitable for
polyester fabric, which has traditionally
been one of the most difficult fibers to
dye. This process also can be used on
acetate, triacetate, and nylon; its use with
disperse dyes is limited because of the
high temperature involved. Its use on cot-
ton, wool, or silk is limited by the lack of
affinity and/or fastness properties for
disperse dyes and because of cylinder
head temperatures as high as 230°C
(446°F) that will scorch these delicate
fibers.
The fourth type of textile dyeing equip-
ment that was investigated in detail was
direct textile printing. This method uses a
combination of mechanical and chemical
means to dye the fabric substrate. The
two primary methods of direct printing are
roller and screen: in both, the dyestuff is
applied as a print paste or printing ink.
The paste or ink is dispersed and either
rolled directly onto the fabric (roller print-
ing) or extended (screen printing) from a
circular or flat perforated screen onto the
fabric. Acid dyes are typically used in this
process and are applied to nylon knit
fabrics; pigments and reactive dyes are
used for cottons. In actual printing opera-
tions, 100 percent of the dye is applied to
the fabric; consequently, the only en-
vironmental dyestuff release is via the
printed fabric. However, some of the
dyestuff on the printed fabric will be
released during rinsing. Since this printing
method results in high quality designs, it
is becoming the most appealing method
for coloring designer and fashion apparel.
Wastewater Treatment
Plant Size
Data from EPA's Effluent Guidelines
Division were analyzed to characterize the
volume of wastewater effluents from tex-
tile dyeing operations and the general
methods of treatment. Although this is
the most current data available, it does
not reflect any changes since it was com-
piled in 1977. The data are based on infor-
mation provided by textile operations from
two standard industrial classifications
(SIC): 223 and 226. These classifications,
covering wool weaving and finishing mills
and textile finishing (excluding wool)
plants, were selected for analysis because
most dyeing operations fall into one or
the other.
The data provided by 494 plants per-
forming textile dyeing were analyzed. Of
these, about 30 percent (only 147 plants)
discharge their wastewater effluent after
on-site wastewater treatment. The rest
pretreat their wastewater and discharge it
to publicly owned treatment works
(POTW).
Both the indirect and direct discharges
were separated into three plant size
categories (small, medium, and large)
based on their daily fabric production
rates. These categories were determined
by selecting the medium-sized plant pro-
duction rate range to be between 0.75
and 1.25 times the overall average daily
production rate. Plants with higher pro-
duction rates were considered to be large;
those with lower production rates were
considered to be small. From this distribu-
tion, typical average plant production
rates and wastewater volumes were deter-
mined for each plant size.
A typical small plant, directly discharg-
ing to the surface waters after on-site
waste treatment, produces 14,000 kg
(31,000 Ib) of fabric per day and generates
0.02 m3/s (0.40 million gpd) of
wastewater. The typical medium-sized
plant produces 44,000 kg (97,000 Ib) of
fabric per day with a resultant wastewater
discharge of 0.04 m3/s (0.90 million gpd).
The typical large direct discharging plant
produces 107,000 kg (236,000 Ib) of fabric
per day and discharges an average of 0.08
m3/s (1.90 million gpd) of wastewater.
Typical daily production rates for the
small, medium, and large plants discharg-
ing their wastewater to a POTW were
6,000 kg (14,000 Ib), 23,000 kg (50,000
Ib), and 86,000 kg (189,000 Ib), respective-
ly. Pretreatment facilities for these typical
plants were found to have the following
design capacities: small, 0.01 m3/s (0.26
million gpd); medium, 0.02 m3/s (0.52
million gpd); and large, 0.05 m3/s (1.1
million gpd). The design flow of the
respective POTWs that received the
typical dyeing plant effluent averaged:
small, 0.73 mVs (16.70 million gpd);
medium, 0.83 mVs (18.90 million gpd);
and large, 1.20 m3/s (28.40 million gpd).
