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Environmental Protection Planning and Standards May 1995
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                      Hazardous Air Pollutant Emissions
I                         From Process Units in the
   ;                              Elastomer
• *                       Manufacturing Industry—
   r
                    (Supplementary Information Document
                           for Proposed Standards
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•                        Emission Standards Division
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                    U.S. Environmental Protection Agency
                                                             EPA-453/R-95-005a
                         Office of Air And Radiation
                 Office of Air Quality Planning and Standards
* r              Research Triangle Park, North Carolina 27711

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|                                May 1995

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                           DISCLAIMER

This report has been reviewed by the Emission Standards Division
of the Office of Air Quality Planning and Standards,  EPA, and
approved for publication.  Mention of trade names or commercial
products is not intended to constitute endorsement or
recommendation for use.
                                11

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                 ENVIRONMENTAL PROTECTION AGENCY



   Hazardous Air Pollutant Emissions from Process Units in the
 Elastomers Manufacturing Industry — Basis and Purpose Document
                     for  Proposed Standards
1.   The standards regulate organic hazardous air pollutant (HAP)
     emissions from the production of butyl rubber,
     epichlorohydrin elastomers,  ethylene-propylene elastomers,
     Hypalon™,  neoprene,  nitrile  butadiene rubber,  polybutadiene
     rubber,  polysulfide rubber,  and styrene-butadiene rubber and
     latex.   Only those elastomer product process units that are
     part of  major sources under section 112(d) of the Clean Air
     Act (Act)  will be regulated.

2.   For additional information contact:

     Mr. Leslie Evans
     Organic  Chemicals Group
     U.S. Environmental Protection Agency (MD-13)
     Research Triangle Park, NC  27711
     Telephone:  (919) 541-5410


3.   Paper copies of this document may be obtained from:


     U.S. Environmental Protection Agency Library  (MD-36)
     Research Triangle Park, NC  27711
     Telephone:  (919) 541-2777


     National Technical Information Service (NTIS)
     5285 Port Royal Road
     Springfield, VA  22161
     Telephone:  (703) 487-4650
                               ill

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                            OVERVIEW

     This Supplementary Information Document (SID) contains

memoranda providing rationale and information used to develop the

Polymers and Resins Group I Elastomers and Synthetic Rubbers

proposal package.  These memoranda were written by EC/R

Incorporated under contract to the U.S. Environmental Protection

Agency (EPA).  The data and information contained in these

memoranda were obtained through literature searches, industry

meetings, plant visits, and replies to section 114 letters sent

to industry.

     The memoranda included in this SID are referred to in the

Basis and Purpose Document and in the preamble to the proposed

rule.  These memoranda were compiled into this single document to

allow interested parties more convenient access to this

information.  The memoranda included herein are also available

from the docket  (Docket A-92-44).

     The memoranda included in this SID are listed below with

their document numbers.


  Document  No.                      Description


 II-B-21        C.  Clark and  P.  Norwood,  EC/R Inc.,  to  L.  Evans,
                EPA:ESD:OCG.   April 28,  1995.   Industry
                Characterization and Production — Elastomer
                Production Facilities  (Polymers and Resins I).

 II-B-22        P.  Norwood, EC/R Inc.,  to L.  Evans,  EPA:ESD:OCG.
                May 10,  1995.   Baseline Emissions  for Elastomer
                Production Facilities  (Polymers and Resins I).

 II-B-23        C.  Clark and  P.  Norwood,  EC/R Inc.,  to  L.  Evans,
                EPA:ESD:OCG.   May 10,  1995.   Subcategorization
                for the Elastomer Production Industry (Polymers
                and Resins I).

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Document No.                     Description


II-B-24       P. Norwood, EC/R Inc., to L. Evans, EPA:ESD:OCG.
              May  10,  1995.  MACT floors and Regulatory
              Alternatives for the Elastomers Production
              Industry (Polymers and Resins I).

II-B-25       C. Clark, EC/R Inc., to L. Evans, EPA:ESD:OCG.
              May  10,  1995.  Potential for New Sources
              Producing Elastomers (Polymers and Resins  I).

II-B-26       P. Norwood, EC/R Inc., to L. Evans, EPA:ESD:OCG.
              May  10,  1995.  Estimated Regulatory Alternatives
              Impacts  for Elastomer Production Facilities
              (Polymers and Resins I).

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I    E /R Incorporated
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                                   Environmental Consulting and Research
MEMORANDUM

Date:     April 28, 1995

Subject:  Industry Characterization  and Production — Elastomer
          Production Facilities  (Polymers  and  Resins I)
         From:      Charlotte Clark' and Phil Norwood\J EC/R


              The purpose of this memorandum is to describe the general
         production process for synthetic rubbers, or elastomers,  and  also
         to discuss production process variations found among the  nine
         specific elastomers included in the Polymers and Resins I source
         category grouping.  The majority of this memorandum was taken
         from a draft BID chapter prepared for the EPA/ESD by Radian
         Corporation under Contract No. 68D10117.  A discussion of
         emissions sources from each production process is included in
         this memorandum; a discussion of specific process emissions and
         baseline emissions (emissions nationwide prior to any NESHAP
         standard) will be provided in a separate memorandum entitled
         "Polymers and Resins I Baseline Emissions."

              An elastomer or synthetic rubber is a synthetic, polymeric
         material that can stretch to twice its original length and then
         return rapidly to approximately its original length when
         released.   Elastomers have long,  flexible, chainlike molecules
         that are able to undergo rapid rotation  (flex) as a result of
         thermal agitation.  During processing, intermolecular bonds form
         an insoluble, three-dimensional network.2  Elastomer production
         includes the production of latexes, because a latex is a  water
         emulsion of a synthetic elastomer.

         INTRODUCTION

              The Clean Air Act as amended in 1990  (1990 Amendments)
         required the U.S. Environmental Protection Agency (EPA) to
         publish a list of categories of sources emitting any of 189
         hazardous air pollutants (HAPs).  The Initial Source Category
         List contained 39 production categories for polymers and
         resins.    For regulatory development purposes, the EPA divided
         these 39 categories into 4 groups, which have been given  the
         names Polymers and Resins I-IV.  Each group represents a
         different family of polymer and resin products that have  similar
         production processes, product end use, air pollution emission
         characteristics, control device applicability.and costs,  and
         regulatory schedule requirements.   Nine polymer and resin
         products that belong to the family of "elastomers," or synthetic
         rubbers, and that have similar production and air pollution
                        3721-D University Drive • Durham, North Carolina 27707
                          Telephone: (919) 493-6099 . Fax: (919) 493-6393

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emission characteristics were grouped together in the Polymers
and Resins I Group.  For the purpose of this regulatory effort,
these nine source categories are collectively referred to either
as Group I Polymers and Resins or as the elastomer source
categories.   Because these nine production categories have
significant similarities, they are being considered together for
regulation in the development of National Emission Standards for
Hazardous Air Pollutants (NESHAP) for Elastomer and Synthetic
Rubber Production.  The Polymers and Resins I source category
group is listed to propose regulations by May of 1995 and to
promulgate regulations by May of 1996.

     The nine source categories for the production of elastomers
are listed below:
               Butyl Rubber Production;
               Epichlorohydrin Elastomers Production;
               Ethylene-propylene Elastomers Production;
               Hypalon™ Production;
               Neoprene Production;
               Nitrile Butadiene Rubber Production;
               Polybutadiene Rubber Production;
               Polysulfide Rubber Production; and
               Styrene-Butadiene Rubber and Latex Production.

     The majority of the products from these nine source
categories are used in the tire and tire products industry.
Table 1 shows specific end uses of the nine elastomers discussed
in this memorandum.

     Within three of the nine elastomer production categories,
significant variations in manufacturing processes and air
pollution emissions exist.  Therefore, the EPA has further
divided these three categories  -- butyl rubber, nitrile-butadiene
rubber, and styrene-butadiene rubber  -- into subcategories for
the purposes of  regulation in this NESHAP.  The technical basis
of these subcategorization decisions  is described in a  separate
memorandum entitled "Polymers and Resins I  -- Subcategorization."

     Table 2 lists the nine elastomer source categories, and
provides facility  locations, annual production capacities, and
the percentage of'the total United States capacity manufactured
by each facility for each elastomer type.   The elastomers with
the greatest production  rates are styrene-butadiene  rubber and
latex, polybutadiene rubber, and ethylene-propylene  rubber.
Figure I shows the geographical distribution of the  elastomer
manufacturing facilities in the U.S.   The majority of  the
elastomer manufacturing  facilities  in the nine Polymers and
Resins I source  categories are  located in Texas,  Louisiana, Ohio,
and Kentucky.

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                       Table 1.   Major End Uses of Elastomer Products
            Elastomer
  Butyl Rubber,'
  Epichlorohydrin rubber, *
  Ethylene-propylene rubber,'
  Hypalon™,'
  Neoprene,e
  Nitrile butadiene rubber and latex.
  Polybutadiene rubber and latex, *
  Polysulfide rubber, h
  Styrene-butadiene rubber and latex, '
                                                           Major End Uses
Tires, tubes, and tire products; automotive and mechanical goods; adhesives,
caulks, and sealants; pharmaceutical uses.
Because of excellent oil and heat-resistant properties, widely used in seals,
gaskets, hoses, belting, and coatings.  Especially useful in automotive industry
where heat, ozone, and oil resistance is necessary.
Construction; automotive (radiator & heater hoses, weather stripping, gaskets,
body & chassis parts; plastic blending; oil additives; industrial; wire and cable.
Used in place of standard elastomers where superior resistance to oil, ozone,
and heat is needed.
Industrial; mechanical; adhesives; latexes; wire and cable; cellular rubber;
consumer products (including shoe soles, wet suits, and elastic swimwear).
Hoses, belting, and cable; o-rings and seals; latex; molded/extruded products;
adhesives and sealants; sponges; footwear.
Tires and tire products; high impact resin modifiers; industrial products
(conveyor belts, hoses, seals, and gaskets).
Insulating glass, construction, aircraft fuel tanks, concrete coatings, bindings
Tires and tire related products; mechanical goods; automotive; floor tiles, shoe
soles.
' Butyl Elastomers.  In:   Chemical Economics Handbook.  SRI, International.  February
 1989.
b Epichlorohydrin.  In:  Encyclopedia of Polymer Science  and Engineering.  Second Edition.
 1985.
c Ethylene Propylene Elastomers.  In:  Chemical Economics Handbook.  SRI International.
August  1990.
d Kirk-Othmer Concise Encyclopedia of Chemical Technology.  New York, John Wiley &
Sons.  1985.  p. 392.
e Chemical Profile of Polychloroprene.   Chem Market Rep.  May 13,  1991.
f Chemical Profile of Nitrile Rubber. Chem Market Rep.  May 20,  1991.
g Chemical Profile of Butyl Rubber. Chem Market Rep.  April 15,  1991.
h Polysulfides.  In:  Encyclopedia of Polymer Science and Engineering.  Second Edition.
Vol.  13.  1985.
1 Chemical Profile of Styrene-Butadiene  Rubber.  Chem Market Rep.  May 27,  1991.

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DESCRIPTION OF ELASTOMER PRODUCTION AND EMISSION POINTS

     A simplified process flow diagram of the polymerization
process used to manufacture elastomers and synthetic rubbers is
provided in Figure 2.  In polymerization, a large number
(hundreds to thousands) of relatively simple molecular units, or
monomers, are chemically combined to form a-macromolecule, or
polymer.

     For the purposes of this memorandum, the polymer
manufacturing process will be divided into four process areas .-
(1) raw material storage and refining,  (2) polymer formation in a
reactor,  (3) stripping and material recovery, and  (4) finishing.
Each of these areas is described briefly in this section; the
subsequent sections describe the variations from this generic
process that are needed to manufacture each of the elastomers
products in the nine Polymer and Resins I source categories.

Raw Material Refining

     The basic raw materials for polymerization are monomers and
either organic solvents or water.  In raw material refining,
reaction inhibitors and impurities (e.g., residual undesired
chemicals) are removed from the monomer and solvents.  This
refinement is commonly achieved through the use of steam
distillation.  Because this adds water to the raw materials, and
because in certain types of polymerization reactions, water fouls
the polymerization process, a process to dry the refined monomers
and solvents must sometimes be added.  A water adsorption column
is commonly used to dry the materials in these instances.

Polymer Formation in a Reactor

     In this step, monomers and either organic solvents or water
are charged to a reactor.  Additives, such as catalysts and
modifiers, are also added at this step.  Two types of
polymerization are generally used in  the elastomers manufacturing
industry:  solution and emulsion.  In solution polymerization,
monomers are dissolved in an organic  solvent, while in emulsion
polymerization, monomers are dispersed  in water using a soap
solution, or an "emulsifier."  A third,  less common type  of
polymerization sometimes used is the bulk process, in which one
of the monomers acts as the solvent.

     The reactor is a  large vessel in which  the temperature and
pressure are controlled and the contents are well  mixed to
optimize the polymerization reaction.  After the desired  degree
of polymerization has  been achieved,  the reaction  is terminated
with a  chemical shortstopping agent,  such as
diethylhydroxylamine.

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Stripping and Material Recovery

     Because the complete conversion of monomers to polymer
chains is usually not obtained, unreacted monomer remains in the
product following polymerization.  In addition, if a solution
process is used, organic solvents remain in the product, because
they do not participate in the reaction.  Therefore, the reactor
contents are sent to a stripping operation following
polymerization to recover product, unreacted monomers,  and, if a
solution process is used, solvent.  This is usually accomplished
using steam distillation.  Stripping of the polymer both enhances
product quality and facilitates recycling of monomer and/or
solvent.  Consumers of a polymer may specify the residual
concentrations of monomer and solvent in the product.

     Material recovery consists of removing relatively pure
organic components from stripping operations vent streams.
Typically, condensers are used to remove water vapor by reducing
the temperature of the vent stream, and decanters then separate
the condensed liquid into organic and water phases.  In solution
processes, agglomeration of product from the solution,  or
coagulation, is considered part of the stripping and material
recovery operations.  The steam that is used to strip residual
monomers and solvent also acts to coagulate the polymer.  In
emulsion processes, coagulation is considered finishing, and is
therefore included in the next section.

Finishing Operations

     Finishing operations consist of blending, aging, coagulation
 (in emulsion processes), washing, and drying processes, depending
on the ultimate use of the polymer.  If the final polymer product
is a latex emulsion, finishing operations are not required after
coagulation.  Blending involves addition of materials,  such as
anti-oxidants and extending oils, to enhance product quality.
The aging process involves slow agitation of the polymer to allow
off-gassing of residual compounds and to stabilize  the latex.

     In coagulation, product is agglomerated from the emulsion of
polymer particles by adding an acid-brine solution.  (As noted
above, coagulation of solution processes is considered a part of
stripping and material recovery.)  Following coagulation, the
polymer product is separated from the water and acid-brine slurry
by filtration, washed to remove any remaining  acid-brine
solution, and dewatered again.

     Drying of the polymer involves removing residual moisture
remaining after the washing operation.  This is commonly
accomplished through the use of dewatering screens  followed by
extrusion and/or hot air dryers.

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                                10

Elastomer Production Emission Points

     There are four types of HAP emission sources commonly found
at elastomer production facilities:  storage and material
handling, equipment leaks, process operations,  and waste and
wastewater collection and treatment operations.

Emissions from Storage and Material Handling

     Different types of tanks are used to store various types of
raw materials, products, and co-products, depending on the vapor
pressure of the chemical.  Table 3 presents vapor pressures of
HAP compounds that are associated with the production of the
elastomers identified in this memorandum.  Those chemicals with
vapor pressures greater than 14.7 pounds per square inch at
atmospheric pressure  (psia)  (gases) are stored in pressurized
vessels that are not vented to the atmosphere during normal
operations.  Liquids  (chemicals with vapor pressures of 14.7 psia
or less) are stored in horizontal, fixed roof,  or floating roof
atmospheric tanks, depending on the chemical properties and
volumes to be stored.  Liquids with vapor pressures less than
14.7 psia but greater than 11 psia are typically stored in fixed
roof tanks that are vented to a control device.4  Volatile
liquids with vapor pressures less than 11 psia are usually stored
in floating roof tanks because  floating roof tanks have lower
emission rates than fixed roof  tanks within this vapor pressure
range.

     Emissions from atmospheric storage tanks typically occur as
working losses.  As a storage tank is filled with chemicals,
volatile organic compound  (VOC) laden vapors inside the tank
become displaced and  can be  emitted to the atmosphere.  Also,
diurnal temperature changes  result in breathing losses of VOC-
laden vapors  from atmospheric storage tanks.4

     Residual concentrations of HAP are usually very low  in
finished elastomer products  (less  than 1 percent).  However,
because of the large  volumes of finished elastomer produced, HAP
and VOC emissions can still  occur  from raw and  final product
storage  tanks, especially during product handling as a result of
agitation, splashing, and contact  with air during pneumatic
transfer of dried elastomer  product.

      Emissions of HAP from storage tanks may be vented directly
to the  atmosphere or  to control devices.  Condensers can  be used
to recover vapors from  vent  streams before discharge to the
atmosphere.   Combustion of the  vent stream in  a flare is  another
method  of reducing HAP  emissions  from storage  tanks.

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Table 3. Vapor Pressure of Compounds
Production*



Compound
Acrylonitrile
1,3 -butadiene
Carbon tetrachloride
Chlorobenzene
Chloroform
Chloroprene
Ethylene dichloride
Ethylene oxide
Epichlorohydrin
Hexane (n-Hexane)
Methyl chloride
Methylene chloride
Propylene oxide
Styrene
Toluene
* Lange. Handbook of Chemistry. 13th Edition, p.








Associated With Elastomer



Vapor pressure @ 20° C
(psia)
1.74
34.72
1.76

3.34
1.20

0.19
2.35
72.03


0.09
0.42
10-28 and following.


I

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                                12

Emissions From Equipment Leaks

     Equipment leaks are continuous releases of process fluid or
vapor from process equipment.  These releases occur primarily at
connections between components of equipment.5  Emissions  from
pump seals, compressor seals, pipe flanges, valves, pressure
relief devices, sample connections, and open-ended lines are
collectively called equipment leaks.  The characteristics of
these emissions for the polymers and resins industry are similar
to those associated with the Synthetic Organic Chemical
Manufacturing Industry  (SOCMI) and are thoroughly discussed in
the Hazardous Organic NESHAP  (HON); therefore, they will not be
discussed in this memorandum.4  Emissions  from equipment  leaks
associated with operations downstream from coagulation equipment
will be minimal due to low residual VOC and HAP content in the
streams.

     Equipment leak emissions are usually controlled by leak
detection and repair  (LDAR) procedures.  Leaking components are
identified, using an organic vapor analyzer or by inspection, and
repaired or replaced.

Emissions From Process Operations

     Process operations associated with elastomer production that
may be HAP emission sources  include vents and fugitives from
monomer refining, polymerization, monomer stripping, material
recovery, finishing, and drying operations.

     Emissions from the reactors in the polymerization area
result from initial charging  of the reactants and/or from
pressure relief, which may occur during the polymerization
reaction.  These emissions may be  steady or  sporadic depending  on
the mode of process operation, and generally  comprise monomer(s)
and solvent.  The HAP concentration in reactor emissions can be
relatively high due to  the high concentrations of unreacted
monomer and solvent present  in the reactor.   Reactor emissions
are vented through pressure  relief valves and are  typically
controlled by  combustion in  a flare.
                  \
     While most of the  monomer  stripping and material recovery
operations are not vented  to the  atmosphere,  the decanters used
in these processes for  separating  organic  liquids  from water may
be open to the atmosphere, resulting  in emissions  of monomer(s)
and solvent.   Compressors, condensers, and distillation  columns
are used to refine the  organic phase  from  decanters.  Varying
configurations of these components may be  used depending on  the
physical characteristics of  the materials  being recovered  and  the
economics  of  the  situation.   Because  the  recovery  of materials  is
not complete,  some vapor emissions of noncompressible or
noncondensible gases  (NCG's)  occur.   These gases often  contain

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residual HAP concentrations.  The NCG streams may be flared if
they are a significant emission source.  These emissions can be
batch emission but are usually continuous.

     Emissions of HAP from vents associated with stripping and
material recovery operations are typically flared or incinerated.
These vent streams usually have higher HAP concentrations
relative to vents from other processes that take place downstream
from the stripping/recovery operations.

     Finishing area operations may also be vented to the
atmosphere.  Emissions can be associated with the coagulation
tanks, slurry or blending tanks, and dewatering screens and
filters.  Since the polymer has previously been stripped of VOC,
the concentration of HAP in the product is much lower than during
polymerization, stripping, or recovery operations; therefore, HAP
concentrations in finishing area vent streams will also be much
lower than the concentrations in reactor or stripper vent
streams.  Finishing area and dryer vents are generally
uncontrolled, although combustion of the finishing area vent
streams is practiced by some facilities.

     Vents associated with drying are usually open to the
atmosphere, and are often the largest source of process vent
emissions from elastomer production.  These vents are
characterized by low HAP concentrations, but very large
volumetric flow rates  (e.g., 5 to 10 parts per million by volume
 (ppmv) HAP in 10,000-standard cubic feet per minute  (scfm) vent
stream).  The elevated temperatures encountered in the dryers may
increase the volatility of residual monomers and solvents that
were not removed in the previous processing steps, and this may
cause them to be emitted during drying operations.

Emissions From Wastewater Streams

      In the manufacture of some elastomers, wastewater streams
containing organic compounds are generated.  Sources of
wastewater containing HAP include the monomer refining,
stripping, material recovery, and finishing processes, with the
largest wastewateri generation associated with the finishing
process.  No wastewater is produced in the drying operations.
Specifically, sources of wastewater include:  water used as a
medium  in a process; water used to wash impurities from reactants
and elastomer products; water used to  cool organic vapor streams,-
condensed steam from stripping  and material recovery operations
containing organics,- and non-contact wastewater contaminated
through equipment leaks  (i.e.,  runoff).   Potential sources of HAP
emissions associated with wastewater collection and  treatment
systems include drains, manholes, trenches, surface  impoundments,
oil/water separators, storage and treatment tanks, junction
boxes,  sumps, and basins.4  Organic compounds in the wastewater

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                               14

can volatilize and be emitted to the atmosphere from these
wastewater collection and treatment units if these units are open
or vented to the atmosphere.

     Control of HAP emissions from wastewater can be accomplished
by reducing the contact between wastewater and the atmosphere.
This can be done by covering the collection system and venting
the vapors to a control device.  The most effective method to
reduce potential for atmospheric emission is reducing the HAP
concentration in the wastewater.   Carbon adsorption, steam, and
air stripping can be used to reduce the HAP concentration in
wastewater.  Process modification may prevent the HAP from being
discharged to wastewater.

PRODUCTION PROCESSES FOR SPECIFIC ELASTOMERS SOURCE CATEGORIES

     The following sections define each of the nine elastomer
source categories and describe the specific production process.
The definition of each elastomer has been taken from the Source
Category List.6

Butyl Rubber Production

     The Butyl Rubber Production source category includes any
facility that manufactures copolymers of isobutylene and
isoprene.  A typical composition of butyl rubber is approximately
97 percent isobutylene and 3 percent isoprene. Butyl rubber is
very impermeable to common gases and resists oxidation.  Table 1
summarizes major end uses of butyl rubber.

     Modified, derivative, and halogenated copolymers and latexes
are also included in this source category.  Halogenated butyl
rubbers are specialized butyl rubbers that are produced
commercially by dissolving butyl rubber in hydrocarbon solvent
and contacting the solution with gaseous or liquid  elemental
halogens,  such as chlorine or bromine.  Halogenated butyl rubber
resists aging to a higher degree than the nonhalogenated type,
and is more compatible with other types of rubber.7

Process Description for Butyl Rubber Production
                  \
     A general process flow diagram for butyl rubber production
is shown in Figure 3.   Butyl rubber is typically made by a
solution polymerization process in which isobutylene and isoprene
are copolymerized in methyl chloride solvent.  One  U.S. facility
was identified that actively produces butyl rubber.  High vapor
pressure necessitates that isobutylene monomer and  methyl
chloride solvent be stored in pressure vessels,  although isoprene
monomer may be stored in  atmospheric tanks.  Because this  is  a
solution process, the monomers are sent from storage through
drying towers  to remove  any water  from these feed  streams.

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                                16

     The dried isoprene and isobutylene are chilled and then
mixed in a feed blend tank.  Methyl chloride (a HAP) is blended
with a catalyst, aluminum chloride, in a separate feed tank.  The
monomer feed streams are chilled, so that the reaction occurs at
a very low temperature  (-100 to -90°C).  The monomers are
combined with the methyl chloride and aluminum chloride mixture
in a reactor.

     The resulting slurry is transferred from the reactor into an
agitated tank (or several tanks in series), where steam and hot
water are added to the stream to coagulate the polymer and strip
the residual solvent and unreacted monomers.8  Because the
pressure is reduced and the temperature increased in this step,
methyl chloride, unreacted isobutylene, and steam flash from the
slurry as an overhead vapor.  The overhead vapor is sent through
compressors and adsorption columns to separate methyl chloride
and water from isobutylene.  The isobutylene stream is refined
and recovered for recycle back to the reaction process.  The
methyl chloride is distilled from water and any other
contaminants (e.g., short-chain oligomers) , and recycled to the
feed blend tank as solvent.

     The butyl rubber leaves the stripping area in a water slurry
and is passed through dewatering screens and a hot air dryer to
remove most of the water.  After drying, the rubber is then
extruded and sent to final packaging.  All process steps after
the stripping area are open to the atmosphere.

Process Description for Halogenated Butvl Rubber Production

     A general flow diagram for producing halogenated butyl
rubber is shown in Figure 4.  The production of halogenated butyl
rubber  (halobutyl) is also a solution process.  One facility was
identified that actively produces halogenated butyl rubbers
 (bromobutyl and chlorobutyl rubbers) in the U.S.  Production of
halogenated butyl rubber varies  from butyl rubber production only
in that, prior to stripping, the solution of polymer  in an
organic solvent is contacted with  an elemental halogen, usually
gaseous or liquid chlorine or bromine.  Specifically,  the methyl
chloride solution ,of the butyl polymer is first transferred from
the reactor into a solvent replacement process where methyl
chloride is removed and hexane  (another HAP) is added.  This new
solution of butyl polymer  in hexane is then  fed to  the
halogenation step, which occurs  rapidly as a free radical
substitution.

     After halogenation, the hexane is stripped from  the  polymer
using steam and reduced pressure.  The overhead stream (hexane
and steam) is processed to separate the hexane for  recycle;  the
water is discharged.  Coagulation  takes place  in  the  stripper.
After coagulation, the  polymer  is  held in slurry  tanks.   The
polymer is dried by extrusion and  sent to packaging.

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                               18
HAP and HAP Emission Points For Butyl Rubber Production

     Methyl chloride is the prime HAP emitted from production of
butyl rubber.  Production of halogenated butyl rubber also emits
hexane in addition to methyl chloride.  Table 4 identifies
potential HAP emission sources from butyl rubber (including
halogenated butyl rubber) production.  Emissions of HAP from
pressurized storage tanks are negligible.  Emissions from fixed
roof tanks may vent directly to the atmosphere or to a control
device.  Emissions from the reactor vents during polymerization
are low due to the very low reaction temperature of the butyl
rubber polymerization process.  Stripping area emissions are also
low, because vapor streams from these process units are routed to
the material recovery area.  However, during maintenance of the
material recovery process area, vapor streams from stripping
operations are emitted directly to the atmosphere.  The finishing
operations and the dryer are significant sources of either methyl
chloride or hexane emissions directly to the atmosphere.  In
halobutyl rubber production, the solvent replacement step is a
potential source of methyl chloride emissions.

     Sources of wastewater containing HAP include material
recovery and finishing operations, as well as rainwater runoff
from butyl rubber manufacturing processes.  The methyl chloride
distillation column and separation of methyl chloride from
isobutylene are sources of methyl chloride to wastewater.  The
finishing area wastewater discharges are also likely to contain
methyl chloride, although less than the other streams.
Wastewater from rainwater runoff can contain HAP, although this
is not a significant source.  The discharge of HAP in rainwater
runoff primarily depends on the location of the processes  (i.e.,
which operations occur outside in uncovered areas) and general
housekeeping practices  (e.g., cleanup of leaks and spills).

Epichlorohydrin Rubber Production

     The Epichlorohydrin Rubber Production source category
includes any facility that polymerizes or copolymerizes
epichlorohydrin  CEPI) to form elastomers.  The main products of
this source  category are polyepichlorohydrin, epi-ethylene oxide
 (EO) copolymer, epi-allyl glycidyl ether  (AGE) copolymer, and
epi-EO-AGE terpolymer.

     Elastomers based on EPI are important commercial products
because when vulcanized  they are heat resistant,  fuel and oil
resistant, ozone resistant, and have  a low temperature
flexibility.   In addition,  they provide  excellent resistance  to
vapor  permeation by hydrocarbons,  fluorocarbons,  and  air.9  Table
1  summarizes major end uses of epichlorohydrin rubber.

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          	Methyl Chloride	Hexane"
           Storage and Handling                            X                      X
I                     Table 4.  Potential Sources of HAP Emissions From Butyl and
                                      Halobutyl Rubber Production

I

          Equipment Leaks                                X                       X
•        Process Vents
             Monomer Refining
I           Polymerization                               X                       X
             Stripping
•           Material Recovery                            X                       X
             Finishing                                    X                       X
I           Drying                                      X  .                     X
          Wastewater
•           Monomer Refining                            X                       X
             Polymerization
J           Stripping
             Material Recovery                            X
|           Finishing                                    X
             Drying	
          •  Hexane is only emitted from halobutyl rubber production.

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                                20

Process Description for Epichlorohydrin Rubber Production

     A general process flow diagram for epichlorohydrin rubber
production is shown in Figure 5.   Epichlorohydrin rubber is
produced by a solution polymerization process.  One facility in
the U.S. was identified that actively produces epichlorohydrin
rubber.

     Epichlorohydrin  (EPI) monomer is a HAP,  and is generally
stored in fixed roof atmospheric tanks.  Toluene, which is also a
HAP, is the solvent most commonly used to polymerize EPI, and is
typically stored in fixed roof tanks at atmospheric pressure.  If
comonomers, such as ethylene oxide and propylene oxide, are used
in the polymerization reaction, they are stored under pressure.

     Dry epichlorohydrin is combined in a reactor with a catalyst
and solvent, and in some cases, with comonomers.  The catalyst
typically used is a mixture of a trialkylaluminum compound,
water, and acetylacetone.  After polymerization, the reactor
contents are transferred to a coagulation tank.  In the
coagulation tank, molecules in the rubber solution are cross-
linked by adding difunctional reagents that react with the
chloromethyl groups and release hydrochloric acid as a byproduct.
Coagulation is then completed by adding a hot caustic solution to
neutralize the hydrochloric acid.

     Following coagulation, the rubber is steam  stripped to
remove any unreacted  epichlorohydrin and solvent, which are
recovered from the condensed steam overheads by  distillation.
Recovered monomer and solvent are sent back to raw material
storage.  After the material recovery operations, the rubber is
dewatered, dried, and sent to packaging.

HAP and HAP Emission  Points For Epichlorohydrin  Rubber Production

     The potential HAP emission sources for epichlorohydrin
production are shown  in Table 5.  Emissions of HAP from  fixed
roof atmospheric tanks  (epichlorohydrin and toluene) may vent
directly to the atmosphere or to a control device.  Pressurized
storage vessels have  negligible HAP emissions  (ethylene  and/or
propylene  oxide).' The emissions from  the reactor vents
 (polymerization) contain  epichlorohydrin monomer and solvent,
which  is typically toluene.  The vents from the  material recovery
stripper may  contain  small amounts of  epichlorohydrin  and
toluene.   Small amounts of toluene will also  be  emitted  from the
dryer  vents.

     Sources  of wastewater containing  HAP include the
coagulation,  material recovery, and polymer dewatering
operations, as well as rainwater runoff from  the epichlorohydrin
production facility.  Wastewater from  the coagulation  process
 (polymerization) will contain unreacted monomer and toluene.   The

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                            22
Table 5.  Sources of HAP Emissions From Epichlorohydrin Rubber

Storage and Handling
Equipment Leaks
Process Vents
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying
Wastewater
Monomer Refining
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Stripping
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Finishing
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wastewater from the stripping operations will contain small
amounts of monomer and solvent.  Some monomer and solvent will
also be present is the wastewater from the dewatering operations.
Runoff from the elastomer production areas may contain monomer
and solvent as well, depending on the facility's design and
housekeeping practices.

Ethylene-Propylene Rubber Production

     The Ethylene-Propylene Rubber Production source category
includes any facility engaged in the production of
ethylene-propylene copolymers or ethylene-propylene terpolymers.
Ethylene-propylene copolymers  (EPM's) result from the
polymerization of ethylene and propylene and contain a saturated
chain of the polymethylene type.  The production of EPM accounts
for 20 percent of current ethylene propylene elastomer
production.  The EPM polymer does not contain any double bonds,
and therefore, cannot be vulcanized.10  Where a vulcanized
product is needed, a diene monomer is added to the reaction
sequence to make .a ethylene-propylene diene monomer  (EPDM).  This
is sometimes termed a terpolymer.  Both EPM and EPDM can be made
by continuous solution polymerization, through the suspension
process, or by bulk polymerization in a propylene slurry
 (therefore, this is sometimes termed "slurry" polymerization).
Because no facilities were identified that actively use the bulk
process, only the former two production processes are described
below.11  Table 1 summarizes major end uses of ethylene-propylene
rubber.

Process Description for Ethylene-Propylene Rubber Production by
Solution

     A general process flow diagram for solution polymerization
of EPM and EPDM is shown in Figure 6.  Four facilities were
identified in the U.S. that actively produce EPM and EPDM by the
solution process.

     Solution polymerization of EPM is a process where the
ethylene and propylene monomers are compressed to liquid form  and
combined in the reactor with the catalyst and solvent.  The
monomers and solvent, which is most commonly hexane  (a HAP), are
mixed  in a pressurized, back-flow, stirred reactor.  The polymer-
solvent solution is pumped from the reactor through an in-line
mixer.  In the mixer, a shortstopping agent is added to curtail
further polymerization and water is added to begin coagulation.

     Next, the mixture of water, solvent, unreacted monomer, and
polymer is transferred to a decanter where the water is removed.
The mixture is then pumped through another in-line mixer where
antioxidant, and sometimes extender oil, is added.  This mixture
is then processed in a steam stripper to flash off the solvent
and any unreacted propylene, and to complete polymer coagulation.

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                    24
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(The conversion of ethylene to polymer is almost 100 percent, so
that ethylene recovery is not economical.)    The overhead vapor
is compressed, condensed, and distilled to separate the
propylene, solvent, water, and other impurities (e.g.,
oligomers).   The recovered propylene and solvent are recycled for
reuse.  The water and other impurities are discharged as waste or
wastewater.   The stripped, coagulated polymer is dewatered,
dried, extruded, and then baled.

     Manufacture of EPDM follows the same process described
above, except that a diene monomer, most commonly ethylidene
norbornene,  is combined with ethylene and propylene in the
reactor.  Other monomers that can be used include 1,4-hexadiene
or dicyclopentadiene. The diene monomer is recovered in the
distillation steps that follow steam stripping.

Process Description for Ethylene-Propylene Rubber Production by
the Suspension Process

     Only one facility in the U.S. was identified that uses the
suspension polymerization process to manufacture ethylene-
propylene rubber.  In the suspension polymerization process,
rubber is actually suspended in rather than dissolved in the
solvent as in the solution process.12  No coagulation step is
needed, because the solvent is simply washed off the rubber.

     Suspension polymerization uses a boiling liquid reactor
design with liquefied monomer as the autorefrigerant ,13  A
mixture of cyclohexane and toluene is used to dissolve the
catalyst prior to injection into the reactor(s).  Suspension
reactors  operate at relatively high pressures and low
temperatures.

HAP and HAP Emission Points For Ethylene-Propylene Production

     The potential HAP emission sources from EPM and EPDM
production by the solution process are shown in Table 6.
Emissions of HAP such as hexane from fixed roof atmospheric
storage tanks may vent directly to the atmosphere or to a control
device.   Emissions, from  the reactor vents will contain hexane,
and distillation column vents will also be a source of solvent
emissions during material recovery.  Vents associated with
dewatering, drying, and  extrusion processes will emit solvent,
although  the  concentration of solvent in the vent streams will be
lower because polymer has previously been through stripping
operations.

     Wastewater discharges that may contain HAP include the
decanter  between the in-line mixers, the water from  the post-
stripping area distillation processes, the dewatering screens,
and the extruder.

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                                        26
          Table 6.  Sources of HAP Emissions From Ethylene-Propylene Rubber
                        Production By Solution Polymerization1

                                          Methylene Chloride             Hexane
 Storage and Handling                               X                       X
 Equipment Leaks                                   X                       X
 Process Vents
    Monomer Refining                              X
    Polymerization                                  X                       X
    Stripping
    Material Recovery                               X                       X
    Finishing                                       X                       X
    Drying                                         X                       X
 Wastewater
   Monomer Refining                               X
   Polymerization
   Stripping                                        X                      X
   Material Recovery                               X                      X
   Finishing                                        X                      X
   Drying
* These are two possible solvents for the production of these processes.  Both solvents are
unlikely to be used concurrently.

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     Emissions of HAP from the suspension process are generally
less than from the solution process,  because although the
suspension process solvent does contain a HAP (toluene),  the
dryer emissions are much lower because the rubber is not
dissolved in the solvent.12  Further,  the hexane used in the
solution process is a high boiling material relative to the
monomers and has a greater ability to solvate the polymer/
therefore, it is more difficult to completely remove from the
polymer prior to finishing.13  This also leads to higher emissions
from the solution process compared to the suspension process.

Hypalon™ Production

     The Hypalon™ Production source category includes any
facility that produces a group of elastomers made of
chlorosulfonated polyethylene, or Hypalon™.  Hypalon™ is produced
by reacting polyethylene with chlorine and sulfur dioxide,
transforming the thermoplastic polyethylene into a vulcanizable
elastomer.  Hypalon™ offers superior resistance to oil,  ozone,
and heat compared with other elastomers and is used for wire and
cable insulation, shoe soles and heels, automotive components,
and building products.14  Table 1 summarizes major end uses of
Hypalon™.

Process Description for Production of Hypalon™

     A general process flow diagram for Hypalon™ production is
shown in Figure 7.  As described below, although a solvent is
used in this process, it is not a true polymerization solution
reaction, because the raw material, polyethylene, is a polymer,
not a monomer.  One facility in the U.S. was identified that
actively produces Hypalon.  Production of Hypalon is conducted in
a solvent reaction medium, which is usually carbon tetrachloride
 (a HAP), but can be chlorobenzene, chloroform, methylene chloride
 (also all HAP), or other similar compounds.

     The chlorine used in manufacturing Hypalon™ is stored under
pressure.  Carbon tetrachloride solvent is generally stored in
fixed roof atmospheric tanks.

     To produce Hypalon™, a free radical initiator and
polyethylene pellets are dissolved in an organic solvent inside a
reactor.  Chlorine and sulfur dioxide gases  (or sulfurylchloride)
are also added to the reactor.  Because polyethylene is a
polymer, the reaction to produce Hypalon™ is considered a
substitution reaction by free radical chemistry.  After the
reaction is completed, the unreacted gaseous chlorine and sulfur
dioxide are recovered from the reactor by vacuum.

     Subsequent to the reactor, stripping and drying operations
are combined into one operation.  The mixture exiting the reactor

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          28
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is fed over two rotating drums that are heated by steam.  The
heat volatilizes the dry solvent from the polymer as the dry
product is formed; the solvent is vented to material recovery
operations.  Two vapor streams are generated -- one that is low
concentration and one that is high concentration.  The high
concentration stream is compressed, condensed, and recycled as
solvent.  The low concentration stream is passed through a carbon
adsorption column, which generates a solvent-rich stream upon
regeneration (by steam),  which is distilled to generate a
recyclable solvent stream, water (which is discharged),  and
hazardous waste (which is incinerated).  The recovered solvent is
condensed and returned to solvent storage.  The rubber product is
drawn into ropes,  cut, and sent to product packaging.

HAP and HAP Emission Points For Hypalon Production

     Potential emissions of HAP from Hypalon™ production are
shown in Table 7.   Emissions of HAP from pressurized vessels are
negligible.  Emissions of solvent from fixed roof storage tanks
may be vented directly to the atmosphere or to a control device.
Chlorine gas and solvent may be emitted from vents associated
with venting the reactor.  Low solvent emissions are expected
from the blending tank and filter vents.

     The majority of HAP emissions  (chloroform and carbon
tetrachloride)  come from the material recovery operation vents.
Chloroform is generated during the substitution reaction.  The
distillation column is the only source of wastewater that may
contain HAP.

Neoprene Rubber Production

     The Neoprene Production source category includes any
facility that produces polychloroprene, or Neoprene, by
polymerization of chloroprene  (2-chloro-l, 3-butadiene).  The
specific physical properties of Neoprene rubber depend on the
compounding ingredients and processes used on the raw
polychloroprene after it is produced.  Neoprene resists
oxidation, heat, oil, and flame.  Table 1 summarizes major end
uses of Neoprene rubber.

Process Description for Production of Neoprene Rubber and Latex

     A general process flow diagram for the production of
Neoprene by the batch emulsion process is shown  in Figure 8.
Neoprene is generally produced by a free radical emulsion process
in  the presence of elemental sulfur using a batch type of
operation.  Three facilities were  identified  in  the U.S. that
actively produce Neoprene rubber and  latex.  Although other
methods may be used, no active facilities have been identified
that do not use the conventional emulsion process.

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                                        30
                 Table 7.  Sources of HAP Emissions From Hypalon*
                      (Chlorosulfonated Polyethylene) Production
                                                  Carbon
                                   Cl,         Tetrachloride         Chloroform
Storage and Handling                 X               X
Equipment Leaks                     X               X
Process Vents
   Monomer Refining
   Polymerization
   Stripping
   Material Recovery                 XX                   X
   Finishing
   Drying                                           X                   X
Wastewater
   Monomer Refining                                X
   Polymerization
   Stripping
   Material Recovery                                X                   X
                      i
   Finishing
   Drying

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                               32

     Comonomers such as 2,3-dichloro-l,3-butadiene and
2,3,4-trichloro-l-butene may be polymerized with chloroprene  (a
HAP)  to produce desired properties of the rubber product.   These
comonomers are typically produced from chlorine (a HAP) and a
fraction of the refined chloroprene stream,  and are refined at
the Neoprene production facility in a complex series of reaction,
separation, and purification steps.  Chloroprene and comonomers
are typically stored in fixed roof atmospheric tanks.   Before
being sent to the reactor,  polymerization inhibitors and
impurities are removed by steam distillation.

     The prepared monomers, modifiers, and any comonomers are
emulsified with an alkaline-rosin soap,  and are charged to the
reactor.  Catalyst and the appropriate amount of elemental
sulfur, determined by the desired polymer chain length, are also
added to the reactor.  The temperature in the reactor is
controlled by the circulation of cold brine through a water
jacket surrounding the reactor.  The extent of monomer conversion
can be monitored by changes in the specific gravity of the
reactor contents.  At the desired conversion  (between 70 and
90 percent), a shortstop (usually tetraethylthiuram disulfide) is
added to terminate the polymerization reaction.

     After polymerization,  the crude Neoprene latex is sent from
the reactor through vacuum steam distillation equipment to strip
residual chloroprene from the polymer before it is coagulated and
separated  from the emulsion.  Other comonomers are added in
relatively small quantities, and should be 100 percent consumed
during the reaction.  During stripping, the latex is held in  an
agitated tank under vacuum.  Steam is fed into the bottom of  the
tank and moves up through the latex, removing the unreacted
chloroprene.  The steam and chloroprene from the top of the tank
are condensed, and the chloroprene is separated from the water by
decanting.  The recovered chloroprene is then recycled back to
monomer refining operations.

     Following stripping operations,  the Neoprene latex is sent
to product finishing operations.   If  the final product is to  be  a
latex, finishing consists of blending the stripped latex and
adding any product-specific additives  (e.g.,  antioxidants).
However, if the final product desired is solid Neoprene rubber,
then the rubber must be isolated from the latex emulsion.  The
most prevalent polychloroprene isolation technique involves
freezing.

     In the freeze-roll isolation  technique,  the  latex is
combined with  an amount of  acetic  acid  that  is not quite enough
to begin coagulation.  This  "sensitizes" the latex, which  is
passed over a  cooled drum  where  the  latex  sheet is  frozen  and the
rubber is  coagulated.15  The  rubber sheet is  then  removed  from
the drum and washed  with warm water.  The washed  sheet is  then
sent through  squeeze rollers to  remove  the washwater  before  being

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                                33

dried with hot air.  Finally,  the dried rubber is formed into
ropes,  which are cut and bagged.

HAP and HAP Emission Points For Production of Neoprene Rubber and
Latex

     Table 8 shows the potential HAP emission sources for
Neoprene production.  Emissions of HAP (chloroprene) from storage
tanks may be vented directly to the atmosphere or to a control
device.  Chloroprene is also emitted from the stripping operation
vents.   Emissions of chloroprene from the coagulation and
separation areas are low primarily due to the low temperature of
the freeze roll process.  Emissions from dryer vents are made up
of residual chloroprene monomer.

     Sources of wastewater containing HAP include the monomer
refining, stripping, isolation, and polymer washing operations,
as well as rainwater runoff from Neoprene manufacturing areas.
Wastewater from the monomer refining process is expected to
contain mostly reaction inhibitors and impurities, although very
low concentrations of chloroprene may be present.  The comonomer
refining processes generate chlorine and hydrogen chloride
emissions and wastewater discharges that contain chlorine and
hydrogen chloride.  The wastewater stream with the greatest HAP
concentration is associated with the stripping process.
Wastewater from the decanters will have a high loading of
chloroprene.  Runoff from polymer production areas may have high
concentrations of chloroprene monomer as well, depending on the
facility's design and housekeeping practices.  The wastewater
streams from the isolation and washing areas, however, are
expected to have low concentrations of chloroprene.

Nitrile Butadiene Rubber and Latex Production

     The Nitrile Butadiene Rubber Production source category
includes any facility that manufactures copolymers of unsaturated
nitriles and dienes; the latter are usually acrylonitrile and
1,3-butadiene.  Nitrile rubber resists oils, solvents, water,
salts,  and soaps.  The rubber's resistance to gas and oil
permeation increases with increasing acrylonitrile content, while
its elastomeric properties increase with increasing butadiene
content.  Most grades of nitrile rubber available today have
between 20 and 50 percent acrylonitrile content.16  Table 1
summarizes major end uses of nitrile butadiene rubber and latex.

Process Description for Production of Nitrile Butadiene Rubber
and Latex

     A general process flow diagram for NBR and NBL is shown in
Figure 9.  Nitrile butadiene rubber  (NBR) and latex  (NBL) are
produced by emulsion polymerization of acrylonitrile and
butadiene.  Solvent, bulk, or  other methods can also be used to

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                                     34
               Table 8.  Sources of HAP Emissions From Neoprene
                         (Polychloroprene) Production
                                C12      HC1       Chloroprene      Toluene
Storage and Handling              X                      X
Equipment Leaks                  X                      X
Process Vents
   Monomer Refining             XX            X
   Polymerization                                        X
   Stripping                                             X
   Material Recovery                                     X
   Finishing                                             X
   Drying                                               X
Wastewater
   Monomer Refining                                    X
   Polymerization
   Stripping                                             X
   Material Recovery                                    X
   Finishing                                             X
   Drying

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                                36

produce NBR and NBL.  In the U.S.,  four facilities have been
identified that currently produce NBR,  and three facilities have
been identified that currently produce NBL.

     Acrylonitrile is generally stored in fixed roof atmospheric
tanks.  Butadiene is stored under pressure.  To produce NBR and
NBL, butadiene and acrylonitrile monomers are combined in a
reactor with a soap solution and additives.

     Once polymerization is completed,  the reactor contents are
expelled into a blow-down tank.  This causes the residual
butadiene to flash from the mixture.  This vent stream is cooled
to condense water and acrylonitrile.  The uncondensed butadiene
is compressed and sent back to monomer storage.

     Following blow-down, the emulsion is sent to a steam
stripper to remove the majority of unreacted acrylonitrile.  The
acrylonitrile is separated from the condensed steam by a
decanter, purified, recovered by distillation, and sent back to
monomer storage.

     After steam stripping, the emulsion is coagulated by adding
an acid-brine solution.  The resulting crumb rubber is removed
from the liquid by mechanical filtration, washed to remove
residual acid-brine solution, filtered again, and mechanically
dewatered.  Finally, the product goes to a hot air dryer to
remove the remaining water before packaging.

     To produce NBL, the coagulation and drying steps described
above are omitted,  and the latex product is finished by blending
small amounts of antioxidants and other specialty ingredients.

HAP and HAP Emission Points For Production of Nitrile Butadiene
Rubber and Latex

     Potential HAP  emission sources from NBR and NBL production
are shown in Table  9.  Emissions of HAP from atmospheric storage
tanks  (acrylonitrile) may be vented directly to the atmosphere or
to  a  control device.  Butadiene emissions  from pressure vessels
are negligible.   Butadiene is  the dominant HAP emitted from  the
initial monomer recovery process  (blow-down tank).  Acrylonitrile
and small amounts  of butadiene  are emitted from the stripping
operations.  The emissions  from coagulation,  filter, and washing
vents  contain mostly acrylonitrile, because the majority of
butadiene has been removed  from the latex  in  previous  steps.
Acrylonitrile is also emitted  from  the hot air dryer vents.

      Sources of wastewater  containing HAP  include the  stripping,
 coagulation, monomer recovery  (including distillation  columns),
 and polymer  washing operations, as  well  as rainwater runoff.
 Since butadiene has a high  vapor pressure, it  is  rapidly
 volatilized  from wastewater and therefore  present in very  small

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Table 9. Sources



Storage and Handling
Equipment Leaks
Process Vents
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying
Wastewater
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying




37

of HAP Emissions From Nitrile Butadiene Rubber
and Latex Production

Acrylonitrile Butadiene
X
X X
X X
X X
X
X
X



X
X
X






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                               38

concentrations.  Wastewater from the stripping process will
contain acrylonitrile and small amounts of butadiene.  The
wastewater stream from the coagulation process will also contain
acrylonitrile.  Wastewater from the dewatering will have less
acrylonitrile than sources upstream of this operation.  Runoff
from the polymer production areas may have high concentrations of
acrylonitrile as well, depending on the facility's design and
housekeeping practices.

Polybutadiene Rubber Production

     The Polybutadiene Rubber Production source category includes
any facility that polymerizes 1,3-butadiene to produce
polybutadiene.  Table 1 summarizes major end uses of
polybutadiene rubber.

Process Description for Polybutadiene Rubber Production by
Solution

     A general process flow diagram for production of
polybutadiene rubber  (PER) by solution polymerization is shown in
Figure 10.   Although PER can be made through solution or
emulsion polymerization, all five facilities identified as
currently active in the U.S. use solution polymerization.  Pour
of these facilities also manufacture styrene-butadiene rubber by
solution.  The production process is similar to that of NBR,
except that the only monomer involved is 1,3-butadiene.

     Because  of its high volatility, butadiene must be stored
under pressure.  The typical solvents used in PER production via
the solution process are generally stored in fixed roof
atmospheric tanks.  Prior to being charged to the reactor,
inhibitors are removed from the butadiene using a caustic
contactor, and the monomer and solvent are thoroughly dried.  The
solvent most  commonly used is hexane, although benzene, toluene,
and cyclohexane can also be used.  All of these solvents are HAP
except cyclohexane.  The solvent used in the polymerization
process impacts the characteristics of the final polymer product.

     Following the, raw material drying process, butadiene,
solvent,  and  catalyst are combined in the reactor.   The catalysts
used are  organic lithium compounds or coordinating catalysts
containing metals in reduced valence states.17  The
polymerization reaction proceeds to a percent conversion greater
than 98 percent.  Following polymerization, the reactor contents,
called "cement" are transferred to a blow-down tank  to remove
unreacted butadiene monomer.  The blow-down vapor  stream is
cooled to condense butadiene, and the butadiene is compressed  and
sent to monomer storage.

     Following blow-down, the  cement is transferred  to a steam
stripping operation, which  causes the polymer to  coagulate into

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                               40

crumb rubber.  Solvent volatilized by the steam is recovered by
condensing the overhead vapor and decanting the organic solvent.
The solvent is recycled back to raw material drying operations
before going to solvent storage.

       The crumb rubber leaves the stripping operation in a water
slurry, and is separated from the water by mechanical filters
(screens or skimmers), extruded,  and dried with hot air before
being baled.

Polybutadiene Rubber and Latex Production by Emulsion

     A general process flow diagram for PER and PEL by emulsion
polymerization is shown in Figure 11.  No facilities were
identified that currently produce polybutadiene rubber or latex
by emulsion.  In emulsion polymerization, butadiene monomer is
combined in a reactor with emulsifiers and catalysts.  Once
polymerization is complete, the reactor contents are expelled
into a blow-down tank, which flashes off butadiene.  This vapor
stream is condensed, compressed,  and sent back to monomer
storage.

     To produce PER, the emulsion is coagulated by adding an
acid-brine solution.  The resulting crumb rubber is removed from
the water by mechanical filtration, washed to remove residual
acid-brine solution, filtered to separate it from the wash water,
and mechanically dewatered.  Finally, the rubber product goes to
a hot  air dryer to  remove the remaining water before packaging.

     To produce PEL, the coagulation and drying steps described
above  are omitted,  and specialty ingredients are blended into the
emulsion from the blow-down tank.  The finished latex is shipped
out in 55-gallon drums or as bulk product in rail cars.

HAP and HAP  Emission Points For Production of Polybutadiene
Rubber

     The potential  HAP emission sources  from PER production by
the solution process are shown in Table  10.  Table 11 shows the
potential HAP emission sources from  PER  and PEL production by the
emulsion process. '  In either  case, emissions of HAP  from pressure
vessels are  negligible.  Fixed roof  tank emissions may vent
directly to  the atmosphere  or to a control  device.

      In the  solution process, the  emissions from  the reactor
vents  contain butadiene and solvent.  The vents from the blow-
down  tank  system  contain mostly butadiene.  Solvent  and small
amounts of  butadiene are emitted from stripping operation vents.
Residual  solvent  is also emitted from the  filtering,  extruding,
and drying  operations.

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                                       42
           Table 10.  Potential Sources of HAP Emissions of HAP Emissions
           From Polybutadiene Rubber Production by Solution Polymerization

Storage and Handling
Equipment Leaks
Process Vents
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying
Wastewater
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying
Hexanea Butadiene
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X X
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X X

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Toluene*
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'  Other non-HAP solvents are sometimes used. Toluene and hexane are unlikely to be used
together.

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                             43
Table 11.  Potential Sources of HAP Emissions From Polybutadiene
     Rubber and Latex Production By Emulsion Polymerization

                                             Butadiene
•                     Storage and Handling
                       Equipment Leaks                              X
I                     Process Vents
                          Monomer Refining                          X
•                        Polymerization                             X
                          Stripping
•                        Material Recovery                           X
                          Finishing                                  X
I                        Drying                                    X
                       Wastewater
|                        Monomer Refining
                          Polymerization
|                        Stripping
_                        Material Recovery
•                        Finishing
.                        Drying	


I

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                               44

     Sources of wastewater containing HAP from the solution
process include the monomer refining, stripping, material
recovery,  and polymer washing operations, as well as rainwater
runoff.  Because butadiene has a high vapor pressure, it
volatilizes rapidly from wastewater and therefore, is present in
very small concentrations.   Wastewater from the monomer refining
process will contain solvent and very small concentrations of
butadiene.  Wastewater from the stripping/coagulation and the
solvent/monomer recovery processes will contain solvent and very
small amounts of butadiene.  Wastewater from the dewatering
process will have less solvent than sources upstream of this
operation.  Runoff from the polymer production areas may have
high concentrations of solvent, depending on the facility's
design and housekeeping practices.

     Because no organic solvent is used in the emulsion process,
the only HAP emitted from process vents is butadiene.  The
majority of butadiene emissions come from the blow-down tank.
Coagulation emissions contain some butadiene, and residual
butadiene is emitted from the dryer vents due to the elevated
temperature of the dryers.

     Sources of wastewater containing HAP from the emulsion
production process include the coagulation, monomer  recovery, and
polymer washing operations, and rainwater runoff.  The wastewater
stream from the coagulation process will also contain very small
amounts of butadiene.  Wastewater from the dewatering process
will have even less butadiene than sources upstream  of this
operation.  Runoff from the polymer production areas may have
very low  concentrations of butadiene as well, depending on the
facility's design and housekeeping practices.

Polysulfide Rubber Production

     The  Polysulfide Rubber Production source category includes
any facility engaged in polysulfide polymerization to produce a
synthetic rubber that is  resilient and has low  temperature
flexibility.   Polysulfide  rubber is  used in  the  insulating glass
industry; in construction  (e.g., to  fill irregular joints);  in
aircraft  (as a sealant in  integral fuel  tanks);  and  as
"flexibilizers" for epoxy resins, dental molding compounds,
concrete  coatings, and such.18  Table I summarizes major end  uses
of polysulfide rubber.

Process Description For Production of  Polysulfide Rubber

       Figure 12 contains  a general process  flow diagram  for  the
production  of  polysulfide rubber.  One facility was  identified  in
the U.S.  that  currently manufactures polysulfide rubber.

      In the production process,  ethylene oxide  and  hydrochloric
acid  are  continuously reacted to form  ethylene  chlorohydrin.19

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                               46

Formaldehyde is added to the ethylene chlorohydrin to produce
bis-chloroethyl formal,  which is sometimes simply termed formal.
In a separate continuous process,  elemental sulfur and sodium
hydroxide are reacted to form sodium polysulfide, which is called
NaSH.  The NaSH is -reacted with the formal to form a latex
product.  To make a solid polysulfide product,  the latex is
washed and settled out,  which removes the sodium vinyl chloride
and NaSH, forming a solid product.  Other polysulfide products
can be made through process variations, such as chemically
splitting the solid product, or substituting other HAP, such as
ethylene dichloride, for formal in the NaSH reaction.

HAP and HAP Emission Points For Production of Polysulfide Rubber

     The only potential sources of HAP emissions from production
of polysulfide rubber are the pumps and valves that are in HAP
service in the front end of the production process.19  These HAP
include formaldehyde, ethylene dichloride, and ethylene oxide.
Industry representatives state that these HAP are totally
consumed in the production process, so that no other potential
emission sources exist.19

Styrene-Butadiene Rubber and Latex Production

     The Styrene-Butadiene Rubber and Latex Production source
category includes any facility that manufactures copolymers
consisting of styrene and butadiene monomer units to produce
styrene butadiene rubber or latex.  Styrene-butadiene rubber
 (SBR) can be produced by either emulsion  or solution
polymerization.  Styrene-butadiene latex  (SBL) is produced by
emulsion polymerization.  Table 1 summarizes major end uses of
styrene-butadiene rubber and latex.

Process Description for Styrene-Butadiene Rubber Production by
Solution

     A  general process flow diagram for SBR by solution
polymerization is  shown in  Figure 13.  Four facilities have been
identified in the U.S. that currently manufacture styrene-
butadiene rubber by the solution process,- all these  facilities
also produce polybutadiene  rubber by solution.   Styrene monomer
has  low volatility and may  be  stored in fixed roof tanks  at
atmospheric pressure.  Butadiene must  be  stored  under  pressure
because of its high vapor pressure.  The  solvents commonly used
in the  SBR solution process are typically stored in  fixed roof
atmospheric tanks.   Prior to being  charged  to the reactor, a
 caustic contactor  is used to remove  inhibitors  from  butadiene,
and steam is used  to remove the inhibitors  from styrene.  Next,
the monomers and  solvent are thoroughly dried.   Solvents  used in
 solution polymerization are hexane  and toluene,  although  hexane
 is the  most common. Both of these  solvents are HAP.   The solvent

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                               48

used in the polymerization process impacts the characteristics of
the final polymer product.

     Following the drying process,  butadiene,  styrene,  solvent,
and catalyst are combined in the reactor.   Once polymerization is
completed, the cement is expelled to a blow-down tank to flash
off most of the unreacted butadiene.  This vent stream is cooled
to condense any water and styrene.   The butadiene is compressed
and sent back to monomer storage.

     Following blow-down, the rubber cement is sent to a steam
stripper to remove any unreacted styrene and solvent, which are
decanted from the condensed steam overheads.   The solvent and
styrene are separated by distillation and sent back to raw
material storage.  The steam added during stripping also serves
to coagulate the polymer.  The crumb rubber is removed from the
water by mechanical filtration, extruded,  and dried with hot air
before being sent to packaging.

Styrene-Butadiene Rubber and Latex Production by Emulsion

     A general process flow diagram for SBR and SBL by emulsion
polymerization is shown in Figure 14.  In the U.S., four
facilities have been identified that produce SBR by the emulsion
process, and 15 facilities have been identified that produce SBL
by the emulsion process.  The polymerization process for SBR and
SBL is similar to emulsion NBR and NBL production, with styrene
replacing the acrylonitrile monomer.

     In emulsion polymerization, butadiene and styrene monomers
are combined in a reactor with emulsifiers, soaps, and catalysts.
Inhibitors are removed from the butadiene and styrene monomers
using the same techniques described in solution polymerization.

     Once polymerization is completed, the reactor contents are
expelled from the reactor to a blow-down tank, which flashes off
unreacted butadiene.  The vapor stream from the blow-down tank is
condensed and compressed to separate the butadiene from styrene
and water.  The butadiene and  styrene are recycled.
                  \
     Following blow-down, the  emulsion is sent to a  steam
stripper to remove any unreacted styrene.  The overhead stream
from the  steam stripper  is condensed and decanted to separate  the
styrene  from the water.  The styrene is recycled.

     If  SBL is the final product, the latex is finished by
blending with specialty  ingredients.  To produce  SBR, the
emulsion  is coagulated by adding an acid-brine solution.  After
coagulation, the crumb rubber  is separated from water by
filtration, is washed to remove  the remaining acid-brine
solution,  is filtered again to separate it from the  wash water,
and is mechanically  dewatered.   Finally, the  rubber  product goes

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                               50

to a hot air dryer to remove the remaining moisture before
packaging.

HAP and HAP Emission Points For Styrene-Butadiene Production

     Table 12 shows potential HAP emission sources from process
vents associated with production of SBR by the solution process.
Table 13 shows the potential HAP emission sources from SBR and
SBL production by the emulsion process.  In either case,
emissions of HAP from fixed roof atmospheric tanks may be vented
directly to the atmosphere or to a control device.  Pressurized
storage vessels are assumed to have negligible emissions.