Conclusions
Based on the information collected for
this study, new dyestuffs will continue to
replace older dyes. In the textile industry,
the two dye classes that will experience
the most growth are fiber-reactive and
disperse (sublimable) dyes. A concurrent
increase in the use of new dyeing equip-
ment (e.g., the pressure beck (jet) and
transfer and direct printers) is expected
because of their high dyeing efficiency
and exhaustion rates. For these reasons
and since this type of equipment uses lit-
tle or no water compare with other equip-
ment (e.g., the beam, pad-batch opera-
tion, and atmospheric beck), many dyers
will reduce the quantity of wastewater
and dye solids discharged to the environ-
ment. However, because the new dry
printing method (transfer printing) uses
dyes that sublime, use of this method
may transfer dye emissions from a water
medium to the atmosphere surrounding
the machine. Use of this method could
have a greater impact on worker exposure
than wet dyeing methods. In addition,
both plant visits conducted for this study
revealed that dye operations can, with
proper machine operation, achieve a very
high degree of dye exhaustion onto the
fabrics. Based on observations at the two
plants visited, this effort is already being
made to maximize the effective use of
dyestuffs and minimize the cost of dye
purchases.
Recommendations
Several areas were identified where in-
formation was incomplete or unavailable
on textile dyeing operations. In most in-
stances, the unavailable information was
nonexistent; obtaining it would require
detailed research efforts. In other in-
stances, the information was available,
but the database was incomplete or insuf-
ficient to establish reliable emis-
sion/release estimates and trends. The
areas of textile dyeing operations requiring
additional study are:
• Developing Information on Properties
of Dyestuffs —Most information
available on physical/chemical
dyestuff properties is general and
does not describe the properties of
specific large volume dyestuffs now
4
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in use. The use of chemical property
estimation techniques and/or actual
testing of specific dye substances
could develop detailed information in
this area. This effort could also be
enhanced by preparation of en-
vironmental fate and accumulation
estimates for the dyestuffs, using
recently published estimation
methods.
Characterizing the Size, Capacity,
and Dye Use of Textile Dyeing Opera-
tions—The most recent data available
was from EPA's Effluent Guidelines
Division and was about 6 to 10 years
old. Since that time, new dyes and
fabric combinations have replaced
older dyestuffs, fabrics, and
machines. This currently available in-
formation primarily focuses on textile
finishing operations, rather than dye-
ing operations. Additional data collec-
tion efforts could focus on textile
dyeing operations, rather than on tex-
tile finishing operations as past data
collection efforts did.
Developing Data on Worker Exposure
to Dyestuffs—Little information was
available in the literature on worker
exposure to dyestuffs, except for
benzidene-based dyes which have
been largely dropped from use by the
industry. Parameters to be considered
include: frequency, duration, and ex-
posure concentrations for workers.
No data were found to characterize
the type and concentrations of
volatilized dye or solvent emissions
from dry transfer printing operations
to the atmosphere or dyestuff
releases via the expended transfer
paper. This, as well as other batch
and continuous dyeing methods,
could be investigated with respect to
worker exposure.
Studying Advanced Wastewater
Treatment of Dyes—Much informa-
tion was available in the open
literature on wastewater treatment of
textile effluents. However, these data
did not focus on removing specific
dyestuffs by these technologies, nor
did they address the removal efficien-
cy of advanced technologies; e.g.,
reverse osmosis and hyperfiltration
for specific dyestuffs.
Investigating Multimedia Transfer of
Dyestuffs—Both existing and ad-
vanced candidate wastewater treat-
ment technologies produce waste-
water sludge or other liquid concen-
trates that must be disposed of. Vir-
tually no data were available for the
quantity of dyestuffs transferred to
the residual wastes from treatment of
textile dyeing wastewater.
Compiling Information on Dyeing of
Leather and Non-woven Textile Prod-
ucts—Data on these topics were
available, but were not a major focus
of this study.
Additional Plant Visits to Textile Dye-
ing Operations—Additional plant
visits to collect similar information
would broaden the data base for
plant operations and dyestuff release
estimates. This study investigated
only two plants; more such visits
would be useful in obtaining a
realistic profile of the textile dyeing
industry.
S. Kulkarni, C. Blackwell, A. Blackard, C. Stackhouse. andM. Alexander are with
Radian Corporation, Research Triangle Park. NC 27709.
J. S. Ruppersberger is the EPA Project Officer (see below).
The complete report, entitled "Textile Dyes and Dyeing Equipment: Classification,
Properties, and Environmental Aspects." (Order No. PB 85-173 771/AS; Cost:
$31.00, subject to change) will be available only from:
National Technical Information Service
5285 Port Royal Road
Springfield, VA 22161
Telephone: 703-487-4650
The EPA Project Officer can be contacted at:
Air and Energy Engineering Research Laboratory
U.S. Environmental Protection Agency
Research Triangle Park, NC27711
ftU.S.Government Printing Office: 1985 — 559-111/10819
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