     In the solution process, the emissions from the reactor
vents contain butadiene monomers, styrene monomers, and solvent,
which is usually hexane.  The vents from the blow-down tank
system contain mostly butadiene with a small amount of styrene.
Styrene monomer and hexane, along with small amounts of
butadiene, are emitted from stripping operation vents and
material recovery operations.  Styrene and solvent are also
emitted from the finishing and drying process.

     In the emulsion process, the only HAP emitted from process
vents are styrene and butadiene.  The majority of butadiene
emissions come from the blow-down tank.  Emissions from the
stripping operation vents contain styrene, hexane, and small
amounts of butadiene.  Coagulation vent emissions contain styrene
and hexane.  The dryer vent HAP emissions are also comprised of
styrene and hexane.

     Sources of wastewater containing HAP from the solution
process include the monomer refining, stripping, material
recovery, and finishing operations, as well as stormwater outdoor
runoff from the process areas. Because butadiene has a high vapor
pressure, it is rapidly volatilized from wastewater and
therefore, is present in very small concentrations.  Wastewater
from the monomer refining process, the stripping process, and  the
material recovery processes will contain solvent,  styrene, and
very small amounts of butadiene.  Wastewater  from  the finishing
operations will have less solvent and styrene than sources
upstream of this operation.  Runoff from the polymer production
areas may have high concentrations of solvent and  styrene as
well, depending on the  facility's design and  housekeeping
practices.

     Sources of wastewater containing HAP from the emulsion
process include the coagulation, monomer recovery, and  polymer
washing operations, as  well  as runoff  from  styrene-butadiene
rubber manufacturing via the emulsion process.   The wastewater
stream  from the coagulation  process will  contain styrene and very
small amounts of butadiene.  Wastewater from  the monomer recovery
processes will contain  styrene and low concentrations of

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1
1
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1

i

1

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1

1







1
1
1
1


Table 12. Potential
Butadiene Rubber and



Storage and Handling
Equipment Leaks
Process Vents
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying
Wastewater
Monomer Refining
Polymerization
Stripping
Material Recovery
Finishing
Drying

a Hexane and toluene are unlikely




51

Sources of HAP Emissions


From Styrene-



Latex Production by Solution Polymerization


Styrene Butadiene
X
X X

X X
X X
X X
X X
X
X

X

X
X
X


to be used concurrently.






Hexane"
X
X

X
X
X
X
X
X

X

X
X
X









Toluene"
X
X

X
X
X
X
X
X

X

X
X
X








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                                         52
              Table 13.  Potential Sources of HAP Emissions from Styrene-
           Butadiene Rubber and Latex Production by Emulsion Polymerization

                                                Styrene           Butadiene
     Storage and Handling                          X
     Equipment Leaks                              X                X
     Process Vents
         Monomer Refining                                            X
         Polymerization                             X                X
         Stripping                                  X                X
         Material Recovery                          X                X
         Finishing                                  X
         Drying*                                   X
     Wastewater
         Monomer Refining
         Polymerization
         Stripping                                  X
         Material Recovery                          X
         Finishing                                  X
         Dryinga
• These emissions are for rubber production only (i.e., no dryer vent emissions for latex
production).

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                               53

butadiene.  Wastewater from the dewatering process will have
styrene and even less butadiene than sources upstream of this
operation.  Stormwater runoff from the polymer production areas
may contain styrene and very low concentrations of butadiene as
well,  depending on the facilities design and housekeeping
practices.

REFERENCES
1.   Sax, N.I. and R.J. Lewis, Sr., eds.   Hawley's Condensed
     Chemical Dictionary.  Eleventh Edition.  New York, Van
     Nostrand Reinhold Company.  1987.

2.   Kirk-Othmer Concise Encyclopedia of Chemical Technology.
     New York, John Wiley & Sons.  1985.   p. 391.

3.   Reference 1, p. 31592.

4.   National Emission Standards for Hazardous Air Pollutants for
     Source Categories: Organic Hazardous Air Pollutants from the
     Synthetic Organic Chemical Manufacturing Industry and Other
     Processes Subject to the Negotiated Regulation for Equipment
     Leaks. Final Rule 59 Federal Register  19402-19625.  April
     22,  1994.

5.   Butyl Elastomers.  In:  Chemical Economics Handbook.  SRI,
     International.  February 1989.

6.   Documentation for Developing the Initial Source Category
     List.  Final Report.  Office of Air Quality planning and
     Standards, U.S. Environmental Protection Agency.  EPA-450/3-
     91-030.  July 1992.

7.   Austin, G.T. Shreve's Chemical Process Industries.  Fifth
     Edition.  New York, McGraw-Hill Book Company.  1984.
     p.  704.

8.   Kent, J.A., ed.  Riegel's Handbook of Industrial Chemistry.
     Eighth Edition.  New York, Van Nostrand Reinhold Company.
     1983.

9.   Epichlorohydrin. In:  Encyclopedia of Polymer Science and
     Engineering.  Second Edition.  1985.

10.  Ref  3, p. 706.

11.  Ref  3, p. 705.

12.  Telecon.  Butts, T. and S. Eiselstein, Miles, Incorporated,
     with Norwood, P., EC/R Inc.  June 28, 1994.  Discussion of
     suspension process and HAP usage.

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                               54

13.   Letter from Herabree,  R.D.,  Exxon Chemical Company to Evans,
     L.B.,  EPA:ESD.  June 7,  1994.   Ethylene propylene rubber
     subcategorization and the potential for switching to non-HAP
     solvents.

14.   Ref.  2,  p. 392.

15.   Ref.  14, p. 288.

16.   Ref 2, p.  395.

17.   Ref 2, p.  396.

18.   Polysulfides.   In:  Encyclopedia of Polymer Science and
     Engineering.  Second Edition.   Vol. 13.  1985.

19.   Memorandum, from Clark,  C.,  EC/R Inc., to Evans, L.,
     EPA/ESD/OCG.  March 21,  1995.   Summary of Meeting with
     Manufacturers of Polysulfide Rubber.

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     E /R Incorporated


















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                                  Environmental Consulting and Research
MEMORANDUM

Date:     May 10,  1995

Subject:  Baseline Emissions  for  Elastomer Production Facilities
          (Polymers and  Resinsyl)

From:     Phil Norwood,  EC/1

To:       Leslie Evans,  EPA/OAQPS/ESD/OCG


   '. The purpose of this memorandum is to present the baseline
hazardous air pollutant  (HAP)  emissions for the source categories
that are included  in the Polymers and Resins I project.  The
memorandum is organized  by the four major emission source types
identified at these "elastomer" production facilities:  storage,.
process vents, wastewater,  and equipment leaks.  For each
emission source type, the methodology used to estimate the
baseline HAP emissions is presented,  along with plant-specific
.estimates for each of the 12  elastomer subcategories.

     The primary basis for the emission estimates was information
submitted to the Environmental Protection Agency (EPA) by the
elastomer.producers in response to information collection
activities conducted under the EPA's Section 114 authority.1
The EPA sent a questionnaire  to selected companies that produced
elastomers in December 1991.   The December -1991 questionnaire was
specifically.designed to obtain production, emissions, and
emissions control  information from the manufacture of polymers.
Therefore, responses to  this  questionnaire contained not only HAP
emissions estimates,  but the  parameters and background data used
to calculate the emissions.

     However, due  to requirements limiting the burden of
information collection request activities on industry, this
questionnaire was  only sent to nine companies.  Therefore, a
separate Section 114 questionnaire was sent to the remainder of
the identified elastomer producers in May 1992.  The May 1992
questionnaire w^s  a "generic" Section 114 questionnaire that
could be sent to all elastomer producers.  However, due.to the
generic nature.of  this questionnaire, it was not as well suited
to obtain the background data to  support the HAP emission
estimates.  This was particularly true for emissions from
storage, wastewater,  and equipment leaks..

     In late 1993, the EPA sent a series of "clarification"
letters to address unclear areas  in the original responses.  The
responses from the two questionnaires and the clarification
letters are included in  section II-D of Air Docket A-92-44.
               3721-D University Drive • Durham, North Carolina 27707
                 Telephone: (919) 493-6099 . Fax: (919) 493-6393

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STORAGE VESSEL EMISSIONS

     The December 1991 Section 114 questionnaire requested
information on storage vessel capacity,  the material stored
(including HAP weight percent),  the number of annual turnovers,
control technology,  and estimated HAP emissions.  However, as
noted above, the May 1992 questionnaire was not well suited to
obtain storage vessel information, and in most cases only HAP
emissions were reported.  Therefore, the baseline emissions for
storage, which are shown in Table 1, are taken directly from the
Section 114 responses.

     It should be noted that these emission estimates include
only those vessels that store raw materials.  Vessels storing raw
products or intermediates were considered to be process
operations and not storage, and emissions from these vessels were
included in the process vent baseline emissions.  Further, many
of the final products of this industry are "bales" of solid crumb
rubber, and not liquids.  Any emissions reported from these
solids were considered to be "back-end" process emissions due to
the residual HAP remaining in the solid, and not storage
emissions.  While some facilities did produce latex, the HAP
concentrations (and resulting HAP emissions) in this product were
negligible.


PROCESS VENT EMISSIONS

     As with storage vessels, the baseline process vent emission
estimates were primarily taken from the Section 114 responses.
Process emissions were separated into "front-end" and "back-end"
emissions.  The front-end includes prepolymerization operations,
reaction, stripping, and material recovery.  The back-end
includes post-stripping operations, such as drying and finishing.

     The combustion of process vent emissions, particularly
front-end emissions, was common in most subcategories.  However,
significant differences existed in the reported destruction
efficiencies.  The destruction efficiencies ranged from 95
percent to 99.999 percent.  Flares cannot be tested, but the EPA
has determined that flares operated properly can achieve
efficiencies of 98 percent and greater.  Therefore, the flare
efficiency reported most often was 98 percent.  While thermal
oxidizers/incinerators can be tested to show efficiencies greater
than 98 percent, the EPA historically has not required
replacement of flares with incinerators, and considers flares to
be equally effective.  In order to eliminate this potential bias
against flares, process vent emissions controlled by a flare,
thermal oxidizer, or incinerator were "adjusted" to assume 98
percent control.

     The baseline process vent HAP emissions are provided in
Table  2.  Attachment 1 provides a vent-by-vent breakdown of the
emission estimates.

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TABLE 1.  BASELINE HAP EMISSIONS FROM STORAGE VESSELS
Facility
Reported
Storage HAP
Emissions
(Mg/yr)
Butyl Rubber
BR-1
0
Epichlorohydrin
EPI-1
10.1
Facility
Reported
Storage HAP
Emissions
(Mg/yr)

Ethylene Propylene Rubber - 18.5 Mg/yr
EPR-1
EPR-2
EPR-3
3.4
2.5
0
Halobutyl Rubber
HBR-l
64.8
Hypalon™
HYP-1
6.9
Neoprene - 43.5 Mg/yr
NEO-l
NEO-2
21.7
20.9
EPR-4
EPR-5
4.7
7.9

NEO-3
0.9

Nitrile Butadiene Latex - 1.7 Mg/yr
NBL-1
NBL-2
1.5
0
NBL-3
0.2

Nitrile Butadiene Rubber - 1.4 Mg/yr
NBR-1
NBR-2
31.5
0
NBR-3
NBR-4
0.2
0
Polybutadiene/Styrene Butadiene Rubber by Solution - 4.3 Mg/yr
PBR/SBRS-1
PBR/SBRS-2
PBR/SBRS-3
0.8
0.1
0
Polysulfide Rubber
PSR-1
0.7
PBR/SBRS-4
PBR/SBRS-5
1.5
1.8


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TABLE 1.   BASELINE HAP EMISSIONS FROM STORAGE VESSELS  (continued)
Facility
Reported
Storage HAP
Emissions
(Mg/yr)
Facility
Reported
Storage HAP
Emissions
(Mg/yr)
Styrene Butadiene Latex - 8.6 Mg/yr
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-8
1.2
0.6
0.5
0.2
0.9
0.3
0.5
0.3
SBL-9
SBL-10
SBL-11
SBL-12
SBL-13
SBL-14
SBL-15
0.6
1.0
0.5
0.4
0.8
0.9
0

Styrene Butadiene Rubber by Emulsion - 7.6 Mg/yr
SBRE-l
SBRE-2
2.2
0
SBRE-3
SBRE-4
0.2
5.2

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TABLE 2.  BASELINE HAP EMISSIONS FROM PROCESS VENTS*
Facility
Baseline Process Vent HAP Emissions (Mg/yr)
Front-End
Back-End
Total
Butyl Rubber
BR-1
367.4
109.5
476.9
Epichlorohydrin
EPI-1
0.7
16.5
17.2
Ethylene Propylene Rubber
EPR-1
EPR-2
EPR-3
EPR-4
EPR-5
Subcategory
Totals
18.3
90.2
5.1
80.6
25.7
219.9
1,127.7
348.6
36.8
413.6
68.4
1,995.1
1,146.0
438.8
41.9
494.2
94.1
2,215.0
Halobutyl Rubber
HBR-1
683.5
280.5
964.0
Hypalon™
HYP-l
49.8
28.6
78.4
Neoprene
NEO-l
NEO-2
NEO-3
Subcategory
Totals
222.0
108.3
21.3
351.6
34.5
150.0
18.9
203.5
256.5
258.3
40.2
555.1
Nitrile Butadiene Latex
NBL-1
NBL-2
NBL-3
Subcategory
Totals
2.6
0.001
0.9
3.5

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TABLE 2.  BASELINE HAP EMISSIONS FROM PROCESS VENTS  (continued)
Facility
Baseline Process Vent HAP Emissions (Mg/yr)
Front-End
Back-End
Total
Nitrile Butadiene Rubber
NBR-1
NBR-2
NBR-3
NBR-4
Subcategory
Totals
0.7
28.8
2.8
5.5
37.8
9.1
94.7
10.5
0.4
114.7
9.8
123.5
13.3
5.9
152.5
Polybutadiene/Styrene Butadiene Rubber by Solution
PBR/SBRS-1
PBR/SBRS-2
PBR/SBRS-3
PBR/SBRS-4
PBR/SBRS-5
Subcategory
Totals
3.2
0
0
159.6
6.0
168.8
390.4
0
205.5
771.6
1,035.7
2,403.2
393.6
0
205.5
931.2
1,041.7
2,572.0
Polysulfide Rubber
PSR-1
0
0
0
Styrene Butadiene Latex
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-8
SBL-9
SBL-10
SBL-11
2.5
22.9
8.4
0.8
1.8
5.1
3.6
6.1
2.2
0.8
0.8

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 TABLE 2.   BASELINE HAP EMISSIONS FROM PROCESS VENTS (continued)
Facility
SBL-12
SBL-13
SBL-14
SBL-15
Subcategory
Totals
Baseline Process Vent HAP Emissions (Mg/yr)
Front-End
Back-End
Total
1.1
0.6
20.0
212.0
288.7
Styrene Butadiene Rubber by Emulsion
SBRE-1
SBRE-2
SBRE-3
SBRE-4
Subcategory
Totals
6.3
7.3
3.5
2.5
19.6
251.5
72.7
148.1
379.3
851.6
257.8
80.0
151.6
381.8
871.2
a Discrepancies between the  totals in Table 2  and the attachment
are attributed to differences in rounding.

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WASTEWATER OPERATION EMISSIONS

     The December 1991 Section 114 questionnaire requested
detailed information on HAP-containing wastewater streams.  The
responses to this questionnaire ranged from no information to
emission estimates with detailed wastewater stream
characteristics.  Several facilities submitted wastewater
emission estimates that were generated using computer models.
Since the emission estimates provided were calculated using so
many different techniques (and in many cases not provided at
all), comparison of emissions between facilities was not
possible.  Therefore, it was necessary to develop a methodology
to estimate wastewater emissions on a consistent basis.  The
following section discusses this methodology.

Wastewater Emission Estimation Methodology

     The methodology used to estimate HAP emissions from
wastewater operations consisted of four basic steps:
(I)  identify wastewater streams,
(2)  obtain/estimate stream characteristics,
(3)  calculate uncontrolled HAP emissions, and
.(4)  identify controls and calculate HAP emissions after control.
The following sections describe each of these steps in more
detail.  In Attachment 2, an example is provided to demonstrate
the application of this methodology.

Identify wastewater streams

     At elastomer production facilities, wastewater streams that
contain HAP were reported from a variety of locations in the
process.  For the wastewater analyses, the basic elastomer
production process was separated into five different areas:
(1) storage and material handling,  (2) prepolymerization,
(3) reaction, (4) stripping and material recovery, and
(5) finishing.  The origination  (i.e., process area) of each
reported wastewater stream was identified.

     For each subcategory, a comparison was made between the
number and locations of wastewater streams.  For facilities that
did not report any wastewater information, the assumption was
made that wastewater streams were generated from the same process
areas as other facilities in the subcategory.  When facilities
reported wastewatler information, the number of streams identified
was the number assigned to that  facility.  In other words, if a
facility reported a wastewater stream from stripping/material
recovery and one from finishing, an additional stream from
prepolymerization would not have been assigned just because
another facility in the subcategory reported a stream from that
process area.

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Obtain/estimate stream characteristics

     For each wastewater stream, two main characteristics  are
needed to calculate uncontrolled emissions using the method
described below: flow rate and speciated HAP concentration.
These parameters must be determined/estimated at the wastewater
stream's point of generation.  If a facility provided this
information, it was used.  For those streams where flow  and
concentration were not provided, these characteristics were
extrapolated from other facilities.  The average  (mean)
concentration of all streams  (for which "real" data were
provided) originating from the same process area in the  same
subcategory was used.  The average flow rate was also determined,
and was weighted by production.

Calculate uncontrolled HAP emissions

     From the point of generation, wastewater usually passes
through a series of collection and treatment systems before being
discharged from a facility.  Many of these units are open  to the
atmosphere and allow organic-containing wastewaters to come in
contact with ambient air, thus creating an opportunity for
organic HAP emissions.  The magnitude of the emissions depends on
factors such as the physical properties of the pollutants, the
temperature of the wastewater, and the design of the individual
collection and treatment units.  Since these properties  were
generally not available for wastewater generated at elastomer
facilities, the fraction emitted (Fe)  values from the Hazardous
Organic NESHAP (HON) were used to predict the amount of  HAP that
would be emitted, relative to the amount in the stream.

     Therefore, for each HAP in each wastewater stream,  the
uncontrolled emissions were calculated using the following
equation:

              ^control, = (5.26 X 1CT4) (HAPcme±) (£>) (F^)


where:
     Euncontrol-=   Uncontrolled emissions of HAP i, Mg/yr
     HAPconcj™   Concentration of HAP i at the point of generation,
               ppmw
     Q   =     Flow rate of wastewater stream at the point of
               generation, liters per minute
     Fe.   =    Fraction emitted value of HAP i, from Table 34 of
               Subpart G of 40 CFR 63.

     Some concern was raised by industry regarding the use of the
HON Fe  values  in  estimating emissions  from elastomer facilities.
In particular, it was indicated that the surfactants and
emulsifiers used in the emulsion processes could drastically
change the amount of HAP emitted.^  However,  in the absence of
any data specific to the elastomer industry, the HON values
provide a reasonable (although conservative) estimate.

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                                10

Identify controls and calculate HAP emissions after control

     After each stream had been identified/assigned, flow rate
and HAP concentration determined/extrapolated, and uncontrolled
emissions calculated, wastewater controls were evaluated.  The
only way that control was assigned to a stream was if it were
clearly identified in the Section 114 response (or other follow-
up correspondence).   In fact, while there was a general
indication by industry that wastewater control was common,
particularly among those producers using emulsion processes, the
stream-specific information seldom identified control.3*4

     Where control was identified for a particular stream, the
HON chemical-specific fraction removed, or Fr,  values were used
to estimate the amount of organic HAP that would be removed from
the stream.  The controlled emissions were then calculated using
the following equation:

                  =  (5.26 X 1CT4) (HAPconCi) (Q) (l - F^) (F.J
where:
     Econtroi-~    Emissions of HAP i after control, Mg/yr
     HAPcong.=   Concentration of HAP i at the point of generation,
               ppmw
     Q   =     Flow rate of wastewater stream at the point of
               generation, liters per minute
     Fr.   =    Fraction removed value, from Table 9 of Subpart  G
       1        Of 40 CFR 63.
     Fe.   =    Fraction emitted value, from Table 34 of Subpart G
       1        of 40 CFR 63.

Summary of Wastewater Emission Estimates

     The baseline wastewater emission estimates are provided  in
Table 3.  A stream by stream summary is included as Attachment  3.


EQUIPMENT LEAK EMISSIONS

     The circumstances surrounding the emission estimates for
equipment leaks were very similar to the situation described
above for wastewater emissions.  The December 1991 Section 114
questionnaire requested detailed information on components in HAP
service, and the responses ranged from no information to detailed
data on emissions and control techniques.  The emission estimates
provided in response to the December 1991 Section 114
questionnaire were made using a variety of approaches.  A
comparison of emissions not only reflected the variation in the
levels of control, but also differences in the approaches used  to
estimate the emissions.  The May 1992 Section 114 questionnaire
did not address emissions from equipment leaks.  Therefore, it

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                             11



TABLE 3.  BASELINE HAP EMISSIONS FROM WASTEWATER OPERATIONS
Facility
Baseline
Wastewater HAP
Emissions
(Mg/yr)
Butyl Rubber
BR-1
148.5
Epichlorohydrin
EPI-1
6.7
Facility
Baseline
Wastewater HAP
Emissions
(Mg/yr)

Ethylene Propylene Rubber - 19.6 Mg/yr
EPR-1
EPR-2
EPR-3
0.1
0
3.6
Halobutyl Rubber
HBR-1
0
Hypalon™
HYP-1
0
Neoprene - 21.1 Mg/yr
NEO-1
NEO-2
5.5
11.6
Nitrile Butadiene Latex - 103.9
NBL-1
NBL-2
98.0
0
EPR-4
EPR-5
15.8
0.1

NEO-3
4.0
Mg/yr
NBL-3
5.9

Nitrile Butadiene Rubber - 7.5 Mg/yr
NBR-1
NBR-2
2.2
2.1
NBR-3
NBR-4
2.1
1.1
Polybutadiene/Styrene Butadiene Rubber by Solution- 25.6 Mg/yr
PBR/SBRS-1
PBR/SBRS-2
PBR/SBRS-3
3.8
0.1
16.9
PBR/SBRS-4
PBR/SBRS-5
2.0
2.8


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                             12

TABLE 3.  BASELINE HAP EMISSIONS FROM WASTEWATER  OPERATIONS
                         (continued)
Facility
Baseline
Wastewater HAP
Emissions
(Mg/yr)
Polysulfide Rubber
PSR-1
0
Facility
Baseline
Wastewater HAP
Emissions
(Mg/yr)

Styrene Butadiene Latex - 690.8 Mg/yr
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-8
0.8
0.1
0
0
2.1
62.9
0.03
243.0
SBL-9
SBL-10
SBL-11
SBL-12
SBL-13
SBL-14
SBL-15
12.5
6.3
250.2
4.5
23.7
71.1
13.6

Styrene Butadiene Rubber by Emulsion - 84.5 Mg/yr
SBRE-1
SBRE-2
49.5
10.0
SBRE-3
SBRE-4
21.2
3.8

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was necessary to develop a methodology to estimate equipment leak
emissions on a consistent basis.  The following section discusses
this methodology.

Equipment Leak Emission Estimation Methodology

     The EPA's Equipment Leak Emission Estimate Protocol
Document5 lists four approaches for estimating equipment leak
emissions: (1) average emission factor, (2) screening ranges,
(3) EPA correlation, and (4) unit-specific correlation.  All of
these approaches require equipment counts by type of equipment
(i.e., valves, pumps, connectors, etc.) and possibly by type of
service  (i.e., heavy liquid, light liquid, and gas).  Except for
the Average Emission Factor Approach, all of the approaches
require screening data.  Due to the number of facilities for
which screening data were not available, the average emission
factor approach, modified to consider existing control programs,
was selected to estimate the baseline emissions from equipment
leaks.

     The average emission factor approach uses emission factors
developed by the EPA in combination with unit-specific
information to estimate the uncontrolled emissions.  This unit-
specific information includes:  (1) the number of each type of
component, (2) the service each component is in, (3) the HAP
concentration in each stream, and  (4) the time period each
component was in that service.  For this analysis, average
emission factors from the SOCMI industry were used.  It was
assumed that all components were in "pure" HAP service  (i.e., the
HAP concentration in each stream was 100 percent).  It was also
assumed that the components were in HAP service continuously
(8,760 hours per year).  Therefore, the items needed to complete
the uncontrolled equipment leak emission estimates were the
number of each type of component, and the type of service of each
component.

     Therefore, the methodology used to estimate HAP emissions
from equipment leaks consisted of three basic steps:
(1)  obtain/estimate component counts,
(2)  identify/estimate existing level of control,
(3)  calculate baseline HAP emissions.
The following sections describe each of these steps in more
detail.  In Attachment 4, an example is provided to demonstrate
the application of this methodology.

     As discussed in more detail below, the uncontrolled emission
factors were adjusted to incorporate controls.  The use of the
average emission factor approach, coupled with the assumptions
noted above, resulted in conservative HAP emission estimates.

Obtain/estimate component counts

     As noted above, the December 1991 Section 114 questionnaire
requested detailed information on components in HAP service.

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                               14

Component counts were acquired for facilities completing this
questionnaire.   However, for facilities receiving the May 1992
Section 114 questionnaire, and facilities not completing the
earlier questionnaire, it was necessary to estimate component
counts.  The components included in the analyses were:
compressor seals, pumps in light liquid service,
flanges/connectors, pressure relief valves, valves in gas
service, valves in liquid service, open-ended lines, and sample
lines.

     For each component type at each facility, the ratio of
number of components per unit of capacity was calculated (i.e.,
0.03 pump per Megagram of capacity).  Then, an average ratio was
calculated for each subcategory for each component type, based on
those facilities for which actual component counts were
available.  This average ratio was applied to the capacity of the
"other" facilities to obtain estimates of the number of
components.

Identify/estimate existing level of control

     Many elastomer production facilities reported a leak
detection and repair  (LDAR) program, and/or some equipment to
reduce emissions from leaking components in HAP service.  Based
on information submitted in response to the December 1991 Section
114 questionnaire, the control level was identified for each of
the eight component types listed above.  For LDAR programs, the
two critical factors were the interval between monitoring
inspections and the leak definition (i.e., HAP concentration that
constituted a leak).

     There were a number of facilities for which no information
was provided.  In these cases, baseline control levels were
estimated based either on applicable State regulations, or on the
equipment leak programs in place at similar facilities in the
same State  (this assumes that similar facilities in ozone
nonattainment areas in the same State would have comparable
permit conditions).   In some cases, there was no indication from
any facility that an  equipment leak control program was in
effect.  Attachment 5 shows the baseline control levels for each
component type at each facility, along with the bases for the
levels.

     Four of the subcategories (Hypalon™, Polybutadiene and
Styrene Butadiene Rubber by Solution, Styrene Butadiene Latex,
and Styrene Butadiene Rubber by Emulsion) are subject to the HON
equipment leak provisions by virtue of Subpart I of 40 CFR 63.
However, Subpart I only applies to certain HAP, and not
necessarily all HAP that are used in the production of the listed
products.  For example, in the production of styrene butadiene
rubber using a solution process, the HAP monomers used are
styrene and butadiene, and the reaction takes place in an organic
solvent, most commonly the HAP hexane.  At a styrene butadiene
rubber by solution facility, the components in  styrene and

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                                15

butadiene service would be subject to the HON equipment leak
requirements, while the components in hexane service would not.
Table 4 summarizes the applicability of Subpart I to elastomer
subcategories.

     The baseline control level information shown in Attachment 5
does not include the effects of Subpart I.  The Subpart I impacts
were incorporated as follows.  First, an estimate was obtained of
the total number of components in HAP service for each
subcategory, using the detailed information submitted in response
to the December 1991 Section 114 questionnaire.  The total
component population was separated into components that would be
subject to Subpart I and those components that would not.  The
percentage of HON-subject components was applied to each
component type at each facility.

     For example, for the styrene butadiene latex subcategory,
the 9 facilities receiving the December 1991 Section 114
questionnaire reported just over 56,600 total components in HAP
service.  Of these, around 34,000 (60 percent) were in either
styrene or butadiene service.  Therefore, for a SBL facility that
reported valves in light liquid service, it was assumed that
60 percent would be subject to Subpart I (styrene or butadiene
service), and that 40 percent would be subject to the baseline
control level for that facility shown in Attachment 5.

Calculate baseline HAP emissions

     For each facility, equipment leak emissions were calculated
using the following equation:
                            1,000


where:
     ^eqlk =     HAP equipment leak emissions, Mg/yr
     WFHAP =   Weight fraction of HAP in the stream, assumed to
               equal 1.0
     HRS  =    Hours of operation per year, assumed to equal
               8,760 hrs/yr
     EFj  =     Emission factor for component type i,
               kg/hr/component, adjusted for control (discussed
               below)
     N;  =      Number of component type i's in HAP service

     The basic uncontrolled emission factors used were taken from
the Protocol Document.6  To adjust for control,  control
effectiveness values were obtained from the Protocol Document.7
For example, the emission factor for valves in light liquid
service is 0.00403 kg/hr/valve, and the control effectiveness for
a quarterly LDAR program with a 10,000 ppmv leak definition is
61 percent.  Therefore, the emission factor, adjusted for
control, would be calculated as follows:

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                                   16
        TABLE  4.   SUMMARY OF SDBPART I  APPLICABILITY TO
                ELASTOMER  PRODUCTION  SUBCATE6ORIES
Elastomer
Subcategory
Hypalon™
Polybutadiene and
Styrene Butadiene
Rubber by Solution
Styrene Butadiene
Latex
Styrene Butadiene
Rubber by Emulsion
Polysulfide Rubber
Subject HAP's
carbon
tetrachlor ide ,
chloroform"
styrene,
butadiene
styrene,
butadiene
styrene,
butadiene
ethylene
dichloride*
Other HAP's used
none identified
hexane, toluene,
methanol
acrylic acid,
aery lonitrile ,
cumene,
ethylbenzene,
formaldehyde,
methanol,
vinylidene
chloride
none identified
none identified
Percentage of
total
components
covered by
Subpart I
100%

60%
100%
0%b
*  In Subpart  I,  Hypalon™  is  in  a  paragraph with several other products.
In   addition  to   the   pollutants   listed  above,   methylene  chloride,
tetrachloroethylene, and ethylene dichloride components would be covered if
they were used in the production of Hypalon™.

b  While  Subpart  I  applies to facilities producing Polysulfide  Rubber, the
definition of  polysulfide rubber in  Subpart I describes a process no  longer
used by any facility in the United States.  Therefore,  it was assumed that
Subpart I would  not affect the Polysulfide Rubber subcategory.

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  EFgu.i0,000 = (0.00403 kg/hr/valve) (1-0.61)  = 0.00157 kg/hr/valve

     However,  the Protocol document does not list control
efficiencies for all control levels reported by elastomer
facilities.   Therefore, it was necessary to develop emission
factors for  all reported situations.  During the EPA's
development  of regulations for the thermoplastics industry
(Polymers and Resins IV),  the information from the Protocol
document was used to estimate emission factors for a wide range
of potential control levels.8  The  documentation of these
factors,  which is contained in Attachment 6,  were used in this
analysis.

Summary of Equipment Leak Baseline Emission Estimates

     The baseline equipment leak HAP emission estimate are
provided in  Table 5.  Emissions by component type are provided in
Attachment 7.

SUMMARY

     The baseline emissions, by emission source type and by
subcategory,  are presented in Table 6.  A plant by plant summary
is included  as Attachment 8.  As shown in the table, the source
categories with the highest HAP emissions are ethylene propylene
rubber and polybutadiene/styrene butadiene rubber by solution.
The largest  source of emissions is "back-end" process operations,
and the ethylene propylene rubber and polybutadiene/styrene
butadiene rubber by solution subcategories make up almost
75 percent of the total back-end process emissions.  In fact, the
back-end process emissions from these two subcategories make up
approximately one-third of the total baseline emissions from all
the elastomer subcategories.

     The baseline emissions from storage and wastewater
operations make up less than 10 percent of the total HAP
emissions for all subcategories.  Except for polysulfide rubber,
for which the single facility reported no emissions from any
emission source type other than 1 Mg/yr from storage, storage
emissions always made up less than 7 percent of the total
baseline emissions for the subcategory.  For wastewater, the two
latex subcategories (styrene butadiene and nitrile butadiene
latex) comprise over 70 percent of the total wastewater baseline
emissions.  The addition of the wastewater emissions from butyl
rubber production accounts for almost 85 percent of the total
wastewater baseline emissions.  For all other subcategories,
wastewater emissions constitute less than 7 percent of the total
subcategory baseline emissions.

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                          18
TABLE 5.  BASELINE HAP EMISSIONS FROM EQUIPMENT LEAKS
Facility
Baseline
Equipment Leak
HAP Emissions
(Mg/yr)
Butyl Rubber
BR-1
321.9
Epichlorohydrin
EPI-1
127.2
Facility
Baseline
Equipment Leak
HAP Emissions
(Mg/yr)

Ethylene Propylene Rubber - 1,087.7 Mg/yr
EPR-1
EPR-2
EPR-3
38.4
156.6
202.6
Halobutyl Rubber
HBR-1
268.5
Hypalon™
HYP-1
12.1
Neoprene - 120.2 Mg/yr
NEO-1
NEO-2
71.2
13.8
EPR-4
EPR-5
447.9
242.2

NEO-3
35.2

Nitrile Butadiene Latex - 49.2 Mg/yr
NBL-1
NBL-2
22.0
19.5
NBL-3
7.7

Nitrile Butadiene Rubber - 425.2 Mg/yr
NBR-1
NBR-2
52.9
161.6
NBR-3
NBR-4
45.8
164.9
Polybutadiene/styrene Butadiene Rubber by Solution-843.2 Mg/yr
PBR/SBRS-1
PBR/SBRS-2
PBR/SBRS-3
165.1
76.4
237.4
Polysulfide Rubber
PSR-1
0
PBR/SBRS-4
PBR/SBRS-5
174.8
189.5



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TABLE 5.  BASELINE HAP EMISSIONS  FROM EQUIPMENT LEAKS  (continued)
Facility
Baseline
Equipment Leak
HAP Emissions
(Mg/yr)
Facility
Baseline
Equipment Leak
HAP Emissions
(Mg/yr)
Butyl Rubber
Styrene Butadiene Latex - 443.8 Mg/yr
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-8
27.4
11.6
69.9
26.5
5.1
12.6
11.4
18.9
SBL-9
SBL-10
SBL-11
SBL-12
SBL-13
SBL-14
SBL-15
74.2
36.0
65.1
5.9
45.7
23.0
10.5

Styrene Butadiene Rubber by Emulsion - 83.2 Mg/yr
SBRE-1
SBRE-2
39.0
10.8
SBRE-3
SBRE-4
85.0
25.4

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                                                                  20
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REFERENCES
1.  Clean Air Act  (42 U.S.C. 7401 et. seq.,  as amended by P.L. 101-
549, 104 Stat.  2399) Section 114.

2.  Radian Corporation.  Draft Meeting Minutes of a September 22,
1993 meeting between the Styrene Butadiene Latex Industry and the
Environmental Protection Agency.  {Docket Item No. II-E-11}

3.  Radian Corporation.  Draft Meeting Minutes of a September 21,
1993 meeting between the Styrene Butadiene Rubber by Emulsion
Industry and the Environmental Protection Agency.  {Docket Item
No. II-E-7}

4.  Radian Corporation.  Draft Meeting Minutes of a September 22,
1993 meeting between the Ethylene Propylene Rubber and Nitrile
Butadiene Latex Industries and the Environmental Protection
Agency.  {Docket Item No. II-E-10}

5.  Protocol for Equipment  Leak  Emission Estimates.  EPA-453/R-93-
026. U.S. Environmental Protection Agency,  Research Triangle Park,
North Carolina.  June 1993.


6.  Protocol Document.  p.  2-10.

7.  Protocol Document, p. 5-2 and p. 5-8.


8.  Memorandum, from Meardon, K., Pacific Environmental Services,
to  Group  IV Resins  Docket No. A-92-45.   Determination  of MACT
Floors for Equipment Leaks.  March 24, 1995.

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    ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
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Facility PBR/SBRS-4
Process "Front End"
  flare
  Solvent Recovery Vents
  Butadiene washing
           Subtotal
Process "Back End"
  Dryer vents
  Dewatering vents
           Subtotal
      •  Facility Process Vent Total

Facility PBR/SBRS-5
Process "Front End"
  Flare exit
           Subtotal
Process "Back End"
  Drum Dryer Stacks
  Roof Fans
  Crumb Dryers
           Subtotal
        Facility Process Vent Total
PolysulfideRubber
Facility PSR-1
   No HAP Emissions Reported from Process Vents
Styrene Butadiene Latex

Facility SBL-1
  Control device outlet                   0.0
  Recovered water storage               0.0
        Facility Process Vent Total       0.1

Facility SBL-2
Controlled
Uncontrolled                          22.9
  Scrubber outlet                      22.9
  Cooling operation                     0.0
  Water purification                     0.0
        Facility Process Vent Total      22.9
Reported
Reported Control
Emissions Level
(Mg/yr) (%)
22.3 98
133.9
3.4
159.6
589.0
1826
771.6
931.2
4.5 98.5
4.5
471.0
0.8
563.9
1035.7
1040.2
Adjusted
Baseline
(Mg/yr)
22.3
133.9
3.4
159.6
589.0
1826
771.6
931.2
6.0
6.0
471.0
0.8
563.9
1035.7
1041.8
99.97
2.5
0.0
2.5
            0.0
           22.9
           22.9

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    ATTACHMENT!.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
                                            Reported
                                 Reported    Control    Adjusted
Facility SBL-3
  Control device outlet
  Adjusting Tank
        Facility Process Vent Total

Facility SBL-4
  Control device outlet
  Vent when TO down
        Facility Process Vent Total

Facility SBL-5
  Outlet from scrubber
        Facility Process Vent Total

Facility SBL-6
  Rec styrene concentrator
  Butadiene recovery
        Facility Process Vent Total

Facility SBL-7
  Control device outlet
  Building vent
        Facility Process Vent Total

Facility SBL-8
Controlled
  Misc fugitive sources
        Facility Process Vent Total

Facility SBL-9
  Control device outlet
  Reactor purge (maintenance)
  Knock-out pot maintenance
        Facility Process Vent Total

Facility SBL-10
  Control device outlet
  Reactor sampling
         Facility Process Vent Total

FacilitySBL-11
  Control device outlet
  inerts removal
         Facility Process Vent Total
Emissions
 (Mg/yr)

       0.0
       0.0
       0.0
                                              Level
       0.0
       0.2
       0.2
       1.8
       1.8
       0.0
       5.1
       5.1
       8.1
       0.3
       8.4
       3.0
       0.2
       3.1
       0.3
       0.1
       0.7
       1.2
       0.0
       0.0
       0.0
       0.7
       0.0
       0.8
       Baseline
        (Mg/yr)
99.99
99.99
   95
   99
 99.5
99.99
   98
8.4
0.0
8.4
0.6
0.2
0.8
             1.8
             1.8
             0.0
             5.1
             5.1
3.2
0.3
3.6
5.9
0.2
6.1
1.4
0.1
0.7
2.2
0.7
0.0
0.8
 0.7
 0.0
 0.8

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    ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
SBL-12
  Control device outlet
  Product filtration
  Production loading
        Facility Process Vent Total


FacilitySBL-13
  Control device outlet
  Styrene decanter
        Facility Process Vent Total

SBL-14
  Control device outlet
  Waste styrene handling
        Facility Process Vent Total


SBL-15
  Control device outlet
        Facility Process Vent Total
                                Reported
                                Emissions
                                 (Mg/yr)
0.6
0.2
0.2
1.1
0.1
0.1
0.2
0.0
0.0
0.0
1.1
1.1
    Reported
     Control
      Level
    98
  99.5
99.999
 99.99
       Adjusted
       Baseline
        (Mg/yr)
  0.6
  0.2
  0.2
  1.1
  0.6
  0.1
  0.6
 20.0
  0.0
 20.0
21ZO
2120

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    ATTACHMENT 1. STREAM BY STREAM SUMMARYOF PROCESS VENT EMISSIONS
                                 Reported
                                 Emissions
                                  (Mg/yr)
Styrene Butadiene Rubber by Emulsion
SBRE-1
Process "Front End"
  flare outlet                            4.2
  Charge tanks                          0.0
  Decanters                             0.1
  Cooling Towers                        2.0
            Subtotal                    6.3
Process "Back End"
  C Dryers                              8.4
  D Dryers                              8.8
  F Dryers                             18.2
  J Dryers                             20.7
  K Dryers                             22.5
  L Dryers                             22.3
  M Dryers                             22.4
  P Dryers                             23.0
  Q Dryers                             23.4
  S Dryers                              4.4
  Packaging/Shipping Fugitives           1.8
  Dryer Fugitives                       11.4
  Coagulation Fugitives                 64.3
            Subtotal                  251.5
        Facility Process Vent Total      257.8

Facility SBRE-2
Process "Front End"
  flare-reactor,  recover, storage
  boiler - recovery
            Subtotal
Process "Back End"
  Dryers                               72.7
            Subtotal                   72.7
        Facility Process Vent Total       72.8
Reported
 Control
  Level
       98
Adjusted
Baseline
 (Mg/yr)
      4.2
      0.0
      0.1
      2.0
      6.3

      8.4
      8.8
     18.2
     20.7
     22.5
     22.3
     22.4
     23.0
     23.4
      4.4
      1.8
     11.4
     64.3
    251.5
    257.8
0.0
0.0
0.0
99.99
99.99

3.6
3.6
7.3
                72.7
                72.7
                80.0

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    ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Facility SBRE-3
Process "Front End"
  Butadiene recovery vent
           Subtotal
Process "Back End"
  Dryer A
  DryerB
  Dryer C
  Coag Line
  Process Bid Vents
           Subtotal
        Facility Process Vent Total

Facility SBRE-4
Process "Front End"
  flare outlet
  Coagulation tank - D
  Coagulation tank - C
  Coagulation tank - CC
  Coagulation tank - B
  Coagulation tank - A
           Subtotal
Process "Back End"
  Dryer A
  Dryer B
  DryerC
  DryerD
  Dryer E
  Dryer F
  Dryer G
  Dryer H
  Dryer I
  Dryer J
  Dryer K
  DryerL
  DryerM
  DryerN
  Dryer P
  DryerR
  DryerS
  DryerT
           Subtotal
        Facility Process Vent Total
Reported
Reported Control
Emissions Level
(Mg/yr) (%)
3.5
3.5
26.5
40.7
46.5
29.2
5.2
148.1
151.6
0.4 98
0.5
0.4
0.2
0.4
0.4
2.5
6.5
9.9
12.0
16.1
33.3
32.2
65.3
47.1
3.2
6.3
32.6
36.7
3.3
6.2
11.6
18.0
19.4
19.7
379.3
381.7
Adjusted
Baseline
(Mg/yr)
3.5
3.5
26.5
40.7
46.5
29.2
5.2
148.1
151.6
0.4
0.5
0.4
0.2
0.4
0.4
2.5
6.5
9.9
12.0
16.1
33.3
32.2
65.3
47.1
3.2
6.3
32.6
36.7
3.3
6.2
11.6
18.0
19.4
19.7
379.3
381.7

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              Attachment 2

Wastewater emission calculation example

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                          ATTACHMENT 2
      Example - Wastewater Emission Calculation Methodology

Assume 3 plants in subcategory

Production information
     Plant A:  1,000 tons/year
     Plant B:  1,500 tons/year
     Plant C:    750 tons/year

Submitted wastewater information

Plant A:  3 streams identified
     Stream 1: originates from reactor {reaction area}
                    styrene concentration:  350 ppm
                    butadiene concentration: 800 ppm
                    flow rate:  2 1pm
     Stream 2: originates from decanter following stripper
               {stripping/material recovery area}
                    styrene concentration: 350 ppm
                    flow rate:  15 liters/min
                    stream routed to steam stripper
     Stream 3: originates from dewatering screen {finishing area}
                    styrene concentration:  50 ppm
                    flow rate:  125 liters/min

Plant B:  2 streams identified in process flow diagram, but no
          flow and concentration data provided.  Also no control
          shown on flow diagram.
     Stream 1: originates from decanter following stripper
               {stripping/material recovery area}
     Stream 2: originates from dewatering screen {finishing area}

Plant C:  no wastewater information provided

Step 1:  Identify wastewater streams

     For Plants A and B, the wastewater streams were those
identified in the information submitted.  Based on the
information submitted by these facilities, it appears that it is
common for facilities in the subcategory to have wastewater
streams that originate from the stripping/material area
(decanter) and the finishing area  (dewatering screen).
Therefore, two wastewater streams are assigned to Plant C
originating from these two locations.

Step 2:  Obtain/estimate stream characteristics

     For Plant A, the stream characteristics provided were used.
For Plants B and C, the stream characteristics were extrapolated
from the information provided by Plant A.
                               2-1

-------
Plant B:
     Stripping/material recovery stream
           styrene concentration  - 350 ppm
           flow rate - (15 1/min)  x (1,500/1,000) =22.5 1/min
     Finishing area stream
           styrene concentration  - 50 ppm
           flow rate - (125 1/min)  x (1,500/1,000)  = 187.5 1/min

Plant C:
     Stripping/material recovery stream
           styrene concentration  - 350 ppm
           flow rate - (15 1/min)  x (750/1,000) = 11.25 1/min
     Finishing area stream
           styrene concentration  - 50 ppm
           flow rate - (125 1/min)  x (750/1,000) =  93.75 1/min

Step 3:   Calculate uncontrolled  HAP emissions

Plant A;

Reactor  stream
     Estyrene =   (5.26 x 10"4) (350  ppm styrene) (2  1/min) (0.8a)  =
                0.3 Mg/yr

     Ebutadiene =  (5-26 x ID"4) (750  ppm butadiene) (2  1/min) (0.95b) =
                0.75 Mg/yr

     EtotalHAP =  °'3 + °'75 =  i-05 M9/Yr

Stripping/material recovery  stream
     Estyrene =   (5.26 x 10^) (350  ppm styrene) (15  1/min) (0.8) =
                2.2 Mg/yr
Finishing stream
      ^styrene
Estvrene =    (5.26 x 10"4) (50 ppm  styrene) (125 1/min) (0.8)
                2.6 Mg/yr

Plant  B;
Stripping/material recovery stream

      ^styrene
Estvrene =    (5.26 x 10"4) (350 ppm styrene) (22.5  1/min) (0.8) =
                3.3 Mg/yr

Finishing stream
      Estyrene =   (5.26 x  10"4) (50 ppm styrene) (187.5 1/min) (0.8)  =
                3.9 Mg/yr
     '  Fraction emitted (Fe) value for styrene from Table XX of Subpart G of
the HON.

     bFraction emitted  (Fe) value for 1,3-butadiene from Table XX of Subpart G
of the HON.


                                 2-2

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        Plant C:
        •Stripping/material recovery stream
             Estyrene =    (5.26 x 1CT4) (350 ppm  styrene) ( 11 . 25 l/min)(0.8)  =
                        1.7 Mg/yr

•      Finishing stream
             Estyrene "    (5.26 x 1CT4) (50 ppm styrene) (93 . 75 l/min)(0.8)  =
—                      2.0 Mg/yr

•      Step 4:  Identify controls and calculate  HAP  emissions after
        control

£      The only stream for which control was  identified was the
        stripping/material stream at Plant A.   The controlled emissions
M      for this stream were calculated as follows:

        Econtroiied
                = (2.2 Mg/yr  styrene)  x (1 - 0.99C)  = 0.022 Mg/yr
        Summary

             The attached table summarizes the  wastewater emissions  for
        this subcategory.
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             Ic  Fraction remmoved (Fr) value for styrene from Table XX of Subpart G of
        the HON.

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                                         2-3

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•                                Attachment 3
           Stream by stream breakdown of  baseline wastewater  emissions
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-------
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•                                 Attachment 1
            Vent-by-vent breakdown of baseline  process vent emissions
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                         t

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    ATTACHMENT!.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Butyl Rubber
Facility BR-1
Process "Front End"
  Flare exit - methyl chloride             1.0
  Flare exit (HCI)                      146.8
  Maintenance Operations Vent         216.4
            Subtotal                 364.2
Process "Back End"
  Dryer Operations Vent               109.5
            Subtotal                 109.5
        Facility Process Vent Total      473.8

Epichlorohydrin
Facility EPI-1
Process "Front End"
  Flare tower outlet                     0.4
            Subtotal                   0.4
Process "Back End"
  French Press/Shaker Screen           16.2
  Tunnel Dryer                          0.3
            Subtotal                  16.5
        Facility Process Vent Total       16.8

Ethylene Propylene Rubber
EPR-1
Process "Front End"
  Raw hex strip                        10.0
  Recycled hex dry                     2.9
  Sampling                            0.5
  Samp Drying                         4.0
  Sampling                            0.9
            Subtotal                  18.3
Process "Back End"
  Dryers                              12.5
  Dryers                             11Z6
  Dryers                             300.8
  Dryers                             300.8
  Dewater                           401.0
            Subtotal                 1127.7
        Facility Process Vent Total      1146.0
Reported
Emissions
(Mg/yr)
Reported
Control
Level
(%)
Adjusted
Baseline
(Mg/yr)
99.5
  99
  4.2
146.8
216.4
367.4

109.5
109.5
476.9
  0.7
  0.7

 16.2
  0.3
 16.5
 17.2
           10.0
            2.9
            0.5
            4.0
            0.9
           18.3

           12.5
          1126
          300.8
          300.8
          401.0
         1127.7
         1146.0

-------
    ATTACHMENT 1. STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Facility EPR-2
Process "Front End"
  Monomer pure (boiler) - hex
  Monomer pure (flare) - hex
  Reactor sampling
  Boiler out - HCI
  Flare out - HCI
           Subtotal
Process "Back End"
  Finishing vent
           Subtotal
        Facility Process Vent Total

Facility EPR-3
Process "Front End"
  flare exit
  Slurry tank
  Slurry tank
  Slurry tank
           Subtotal
Process "Back End"
  Shaker screen
  Dewaterer
  Dryer/Hot Box
  G-Stack
           Subtotal
        Facility Process Vent Total
Reported
Reported Control
Emissions Level
(Mg/yr) (%)
0.1 99.5
0.0 99.5
12.3
69.1
8.6
90.1
348.6
348.6
438.7
1.8 98
1.4
0.8
1.1
5.1
0.6
0.4
15.3
20.6
36.8
41.9
Adjusted
Baseline
(Mg/yr)
0.2
0.0
12.3
69.1
8.6
90.2
348.6
348.6
438.9
1.8
1.4
0.8
1.1
5.1
0.6
0.4
15.3
20.6
36.8
41.9

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    ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Facility EPR-4
Process "Front End"
 flare exit
 Sampling
 chromat vent
 solvent recover
            Subtotal
Process "Back End"
 E9.13
 £11,15
 E12
 E16
 E17
 E23.28
 E24.29

 £26^30
 E33.35
 E34.36
 E37.38
 E39.40
 E41.43
 E42.44
 ES7.S8
            Subtotal
        Facility Process Vent Total

Facility EPR-5
Process "Front End"
 reactor vent to flare
 EN slop tanks
 in-process tanks
 coagulation /stripping
            Subtotal
Process "Back End"
 expellers
 dryers
            Subtotal
        Facility Process Vent Total
Reported
Reported Control Adjusted
Emissions Level Baseline
(Mg/yr)
2.8
33.1
18.3
1.1
55.3
25.6
69.9
13.6
8.9
4.7
11.9
6.2
17.1
46.6
20.9
11.5
15.2
37.8
75.8
26.2
21.6
413.6
468.8
0.0
1.1
18.1
6.4
25.6
14.0
54.4
68.4
94.0
(%) (Mg/yr)
99.8 28.2
33.1
18.3
1.1
80.6
25.6
69.9
13.6
8.9
4.7
11.9
6.2
17.1
46.6
20.9
11.5
15.2
37.8
75.8
26.2
21.6
413.6
494.2
99.99 0.1
1.1
18.1
6.4
25.7
14.0
54.4
68.4
94.0

-------
ATTACHMENT 1. STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Halobuty! Rubber
Facility HBR-1
Process "Front End"
  Flare exit
     hexane
     methyl chloride
     HCI
            Subtotal
Process "Back End"
  Finishing
            Subtotal
        Facility Process Vent Total

Hypalon
Facility HYP-1
Process "Front End"
  EPN-112
  BLW-338
            Subtotal
Process "Back End"
  Dryer
  Dryer
  Dryer
  Dryer
            Subtotal
        Facility Process Vent Total

Neoprene
Facility NEO-1
Process "Front End"
  Stripper Vents
  Kettles
  Chloroprene Refining
  Water Wash
  Blend Tank
            Subtotal
Process  "Back End"
  Dryer Hot Compart
  Dryer Cool
            Subtotal
        Facility Process Vent Total
Reported
Emissions
(Mg/yr)
Reported
Control
Level
(%)
Adjusted
Baseline
(Mg/yr)
                                  1 3.7
                                  80.9
                                305.0
                                399.6

                                280.5
                                280.5
                                680.1
                                 49.8
                                   0.0
                                 49.8

                                   4.9
                                 12.1
                                   7.0
                                   4.6
                                 28.6
                                 78.4
                                 1625
                                  32.1
                                  19.7
                                   6.1
                                   1.5
                                 222.0

                                  34.5
                                   0.0
                                  34.5
                                 256.6
99.5
99.5
 54.9
323.6
305.0
683.5

280.5
280.5
964.0
          49.8
            0.0
          49.8

            4.9
          12.1
            7.0
            4.6
          28.6
          78.4
          1625
           32.1
           19.7
            6.1
            1.5
          2220

           34.5
            0.0
           34.5
          256.6

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   ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
Facility NEO-2
Process "Front End"
  BCD Tank Car Unload
  CD Column Cond
  CD Column Heels
  Incinerator
  HCI Fume Scrubber
  Chlorine scrubber
  TCB Still
  Chlorine car scrubber
  Poly Kettles w/o condensers
  Poly Kettles with condensers
  Stabilizer Tanks
           Subtotal
Process "Back End"
  Aging Tanks
  Aging Tanks
  Strippers
  Emulsion Storage Tanks
  Dryers
  Dryers
  Dryers
  Dryers
  Product Storage
           Subtotal
        Facility Process Vent Total

Facility NEO-3
Process "Front End"
  V-1
  V-2
  V-3
  V-4
  V-8
  V-9
            Subtotal
Process "Back End"
  V-19
            Subtotal
        Facility Process Vent Total
Reported
Reported Control
Emissions Level
(Mg/yr) (%)
1.0
17.5
15.4
0.4
1.4
0.1
2.0
0.0
30.2
39.1
1.2
108.3
6.0
8.6
44.9
45.4
25.0
8.3
1.8
9.8
0.2
150.0
258.3
9.0
1.9
5.5
1.5
2.3
1.3
21.3
18.9
18.9
40.3
Adjusted
Baseline
(Mg/yr)
1.0
17.5
15.4
0.4
1.4
0.1
2.0
0.0
30.2
39.1
1.2
108.3
6.0
8.6
44.9
45.4
25.0
8.3
1.8
9.8
0.2
150.0
258.3
9.0
1.9
5.5
1.5
2.3
1.3
21.3
18.9
18.9
40.3

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    ATTACHMENT 1. STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
                                            Reported
                                 Reported   Control   Adjusted
Nitrite Butadiene Latex
Facility NBL-1
Process "Front End"
  flare exit
  building vent
         Facility Process Vent Total

Facility NBL-2
Process "Front End"
  flare exit
  misc small vents
         Facility Process Vent Total

Facility NBL-3
Process "Front End"
  flare outlet
  product filter
  product storage
  product loading
         Facility Process Vent Total

Nitrile Butadiene Rubber
Facility NBR-1
Process "Front End"
  flare outlet
            Subtotal
Process "Back End"
  B Dryers
  T Dryers
  Dryer Fugitives
  FUG-MP
  Coagulation Fugitives
  W
            Subtotal
         Facility Process Vent Total
                                 Emissions
                                  (Mg/yr)
  5.5
  0.4
  5.9
0.002
0.000
0.002
  0.5
  0.2
  0.2
  0.2
  0.9
  0.7
  0.7

  2.7
  0.8
  0.2
  0.7
  2.8
  2.0
  9.1
  9.8
        Level    Baseline
         (%)      (Mg/yr)
95
95
98
98
  2.2
  0.4
  2.6
0.001
0.000
0.001
  0.5
  0.2
  0.2
  0.2
  0.9
  0.7
  0.7

  2.7
  0.8
  0.2
  0.7
  2.8
  2.0
  9.1
  9.8

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   ATTACHMENT 1. STREAM BY STREAM SUMMARYOF PROCESS VENT EMISSIONS
Facility NBR-2
Process "Front End"
  Pre-Mix
  Reactor
  Slowdown
  Recovery
  Blend Tanks
  Fugitives
            Subtotal
Process "Back End"
  Batch Coag/Wash
  Feed/Settle Tank
  Drying-Steam Jet
  #1 Spray Feed
  #1 Spray Dryer
  #2 Spray Feed
  #2 Spray Dryer
  National Coag/Wash
  National Dewater Rm
  National Dryer
  F-Dewater
  F-Dryer
            Subtotal
        Facility Process Vent Total

Facility NBR-3
Process "Front End"
  Dilute Acrylonitrile Accumulator
  BD recover scrubber outlet
            Subtotal
Process "Back End"
  Flocculator
  Flocculator
  Drying
            Subtotal
        Facility Process Vent Total
Reported
Reported Control
Emissions Level
(Mg/yr) (%)
1.2
0.0
1.8
2.0
4.5
19.2
28.8
0.2
0.2
2.2
0.9
6.5
0.0
47.6
4.6
1.5
24.1
0.1
6.6
94.7
123.4
1.0
1.8
2.8
7.5
2.2
0.7
10.5
13.3
Adjusted
Baseline
(Mg/yr)
1.2
0.0
1.8
2.0
4.5
19.2
28.8
0.2
0.2
2.2
0.9
6.5
0.0
47.6
4.6
1.5
24.1
0.1
6.6
94.7
123.4
1.0
1.8
2.8
7.5
2.2
0.7
10.5
13.3

-------
    ATTACHMENT 1.  STREAM BY STREAM SUMMARY OF PROCESS VENT EMISSIONS
                                          Reported
                                Reported   Control    Adjusted
                                Emissions
                                 (Mg/yr)
            Level
0.0
0.0
0.1
0.1
0.4
0.4
0.5
99.99
99.99
Facility NBR-4
Process "Front End"
 flare-reactor, recover, storage
 boiler - recovery
 AN water stripper exit
            Subtotal
Process "Back End"
 Dryers
            Subtotal
        Facility Process Vent Total
Polybutadieneand Styrene Butadiene Rubber by Solution
Facility PBR/SBRS-1
Process "Front End"
  Incinerator outlet
  880 crumb tank chiller
  840 crumb tank chiller
            Subtotal
Process "Back End"
  Dryer Beds
  Dryer Beds
  Finishing room exhausts
  Finishing room exhaust
  Finishing room exhausts
            Subtotal
        Facility Process Vent Total

Facility PBR/SBRS-2
   No HAP Emissions Reported from Process Vents
    Baseline
    (Mg/yr)
Facility PBR/SBRS-3
Process "Front End"
Process "Back End"
Boiler exit
Cond. outlet (crumb storage)
            Subtotal
None Reported

     186.3
      19.3
     205.5
90
95
                           3.6
                           1.8
                           0.1
                           5.5

                           0.4
                           0.4
                           5.9
1.6
0.01
0.01
1.6
1.1
0.9
166.2
115.2
107.0
390.4
3921
99 3.2
0.0
0.0
3.2
98 1.1
98 0.9
166.2
115.2
107.0
390.4
393.7
        Facility Process Vent Total      205.5
186.3
 19.3
205.5
205.5

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                   Equipment leak emission calculation example
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1
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•






ATTACHMENT 4
Example - Equipment Leak Emission Calculation Methodology
1

•
™

1
Assume 3 plants in subcategory
Assume that category is not subject
Capacity information
Plant A: 1,500 Mg/year
Plant B: 2,000 Mg/year
Plant C: 1,000 Mg/year
.
to Subpart I










Submitted equipment leak information
1

1

1

I




















,
1

1

1
Plant A:
Component Type
Gas Valves
Liquid valves
Pump seals (light liquid)
Compressor seals
Pressure relief valves
Flange/ connectors
Open-ended lines

Sampling connectors
Plant B:

Component Type
Gas Valves

Liquid valves
Pump seals (light liquid)

Compressor seals
Pressure relief valves

Flange/ connectors
Open-ended lines
Sampling connectors
Plant C:

No information submitted
Other pertinent information
Plants A and C are located in
equipment leak regulation exists.
4-1


Number
3,000
2,000
35
10
50
7,500
100

15


Number
6,000

2,500
55

30
25

13,000
400
5





Baseline Control
Q-10000
Q-10000
Q-10000
Q-10000
Rupture Disk
—
—

—


Baseline Control
M-10000

M-10000
Q-10000

Q-10000
Q-10000

Q-10000
Capped
Closed Loop




the same State, where an
Plant A is in


compliance.



-------
Step 1:  Obtain/estimate component counts

     Component counts were provided by Plants A and B.   Estimates
were made for Plant C by multiplying the average number  of
components per unit of capacity, calculated from Plants  A and B,
by Plant C's capacity.

Plant A
Plants
Avg if/cop
Plant C
Capacity
(Motor)
1,500
2.000

1,000
Gas
Valvee
# #/cap
3000 2.000
6000 3.000
2.500
2500
Uq
Valvee
# f/cap
2000 1.333
2500 1.250
1.292
1292
Pump
Seals
* #/bap
35 0.023
55 0.028
0.025
25
Comp
Seals
* #/cap
10 0.007
30 0.015
0.011
11
Frees FKf
VaM»
* #/bap
50 0.033
25 D.013
0.023
23
Ranges/
connectors
# #/C8P
7500 5.000
13000 6.500
5.750
5750
Open-end
Unas
* #/cap
100 0.067
400 0.200
0.133
133
Sampling
connectors
* #A*>
15 0.010
5 0.003
0.006
6
 Step  2:   Identify/estimate existing level of control

      Plants A  and B provided control levels.  Plant A and Plant C
 are located in the same State,  which has an equipment leak
 regulation.  Therefore, the control level for Plant C was assumed
 to be equal to that of Plant A (and the State regulation).

 Step  3:   Calculate baseline HAP emissions

      From the  Pacific Environmental Services, Inc.  (PES)
 memorandum contained in Attachment 5, the following emission
 factors were obtained that correspond to the control levels
 reported by the facilities.  (The units were converted to
 kilograms pounds, which were the units in the PES memorandum).

Uncontrol
Q— 10000
M-10000
RuptDisk
Cap Lines
Gas
Valves

0.00183
0.00075


Compc
Liq
Valves

0.00138
0.00064


merit— spc
Pump
Seals

0.01089



jcific emis
Comp
Seals

0.15268



sion facto
Press Rlf
Valves

0.05806

0

re (kg/hr/s
Flange/
connects
0.00183
0.00016



tource)
Openend
Lines
0.0017

0


Sample
connects
0.01497




      The number of a particular  type  of  component was then
 multiplied by the appropriate  emission factor (assuming 8,760
 hours per year and a HAP concentration of 1.0)  to obtain the
 annual baseline emissions for  each component type.  For instance,
 for gas valves at Plant A:
         _ (1.0%HAP) (87 6 Ohrs/yr)
                l, 000kg/Mg
(3,000 valves) = 48Afgr/yr
                                 4-2

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       The following table shows baseline  equipment leak emissions
  for the example facilities, by component.   The stun of HAP
  emissions for all component types represents  the total baseline
  emissions for equipment leaks.
Plant A

PlantB

Plant C
Baseline HAP Emissions (Mg/yr)
Gas
Valves
48.0
39.3
40.0
Liq
Valves
24.2
14.0
15.7
Pump
Seals
3.3
5.2
2.4
Comp
Seals
13.4
40.1
14.5
Press Rlf
Valves
0.0
12.7
0.0
Flange/
connects
120.1
18.0
92.1
Openend
Lines
1.5
0.0
2.0
Sample
connects
2.0
0.0
0.8
TOTAL
212.5
129.5
167.5
                                  4-3

-------

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•                                Attachment 5
                     Baseline equipment leak control levels
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I                                 Attachment  6
                Documentation of  equipment  leak  emission factors
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ODEI7  dD

  PACIFIC ENVIRONMENTAL SERVICES, INC.
              Central Park West
        5001 South Miami Boulevard
                 PO Box 12077
Research Triangle Park. NC 27709-2077
   (919)941-0333 FAX (919) 941-0234
                                      MEMORANDUM


     TO:         Group IV Resins Docket No. A-92-45

     FROM:      Ken Meardon
                  Pacific Environmental Services, Inc.

     DATE:      March 24, 1995

     SUBJECT:   Determination of MACT Floors for Equipment Leaks
           The purpose of this memo is to describe the methodology used to calculate the
     MACT floors for the source categories covered by the Group IV Resins national
     emission standards for hazardous air pollutants (NESHAP).  The same basic
     methodology, as described below, was used for each source category/subcategory.

     Basic Methodology


           The basic methodology consisted  of estimating uncontrolled equipment leak
     emissions, identifying the level of control at each facility based on that facility's  specific
     leak and detection repair (LDAR) program (if one was in place), applying the
     "controlled" equipment leak factors to estimate emissions  after control, and then
     calculating the percent emission reduction achieved at each facility within each  source
     category/subcategory.  The information on the percent reduction achieved by the specific
     programs was then used to determine the MACT floors for each source
     category/subcategory.

           Each individual plant was grouped with all other plants on the basis of the type of
     polymer or resin produced.  Where a plant produced polymers or resins in more than
     one source category/subcategory, the equipment components were separated, where
     possible, according to the type of polymer or resin.  If this was not possible,  then all of
     the components were included in each applicable source category/subcategory for
     purposes of determining the MACT floors.

           Estimating Uncontrolled Emissions


           This step required determining (1) the equipment component counts  at each plant
     and (2)  the emission factors for each component category (e.g., valve in gas  service,
     pump in light liquid service).
                        WASHINGTON D C • RESEARCH TRIANGLE PARK NC • LOS ANGELES CA • CINCINNATI OH

-------
      A number of facilities provided information on the component counts at a plant.
Where these counts were provided, they were used directly in the estimation.

      For facilities that did not provide equipment component counts, an estimate had
to be made for each component type. There are many variables that affect the number
of components at a facility. Such variables include, but are not limited to, the age of the
facility, the number of process lines, and the capacity of each line and of the facility.
Thus, for example, it is generally recognized that the number of components and thus
emissions are related to the capacity of a facility. However, sufficient information was
not available to perform any sophisticated analysis for estimating the number of
components for those facilities.

      The available information on equipment components was  identified and estimates
of the number of each component was made in terms of component per process line and
component per design capacity. The results of this analysis showed, that for this industry,
but unlike for the synthetic organic chemical industry (SOCMI), estimating the number of
components by components-per-capacity was not necessarily unreasonable.  The size of
individual process lines within a subcategory was fairly similar and many of the facilities
are of the same generation.  Therefore, for estimation purposes,  it was decided to use
the information provided on individual facilities within the source category/subcategory,
calculate an average count for each component type, and then ratio the design capacity
of the target plant  with the average design capacity of the plants that provided actual
equipment counts.

      To estimate uncontrolled emissions, the emission factors reported in the 1993
Protocol document1 were used.  These factors were used to provide a consistent baseline
for  estimating the impact of various LDAR programs in use in the source categories.
For the several facilities that provided specific and clear  information, the  estimates of
emissions were adjusted to account for low HAP concentrations and reduced hours of
operation.

       Identifying Level of Controls

      A number of facilities provided information on the control programs being used to
reduce emissions from equipment leaks.  Other facilities  simply identified a LDAR
program, but did not provide any details.  Still other facilities did not indicate any control
programs for equipment leaks.

      For facilities that provided information on the specific programs, these programs
were used directly.  For facilities that indicated that a LDAR program was being used,
      U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards.
Protocol for Equipment Leak Emission Estimates.  EPA-453/R-93-026, June 1993.

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but did not provide specifics, the State regulation that appears to be applicable to the
plant was used to estimate the specifics. In most cases, this resulted in assuming a CTG-
like level of control. In one or two instances, a LDAR program was indicated, but no
State program could be identified. It is assumed that the LDAR program was therefore
due to plant policy. For facilities that did not indicate any programs for equipment leaks,
no control was assumed unless the facility was located in a State with a LDAR program
that was  obviously directed toward that plant or type of plant.

      Controlled Emission Factors

      The controlled emission factors associated with various LDAR programs used in
determining the MACT floors are summarized in Table 1. Table 2 shows the percent
reduction of the controlled emission factors over the uncontrolled emission factors. In
most instances, the controlled emission factors are based primarily on information found
in the 1993 Protocol document.  The footnotes  to Table 1 detail the derivation of the
controlled emission factors.

      Calculation of Emission Reduction and Controlled Emission Rates

      Using the equipment component counts, uncontrolled emission factors, and
controlled emission factors, the amount of emission  reduction achieved by component
and for the entire plant was calculated for each plant. The percent emission reductions
were then calculated.  Table 3 summarizes the estimated  percent reductions for each
facility within each source category/subcategory.

MACT Floor Determination

      MACT floors were then determined for existing and new facilities within each
source category/subcategory.  For source categories  with less than 5 source categories all
of the facilities were used to estimate the MACT floor. The MACT floor was calculated
by taking the average of the percent emission reductions achieved by each of the
facilities. Thus, for example, the four facilities producing ABS using the batch emulsion
process were estimated to reduce equipment leak emissions by 91.2, 84.1, 82.0, and 79.5
percent.  The average of these four percent reductions is 84.2 percent, which was used to
represent the MACT floor for existing sources in this subcategory.

      For source categories/subcategories with more than five facilities,  the five facilities
with the  highest percent reductions were identified,  and the MACT floor was calculated
as the average percent reduction achieved by these  five facilities. For example, the top
five polystyrene facilities using a continuous  process were identified as achieving 85.8,
81.9, 80.8, 79.6, and 78.6 percent reduction.  The average of these five percent reductions
is 81.3 percent.

-------
      For new facilities, the MACT floor was identified as the best performing facility
within the source category/subcategory based on the estimated percent reduction.  For
example, in the ABS, batch emulsion source category, the Monsanto, Addyston, OH,
facility was  estimated to be reducing equipment leak emissions by 91.2 percent. This was
then selected as the MACT floor for new sources in this subcategory.

      In all cases, the MACT floors estimated for existing and new sources were
equivalent to or less stringent than the HON.

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FOOTNOTES TO TABLE 1

" V = valves; P = pumps; PRVs = pressure relief valves; OELs = open-ended lines;  Comp.  = compressors; Samp.  Conn.
  sampling connections; G = gas service; LI = light liquid service; HL = heavy liquid service.
  U.S. Environmental Protection Agency.  Protocol for Equipment Leak Emission Estimates.  EPA-453/R-93-026.
  1993.  page 2-10. (1993 Protocol document).  Converted from kg/hr to Ibs/hr by:   kg/hr x 2.2 = Ibs/hr.
June
c Estimated be averaging uncontrolled emission factors and emission factors for quarterly LDAR with leak definition of
  10,000 ppm. For example, for valves in gas service:  (0.0131 + 0.0043)/2 » 0.0087 Ibs/hr.  For some components, this
  is a conservative estimate as annual programs may not be effective in reducing emissions.

d Derivation of emission factors based on taking known values (shown in double-lined boxes in the following tables),
  bounding unknown values, and taking mid-points as estimates of unknown emission factors.  The first table shows
  known and estimated leak frequencies.  The second table shows the known and estimated emission factors.  These
  values were based upon the 1993 Protocol document data and equations, and apply only to connectors in gas/vapor
  service and to connectors in light liquid service.


                                              CONNECTOR LEAK FREQUENCIES
LOAR PERIOD

Annual
Quarterly
Monthly
Uncontrolled
LEAK DEFINITION (ppm)
500
0.25
0.125
0.063
3.9
1000
0.213
0.106
0.053
3.78
10000
0.138
0.069
0.0345
1.55
Uncontrolled



1.55
                                          CONNECTOR EMISSION FACTORS (Ibs/hr)
LDAR PERIOD

Annual
Quarterly
Monthly
Uncontrolled
LEAK DEFINITION (ppm)
500
0.000286
0.000166
0.000102

1000
0.000334
0.000194
0.000124

10000
0.00052
0.000349
0.000264

Uncontrolled



1-55 |
  Detailed Discussion

         For  annuaI  LDAR,  the leak frequency and emission  factor at  500 ppm are known (0.25X and 0.000286  Ibs/hr).  As
  leak definition goes from  500 to 1000, the leak frequency will decrease.  We also know that the emission factor will
  increase as the leak frequency  increases  (within the same LDAR monitoring period).  Using this information, emission
  factors for 1,000 and 10,000 ppm were calculated as follows:

         Annual  at 1.000 pan.  The leak  frequency at  1,000 ppm will  be less than 0.25X. Using  this  leak frequency and
  the appropriate equation from page 5-19 of the 1993 Protocol  document, we can calculate a "maximum" emission factor,
  which  is calculated to be  0.00017 kg/hr.  Next, the emission  factor at 1,000 ppm must be greater than that at 500
  ppm, which we know to be 0.000134 kg/hr.  These two emission  factors "bound" the estimate for annual LDAR at 1,000
  ppm.   The emission factor  for 1,000 ppm was then estimated as the mid-point of these two numbers, which is 0.000152
  kg/hr  (= (0.000134 + 0.00017)/2) or 0.000334 Ibs/hr.

         Annual  at 10.000  pom.  The first step was to estimate the  leak frequency at 1,000 ppm.  In the previous step,
  we estimated the emission  factor at 1,000 ppm to be 0.000134  kg/hr.  Using the appropriate equation on page 5-19 of
  the 1993 Protocol document, we  can "back-calculate" the  equivalent leak frequency, which is calculated to be 0.213
  percent.  The leak frequency at 10,000 ppm will be less  than  0.213 percent.  Using this leak frequency in the
  appropriate equation on page 5-19 yields an emission factor of 0.000321 kg/hr.  We also know that the emission
  factor will be greater than that at 1,000 ppm, which was estimated to be 0.00015 kg/hr.  The emission factor for
  10,000 ppm is then bounded by these two emission factors, 0.000152 and 0.000321  kg/hr.  The emission factor for
  10,000 is then taken again as the mid-point between these two estimates (0.000236 kg/hr or 0.00052 Ibs/hr).

         Emission  Factors  for Quarterly  and  Monthly LDAR.   In  the absence of any information,  leak frequencies were
  assumed to decrease by 50  percent from annual to quarterly and 50 percent from quarterly to monthly.  The resulting
  leak frequencies were then used in the appropriate equations  on page 5-19 to estimate emission factors.

-------
FOOTNOTES  TO TABLE  1
(continued)

* Derivation of  emission factors based on  taking  known values (shown in  double-lined boxes  in the following tables),
  bounding unknown  values, and taking mid-points  as  estimates of  unknown emission factors.   The first table shows
  known and  estimated leak frequencies. The second  table shows the known and estimated emission factors.  These
  values were based upon the 1993 Protocol  document  data and equations.   See footnote d for a detailed discussion of
  the methodology used to estimate the unknown values.   The leak  frequency for annual at 1,000 ppm was based on the
  mid-point  of uncontrolled and quarterly  at 1,000 ppm leak frequencies.
                                     LIGHT LIQUID SERVICE VALVES LEAK FREQUENCIES
      LDAR PERIOD
                                  500
                LEAK DEFINITION (ppm)
                         1000
                                                                                                    Uncontrolled
         Annual
                         3.3
       Quarterly
        Monthly
      Uncontrolled
 2.42
 2.26
 0.896
 0.83
  8.5
  8.3
                                                                                                        A.34
                                LIGHT LIQUID SERVICE VALVES EMISSION FACTORS (Ibs/hr)
      LDAR PERIOD
                                  500
                LEAK DEFINITION (ppm)
                         1000
         Annual
                       0.00395
       Quarterly
        Monthly
      Uncontrolled
0.00257
0.00273
0.00099
0.00106
' Estimated by averaging the emission factors for annual  LDAR and monthly LDAR both with leak definition of 10,000
  ppm.

9 Derivation of emission factors based on taking known values (shown in double-lined boxes in the following tables),
  bounding unknown values, and taking mid-points as estimates of unknown emission factors.  The first table shows
  known and estimated leak frequencies.  The second table shows the known and estimated emission factors.  These
  values were based upon the 1993 Protocol document data  and equations.  See footnote d for a detailed discussion of
  the methodology used to estimate the unknown values.  The leak frequency for annual at 1,000 ppm was based on the
  mid-point of uncontrolled and quarterly at 1,000 ppm leak frequencies.
                                         GAS SERVICE VALVES  LEAK  FREQUENCIES
LDAR PERIOD

Annual
Quarterly
Monthly
HON
Uncontrolled
LEAK DEFINITION (ppm)
500



1000

3.095
1.13
1.00 |l
13.6 I 13.3
10000

2.33
0.79

Uncontrolled




7.48 || 	 7.48 	

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FOOTNOTES TO TABLE  1
(continued)
                                     GAS SERVICE VALVES EMISSION FACTORS (lbs/hr)
LDAR PERIOD

Annual
Quarterly
Monthly
HON
Uncontrolled
LEAK DEFINITION (ppm)
500

0.00323
0.00121
0.00099

1000

0.00345
0.001298


10000

0.00429
0.00165


Uncontrolled




II 0.0131 ||
h Derivation of emission factors based on taking known values (shown in double-lined boxes in the following tables),
  bounding unknown values, and taking mid-points as estimates of unknown emission factors.  The first table shows
  known and estimated leak frequencies.  The second table shows the known and estimated emission factors.  These
  values were based upon the 1993 Protocol document data and equations.  See footnote d for a detailed discussion of
  the methodology used to estimate the unknown values.  The leak frequency for annual at 1,000 ppm was based on the
  mid-point of uncontrolled and quarterly at 1,000 ppm leak frequencies.
                                      LIGHT LIQUID SERVICE PUMPS LEAK FREQUENCIES
                                 LIGHT LIQUID SERVICE PUMPS EMISSION FACTORS (lbs/hr)
LDAR PERIOD
Annual
Quarterly
Monthly
HON
Uncontrolled
LEAK DEFINITION (ppm)
500

0.0157
0.010


1000

0.0172
0.011
0.011

10000

0.024
0.0135

Uncontrolled




	 	 1
0.0438 |
  Based on emission reduction of 44 percent from uncontrolled level.  U.S. Environmental Protection Agency.  Fugitive
  Emission Sources of Organic Compounds -- Additional Information on Emissions, Emission Reductions, and Costs.  EPA
  450/3-82-010.  April 1982. (1982 AID document) p. 4-61.

  Based on 33 percent reduction, CTG.

  Total estimated emission reduction effectiveness of 49 percent.  Based on an estimated percent reduction of 44
  percent for a quarterly LDAR program with a leak definition of 10,000 ppm (see footnote d above) plus 5 percent
  based on increased effectiveness of decreasing the leak definition from 10,000 ppm to 1,000.

  Assumed to be 1 percent more effective than with leak definition of 1,000 ppm.

-------
FOOTNOTES TO TABLE  1
(continued)

*" Assumed 200 ppm leak definition had same emission factor as 500 ppm.

" 1993 Protocol  document, p. 2-21:

        1.90x10'* x (500)0'824 = 0.00318 kg per hour

                                 0.007 Ibs per hour

0 1993 Protocol  document, p. F-4.  The emission factor for pumps, light  liquid service also applies to agitators.

p Calculated using the following equation:

                                  (Uncontrolled Emission Rate - Emission Rate at IX)
                                              Uncontrolled Emission Rate

  Emission rates at 1X were calculated using the equations on p.  5-19 of the 1993 Protocol document.  For example, the
  average leak rate (kg/hr) for valves in gas service with a leak definition of 10,000 ppm can be calculated as
  follows:

                                    Average Leak Rate = (0.0781 x 0.01)  + 0.000131
                                                     = 0.000912 kg/hr
                                                     s 0.00201 Ibs/hr
q Assume maintain 1X leakers means an average of 0.5X leakers actually occur.   Used the leak rates for >10,000 and for
  <10,000  (see first table in footnote s) to estimate emission factors based  on percent leaking and not leaking.  For
  example.

        For PRVs:        kg/hr = (1.691 x 0.005) + (0.0447 x 0.995) »  0.05293
                         Ibs/hr = 0.05293 x 2.2 = 0.1164

' Assume maintain 0.5X leakers means an average of 0.25X leakers actually occur.  Used the leak rates for >10,000 and
  for <10,000  (see first table in footnote s) to estimate emission factors based on percent leaking and not leaking.
  For example.
        For valves  in gas service:
kg/hr = (0.0782 x 0.0025) + (0.000131 x 0.9975) = 0.000326
Ibs/hr = 0.000326 x 2.2 = 0.000718
* Calculation of Emission Factors for "No Evidence of Leaks" Program;  Leak Definition of 10,000 ppm.

                         CALCULATION  OF PERCENT OF  COMPONENTS WITH <10,000  PPM AND  >10,000  PPM
EQUIPMENT TYPE
Valves, gas service
Valves, light liquid
service
Valves, heavy liquid
service
Pump seals, light liquid
service
Pimp seals, heavy liquid
service
Pressure relief valves
Open ended lines
Compressor seals
Connectors
AVERAGE
EMISSION
FACTOR
(kg/hr)*
l_ 0.00597
0.00403
0.00023
0.0199
0.00862
0.104
0.0017
0.228
.0.00183
> 10,000 ppm
Emission Factor
(kg/hr)*
0.0782
0.0892
0.00023
0.243
0.216
1.691
0.01195
1.608
0.113
< 10,000 ppm
Emission Factor
( kg/hr}6
0.000131
0.000165
0.00023
0.00187
0.00210
0.0447
0.00150
0.0894
0.000081
PERCENT OF
COMPONENTS
>1 0,000 PPMe
7.48
4.341
NA
7.48
3.048
3.6
1.91
9.13
1.55
PERCENT OF
COMPONENTS
<1 0,000 PPMe
92.52
95.659
NA
92.52
96.952
96.4
98.09
90.87
98.45
NOTE:   Program assumed not  applicable to sampling connections.

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FOOTNOTES  TO TABLE 1
(concluded)

  Footnotes  to first table in footnote s:

        "  1993 Protocol document, p. 2-10.


        b  1993 Protocol document, p. 2-16.

        c  Calculated based on average emission factor and the > 10,000 and <10,000 ppm emission factors.   For
           example, solving for valves in gas service as follows:

                 0.00597 kg/hr - 0.0782  (X)  + 0.000131  
                          1.00 * X * T

                 where:   X =  percent of components with  >10,000 ppn

                         Y » percent of components with <10,000 ppm
                   CALCULATION OF NO EVIDENCE OF LEAKS (10,000 PPM  LEAK DEFINITION)  EMISSION  FACTORS
EQUIPMENT TYPE
Valves, gas service
Valves, light liquid service
Valves, heavy liquid service
Pumps, light liquid service
Pumps, heavy liquid service
Pressure relief valves
Open-ended lines
Compressor seals
Connectors
EMISSION
FACTOR (kg/hr)
at 10,000 ppm*
0.005806
0.0098823
0.00023b
0.03756
0.03756
0.03756
0.0015°
0.03756
0.01058
PERCENT
<10,000
PPM
92.52
95.659
NA
92.52
96.952
96.4
98.09
90.87
98.45
PROGRAM EMISSION FACTOR
kg/hr
0.000555
.000587
0.00023
0.004539
0.00318
0.0444
0.00147
0.0845
0.000244
Ibs/hr
0.00122
0.00129
0.000506
0.00999
0.007
0.0977
0.00324
0.186
0.00054
        *  Calculated using correlation equations found on page 2-21 of the 1993 Protocol document.


        b  Based on average emission factor for source.


        c  Assumed same as <10,000 ppm emission factor.

        Sample calculation:

        Valves, gas service:   0.000555 kg/hr  =  (0.005806  x 0.0748) + (0.000131 x 0.9252)

1 Assuned to be midway in effectiveness between "uncontrolled" and "maintain less than 2X leakers (10,000 ppm)."

" Based on 90 percent control  efficiency.  1993 Protocol document, p.5-2.  Actual efficiency of a closed-vent system
  depends on percentage of vapors collected and efficiency of control device to which the vapors are routed.

v Control efficiency of closed-vent system installed on a pressure relief device may be lower than other closed-vent
  systems, because they must be designed to handle both potentially large and small volumes of vapor.  1993 Protocol
  document, p. 5-2.

* Based on 100 percent control efficiency.  1993 Protocol document, P. 5-2.

-------
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-------
                    TABLES

SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
      AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
ABS - Batch Emulsion

ABS - Batch
Suspension

ABS - Continuous -
Mass

ABS Continuous -
Emulsion

ABS - Latex
FACILITY
Monsanto, Addyston
GE, Washington
Dow, Midland
Monsanto, Muscatine

Monsanto, Addyston
Monsanto, Muscatine

Monsanto, Addyston
Dow, Midland
Dow, Torrance
Dow, Allyn's Point
Dow, Hanging Rock

GE, Washington
GE, Ottawa

BF Goodrich, Akron
PERCENT
REDUCTION
91.2
84.1
82.0
79.5

96.1
78.0

90.3
82.7
71.9
38.9
28.1

84.1
43.9

32.7
MACT FLOORS
EXISTING
FACILITIES
84.2

87.1

62,4

64.0

32.7
NEW
FACILITIES
91.2

96.1

90.3

84.1

32.7
                       14

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                              TABLES


     SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
             AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
PS Continuous
FACILITY
Dow, Joilet
BASF, Holyoke
Monsanto, Addyston
Huntsman,
Chesapeake
Novacor, Indian
Orchard
Dow, Torrance
Novacor, Decatur
Huntsman, Belpre
Dow, Riverside
BASF, Santa Ana
Dow, Midland
BASF, Joilet
Dow, Allyn's Point
GE, Selkirk
American Polymers
Fina Oil, Carville
Dow, Hanging Rock
Amoco, Joilet
Huntsman, Peru
Chevron, Marietta
Kama, Hazelton
PERCENT
REDUCTION
85.8
81.9
80.8
79.6
78.6
76.9
75.9
72.5
70.8
70.7
59.5
51.5
47.4
46.8
33.0
25.7
23.9
22.1
0
0
*
MACT FLOORS
EXISTING
FACILITIES
81.3
















NEW
FACILITIES
85.8
Insufficient information to estimate emissions and emission reductions.
                                 15

-------
                              TABLES

      SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
              AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
EPS

Batch
FACILITY
Huntsman, Rome
Scott, Saginaw (1)
Scott, Forth Worth
BASF, South
Brunswick
Arco, Monaca
Huntsman, Peru
Arco, Painesville

Huntsman,
Chesapeake
American
Polystyrene, Torrance
American Polymers,
Oxford
ARCO, Monaca
Scott, Saginaw (1)
Scott, Saginaw (2)
Dan, Leola
Amoco, Willow
Springs
Dan, Ownesboro (1)
Rohm and Haas,
Phila.
Dart, Owensboro (2)
Huntsman, Peru
PERCENT
REDUCTION
75.4
33.0
33.0
28.4
32.4*
0
0

78.5
69.9
33.8
32.4
30.7
30.7
29.7
26.5
0
0
0
0
MACT FLOORS
EXISTING
FACILITIES
40.4



49.0






NEW
FACILITIES
75.4

78.5
*  Estimate based on equipment counts for entire facility, see PS-batch estimate.
                                  16

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                    TABLES

SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
      AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
MBS

Nitrite

SAN - Batch

SAN - Continuous

MABS

ASA/AMSAN
FACILITY
Elf Atochem
Kaneka
Rohm and Haas

BP Chemicals

Monsanto, Addyston
Monsanto, Muscatine

Monsanto, Addyston
Dow, Midland
GE, Bay St. Louis

GE, Washington

GE, Selkirk
PERCENT
REDUCTION
i
94.0
84.7
4.7

74.5

88.9
76.3

88.6
77.0
67.8

84.1

0
MACT FLOORS
EXISTING
FACILITIES
61.1

74.5

82.6

77.8

84.1

0
NEW
FACILITIES
94.0

74.5

88.9

88.6

84.1

0
                       17

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                    TABLES

SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
      AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
PET - DMT/BATCH

PET - DMT/CONT.
FACILITY
Hoechst-Celanese (HC),
Spartanburg
BASF, Lowland, TN
Tennessee Eastman
(TE), Kingsport, TN
HC, Shelby, NC
3M, Decatur, AL (1)
3M, Decatur, AL (2)
3M, Greenville, SC
ICI, Fayetteville, NC
ICI, Hopewell, VA
Eastman Kodak,
Rochester, NY

HC, Spartanburg, SC
DuPont, Copper River,
SC
DuPont, Circleville, OH
DuPont, Florence, SC
DuPont, Kinston, NC
DuPont, Old Hickory,
TN
DuPont, Brevard, NC
DuPont, Cape Fear, NC
Carolina Eastman (CE),
Columbia, SC
TE, Kingsport, TN
PERCENT
REDUCTION
0
0
0
0
0
0
0
0
0
0

0
0
0
0
0
0
0
0
0
0
MACT FLOORS
EXISTING
FACILITIES
0

0
NEW
FACILITIES
0

0
                       18

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                    TABLES


SUMMARY OF ESTIMATED PERCENT EMISSION REDUCTIONS
      AND MACT FLOORS FOR EQUIPMENT LEAKS
SOURCE
CATEGORY/
SUBCATEGORY
PET - TPA/CONT.

PET - TPA/Batch
FACILITY
Carolina Eastman,
Columbia, SC (Plant 3)
Carolina Eastman,
Columbia, SC (Plant 2)
Hoechst-Celanese,
Salisbury, NC
Hoechst-Celanese,
Spartanburg
DuPont, Copper River,
SC
DuPont, Kinston, NC
DuPont, Cape Fear,
NC
Wellman, Palmetto, SC
YKK, Macon, GA
Tennessee Eastman,
Kingsport, TN
Hoechst-Celanese,
Greer, SC
Allied-Signal,
Moncure, NC
Shell, Pt. Pleasant, WV
'
Shell, Pt. Pleasant, WV
PERCENT
REDUCTION
28.1
28.1
3.2
, °
0
0
0
0
0
0
0
0
0

0
MACT FLOORS
EXISTING
FACILITIES
11.9









0
NEW
FACILITIES
28.1

0
                       19

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Attachment 7
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             Component-specific summary of baseline equipment leak
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                                           Environmental Consulting and Research
MEMORANDUM

Date:     May 10, 1995

Subject:  Subcategorization for the  Elastomer Production Industry
          (Polymers and Resins I)

To:       Leslie Evans, ESD/OCG

From:     Charlotte ClarK- and Phil NorwoodJ EC/R

     This memorandum serves to discuss  categorization and
subcategorization of sources within  the Polymers and Resins I
emissions source grouping.  These sources  produce elastomers, or
synthetic rubbers, that are primarily used in the tire and
automotive products industries.

INTRODUCTION

     The Clean Air Act as amended in 1990  (1990 Amendments)
required the U.S. Environmental Protection Agency (EPA)  to
publish a list of and establish standards  for all major and
certain area source categories and subcategories of sources
emitting any of 189 hazardous, air pollutants (HAP).  Designation
of categories or subcategories is critical to a regulatory
effort, because the Maximum Achievable  Control Technology  (MACT)
standard is set based on a measure of central tendency (such as
average) of emissions achieved by all members of the best
performing 12 percent of the existing sources in the category or
subcategory.

Definition of Category and Subcategory

     The terms category and subcategory are not defined in
Section 112.  However, the preamble  to  the Initial Source
Category List defines a "category" of sources as "...a group of
sources having some common features  suggesting that they should
be regulated in the same way and on  the same schedule."*
Because no statutory definition of category or subcategory
existed, and in response to comments provided on the draft source
category list, the EPA elected in the source category list
Federal Register notice to use the term "category" to designate
all of the groupings of sources that emit  HAP on the list.^  The
EPA made clear that this decision did not  affect the authority of
the Agency to further disaggregate source  categories into
subcategories when establishing standards  at a later date.  Such
subcategories would .be developed.in  order  to accurately reflect
differences in air emission characteristics within a source
category. .          .
                        3721-D University Drive • Durham, North Carolina 27707
                          Telephone: (919) 493-6099 . Fax: (919) 493-6393

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     For the purpose of this memorandum,  the term source category
will be generally used to describe groups actually consisting of
original source categories (as included in the EPA's original
list).   The term subcategory will be used to reflect further
divisions of listed source categories or the re-combination of
source and subcategories.

Elastomer Categories

     The Initial Source Category List contained 39 production
categories for polymers and resins.3  For regulatory development
purposes, the EPA developed 4 groups of Polymer and Resin
production processes, which have been given the names Polymers
and Resins I-IV.  Each grouping of polymer and resin products has
similar production processes, product end use, air pollution
emission characteristics, control device applicability and costs,
and regulatory schedule requirements.  Nine polymer and resin
products that are considered "elastomers," or synthetic rubbers
and that have similar production, air pollution emission, and
market share characteristics were grouped together in the
Polymers and Resins I Group.  For the purpose of this regulatory
effort, these nine source categories are collectively referred to
either as Group I Polymers and Resins or as the elastomer source
categories.  Because these nine production categories have
significant similarities, they are being considered together for
regulation in the development of single National Emission
Standards for Hazardous Air Pollutants (NESHAP) for Elastomer and
Synthetic Rubber Production.

          EPA's draft schedule published September 24, 1992  (57
FR 44147) slated the above categories of elastomers for NESHAP
promulgation by November 15, 1994.  Due to the similarities
between the elastomer products and processes, and the fact that
all nine shared the same regulatory schedule, the EPA studied
these nine source categories together in the Polymers and
Resins I project.  The EPA plans to propose the Polymers and
Resins I standard in May 1995, and promulgation is scheduled for
May 1995.  Promulgation by this date will avoid the "hammer"
provisions of section 112(j) of the amended Clean Air Act.

     The nine source categories for the production of elastomers
are listed below:
               Butyl Rubber Production;
               Epichlorohydrin Elastomers Production;
               Ethylene-propylene Elastomers Production;
               Hypalon™ Production;
               Neoprene Production;
               Nitrile Butadiene Rubber Production;
               Polybutadiene Rubber Production;
               Polysulfide Rubber Production; and
               Styrene-Butadiene Rubber and Latex Production.

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SOURCE CATEGORIES

     For six of the source categories listed, subcategorization
was not necessary.  The following paragraphs describe each of
these source categories.  Figure 1 provides a schematic diagram
of all source categories and subcategories of elastomers
production.

Epichlorohydrin Rubber

     Only one facility was identified that manufactures
epichlorohydrin rubber.  Therefore, no variation is believed to
exist in production process or in HAP emitted, and no
subcategorization was warranted for the epichlorohydrin rubber
source category.

Ethylene-Propylene Rubber

     The ethylene-propylene rubber (EPR) source category was not
divided into subcategories.  Four facilities were identified that
manufacture EPR by the solution process, and one facility was
identified that manufactures EPR by the suspension process.
These plants manufacture several related EPR products — one a
co-polymer product that cannot be vulcanized, and one a
terpolymer product that can be vulcanized.  Although some
variation exists in production process between these facilities,
the variations were not sufficient to result in differences in
the level of the standard.  Therefore, subcategorization of this
source category was not warranted.

Hypalon™ Rubber

     Only one facility was identified that manufactures Hypalon™
rubber.  Therefore, no variation is believed to exist in
production process or in HAP emitted, and no subcategorization
was warranted for the Hypalon™ source category.

Neoprene Rubber and Latex

     Three facilities were identified that manufacture neoprene
rubber and latex.  All use similar production processes that have
similar HAP air emission characteristics.  Therefore, for the
purposes of this regulatory effort, one source category was
appropriate.

Polybutadiene Rubber

     Five facilities were identified that produce polybutadiene
rubber; all use a solution process.  Although polybutadiene
rubber can be made using the emulsion process, no active
facilities were identified that use this process.  All five
active facilities use similar production processes that have
similar HAP emission characteristics.  Therefore, for the
purposes of this regulatory effort, one subcategory was
appropriate.

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     Note that, because of significant similarities between
production of polybutadiene rubber and styrene-butadiene rubber
by solution, these two products were combined into one
subcategory (see styrene-butadiene rubber discussion below).

Polysulfide Rubber

     Only one facility was identified that manufactures
polysulfide rubber.  Therefore, no variation exists in process or
HAP emitted, and no subcategorization was warranted for the
polysulfide rubber source category.

SUBCATEGORIZATION

     Within three of the nine elastomer production source
categories, although product end use and production process are
similar, significant variations do exist in manufacturing process
and air pollution emissions.  Therefore, the EPA has further
divided these three categories — butyl rubber, nitrile-butadiene
rubber, and styrene-butadiene rubber — into subcategories for
the purposes of regulation in the NESHAP.  Another category,
polybutadiene rubber, was combined with one of the new
subcategories due to similarities in process and emissions.  The
following sections of this memorandum describe the technical
basis for each subcategorization decision.

Butyl Rubber

     The butyl rubber source category was divided into
subcategories for production of butyl rubber and production of
halobutyl rubber.  One facility was identified that actively
produces butyl rubber, and one facility was identified that
actively produces halobutyl rubber.  Butyl rubber is typically
made by a precipitation (slurry) polymerization process in which
isobutylene and isoprene are copolymerized in methyl chloride
solvent.  Halobutyl rubber, or halogenated butyl rubber, is
produced by dissolving butyl rubber in hydrocarbon solvent
(typically hexane) and contacting the solution with gaseous or
liquid elemental halogens such as chlorine or bromine.

     Halobutyl rubber was made a separate subcategory from butyl
rubber because of variations in both production process and HAP
emitted.  The production process varies in that halobutyl rubber
is formed by using butyl rubber as the raw material and
performing two additional steps — solvent replacement and
halogenation.  The HAP emitted varies, because hexane, a listed
HAP, is the typical hydrocarbon solvent used to make halobutyl
rubber in the solvent replacement process.  Hexane is not used,
or emitted from the production of non-halogenated butyl rubber.
Further, halobutyl rubber has different end uses than butyl
rubber, because it resists aging to a higher degree than
nonhalogenated rubber, and therefore, is more compatible with
other types of rubber.4

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Nitrile-Butadiene Rubber and Latex

     The nitrile-butadiene subcategory was divided into
subcategories for production of rubber and production of latex.
Manufacture of nitrile butadiene rubber (NBR)  was identified at
four domestic facilities, and manufacture of nitrile butadiene
latex (NBL) was identified at 3 domestic facilities (none of
which also manufacture NBR).  In both the rubber and latex
emulsion processes, butadiene and acrylonitrile monomers are
combined in a reactor with a soap solution and additives.  The
unreacted butadiene and acrylonitrile are then removed.  For
nitrile butadiene rubber, the polymer is coagulated and dried; in
the case of nitrile-butadiene latex, the polymer is not
coagulated or dried, but rather is blended with other specialty
ingredients.  The coagulation and drying production steps cause
HAP emissions, and therefore, will be defined and regulated as
back-end operations under this NESHAP.  Latex production does not
contain these production steps, and is not believed to produce
significant HAP after the steam stripping operations.  Therefore,
NBR and NBL were differentiated into separate subcategories for
the purposes of this NESHAP.

Styrene-Butadiene Rubber

     The styrene-butadiene rubber source category was divided
into subcategories for production of rubber by solution,
production of rubber by emulsion, and production of latex.

     Four facilities were identified that produce styrene-
butadiene rubber (SBR) by solution.  All of these facilities also
produce polybutadiene rubber by solution.  Production of SBR by
solution uses the same equipment as production of polybutadiene
rubber by solution, and the processes are identical, except that
styrene is also added to the polymerization operation.  For that
reason, one combined subcategory was created for production of
both SBR and polybutadiene rubbers by solution.  This process is
subcategorized from the emulsion process, because of the use of
HAP solvents  (not used in the emulsion process).

     Four facilities were identified that produce SBR by
emulsion, and 15 facilities were identified that produce styrene-
butadiene latex (SBL) by emulsion.  In both the rubber and latex
emulsion production processes, butadiene and styrene monomers are
combined in a reactor with a soap solution and additives.  The
unreacted butadiene and styrene are then removed.  For SBR, the
polymer is coagulated and dried; in the case of SBL, the polymer
is not coagulated or dried, but rather is blended with other
specialty ingredients.  The coagulation and drying production
steps cause HAP emissions, and therefore, will be defined and
regulated as back-end operations under this NESHAP.  Latex
production does not contain these production steps, and is not
believed to produce significant HAP after the steam stripping
operations.  Therefore, SBR and SBL by emulsion were
differentiated into separate subcategories for the purposes of
this NESHAP.

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REFERENCES

1.   U.S. Environmental Protection Agency.  Initial List of
     Categories of Sources Under Section 112(c)(l) of the Clean
     Air Act Amendments of 1990: Notice.  Federal Register.
     July 16, 1992. 57 FR 31578.
2.   Reference 1, p. 31579.
3.   Reference 1, p. 31592.
4.   Austin, G.T.  Shreve's Chemical Process Industries.  Fifth
     Edition.  New York, McGraw-Hill Book Company.  1984.  p.
     704.

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   MEMORANDUM

   Date:     May 10, 1995

   Subject:  MACT Floors and Regulatory Alternatives for the
             Elastomer Production  Industry  (Polymers and Resins I)
E /R Incorporated.
Environmental Consulting and Research
   From:     Phil Norwood, EC/]

   To:       .Leslie Evans, EPA/OAQPS/ESD/OCG

        This memorandum presents the  approach used to develop
   maximum achievable control  technology  (MACT)  floors and
   regulatory alternatives for the  Polymers and  Resins I project.
   This memorandum is organized in  three  sections.   First, a brief
   background of the project .and the  regulatory  process is provided.
   Second, a discussion is provided of  considerations taken in
   determining MACT floors.  Third, procedures used to determine
   MACT floors are described,  followed  by a subcategory-specific
   presentation of the results of the analysis.   The final section
   is a discussion of the development of  regulatory alternatives
   more stringent than the MACT floors.

   BACKGROUND

   Source Categories and Subcategorization

        Title III of the amended Clean  Air Act requires the
   Environmental Protection Agency  (EPA)  to develop air emission
   standards, for all major sources  emitting any  of the 189 hazardous
   air pollutants (HAP's) identified  in Section  112(b) of the Act:
   On July 16, 1992 (57 FR 31676),  the  EPA published the initial
   list of categories for which standards are expected to be
   developed.  This list included nine  source categories of
   "elastomers."  These source categories are as follows.

             Butyl .rubber
             Epichlorohydrin elastomers
             Ethylene propylene rubber
             Hypalon™
             Neoprene
             Nitrile butadiene rubber
             Polybutadiene rubber
             Polysulfide rubber
             Styrene-butadiene rubber

        EPA's draft schedule published  September 24, 1992 (57 FR
   44147) slated the above categories of  elastomers for NESHAP
   promulgation by November 15, 1994.  Due to the similarities
   between the elastomer products and processes, and the fact that
   all nine  shared the same regulatory  schedule, the EPA studied
   these .nine source categories together  in the  Polymers and
                   3721-D University Drive • Durham, North Carolina. 27707
                     Telephone: (919) 493-6099 . Fax: (919) 493-6393

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Resins I project.  The EPA plans to propose the Polymers and
Resins I standard in May 1995, and promulgation is scheduled for
May 199.6.  Promulgation by this date will avoid the "hammer"
provisions of section 112(j)  of the amended Clean Air Act.

     Based on differences in processes, HAP emissions, and
emission control techniques,  the EPA developed the
subcategorization plan shown in Figure 1.  The rationale for
subcategorization is addressed in a separate memorandum.1  For
the purpose of this memorandum, the term "subcategory" will be
generally used to describe each of these elastomer processes,
although some of these process types actually consist of source
categories (as included in the EPA's original list),
subcategories of source categories, or the re-combination of
subcategories.  The final 12 subcategories include:

          Butyl rubber (BR)
          Epichlorohydrin elastomers (EPI)
          Ethylene propylene rubber (EPDM)
          Halobutyl rubber (HBR)
          Hypalon™ (HYP)
          Neoprene (NEO)
          Nitrile butadiene latex  (NBL)
          Nitrile butadiene rubber (NBR)
          Polybutadiene and styrene-butadiene rubber by solution
          (PBR/SBR-S)
          Polysulfide rubber  (PSR)
          Styrene-butadiene latex  (SBL)
          Styrene-butadiene rubber by emulsion (SBR-E)

The approach discussed below for developing the MACT floors and
first regulatory alternatives was applied separately to each of
these subcategories.

Clean Air Act Requirements

     The amended Clean Air Act contains requirements for the
development of regulatory alternatives for sources of HAP
emissions.  Section 112(d) requires emission standards for HAP's
to reflect the maximum degree of reduction in emissions of HAP's
that is achievable "...taking into consideration the cost of
achieving such emission reduction, and any non-air quality health
and environmental' impacts and energy requirements..."  This
control level is referred to as MACT.

     The Clean Air Act also provides guidance on determining the
MACT "floor," which is the least stringent level allowed for MACT
standards.  For new sources, emission standards "shall not be
less stringent than the emission control that is achieved in
practice by the best controlled similar source."  For existing
sources, the emissions standards must be at least as stringent as
either "the average emission  limitation achieved by the best
performing 12 percent of the existing sources" or "the average

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emission limitation achieved by the best performing 5 sources"
for categories or subcategories with less than 30 sources.

     Two interpretations have been evaluated by the EPA for
representing the MACT floor for existing sources.  One
interpretation is that the MACT floor is represented by emissions
level achieved by all members of the best performing 12 percent.
The second interpretation is that the MACT floor is represented
by the "average" of the best performing sources, where the
average is based on a measure of central tendency, such as the
arithmetic mean, median, or mode.  In a June 6, 1994 Federal
Register notice, the EPA presented its interpretation of the
statutory language concerning the MACT floor for existing
sources.  This interpretation is that the "average" is more
appropriate, given the statutory language.  The determination of
MACT floors for the Polymers and Resins I subcategories was
consistent with this interpretation.

     While the MACT floor represents the least stringent level of
control for a standard, the EPA can consider regulatory
alternatives more stringent than the floor.  The Clean Air Act
specifies that the EPA consider cost, non-air quality health and
environmental impacts, and energy requirements in the evaluation
of regulatory alternatives more stringent than the MACT floor.

CONSIDERATIONS IN DETERMINING MACT FLOORS

     Several fundamental decisions must be made before the MACT
floor can be determined for individual subcategories.  These
decisions are discussed below.

Best Performing Facilities

     One of the most basic decisions to be made is the
determination of the "best performing" facilities.  All of the
subcategories in this project have less than 30 sources, meaning
that the MACT floor must be based on the best performing 5
sources.  Only one subcategory, SBL, contains more than 5
sources.  Therefore, for all subcategories except SBL, the MACT
floor is based on the "average emission limitation" of all
sources in the subcategory.  The determination of the best
performing 5 SBL sources is discussed in the SBL section.
                 »

Grouping of Emission Sources

     Two approaches were considered in the analysis to describe
MACT floors.  One approach is to cluster all sources of emissions
at an affected source together.  The EPA considered basing the
MACT floors on emission factors  (weight of HAP emitted per weight
of product), including all emission source types at each of the
sources in the subcategory.  A standard founded on this approach
would allow the owner or operator to control selected emission
points, as long as the facility-wide HAP emission factor was

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below the level specified in the standard.  This approach was
abandoned for several reasons, including confidentiality
concerns, the reliance on inconsistent data to determine the
floors, and the problems associated with the development of
standard methodologies to verify emissions that are applicable
for all sources in the subcategory.

     A second approach is an analysis where emission sources are
considered by emission source type.  This type of "plank"
analysis was used for this project.  For this project, emission
points at elastomer facilities were assigned to one of five
emission source types: storage vessels, "front-end" process
vents, "back-end" process vents, wastewater streams, and
equipment leaks.  The process "front-end" includes
prepolymerization, reaction, stripping, and material recovery
operations, while the "back-end" includes all operations after
stripping (predominately drying and finishing).

     Additional grouping decisions may be made in the
determination of MACT floors within each'emission source type.
Consideration can be given to the following: equipment type,
equipment size, equipment contents, stream characteristics, and
other elements that can affect the emission potential of an
emission point or the ability to reduce emissions from the point.

     For instance, the floor for storage vessels could be
determined without regard to size or contents, or storage vessels
of similar size containing the same material  (i.e., all styrene
vessels 10,000 gallons or less) could be analyzed together.
Similarly, the average emission limitation could be determined
for all process vents, or process vents could be separated into
types according to the origin of the vent stream (reactor vent,
stripper vent, etc.)  Process vent types could also be based on
generic parameters such as HAP content, flow rate, etc.

Format of the Average Emission Limitation

     As discussed above, MACT floors for subcategories in this
project were identified using the "average" interpretation.  The
MACT floor levels were established by determining some measure of
central tendency of the emission control for each emission source
type in each subcategory.  The average emission limitation could
be expressed in several different formats, such as an emission
factor, a percent reduction, a work practice standard, a specific
type of equipment, or a variety of other options.  The
environmental and cost impacts could change depending on the
choice of the MACT floor format.

Use of EON in Floor Determinations

     As described above, many complexities exist in the
determination of MACT floors.  Although, the EPA considered
direct approaches to determine the MACT floors, problems arose in

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each approach.  Most of these problems were a result of the fact
that, while facilities in a subcategory produce the same product,
specifics of the process (and associated emission points) varied
considerably.  Thus, comparison of control techniques was
inappropriate, when the origin and characteristics of streams of
the same emission source type were so different.

     The EPA studied methods to simplify the MACT floor analysis,
and decided to use the Hazardous Organic NESHAP, or HON  (40 CFR
63 subparts F, G, and H),  in the MACT floor analysis.  The
rationale for this conclusion is provided in this section.

     First, many similarities exist in the equipment, emissions,
and control techniques between the elastomer industry and the
synthetic organic chemical manufacturing industry (SOCMI)
regulated by the HON.  The HAP monomers and solvents used in the
elastomer industry are all SOCMI chemicals, and some elastomer
processes are co-located with SOCMI processes.

     The HON contains emission limitations for five emission
source types: process vents, storage vessels, transfer
operations, wastewater, and equipment leaks.  These source types
closely resemble those of Polymers and Resins I.  For each
emission source type, applicability is based on "generic"
characteristics of an emission point such as HAP emissions, HAP
concentration, flow rate,  size of the equipment, etc.  These
characteristics are also common to Polymers and Resins I
emissions source types.

     Another practical reason for using the HON requirements is
that the HON provides "ready-made" alternatives.  The HON takes
into account equipment type, equipment size, equipment contents,
stream characteristics, and other important aspects of the floor
determination discussed above.

     Due to the similarities between the SOCMI and elastomer
industries, and other reasons discussed above, the EPA concluded
that the HON requirements for storage vessels, process vents,
wastewater, and equipment leaks are appropriate to use to
determine the MACT floor for the elastomer industry.  The
determination of the MACT floor using the HON is described in the
procedures section of this memorandum.

Other Emission Source Types

     The HON requirements noted above apply to three of  the five
elastomer emission source types and part of a fourth: storage
vessels, wastewater, and equipment leaks, as well as front-end
process vents from continuous processes.  However, the HON
process vent provisions exempt vents from batch processes, and
some of the front-end operations in the elastomer industry are
operated in a batch mode.   In addition, the process back-end
operations in the elastomer industry are unlike any operations  in

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the HON.   Therefore, different approaches were needed to
determined the floors for these two emission source types.

Use of the Batch processes ACT for batch front-end process vents

     The EPA also would have preferred a direct approach for
determining MACT floors for batch front-end process vents.
However,  the variability in processes, the fact that vents were
seldom identified as batch vents, and the fact that many batch
vents were combined with continuous vents, made any direct
approach infeasible.  Therefore, the EPA also looked for an
approach that was feasible to implement.

     In 1993, the EPA published the guidance document, "Control
of Volatile Organic Compound Emissions From Batch Processes"
(EPA-453/R-93-017).  This alternative control technique (ACT)
document provides guidance to State and local air pollution
regulatory agencies on the development of regulations for air
emissions from batch processes.

     The guidance in the document is intended to apply to all
batch operations.  While the polymer and resin process described
in the document  (epichlorohydrin-based non-nylon polyamide) was
not an elastomer process, the equipment, emission sources and
control technologies for the industry studied are similar to
those in the elastomer industry.

     A great deal of the analysis in the ACT was dedicated to the
generation of process vent applicability criteria for three
levels of control: 90, 95, and 98 percent control.  As with the
HON, the applicability criteria are based on general vent stream
characteristics, and not on process-specific parameters.  These
characteristics include the volatility of the organic material in
the vent stream, the annual emissions, and the average flow rate
of the stream.

     Due to the similarities between the processes studied in the
ACT, and the general nature of the applicability criteria, the
EPA concluded that these criteria were appropriate to use in
defining the MACT floor for front-end process vents from batch
processes in the elastomer industry.  The determination of the
MACT floor using the Batch ACT is also described in the
procedures section of this memorandum.

Back-end process vents

     Many of the elastomer subcategories produce dry elastomer
products.  As described in detail in the industry description
memorandum, the processes to "finish" the crumb rubber include
many unit operations that do not have process vents comparable to
SOCMI process vents.  The emissions from many of the back-end
operations are not completely captured and vented to traditional
vent stacks.  Finishing operations are often located in large

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warehouse-type buildings, and process fugitive emissions are
removed from the work space through roof fans and other general
building ventilation.  In addition, the vents from the largest
emission source, crumb dryers, typically have large flow rates
and low HAP concentrations due to the high air flow necessary to
properly dry the polymer.  HON process vent control methods are
not conducive to or cost-effective for these dryer vents.
Therefore, for the process back-end, the MACT floors were
determined on a subcategory-specific basis, as described in the
procedures section of this memorandum.

PROCEDURES USED TO DETERMINE MACT FLOORS

     Two basic procedures were used to determine the MACT floors
for the Polymers and Resins I subcategories.  The first, the HON-
based approach, compared existing levels of control with the
level of control that would be required at elastomer facilities
if the HON requirements were applied.  This approach was used for
storage vessels, wastewater, and equipment leaks.  For front-end
process vents, the same approach was used, except that the 90
percent control level from the Batch ACT was used for batch
processes, and the HON process vent provisions were used for
continuous processes.  The 90 percent Batch ACT control level was
selected, because the estimated cost-effectiveness for this level
was comparable to the cost-effective of the HON continuous vent
provisions (approximately $3,000 per Megagram).   A second
approach was used to assess the average emission limitation for
back-end process emissions, and was based on emission reduction
techniques used for each specific subcategory.  Both of these
approaches are discussed in more detail below.

HON-Based Approach - Existing Sources

     The concept of this approach is to determine how controls at
elastomer facilities compare to the level of control that would
be required by the HON (and by the Batch ACT).  This type of
analysis does not define specific floors in terms of numeric
values.  Rather, the conclusion of each floor analysis using this
HON-based approach is whether the MACT floor is less stringent
than, more stringent than, or equal to, the HON-level of control.
This section describes the general HON-based approach used for
all emission source types  (i.e., storage vessels, front-end
process vents, wastewater streams, equipment leaks), followed by
specifics of the individual emission source types.

General approach

     For each facility in each subcategory, the existing controls
were identified for each emission point.  The existing level of
control was then compared to the level of control that would be
required by the HON/Batch ACT, and the emission point was noted
as being controlled at a level less stringent than the HON/Batch
ACT requirements (less than HON), a level equivalent to the

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     After each emission point at each facility was
characterized, all emission points of a given emission source
type were grouped together and a facility-wide determination was
made for each emission source type.  For instance, if an emission
point was controlled at a level less stringent than the HON, and
no other emission point of the same type was controlled at a
level more stringent than the HON, the facility was classified as
"less than HON" for that emission source type.  If all controls
at the facility were equivalent to the HON levels, the facility
was classified as "equal to HON."  If one or more points was
controlled at a level more stringent than the HON, and no point
of the same type was controlled at a level less stringent than
the HON, the facility was classified as "greater than HON."

     A clarification is necessary related to uncontrolled
emission points.  If an emission point was uncontrolled, and the
HON/Batch ACT would not require control for that point, the level
of control is equivalent to the HON/Batch ACT level of control.
Therefore, the floor for a subcategory could be the HON/Batch
ACT, when in fact all emission points of that particular emission
source type were uncontrolled.

     If a facility reported different levels of control (in
comparison to the HON) within one emission source type, an
additional analysis was necessary to classify the facility.  In
these situations, the. existing emission level was compared to the
emission level that would be required if HON controls were
applied.  If the existing emissions were less than the HON-level
emissions, the facility was classified "greater than HON," but if
the HON-level emissions were lower, the facility was classified
"less than HON."

     The floor for each emission source type was then defined for
each subcategory as less than, equal to, or greater than,  the HON
level of control.  This determination was based on the majority
of individual facility classifications for the subcategory.

Storage vessels

     The applicability of the existing HON storage tank
provisions is based on tank size and vapor pressure of the total
organic HAP in the storage tank.  Vessels meeting the
capacity/vapor pressure criteria must be controlled using one of
three control techniques: (1) an internal floating roof, (2) an
external floating roof, or (3) a closed vent system to a control
device  (95 percent emission reduction).  If the maximum true
organic HAP vapor pressure of the vessel contents is high enough,
the control option is limited to a closed vent system vented to a
control device.  Pressure tanks (greater than 23 psi) are exempt
from the HON requirements.

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     In order to evaluate the applicability of the HON provisions
to elastomer storage vessels, the maximum true vapor pressures of
monomers,  solvents, and additives used at elastomer facilities
were estimated, and the level of control that would be required
determined.

     For each facility in each subcategory, the existing storage
vessel controls were noted and summarized by individual HAP.  The
existing level of control was then compared to the HON-level of
control for each vessel, and the MACT floors were determined as
discussed above in the general HON-approach section.  Table 1
shows the level of control that would be required by the HON for
HAP's used in the elastomer industry.

Front-end process vents

     The HON process vent provisions apply to continuous process
vents emitting streams containing more than 0.005 weight-percent
HAP.  Control  (98 percent) is required for each process vent with
a flow rate greater than or equal to 0.005 standard cubic meters
per minute,  an organic HAP concentration greater than or equal to
50 ppmv, and a total resource effectiveness (TRE) index value
less than or equal to 1.

     The Batch ACT process vent provisions apply to volatile
organic compound (VOC) emissions from batch process vents.  In
this analysis, only the organic HAP emissions were considered.
The first level of applicability in the Batch ACT is based on
annual emissions.  If annual HAP emissions, calculated before a
control or recovery device, are less than specified levels,
control is not required.  For the 90 percent control level, these
"cutoff" levels are between 7,300 and 11,800 kilograms per year,
depending on the volatility of HAP's emitted.  If annual
emissions were greater than the cutoff level, emissions were
input into an equation from the ACT to determine a cutoff flow
rate.  If the actual flow rate of the batch vent stream is less
than the cutoff flow rate, 90 percent control is required.

     EC/R applied the HON or Batch ACT criteria to each process
vent for which the necessary vent stream parameters were
provided.   In some instances, EC/R was able to estimate the
necessary parameters.  In situations where a continuous vent
stream was controlled using a thermal oxidizer or flare, EC/R
applied the HON criteria to the stream prior to the control
device, to assess whether the stream would have required control
based on the HON criteria.  Similarly, in situations where a
batch vent stream was controlled using a control or recovery
device, the Batch ACT criteria were applied prior to the device.
The existing level of control was then compared to the level of
control that would be required by the HON or Batch ACT.

     Information was seldom provided that identified whether the
vent was continuous or batch.  The HON criteria were applied to

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TABLE 1.  EON STORAGE TANK REQUIREMENTS FOR ELASTOMER
                          RAW MATERIALS
      HAP Stored
        Control  Required by HONa
   Largeb Tanks	   Smallb Tanks
 Acrylamide
 Acrylic acid
 Acrylonitrile
 1,3-Butadiene
 Carbon tetrachloride
 Chloroprene
 Epichlorohydrin
 Ethyl Acrylate
 Ethylene dichloride
 FormaIdehyded
 n-Hexane
 Methyl chloride
 Toluene
 Styrene
 Vinylidene chlorine
       None
      Control
      Control
Restricted Control
      Control
      Control
       None
   None/Control
      Control
       None
      Control
Restricted Control
      Control
   None/Control
Restricted Control
       None
      Control
      Control
Restricted Control
      Control
      Control
       None
       None
       None
       None
      Control
Restricted Control
       None
       None
Restricted Control
a  The HON requires control by one of three methods: internal
floating roofs, external floating roofs, or closed vent systems
to a control device that achieves 95 percent control.  "Control"
indicates storage vessels containing the noted HAP have choice of
one of these three options.  "Restricted control" indicates that
the only acceptable control option is a closed vent system and a
control device.  None/Control means that controls are not
required for existing sources, but control would be required for
vessels at new sources.
b  Large vessels are those with capacities greater than 40,000
gallons.  Small tanks are those with capacities between 20,000
and 40,000 gallons.
c  Formaldehyde is stored as formalin,  which is a 50 percent
formaldehyde solution in water.  While the vapor pressure of pure
formaldehyde would require control by a closed vent system and a
control device, the vapor pressure of formaldehyde over water
would is quite low and would not trigger any HON control.

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                                12

all vents, unless the vent clearly originated from a batch
process, in which cases the Batch ACT was used.  In a few
situations the vent appeared to be a batch vent, but this was not
explicitly stated.  In these situations both the HON and Batch
ACT were.applied.

     For each reported vent stream at each facility, EC/R
identified the vent as "greater than HON/ACT," "less than
HON/ACT," or "greater than HON/ACT."  Then the front-end process
vent level of control for each facility was classified, and the
subcategory floor determined as discussed above in the general
HON-approach section.

Wastewater

     The HON requires wastewater streams at existing sources that
have a total volatile organic HAP concentration of 1,000 ppmw or
greater and a flow rate of 10 liters per minute or greater  (at
the point of generation), or a total volatile organic HAP
concentration of 10,000 ppmw or greater at any flow rate, to be
managed in controlled equipment and treated to reduce the HAP
concentration.

     EC/R applied these criteria to uncontrolled wastewater
streams at each facility.  Where possible, the wastewater stream
characteristics provided by industry were used.  Where
appropriate data were not provided, EC/R extrapolated flow rates,
HAP concentrations, and emissions from other facilities in the
subcategory.  The stream characteristics were then compared to
the HON applicability criteria to assess whether the HON would
require control.  In situations where a wastewater stream was
controlled using a steam stripper or other HON-acceptable control
method, EC/R compared the flow and HAP concentration of the
stream prior to the control device, to assess whether the stream
would have required control based on the HON criteria.

     It should be noted that the information regarding wastewater
control appears to be inconsistent.  During meetings with
industry representatives, control of wastewater using steam
strippers has been indicated to be quite common in this
industry.2>3>4   However, the plant-specific data provided in
response to Section 114 information requests, which were used in
the floor analyses, do not show significant control.

     Each wastewater stream, and in turn each facility, was
classified as "less than HON," "equal to HON," or "greater than
HON."  The floor for wastewater for each subcategory was then
determined as discussed above in the general HON-approach
section.

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Equipment Leaks

     The HON equipment leak provisions require a combination of
leak, detection, and repair (LDAR)  procedures and equipment
requirements.  Six of the subcategories included in this project
are subject to the HON equipment leak provisions through
subpart I of part 63.  Specifically, these subcategories are
EPDM, HYP, PBR/SBR-S, PSR, SBL, and SBR-E.  Therefore, all
facilities in these subcategories are required to have a HON
equipment leak program in place.  However, the requirements of
subpart I are HAP-specific and may not affect all components in
HAP service at the facility.  Facilities that reported the use of
HAP's other than those covered by subpart I were assumed to not
be controlled to the HON level.

     In order to compare the existing control levels to the HON
levels for the remaining subcategories, baseline control levels
were assessed for each type of component at each facility.  These
levels were based on information submitted by the facility or on
State equipment leak regulations affecting the facility.

     A qualitative assessment was then made for each facility to
determine whether the existing level of control was less than,
equal to, or greater than the HON.   For facilities in these
subcategories, the baseline level of control was always
determined to be less than the HON.

HON-Based Approach - New Sources

     The HON-based approach used for new sources was similar to
the existing source approach.  The existing level of control for
each emission point was compared with the level that would be
required by the HON new source requirements.  No difference
exists in the Batch ACT requirements for new and existing
sources.

     After each emission point at each facility was characterized
as less than, greater than, or equal to, the new source HON, all
emission points of a given emission source type were grouped
together and a facility-wide determination was made for each
emission source type.  This determination was conducted as
described in the existing source general approach discussion.

     The new source floor was then defined for each emission
source type for each subcategory as less than, equal to, or
greater than, the new source HON level of control.  This
determination was based on the single facility with the highest
level of control in the subcategory.  If a single facility was
classified as equivalent to the new source HON, and no facilities
were classified as greater than the new source HON, the new
source floor was identified as the new source HON level of
control.  However, if one facility was classified as greater than

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                                14

the new source HON, the determination of a new source floor
greater than the new source HON level was necessary.

Approach For Process Back-End Emissions - Existing Sources

     As noted above, emissions from the back-end of elastomer
production processes are not amenable to HON-type applicability
and control provisions.  In only one instance did a facility
report that add-on control was used to reduce back-end HAP
emissions [a facility producing polybutadiene rubber and styrene-
butadiene rubber by solution (PBR/SBR-S)].  However, facilities
in three subcategories [ethylene propylene rubber (EPR),
PBR/SBR-S, and SBR-E] reported permit conditions requiring that
the amount of residual HAP remaining in the polymer be reduced by
"improved stripping" prior to drying (i.e., "residual HAP
limits").

     MACT floors were determined on a subcategory-specific basis
for the back-end emissions from these three subcategories.  The
format for each floor is in terms of stripper performance, or the
amount of HAP remaining in the polymer after the stripping step.
In the cases of EPR and PBR/SBR-S,  the floor is expressed as the
weight of residual HAP per weight of dry polymer.  In the case of
SBR-E, the floor is expressed as the weight of residual HAP per
weight of latex leaving the stripper.  These formats were
selected to be compatible with the formats of applicable State
permit conditions for the three subcategories.

     A number of statistical parameters can be used to establish
the numerical level of the MACT floor, including the arithmetic
mean, median, or mode.  Because the format of the floor is in
terms of HAP per polymer produced,  and production data were often
claimed as confidential, the selection of any specific parameter
is complicated by the need to maintain confidentiality,  and by
the small number of plants in each subcategory.  That is, if the
floor for a given subcategory was based on a rigorously computed
arithmetic mean, companies could use the floor to calculate
production figures for their competitors.  To avoid this problem,
the floor for each subcategory was established at a level between
the mean, median, and mode.  The confidential files for this
docket contain a memorandum that describes in more detail the
basis of the MACT floors for back-end operations.^*

     In each case, the floor is expressed as a maximum weekly
average residual HAP level.  For SBR-E, the weekly floor was
computed from maximum weekly average HAP in latex data submitted
by the plants.  For EPR and PBR/SBR-S, the weekly floors are
based largely on annual emissions and production data submitted
by the plants.  A limited amount of weekly data were used to
adjust the annual data to allow for some temporal variability in
residual HAP levels.

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                                15

     The weekly time frame was selected for two reasons.  First,
the waiting period to obtain residual monomer results for a given
sample will be up to three days for some categories.  The weekly
timeframe allows a plant to compensate for a "bad" batch and
still achieve the standard.  Second, some grades of polymer are
more difficult to strip than others.  Because the MACT floor is
based on an overall average, some of the less strippable grades
may have residual HAP levels that exceed the average floor level.
A shorter timeframe might preclude plants from producing these
grades at all.  The weekly timeframe gives plants the opportunity
to continue producing these grades, as long as average emissions
are below the standard.

     Carbon disulfide emissions.  The discovery of carbon
disulfide emissions from dryer vents at SBR-E facilities occurred
relatively late in the information gathering process for this
standard.  Therefore, the amount of information available to
determine the floor for this emission source was limited.  Data
were provided that indicated measured carbon disulfide
concentrations in dryer stacks.  The MACT floor was calculated as
the average of the concentrations for those grades of SBR-E
polymer that used a sulfur-containing shortstopping agent in
their production.

Approach For Process Back-End Emissions - New Sources

     The new source MACT floors for back-end process emissions
should represent the level achieved by the best-performing single
facility.  However, a major problem exists in the use of this
approach, because the emission factor or residual HAP level for a
single facility is almost always confidential, so the actual
level of the standard could not be revealed.

     Therefore, the following approach was used to set the new
source MACT floor.  The ratio of the existing source MACT floor
emission factor/residual HAP level to the best performing single
facility emission factor/residual HAP was determined for each
subcategory.  The arithmetic average of all subcategory ratios
was then applied to the existing source floor levels to determine
new source floors.

     The following example is provided to illustrate this
approach.  Assume' existing source MACT floor emission factors for
three subcategories were 5, 10, and 15 kilograms per Megagram of
rubber.  The corresponding emission factors for the three best
controlled facilities in each subcategory were 2, 3, and 5,
respectively.  The ratios of the best controlled source to the
existing source floor are therefore 0.4 (2-^-5), 0.3  (3-^10), and
0.33 (5-M5) .  The arithmetic average of the ratios is 0.34.  This
average ratio was then applied to each of the existing source
floors to set the new source level, which would be 1.7, 3.4, and
5.15 kilograms per Megagram.

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                               16

RESULTS OF ANALYSIS
     Table 2 presents a summary of the MACT floors.   In the
following sections, results of the analyses are presented.  For
each subcategory, the existing and new source MACT floor
conclusions are provided, along with a brief discussion.
Attachment 1 to this memorandum includes a series of tables
detailing the facility-specific existing control levels and floor
conclusions.

Butyl Rubber

     Butyl rubber is a single plant subcategory.  Therefore, the
existing level of control at this facility represents the MACT
floor for the subcategory.

     The three HAPs stored at the butyl rubber facility are
hexane, methyl chloride, and methanol.  All of the storage
vessels are controlled in accordance with the HON.  Therefore,
the floor for storage vessels was determined to be equal to the
HON.

     All front-end process vent streams are controlled by a
flare.  However, the streams would be classified as halogenated
vent streams under the HON.  The HON does not allow the control
of a halogenated vent stream using a flare, but would require the
stream be controlled by an incinerator followed by a scrubber.
Therefore, the existing level of control for these vents is less
stringent than the HON.  In addition, an uncontrolled maintenance
vent exists that appears to be a batch process vent.  Application
of the Batch ACT criteria showed that this vent would require
control.  The floor for front-end process vents was determined to
be less stringent than the HON/ACT.

     Because no add-on control or permit conditions were reported
for the process back-end, the floor for process back-end
emissions was defined as no control.

     Uncontrolled wastewater streams were reported by the
facility that would be subject to the HON control requirements.
Therefore, the floor for wastewater was determined to be less
stringent than the HON.

     The facility reported that equipment leak emissions were
controlled by the combination of a leak detection and repair
program and some "leakless" equipment.  However, elements of the
program were less stringent than the HON level, so the floor for
equipment leaks was determined to be less stringent than the HON.

     In summary, the MACT floors for the butyl rubber subcategory
are as follows.  For storage vessels, the floor was determined to
be equal to the HON.  For front-end process vents, wastewater,
and equipment leaks, the floor was determined to be less
stringent than the HON  (HON/ACT).  For back-end process

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                               18

emissions, the floor was determined to be no control.

Epichlorohydrin Elastomer

     Epichlorohydrin elastomer is a single plant subcategory.
Therefore, the existing level of control at this facility
represents the MACT floor for the subcategory.

     The HAP's reported to be stored at the epichlorohydrin
facility are epichlorohydrin, propylene oxide,  ethylene oxide,
and toluene.  All of the storage vessels are controlled in
accordance with the HON, so the floor for storage vessels was
determined to be equal to the HON.

     All reported front-end process vent streams are controlled
by a flare.  However, sufficient information was not provided to
estimate the stream characteristics prior to the flare.  This
control, and therefore the floor, was assumed to be equal to the
HON/ACT.

     Because no add-on control or permit conditions were reported
for the process back-end, the floor for process back-end
emissions was defined as no control.

     No wastewater streams were reported by the facility that
would be subject to the HON control requirements, and no
wastewater control was reported.   Therefore, the floor for
wastewater was determined to be equal to the HON.

     The facility reported that equivalent leak emissions were
controlled by a leak detection and repair program.  However,
elements of the program were less stringent than the HON level,
so the floor for equipment leaks was determined to be less
stringent than the HON.

     In summary, the MACT floors for the epichlorohydrin
elastomer subcategory are as follows.  For storage vessels and
wastewater, the floor was determined to be equal to the HON.  For
equipment leaks, the floor was determined to be less stringent
than the HON.  The floor for front-end process vents was assumed
to be equal to the HON/ACT.  For back-end process emissions, the
floor was determined to be no control.
                 \

Ethylene Propylene Rubber

     Five active facilities were identified that produce ethylene
propylene rubber.  As discussed in the subcategorization
memorandum, four of the EPDM facilities employ a solution process
that uses a HAP solvent  (hexane), and the fifth uses a suspension
process.1  The suspension process facility was  included in the
determination of MACT floors using the HON-based approach.
However, the differences in the processes made consideration of

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the suspension process inappropriate in the calculation of the
process back-end floor.

     The HAP's stored at EPDM facilities include hexane and
toluene.  Four of the five EPDM facilities reported existing
storage tank controls that were less stringent than the level of
control that would be required by the HON.  The controls less
stringent than the HON included hexane tanks controlled by
condensers with control efficiencies less than the HON, and
toluene and hexane storage tanks with fixed roof uncontrolled
tanks.  One facility did not report sufficient information to
determine a classification for storage tank controls.  Because
four of the five facilities are controlled at a level less
stringent than the HON, the floor for storage vessels was
determined to be less stringent than the HON.

     No EPDM facility reported a batch process, so the HON
process vent provisions were applied to all front-end process
vents.  At one facility, the estimated TRE of a controlled stream
was greater than 1.0, so controls at this facility were more
stringent than the HON.  One facility reported that a halogenated
vent stream was controlled by a boiler, and an uncontrolled vent
stream with a TRE less than i.o.  Another facility also had an
uncontrolled vent stream with a TRE less than 1.0.  Controls at
these two facilities were less stringent than the HON.  One
facility reported controls in accordance with the HON.  The final
facility did not report sufficient information for front-end
process vents.  With two facilities equal to the HON, one less
than, and one greater than, the floor for front-end process vents
was determined to be less stringent than the HON/ACT.

     One EPDM facility reported a residual HAP permit condition,
establishing that the reduction of back-end HAP emissions was
demonstrated for this subcategory.  The average, mode, and median
annual emission factors were determined and adjusted to weekly,
as described in the approach section.  For existing sources, the
floor was determined to be 7 kg HAP per megagram dry crumb
rubber, on a weekly average basis.  The new source floor was
determined to be 4 kg/Mg.  As noted above, the suspension process
EPDM facility was not included in the back-end floor analysis.

     No wastewater streams exist at EPDM facilities with reported
(or extrapolated) characteristics that would require control by
the HON, and no wastewater controls were reported.  Therefore,
the floor was determined to be equal to the HON for wastewater.

     Four facilities reported that equipment leak emissions were
controlled by a leak detection and repair program, and one
facility also reported some leakless equipment.  However,
elements of the programs at three of these facilities were less
stringent than the HON level.  The program at the fourth facility
appeared to be very similar the HON.  One facility did not report
any program.  Because four of five facilities were less than the

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                               20

HON, the floor for equipment leaks was determined to be less
stringent than the HON.

     In summary, the MACT floors for the ethylene propylene
rubber subcategory are as follows.   For storage vessels, front-
end process vents, and equipment leaks, the floor was determined
to be less stringent than the HON (HON/ACT).   For wastewater, the
floor was determined to be equal to the HON.   For back-end
process emissions, the floor was determined to be the arithmetic
average of the back-end emission factors for the facilities using
the solution process.

Halobutyl Rubber

     Halobutyl rubber is a single plant subcategory.  Therefore,
the existing level of control at this facility represents the
MACT floor for the subcategory.

     At the halobutyl rubber facility, hexane was stored in fixed
roof uncontrolled tanks, and control would be required by the
HON.  Therefore, the floor for storage vessels was determined to
be less stringent than the HON.

     At the butyl rubber facility,  three halogenated streams are
controlled by a flare.  The HON does not allow the control of a
halogenated vent stream using a flare, but would require the
stream be controlled by an incinerator followed by a scrubber.  A
fourth vent stream entering the flare has a TRE greater than 1.0,
which is control more stringent than the HON.  A comparison was
made between the existing HAP emissions level and the emissions
level that would result from application of only HON controls.
The result is that the HAP emissions at the existing level of
control were over three times greater than the emissions that
would result after application of the HON.  This difference was
primarily due to the reduction in the Hcl emissions from the
flare.  Therefore, the floor for front-end process vents was
determined to be less stringent than the HON/ACT.

     Because no add-on control or permit conditions were reported
for the process back-end, the floor for process back-end
emissions was defined as no control.

     No wastewater streams were reported by the facility that
would be subject to the HON control requirements, and no
wastewater control was reported.  Therefore,  the floor for
wastewater was determined to be equal to the HON.

     The facility reported that equipment leak emissions were
controlled by a leak detection and repair program.  However,
elements of the program were less stringent than the HON, so the
floor for equipment leaks was determined to be less stringent
than the HON.

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                                21

     In summary, the MACT floors for the halobutyl rubber
subcategory are as follows.  For wastewater, the floor was
determined to be equal to the HON.   For storage, front-end
process vents, and equipment leaks, the floor was determined to
be less stringent than the HON  (HON/ACT).   For back-end process
emissions, the floor was determined to be no control.

Hypalon™

     Hypalon™ is a single plant subcategory.  Therefore, the
existing level of control at this facility represents the MACT
floor for the subcategory.

     At the Hypalon™ facility, all storage vessels are controlled
in accordance with the HON, and the floor for storage vessels was
determined to be equal to the HON.

     This facility reported two uncontrolled front-end process
vents.  Both vents had TREs greater than 1.0, and would not
require control by the HON.  Therefore, the floor for front-end
process vents was determined to be equal to the HON.

     Because no add-on control or permit conditions were reported
for the process back-end, the floor for process back-end
emissions was defined as no control.

     No wastewater streams were reported that would require
control by the HON, and no wastewater control was reported.
Therefore, the floor for wastewater was determined to be equal to
the HON.

     As noted earlier, Hypalon™ is one of the subcategories
subject to the HON equipment leak provisions.  All components ih
HAP service at this facility are expected to be subject to the
HON requirements.  Therefore, the floor was determined to be
equal to the HON for equipment leaks.

     In summary, all MACT floors for the Hypalon™ subcategory
were determined to be equal to the HON  (HON/ACT), except for
back-end process emissions.  For back-end process emissions, the
floor was determined to be no control.

Neoprene

     Three active facilities were identified that produce
neoprene.  These three facilities were used in the determination
of MACT floors.

     The primary HAP used in this subcategory is chloroprene, and
all three facilities reported that chloroprene storage vessels
were controlled at a level less stringent than the HON.
Therefore, the floor for storage vessels was determined to be
less stringent than the HON.

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                               22

     Two of the facilities reported information for uncontrolled
front-end process vents where control would be required by the
HON.  Therefore, the floor for front-end process vents was
determined to be less stringent than the HON.

     Because no add-on control or permit conditions were reported
for the process back-end at any neoprene facility, the floor for
process back-end emissions was defined as no control.

     No reported wastewater streams exist at neoprene facilities
with characteristics that would require control by the HON, and
no wastewater control was reported.  The floor for wastewater was
determined to be equal to the HON.

     All three neoprene facilities reported that equipment leak
emissions were controlled by a leak detection and repair program.
However, elements of all three programs were less stringent than
the HON, so the floor for equipment leaks was determined to be
less stringent than the HON.

     In summary, the MACT floors for the neoprene subcategory are
as follows.  For wastewater, the floor was determined to be equal
to the HON.  For storage, front-end process vents, and equipment
leaks, the floor was determined to be less stringent than the HON
(HON/ACT).  For back-end process emissions, the floor was
determined to be no control.

Nitrile Butadiene Latex

     Three facilities were identified that produce nitrile-
butadiene latex.  Each of these facilities also produce styrene-
butadiene latex, and equipment is sometimes shared between these
two products.  A separate analysis was conducted for NBL,
although the primary product at one or more of these facilities
may be SBL, and not NBL.

     The HAP's reported to be stored at NBL facilities include
acrylonitrile, styrene, ethyl acrylate, 1,3-butadiene, acrylic
acid, vinylidene dichloride, and formaldehyde (formalin).  Each
facility reported that acrylonitrile was stored in fixed roof
uncontrolled tanks, which would require control under the HON.
Similarly, acrylic acid was stored in fixed roof uncontrolled
tanks at two facilities.  The butadiene and vinylidiene chloride
were stored in pressure tanks.  Because all three facilities were
controlling storage vessels at a level less than the HON, the
MACT floor was determined to be less stringent than the HON.

     It is believed that at least some of the front-end
operations at NBL facilities are batch.  However, information
submitted by the facilities did not identify which of the front-
end process vents were from batch processes.  Therefore, the HON
and Batch ACT 90 percent applicability criteria were applied to
all vents for comparison with existing controls.  Each facility

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controls one or more front-end process vents using a combustion
device.  Both the HON and Batch ACT were determined to require
control for all these vents.  Further, all uncontrolled vents at
these facilities would not be subject to control under either the
HON or Batch ACT.  Therefore, the level of control for NBL front-
end process vents was determined to be equal to the HON/ACT.

     As indicated by the word "latex" contained in the name of
the subcategory, the final product is a latex and not a dried
solid.  Operations after the stripper at NBL facilities have
little HAP emission potential due to the low residual
acrylonitrile concentrations.  The floor for NBL back-end process
emissions was determined to be no control.

     No wastewater controls were reported at any NBL facility.
At two facilities, all reported streams were below the HON
applicability criteria.  At the third facility, one uncontrolled
wastewater stream was reported for which the HON would require
control.  Because two of three facilities were at the HON level,
the floor for wastewater was determined to be equal to the HON.

     Because these facilities also produce SBL, each is subject
to the HON equipment leak provisions for components in styrene
and butadiene service used to produce SBL.  Many of the
components in butadiene service are anticipated to be shared with
the NBL process.  Therefore, an equipment leak program equivalent
to the HON is required at each NBL facility.  However, each
facility was assumed to be controlled at a level less stringent
than the HON because components in acrylonitrile service are not
subject to the HON provisions.  Therefore, the floor for
equipment leaks was determined to be less stringent than the HON.

     In summary, the MACT floors for the nitrile butadiene latex
subcategory are as follows.  For front-end process vents and
wastewater, the floor was determined to be equal to the HON
(HON/ACT).  For storage and equipment leaks, the floor was
determined to be less stringent than the HON.  For back-end
process emissions, the floor was determined to be no control.

Nitrile-Butadiene Rubber

     Four active facilities were identified that produce nitrile
butadiene rubber.'  At one facility, the NBR equipment is also
used to produce SBR by the emulsion process, as well as SBL.
Information submitted by this facility related to NBL production
was included in the floor analyses for this subcategory.

     Industry requested that separate subcategories be created
for batch NBR and continuous NBR processes, because two
facilities use continuous processes and two use batch
processes6*7  The EPA recognizes differences  in emissions and
control technologies for batch and continuous processes.
However, separate subcategories were not created because the EPA

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                               24

believes that the use of both the HON and Batch ACT process vent
provisions is satisfactory to address differences in batch and
continuous process vents.  Furthermore,  the EPA believes the HON
storage, wastewater,  and equipment leak provisions are applicable
to batch processes, and that batch processes may be compared with
continuous processes using the HON-based approach described
earlier in this memorandum.

     Two facilities reported storage vessel controls less
stringent than the HON.  At one,  acrylonitrile was stored in
fixed roof uncontrolled tanks, and the other facility vented an
acrylonitrile storage vessel to a scrubber with an efficiency
less than the 95 percent required by the HON.  At one facility,
all HAP storage tanks are vented to a flare.  The fourth facility
did not submit sufficient information to allow a classification
for storage vessels.   Therefore,  because two of three facilities
submitting sufficient information were controlled at a level less
than the HON, the floor was determined to be less stringent than
the HON for storage vessels.

     The two continuous process facilities control front-end
process vents with combustion devices meeting the HON
requirements.  These vents are estimated to require control under
the HON process vent provisions,  making these two facilities
equal to the HON.  At the two batch facilities, all front-end
process vents were uncontrolled,  but all vents would not require
control based on the Batch ACT criteria.  Therefore, the floor
for NBR front-end process vents was determined to be equal to the
HON/Batch ACT.

     Because no add-on control or permit conditions were reported
for the process back-end at any NBR facility, the floor for
process back-end emissions was defined as no control.

     Based on the available information, no wastewater streams
are estimated to exist at NBR facilities with characteristics
that would require control by the HON.  Further, no wastewater
control was reported at any NBR facility.  Therefore, the floor
for NBR wastewater was determined to be equal to the HON.

     Two facilities reported that emissions from equipment leaks
were controlled by leak detection and repair programs.  However,
elements of the programs were less stringent than the HON, so
these two facilities were determined to be less stringent than
the HON.  For the facility that also produces SBR-E, a HON
program is in place for components in styrene and butadiene
service used to produce SBR-E.  Many of the components in
butadiene service are estimated to be shared with the NBR process
at this facility.  However, this facility was also assumed to be
controlled at a level less stringent than the HON because
components in acrylonitrile service are not subject to the HON
provisions.  The final facility did not report any program to
reduce emissions from leaking equipment.  Therefore, the floor

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                               25

for equipment leaks was determined to be less stringent than the
HON.

     In summary, the MACT floors for the nitrile butadiene rubber
subcategory are as follows.  For front-end process vents and
wastewater, the floor was determined to be equal to the HON
(HON/ACT).  For storage and equipment leaks, the floor was
determined to be less stringent than the HON.  For back-end
process emissions, the floor was determined to be no control.

Polybutadiene Rubber and Styrene-Butadiene Rubber by Solution

     Four active facilities were identified that produce both PER
and SBR using the solution process, and another facility that
produces PER using the solution process.  As discussed in the
subcategorization memorandum, the four facilities producing both
SBR and PER use a HAP (hexane or toluene) solvent.   The facility
producing only PER reported the use of a non-HAP solvent.
Representatives of this company have indicated that one of their
two PER processes is in the process of switching to a HAP
solvent.   The non-HAP process facility was included in the
determination of MACT floors using the HON based approach.
However, the differences in the processes made consideration of
the non-HAP process facility inappropriate in the calculation of
the back-end floor.

     Two of the facilities reported storage vessel controls more
stringent than the HON.  In both instances, this was because
styrene tanks, which would not require control under the HON,
were controlled with floating roofs.  The three remaining
facilities controlled hexane, styrene, and butadiene in a manner
that was equivalent to HON controls.  Therefore, the floor for
PBR/SBR-S storage vessels was determined to be equal to the HON.

     It was assumed that all front-end process vents at these
facilities are continuous, so the HON process vent provisions
were used to determine the floor.  At two facilities, all front-
end vents were combined and routed to a flare, and one or more of
the vent streams would not have required control under the HON.
Therefore, these two facilities were classified as greater than
the HON.  One facility controlled all vents that would have
required control under the HON, and all uncontrolled vents would
not have required HON control.  The final two facilities did not
report any control, and did not report any vent streams that
would have required HON control.  Because three facilities were
determined to be equivalent to the HON, the floor for PBR/SBR-S
front-end process vents was determined to be equal to the HON.

     One PBR/SBR-S facility reported a permit condition limiting
dryer emissions, and another reported that all dryer vents were
vented to a boiler.  These instances establish that the reduction
of PBR/SBR-S back-end HAP emissions was demonstrated for this
subcategory.  The average, mode, and median annual emission

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                               26

factors were determined and adjusted to weekly, as described in
the approach section.  For existing sources, the floor was
determined to be 5 kg HAP per megagram dry crumb rubber, on a
weekly average basis.  The new source floor was determined to be
3 kg/Mg.   As noted above, the facility using a non-HAP solvent
was not included in the back-end floor analysis.

     No wastewater streams exist at PBR/SBR-S facilities with
reported (or extrapolated) characteristics that would require
control by the HON, and no facilities reported wastewater
controls.  Therefore, the floor for wastewater was determined to
be equal to the HON.

     Producers of PER and SBR are subject to the HON equipment
leak provisions, but only for components in styrene and butadiene
service.  Therefore, each PBR/SBR-S facility is required to have
a HON equipment leak program in place.  However, each of the four
HAP solvent facilities was assumed to be controlled at a level
less stringent than the HON because components in hexane or
toluene service are not subject to the HON provisions.
Therefore, the floor for equipment leaks was determined to be
less stringent than the HON.

     In summary, the MACT floors for the polybutadiene and
styrene-butadiene by solution subcategory are as follows.  For
storage vessels, front-end process vents, and wastewater, the
floor was determined to be equal to the HON (HON/ACT).  For
equipment leaks, the floor was determined to be less stringent
than the HON.  For back-end process emissions, the floor was
determined to the average of the back-end emission factors for
the facilities using a HAP solvent.

Polysulfide Rubber

     Polysulfide rubber is a single plant subcategory.
Therefore, the existing level of control at this facility
represents the MACT floor for the subcategory.

     At the polysulfide rubber facility, ethylene oxide, ethylene
dichloride, and formaldehyde (formalin) were stored in accordance
with HON requirements.  Therefore, the floor was determined to be
equal to the HON for storage tanks.

     The front-end process vent information submitted by the
polysulfide rubber facility indicated that no control was
present.  No control would be required by the HON, so the floor
was determined to be equal to the HON for front-end process
vents.

     Because no add-on control or permit conditions were reported
for the process back-end, the floor for process back-end
emissions was defined as no control.

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     No wastewater streams were reported by the facility that
would be subject to the HON control requirements, and no
wastewater control was reported.  Therefore, the floor for
wastewater was determined to be equal to the HON.

     The facility reported no information on the control of
emissions from equipment leaks.  Therefore, the floor for
equipment leaks was determined to be less stringent than the HON.

     In summary, the MACT floors for the polysulfide rubber
subcategory are as follows.  For storage vessels, front-end
process vents, and wastewater, the floor was determined to be
equal to the HON.  For front-end process vents, and equipment
leaks, the floor was determined to be less stringent than the
HON.  For back-end process emissions, the floor was determined to
be no control.

Styrene-Butadiene Latex

     As noted above, the styrene-butadiene latex subcategory was
the only subcategory containing more than 5 sources.  Seventeen
facilities were identified that currently produce SBL.  One of
these facilities began operations after the original information
requests were made, so this facility was not included in the
floor analyses.  Another facility is a styrene-butadiene rubber
by emulsion facility that removes a stream of latex (after
stripping but prior to coagulation) from the rubber production
line and blends and finishes it to make a final latex product.
This facility was also not included in the MACT floor analyses.

     The first step was to identify the best performing 5
facilities.  Because the MACT floor analysis was conducted on a
"plank" basis, the best performing 5 facilities were determined
separately for each emission source type.

     For storage vessels, the HON storage vessel provisions were
used to determine the best performing 5 facilities.  Each SBL
facility was classified as less than, greater than, or equal to
the HON storage vessel control level.  This analysis showed that
one facility controls storage vessels at a level more stringent
than the HON, six with controls equal to the HON, and six with
controls less stringent than the HON.  A facility's relationship
to the HON was assumed to be a direct reflection of the level of
control.  In other words, those facilities with controls greater
than the HON were considered to be the best controlled
facilities.  Therefore, the best controlled five facilities
consist of four with controls equal to the HON, and one with
controls greater than the HON.  The floor for SBL storage vessels
was determined to be equal to the HON.

     For front-end process vents, an emission factor approach was
used to identify the best performing 5 facilities.  The use of an
emission factor  (HAP emissions per unit of production) would take

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                               28

into account process modifications and other pollution prevention
actions that decrease HAP emissions,  eliminating the need for
add-on control.  The five SBL facilities with the lowest emission
factors were identified as the best controlled.   The HON/Batch
ACT approach was then used to determine the "average" control of
these five.  Of these five, one was determined to control at a
level more stringent than the HON/ACT, and the remaining four
were classified as equal to the HON/ACT.  Therefore, the floor
for SBL front-end process vents was determined to be equal to the
HON/ACT.

     The final product is a latex, meaning a liquid rather than a
dried solid.  Operations after the stripper at SBL facilities
have little HAP emission potential due to the low residual
styrene concentrations.  The floor for SBL back-end process
emissions was determined to be no control.

     Similar to storage vessels,  a HON-comparison approach was
used to identify the five SBL facilities with the best wastewater
control.  Actually, no SBL facility reported wastewater control
for any stream.  Two facilities reported  (or extrapolated)
streams that would require control under the HON, making them
less stringent than the HON.  Therefore, the remaining 13
facilities, and the MACT floor for SBL wastewater, were
determined to be equal to the HON.

     The HON was used to identify the best controlled facilities
for equipment leaks.  Producers of SBL are subject to the HON
equipment leak provisions for components in styrene and butadiene
service.  Several facilities reported the use of other HAP's in
the production of SBL, but seven reported the use of styrene and
butadiene only.  Therefore, all components in HAP service at
these seven facilities are required to be controlled at the HON
level.  No facility reported a program more stringent than the
HON level.  Therefore, the floor for SBL equipment leaks was
determined to be equal to the HON.

     In summary, all MACT floors for the styrene-butadiene latex
subcategory were determined to be equal to the HON, except for
back-end process emissions.  For back-end process emissions, the
floor was determined to be no control.

Styrene-Butadiene Rubber by Emulsion

     Four active facilities were identified that produce styrene-
butadiene rubber using the emulsion process.  These four
facilities were used in the determination of MACT floors.

     Two of the four SBR-E facilities reported existing storage
tank controls equal to the HON.  One facility reported that
styrene was stored in tanks vented to a carbon adsorber, which is
more stringent control than the HON.  The fourth facility did not
report sufficient information to allow a comparison to the HON

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level of control.  The majority of facilities in this subcategory
(for which information was available)  controlled emissions equal
to the HON.  Therefore, the floor for SBR-E storage vessels was
determined to be equal to the HON.

     For front-end process vents, three facilities reported
control for all vents with TREs less than 1.0 and all streams
with TREs greater than 1.0 were uncontrolled.  Therefore, these
three facilities were classified as equal to the HON.  Sufficient
information was not available to reach a conclusion for the
fourth facility.  Therefore, the floor for SBR-E front-end
process vents was determined to be equal to the HON.

          Three of the four SBR-E facilities reported permit
conditions limiting the amount of residual styrene in the
stripped latex prior to coagulation.  This establishes that the
reduction of SBR-E back-end HAP emissions was demonstrated for
this subcategory.  Residual styrene in latex information was
provided by each of the four facilities.  The average, mode, and
median maximum weekly residual styrene limits were determined as
described in the approach section.  For existing sources, the
floor was determined to be 0.35 kg HAP per megagram latex, on a
weekly average basis.  The new source floor was determined to be
0.2 kg/Mg.

     One SBR-E facility reported a controlled wastewater stream
whose extrapolated flow and concentration were below the HON
applicability levels, making the wastewater controls at this
facility greater than the HON.  Two facilities reported no
control, and no streams that would require control.  The fourth
facility reported control for a stream that would not require
control under the HON, but also reported flows and concentrations
for two uncontrolled streams that would require HON control.  For
this facility, a comparison was done between the existing
emission levels and the levels that would be present if control
was applied only to the HON streams.  This revealed that total
plantwide emissions would be slightly lower at the HON level of
control, resulting in the classification of this facility as less
than the HON.  With two facilities equal to the HON, one more
stringent, and one less stringent, the MACT floor for SBR-E
wastewater was determined to be equal to the HON.

     As noted previously, producers of SBR are subject to the HON
equipment leak provisions for components in styrene and butadiene
service.  No SBR-E facility reported the use of any HAP other
than styrene and butadiene, leading to the conclusion that all
components in HAP service are subject to HON control.  Therefore,
the floor for equipment leaks was determined to be equal to the
HON.

     In summary, all MACT floors for the styrene-butadiene rubber
by emulsion subcategory were determined to be equal to the HON,
except for back-end process emissions.  For back-end process

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                               30

emissions, the floor was determined to be the average residual
styrene concentration in the stripped latex.

REGULATORY ALTERNATIVES BEYOND THE MACT FLOORS

     Except in a few limited cases, only one regulatory
alternative was developed and analyzed for each subcategory.
Table 3 presents the regulatory alternatives by subcategory for
the Polymers and Resins I subcategories.  The rationale for the
level of this alternative is discussed below.

     If the MACT floor for an emission source type was determined
to be less stringent than the HON/ACT level of control, the
regulatory alternative included the HON/ACT level of control for
that emission source, and not the MACT floor.  The rationale for
this action was that in the extensive evaluation of the HON
requirements, the EPA concluded that the cost and other impacts
of the HON-level of control were reasonable for storage vessels,
continuous process vents, wastewater, and equipment leaks.
Similarly, the EPA determined that the cost and other impacts
associated with the Batch ACT 90 percent level of control were
reasonable.  Based on these previous analyses, the EPA determined
that an increased stringency of the single regulatory alternative
beyond the MACT floor level was acceptable.

     While the EPA did make the general decision described in the
previous paragraph without regard to specifics of the elastomer
industry, industry specific considerations were considered in
subsequent analyses when the MACT floor was determined to be less
stringent than the HON/ACT.  If special circumstances were
identified for a subcategory that increased the cost (or other
impacts) of the HON or Batch ACT controls to a level the EPA no
longer considered reasonable, a regulatory alternative less
stringent than the HON level (but at least as stringent as the
MACT floor) was identified and analyzed.  The only occurrences of
this type were for process vents at the butyl rubber and
halobutyl subcategories, which are both single-plant
subcategories.

     For butyl rubber and halobutyl front-end process vents, the
MACT floor was determined to be less stringent than the HON/ACT.
As discussed in the results section of this memorandum, both
facilities had unique circumstance related to a halogenated vent
streams controlled by a flare.  This circumstance was that
halogenated vent streams were vented to a flare, resulting in
hydrogen chloride emissions.  The HON would not allow a
halogenated vent stream to be controlled by a flare, meaning that
these facilities would need to install incinerators to control
the halogenated organic compound, followed by scrubbers to
control the hydrogen chloride generated by the combustion of the
halogenated organic.  The only emission reduction that could be
attributed to the HON level of control would be the hydrogen
chloride emissions, while the full cost of the incinerators and

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scrubbers would be incurred.   This made the HON level of control
very cost-ineffective for these subcategories.  An intermediate
regulatory alternative was developed that required the HON level
of control for all front-end  process vents, except for
halogenated vent streams that were already vented to a flare.
The HON level of control was  maintained as a second regulatory
alternative for both subcategories.

     If the MACT floor was determined to be equal to the HON, the
regulatory alternative was set at the MACT floor (i.e., the
HON/ACT).  If a MACT floor had been determined to be more
stringent than the HON/Batch  ACT, the regulatory alternative
would have needed to reflect  the MACT floor.  However, as
discussed in the results section of this memorandum, this
situation did not occur for any emission source type for any
subcategory for existing sources.

     During the development of the HON, alternatives more
stringent than the promulgated levels were considered and
rejected by the EPA.  Therefore,  controls more stringent than the
HON levels were not considered, because the EPA had previously
considered them unacceptable.

     Similarly, the Batch ACT analyzed and estimated impacts for
control levels more stringent than the 90 percent level.  As
noted above, the 90 percent level was selected because of the
relationship of the costs to  the environmental benefits.
Therefore, consideration of batch process vent control levels
more stringent than the 90 percent Batch ACT level was
unnecessary.

     Similar to existing sources, if the new source floor was
determined to be less stringent than the new source HON level,
the first regulatory alternative was raised to the new source HON
level.

REFERENCES

1.  Memorandum, from Clark, C. and Norwood, P., EC/R Inc. to
Evans, L. EPA/ESD/OCG.  Polymers and Resins I —
Subcategorization.  April 28, 1995.

2.  Radian Corporation.  Draft Meeting Minutes.  Styrene-
Butadiene Rubber by Emulsion  Industry with EPA.  September 20,
1993.

3.  Radian Corporation.  Draft Meeting Minutes.  Ethylene
Propylene Rubber and Nitrile  Butadiene Latex Industry with EPA.
September 22, 1993.

4.  Radian Corporation.  Draft Meeting Minutes.  Styrene
Butadiene Latex Industry and EPA.  September 22, 1993.

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                                33

5.   Norwood, P., EC/R Inc., to Evans, L.,  EPA/ESD/OCG.  May 23,
     1995.  MACT Floors for Back-end Process Operations for the
     Elastomer Production Industry (Polymers and Resins I).

6.  Letter from Killian/ R. International Institute of Synthetic
Rubber Producers, to Evans, L. U.S. Environmental Protection
Agency.  Requesting a separate subcategory for facilities
producing nitrile butadiene rubber by batch processes.  October
8, 1994.

7.  Letter from Herman, T. Zeon Chemicals USA, Incorporated, to
Norwood, L.P. EC/R Incorporated.  Providing information on
differences in nitrile butadiene rubber batch and continuous
processes.  August 8, 1994.

8.  Telecon.  Norwood, P. EC/R Incorporated with Butts, T. and
Eiselstein, C., Miles, Incorporated.   Discussion of Miles
ethylene propylene rubber and polybutadiene rubber processes.
June 28, 1994.

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MEMORANDUM

Date:     May 10, 1995

Subject:  Potential for New  Sources Producing Elastomers
          (Polymers and Resins  I)

To:       Leslie Evans, ESD/OCG

From:     Charlotte Clark,
I
I   E /R Incorporated.
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                                   Environmental Consulting and Research
     The purpose of this memorandum  is  to  discuss the potential
for construction or reconstruction of affected sources that would
produce elastomers in the Polymers and  Resins I source category.
Specifically, the memorandum  discusses  the potential for this new
source growth within 5 years  of  proposal of the standard, or by
2001. This potential was predicted using actual and projected
data on facility capacity, production,  and growth.

CONCLUSION

     No new sources that would be subject  to the proposed rule
are expected to be constructed or reconstructed before 2001 for
three reasons.  First, industry  production capacity for these
elastomers currently exceeds  demand  by  a significant margin, and
excess available capacity at  domestic synthetic rubber producers
can easily accommodate the expected  increase in demand over that
time period.  In support of this, no company has identified any
plans to construct or reconstruct a  facility that would be
subject to the proposed standard.  Second, synthetic rubber
production has become a global market,  and a significant amount
of unutilized capacity exists in other  areas of the world.
Third, new elastomers products  (not  included in the categories
listed under this rule) have  emerged that  will, if successful,
reduce demand for the listed  elastomers.   Therefore, estimates of
impacts and costs performed for  this regulatory effort assume no
construction or reconstruction of new sources in the first five
years of the standard.

BACKGROUND

     The U.S. Environmental Protection  Agency (EPA) is in the
process of establishing national emission  standards for hazardous
air pollutants  (NESHAP) for emissions of organic hazardous air
pollutants  (HAP) from production of  any of nine elastomeric
materials.  .These nine products  are  identified by the following
source category designations:
     •    Butyl rubber
     •    Epichlorohydrin elastomers
     •    Ethylene propylene  rubber
                3721-D University Drive • Durham, North Carolina 27707
                  Telephone: (919) 493-6099 • Fax: <919) 493-6393

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          Hypalon™
          Neoprene
          Nitrile butadiene rubber
          Polybutadiene rubber
          Polysulfide rubber
          Styrene butadiene rubber and latex

     An important component of the regulatory process is
identification of all facilities in the U.S. that are actively
producing any of the listed elastomers; these sites are termed
"existing" sources.  Currently, 35 existing plant sites have been
identified that produce one or more of the elastomers listed
above.  Because many of these produce more than one listed
elastomer on site, and because each elastomer product process
unit is defined as an affected source, 43 total existing affected
sources have been identified for this regulatory effort.

     An additional component of the regulatory process is
consideration of the potential for construction of new production
sites or for significant reconstruction of existing production
sites.  Assessment of this potential is important, because
regulations for new or reconstructed sources are likely to be
more stringent than for existing sources.  Specifically, new
sources must be controlled to a level equal to the best
controlled similar existing source, whereas existing sources must
be controlled to a level equal to a central measure of some
percent of existing sources (for example, average of the best
performing 5 sources).

EVALUATION OF NEW SOURCE POTENTIAL

     Potential for new sources was evaluated in three steps.
First, existing production capacity was compared to current
demand.  Three sources were used to obtain capacity, production,
and demand information:  Chemical Marketing Reporter1,  Chemical
Engineering News2, and the International Institute of Synthetic
Rubber Producers  (IISRP) ,3>4>5   Applicable excerpts from these
resources are included as Attachment 1.

     Table 1 presents data on production capacity and demand for
six of the nine source categories; similar data for the other
three source categories — epichlorohydrin elastomer, Hypalon™,
and polysulfide rubber — are either not available or are
considered confidential.  All three of the source categories not
presented in the table are single plant source categories;
further, the polysulfide facility is anticipated to be an area
source not subject to the MACT standard.  Therefore, the six
listed source categories were considered to be representative of
the source categories not listed in the table.  These data show
that, for 1993, domestic elastomers facilities operated at
between 43 and 86 percent capacity.  Thus, production is well
below capacity industry wide, even considering a increase in

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demand over the last couple of years.3

  Table 1.   Elastomer Production Capacity and Production in 1993
Elastomer
Butyl Rubber
Ethylene Propylene
Nitrile Rubber
Polybutadiene
Polychloroprene
Styrene Butadiene
Production Capacity in
1993, Mg/yr
350,000
378,000
133,500
656,000
163,000
1,030,000
Production in 1993,
Mg/yr
195,000
275,000
115,000
445,000
70,000
875,000
Production as a
Percent of Capacity
56
70
86
68
43
85
     In the second step, demand was projected to the year 2001,
which is five years after proposal of the standard.  The purpose
of this step was to consider whether new capacity would be needed
to meet increased demand by the year 2001.  Because the
information cited above projected demand to 1998, demand to the
year 2001 was estimated using two approaches.  In the first
approach, average annual growth was calculated for the 1994-1998
time period using information provided by IISRP, and this growth
percent was applied to each of the years 1999, 2000, and 2001.
In the second approach, a 1.5 percent annual growth factor was
applied to each subcategory or type of elastomer.  This percent
was supplied by the IISRP.5  In both approaches, although both
the capacity and projection data include Canada, only one
significant synthetic rubber producer exists in Canada (a butyl
rubber facility), and therefore, the numbers were deemed
representative of US production, capacity, and demand.5

     This second step resulted in projected demand for domestic
elastomer product that ranged from 46.2 to 94.7 percent of
domestic capacity.  Only two elastomers had projected capacity
use of over 90 percent.  Table 2 provides a summary of capacity
projections using both the approaches described above for all 6
source categories for which data are available.  Again, these
data suggest that throughout the domestic industry, production
will continue to be well below domestic capacity, regardless of
the approach used to estimate future demand.

     In the third step, industry and trade organization sources
were asked to provide input regarding whether facilities would be
constructed or reconstructed by the year 2001.  These
representatives stated that no new or reconstructed growth is

-------
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expected for three reasons.

     First, industry sources stated that no plans for
construction of new sources or reconstruction of existing sources
have been identified that would result in affected sources
subject to the new source provisions of the draft rule.
Construction of one new source that would produce a listed
elastomer is planned, but the production process of this source
is not projected to cause the emission of any organic HAP.
Specifically, in October 1994, Union Carbide announced plans to
build a ethylene propylene rubber (EPR) unit at its Seadrift,
Texas facility.6  The unit would begin operation by late 1996,
would produce EPR through a gas-phase production process, and
would not require the use of any solvents.  Solvents are the only
organic HAP expected to be emitted from the EPR process, because
although ethylene and propylene are volatile organic compounds
(VOC), they are not listed HAP.

     Second, industry sources cited excess capacity in the
international market as further evidence that no new domestic
capacity will be needed by the year 2001.  The increases in
demand over the last few years have been accommodated easily
through excess capacity both domestically and internationally.
European facilities currently operate at 50 to 55 percent of
capacity, facilities in the far east operate at 75 to 80 percent
of capacity, and Russian facilities operate at 25 percent of
capacity, for example.5  Should demand increase more than
expected, increased international production with import to the
US could fill the necessary demand without the need to construct
new or reconstruct existing facilities. Table 3 contains a
summary of the forecast by the IISRP of the five-year market for
various elastomer products.4

     Third, industry sources believe that some new products  (not
included in the categories listed under this rule) are under
development that will, if successful, reduce demand for the
listed elastomers.   For example, Exxon and Dow have initiated a
joint venture to produce a new type of elastomer that would
compete directly with existing synthetic rubber products.

REFERENCES

1.   Chemical Marketing Reporter.  Chemical Profiles.  March 28,
     1994 - Polychloroprene; April 4, 1994 - Butyl Rubber; May 9,
     1994 - Polybutadiene; May 30, 1994 - SB Rubber; June 6, 1994
     - EP Elastomers; and June 13, 1994 - Nitrile Rubber.

2.   "Facts and Figures for the Chemical Industry."  Chemical &
     Engineering News.  July 4, 1994.

3.   Worldwide Rubber Statistics - 1993.  International Institute
     of Synthetic Rubber Producers, Inc.

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4.   Facsimile, from Theismann,  B.,  International Institute of
     Synthetic Rubber Producers, Inc. to Norwood, P.,  EC/R Inc.
     July 14, 1994.  Letter attaches 1994/1998 market forecast,
     undated news release, and publication order form.

5.   Telecon. Norwood, P., EC/R Inc., with Theismann,  B.,
     International Institute of Synthetic Rubber Producers
     (IIRSP).  July 14, 1994.  Industry growth projections.

6.   Carbide to enter ethylene-propylene rubber market.  Chemical
     and Engineering News.  October 17, 1994.  p. 33.

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solution styrene-buladiene rubb
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recessions in automotive sales.
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ATTACHMENT 1

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 CHEMICAL  PROFILE   I     Report  F
POU/GHLORORRENI
PRODUCER :  v":;::
DuPont, Laplace, La..™
OuPont, Louisville, Ky..
Miles, Houston, Tex—.
                                           ^CAPACITY* "$
                                                       -
       Total,
                                             i^f£-i£>l.163
DEMAND rif • «$<•'
   1993:70,000 metric tons; 1994:70,000 metrtetpns; 1998:72,'qjpq metric; tons. (Fig-
ures represent                      .   -  .  _    .       ..._.
ric tons per year,
GROWTH
   Historical
through 1998
 .-.  •'-".:  .  -" -  -:••.-..-  ••-  -~.-*--lZ-'z, •=-.<•• :«-','-*'•««—"*••'. -~~-» "-•-
leal (1984-1993): minus 3 percent per year; future: 0 to 1 percent per year
ion   --*•;.. •     •• ••.-" , •  *•• - •."-"•-••»' -: ' 4 • - •-.•J?"'<"ii---r-"-r....  <;. •-.' - .
'aa- -..>•:-.  •-• .    ••••^-..  -- »•-- 4^.'l ----•'-.-->» "S"A>-"'-  -•--•-"•.. -
  	.-  -• " • '    .--•" •     --•••••--,-.- -'- .-.-.-	•,..-; *'-'.-•.- •   v-r-- •
 PRICE :x-I-.; •.;•  -.>'.:?1':.^ >^'- ^'^--
   Historical (1981-1994): High, $1.51 per pound, general purpose grade, f.o.b. plant;
 $1.91 per pound for"rubber, adhesive and latex grades; low, 87c. per pound, general
 purpose grade. Current: 51.51 "per pound for general purpose grade; $1.91 per pound
 for rubber, adhesive and latex grades.    '  " ^. ;f ,  ..._'   <•''-,'--''•"• .^--'   '-"•".". .'._

 USES   ..' ."     ,   "';.';"".".  .';'..','". .-.":-..:£•'.   :;   .
   Industrial (belts, hoses, flooring), 33 percent; mechanical, 30 percent;adhesives, 10
 percent; latexes, 10 percent; wire and cable, 6 percent; cellular rubber, 4 percent; mis-
 cellaneous, including consumer products, 7 percent     •       ~ •  _'       .

 STRENGTH            :.    -     ;
   Losses to competing rubbers and elastomers has slowed, as easy substitutions
 have already been made. The export market for US polychloroprene is growing, partic-
 ularly to Latin America, Asia Pacific (except Japan) and countries with controlled
 economies. Domestic sales are being helped by increasing exports of finished goods.
          -»                 _ ,        -

 WEAKNESS                     _f^V  ' :  '--':'.'(-
   Slow erosion of the markets for thermoplastic rubbers and chlorinated polyethylene
 will continue through 1995. The adhesive segment is threatened by environmental re-
 strictions on solvents, and only part of the market is likely to adopt water-based poly-
 chloroprene systems.                    r

 OUTLOOK
    Polychloroprene is an old-line elastomer passed its days of high growth. Future ap-
 plications include use in modified asphalt, where it is displacing SBR, and automotive
 engine mounts, where high under-the-hood temperatures are defeating parts made of
 natural rubber.                        --,-.-       .--
                                                                                    Bvl
MTBE PLANT PLANS DEVEL<
joint venture of Enterprise Products
Midsouth Pipeline Company, has aj
barrel-a-day methyl ten-butyl ethei
Belvieu.Tex.
  The facility has been contemplatt
Engineering and design work is und
Construction most likely will take r
into production toward the fourth q
  Elsewhere, the 15,000-barreI-a-d;
three months ahead of schedule, coi
take about half of Mitchell Energy I
Mitchell owns one-third, Enterprise
third.
  And the 15,000-barrel-a-day MT
plant of Texaco Chemical at Port Is
speaking recently in Houston, repo:
unit following acquisition of Texao

CHEMICAL COMMUTING: T
has extended the deadline for Hous
the number of vehicles being driver
that a network of certified trainers c
  Under the Employer Trip Redu<
1990, companies with more than 1C
Houston/Galveston must increase
a.m. by 25 percent or face fines. Plai
mid-1994, to go into effect by 1996,
  Under new deadlines, employer:
September 15 and those with 100-1
Dow Chemical Company and othe
study by Texas Transportation Ins
meet ETRA requirements (CMR,

BRIO SITE CULPABLE: The B
point for recycling of hazardous w;
declared a Superfund site several y
 Resource Conservation Commissii
 found downstream in portions'of C
   TNRCC says VOCs were confii
 and levels of 1,1,2 -trichloroethane
 parts per million.

 CHINA PETROCHEMICALS:
 Group Inc., Pasadena, Calif, has a
 basic petrochemicals and derivativ
 the next decade. Driving forces wi
 movement toward a free market ei

 RECYCLING AT NAN YA: N:
 Plastics, will build a $2.5 million p
 manufacturing location. When coi
 recycled material.
Wttco Opens Center
       iirMMrinon
                          and iron free dry aluminum sulfatc (alum) in
                          rh<. I !S Prior ri»>mir:il v:,v^ ir i^ n|...,«.,l t,>
                                                                     ing, developing, and implementing |
                                                                     "r,., ,.„,;,>„ ,,r,»,r.,r, ...... ,1 !;„.- „„.,,..

-------
 CHEMICAL  PROFILE  I     Report
PRODUCER
Exxon, Baton Rouge"
-~^:££&< "^'''i^t''^-^
oune! li. *•&•' *• *-•'-**••*?••••• •'  "^ :~r_ ;'?!r-- 'f-^'•'•?'—':"*--iP-~-' 109.000 "i
                                                           ,109,000 ~i
    •  - ~; _ . . ~ • . •lm>%Vi>^"fc^y^"^^^^"WJ^*^*>^iV>'*«'j»5^^*V»-^ '*VI' T"?•-.*",•"-»," »• •: •.-*.»,»•*',-?*•,.,,.„,-
    1993:195,000 metnc tons; 1994:200,000 metnotons;-1998:210.000 metric-tons^
       -- ~i w -'N"-i-vw--,-j:w,..^-«^a'r«»j>.'-?, •*-7rr:j«ai3:»i*.«.;'A-i«.>i-•:"'   '-?--. .'--••  - ..-•»,.—• ">-
 USES     -^::-^^-•^i3^^^^?^-^^.:^,^  •-.;*••;,':;<..
             -• .  :  ' .•  •-••--;• -<--^T.-.'f.;«-.'.  -Y» *"•»•* :!i>r.r«5w*>..«-.5 >*^U •^••'* ' •.-:. , •>'...-
    Tires, tubes and related products/80 percent;':automotive products, 8 percent; ad-.
 hesives, caulks and sealants, 6 percent;;pharmaceutical uses, 3 "percent; other, 3 per-
 cent.
 <*'i r^^m •^^•••i • -  --•^"•--.  i'-~- ' .  "-V.'v-- , ~-*i- r-  ;' _~^"-"   .  ".'.. '   -- -
 STRENGTM  ,.;.-•-:•; •->•- -7 i. ..V" vc >.-.->-: - ..-^-i-. -"V^-.-.- -••-;•->:-«--.   •-.
       -   .       . -:-  .-- -- -   .-".^-•..--/v..;.;- ,. - .v.. '':.,--•" ....,, ...   .--•-..  .
    Butyl rubber is a tried-and-true product with a large, established demand in tires and .
 automotive goods. Production and pricing are stable, and demand should grow aslhe
 economy picks up. -           : -; -"*•£ .;-/. ~~'- ^^f.x5';^~;^:- ' r"I  '  "•'. ''.  ;":
 WEAKNESS,;-,  - .:\----:^r1r.^^;?l%^':-.
    Butyl rubber is ah extremely mature market that grew very slightly in the 1980s and
 should continue to grow at less than GDP in the 1990s. US butyl rubber production
 peaked at 194,000  metric tons in'1979, and it has since fallen by'over one-quarter. Im-
 ported tires remain a threat to domestic rubber consumption, and exports of butyl rub-
 ber could fall after 1995, when Sovbutital opens a 90,000-metric-ton facility in Siberia.

 OUTLOOK                        :  ;
    Overall growth  for butyl rubber should remain sluggish, but demand for tire rubber
 should be healthier than it was in the past decade. Small uses of butyl rubber remain
 weak, but adhesives and sealants are promising markets.   .
                                                                                                Bv
                                   MONT BELVIEU LPG UPDAT
                                   should reach 540,000 barrels a day I
                                   ago. And as the raw NGL pipeline «,
                                   fracrionator feeds could be availabk
                                   problems.
                                     C. R. Eldred, manager of Houston
                                   division of Chevron USA Inc.'told
                                   Woodlands March 24 that the Mon
                                   storage/processing area in the \vorl.
                                     Cost of environmental rcgularior
                                   import capability; segregated stora;.
                                     Mont Belvieu facilities could inc
                                   next three to five years to comply \<
                                   executive. One immediate problen
                                   has been disposed of in caprock mu
                                   process which could protract 400,0
                                     Excluding ethane rejection, \vhk
                                   he predicts that fracrionators will o
                                   This means potential raw NGL su-
                                     LPG imports will rise and fall, h
                                    handling capacity on that basis. As
                                    material, fluoride contamination h.
                                    by defluorinarion and segregation .
                                    butanes is also "an ever-increasing
                                    fracrionators, reducing front-end fi
                                    monitored more closely and these

                                    MTBE FORECAST: S. Craig \V
                                    world methyl ten-butyl ether (M'l
                                    1993 to 25 million tons in 199S. \V
                                    million tons in 1993 to 11.7 millior
                                      The US butane demand picture
                                    dehydrogenarion consumption of
                                    and 83,000 barrels in 1998, while t
                                    barrels in  1990 to 130,000 barrels i
                                      Things to watch for. some non-
                                    pressure (RVP) standards rather ti
                                    with the Clean  Air Act. Further, h
                                    of a factor than earlier had been th
                                    of MTBE requirements by 2000.

                                    LPG  WORLD HIGHLIGHTS:
                                    director, told the conclave that de-
                                    growth will surpass base demand >.
                                    after 1996.He foresees an increasii
                                    Also, increased world supplies am
                                     pressures on the world butane ma

                                     STERLING INJECTION WEI
                                     proposes to reissue an exemption
                                     Solid Waste Amendments (HS\V
                                     Act (RCRA) for a hazardous wasu
                                     St. South in Texas Citv.
                                                                            BRIEFS
 EM Offers USP Grades
tor of Luxate aliphatic diisocvanates in the   Conn. The imnort/exoort comn.i

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I
CHEMICAL  PROFILE   I    Report
          Goodyear, Beaumont, Tex..
          ..  	-v. ••/.• .-»*• <« .'•!*.«•• ••*. / :-«Jfl
          •Metric tons per year,' net rubber basis, solution polymerize^ L  .
          ber. Firestone wasjjcquired by.BrldgestoneCpi^i^jo'n'qf Japanlh^QSB^The^
          company produces small quantttiesibf hlgiwinyl pblytmtadiehe at Lake Charles,'::
          La. Polysar was bought by BayerAG In 1990fandj^isjmwttiB>olysar Rubbervdi-:
          vision of Miles Inc. Profile last published 4/IJ^i^is^vision,,_SI9IS4l.^^^^^;

          DEMAND -",;
             1993: 445,000 metric tons; 1994:-455,000 metric tons; 1998:480,000"metri_cjons. j
          (Figures represent US'consumptionrrThey iriciude imports of 50,000 to 90,000 metric:
          tons per year, but exclude'exports,.which surp"assed;l25,00p^_metric^tons m^992^^. '
RRnWTH  -  "•::•'" ^:'-' •"Tw.-":c-^ u -^: **>*-• _-~rs -— ••=  -•••»---
unL/vv I n  ., «, .^ •'-" •cr^.'slf-Jw*. "».-"~.i>   5c.M.~t,icv.^sr?s^t--s_jsicrta!is.-^s«fS'
   Historical (1984-1993): 1 to 2~percent per yean future: 1 to 2 percent peTyear
  ough 1998. •   — -.-.-	.,ii.v..i=Jl_^i .•£$£%£."3,'V"-   ^"^ i^'"~ •J~;5""?3'*~ ^p^Jf":
          through
                                                      ..
              Historical (1981-1994): High, 82c. per pound, clear rubber grade, t.l. or c.l.,.f.o.b.
           works; low, 43c. per pound, same' basis. Current: 67.75 to 80c. per pound, list, clear
           rubber grade; 67.75c. to 82c. per pound, list, clear plastic grade, same basis. Selling
           prices follow butadiene. Rubber grade selling prices range from 45c. to 55c. per pound;'
           plastic grade, 53c. to 62c. per pound.       z&:-l/.&Z'.--g-.. "=.  .  ~. -. ' i":£;~* :\

           USES           ,;,:' -•;:-.-;?-;.- '.        ^;-A:'- --' ,.,    :-.  ;^^v
              Tires and treads for automobiles, trucks and buses, 75 percent; high impact resin
           modification, 22 percent; industrial products (conveyor belts, hoses, seals and gaskets)
           and other, 3 percent  ".'-;i -:_            ~-:^.* *-- "•  ,  =•"   •':  -   ;..«.?,>*--.

           STRENGTH                  :     ;,- -~^.';~--.>;-     •:^-~^'-\
              Use in the impact modification of styrenics is growing, and the tire retread market,.
           which uses polybutadiene elastomers to  improve tread wear, is enjoying 5 to 6 percent
           annual growth.  Exports are very strong and have grown from less than 25,000 metric
           tons in 1986 to  oveM 25,000 metric tons  in 1992.        ->^  :r"          .;..."':

           WEAKNESS     -   ";".''.'•           ~      :           - - -- •-••• '
              Polybutadiene is.a mature product that has averaged only 1  to 2 percent annual
           growth since the mid-1970s. Natural and solution SBR have taken some business from
           polybutadiene.  The tire industry remains vulnerable to price cutting, overcapacity and
           periodic recessions in automotive sales.

           OUTLOOK          "                                           ~
              Average growth remains a sluggish 1 to 2 percent annual rate, but it is highly spo-
           radic, and demand can rise or fall substantially in any given year. Exports have been a
           windfall during the past eight years, but most of these exports are to the producers'
           overseas divisions.
                                                                         MARAVEN PROJECT CO>
                                                                         of Maraven, a branch of Petrok
                                                                         produce 234,000 barrels daily o
                                                                         27,000 barrels of high-sulfur re
                                                                           In addition to this expansion
                                                                         (MTBE), tert-amyl methyl eth
                                                                         under construction. An addidr
                                                                         communications system for Vc
                                                                           M. W. Kellogg of Houston, (
                                                                         being Bechtel Corporation (H«
                                                                         NJ.—is operating a worldwidt
                                                                         together.
                                                                           In addition, Kellogg is suppl
                                                                         a program management team \
                                                                         Maraven.
                                                                           Partnering with AT&T and
                                                                         F-W and data is exchanged vi.
                                                                         communications satellite, to ar
                                                                         system includes electronic ma:
                                                                         network and video conference
                                                                           John Menzies, Kellogg vice-
                                                                         speaking from Caracas to Hou
                                                                         costs over the life of the projec
                                                                         expenses and salaries, the hool
                                                                            He estimates that were it no
                                                                         whereby funds for the Marave
                                                                         communications network coui
                                                                         owing to increased efficiencies
                                                                            Allan V. Dyke, director of \\
                                                                         Vennet experience will give h
                                                                          we're in a very strong position
                                                                          the scale of the Maraven proie
                                                                          expansion program, the syster

                                                                          TNRCC-RRC SPAT, CON
                                                                          Commission last week was sor
                                                                          news release charging TNRO
                                                                          "hurting the state's fledgling a!
                                                                          use of standards adopted bv C
                                                                            Bill Campbell, assistant exe.
                                                                          Protection Agency decisions a
                                                                          page, TNRCC hopes to issue
                                                                          to initiate a solution to altema
                                                                            Until the recent rules chani:
                                                                          Campbell says, TNRCC thou
                                                                          saving Texas taxpayers the e.\
                                                                          procedures.

                                                                          HOWELL CORPORATIO
                                                                           earnings of $2.5 million last vc
                                                                           declined to $411  million from
                                                                           & Chemicals unit netted S&5,(
                                                                           from the $1.7 million loss on r<
                                                                       i-4H-%ri
                                                                                      v-»l
                                                                  tJI*rTiL!tij^7!*i
           Sun Chemical's New Site            JSQ 9001. The certification applies to the  ings within its performance ad.
           Sun Chemical Corporation. Fort Lee. N.I..   ninniifncrurL- of ranrnltim :iiul niobium rmwl-  m>« nnir Tin- lir^r-in,,-,. ..v.,™

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I
         CHEMICAL PROFILE  I    Report
         SB RUBBER
                                   i^/s----'
                                                  May30; 1994;
                                                           CAPACITY*
Ameripol-Synpol, (E) Port Neches, Tex..:......".
Bridgestone/Firestone, (S) Lake Charles, La.
Copolymer, (E) Baton Rouge, La.
General Tire, (E) Odessa, Tex..^.
Goodyear, (S) Beaumont, Tex. ™:,
Goodyear, (E) Houston, Tex.'	
    ,  Total.....
                                                              .».1 50,000
                                                                .95,000
                                                               :._20,ooo
                                                               i.305,000
                                                          ~.~:.1,030,bOO
               .Emulsion-polymerized solid rubber (E)........

               Solution-polymerized solid rubber (S)
                                               .' :;^-^86oJrJoo
'Metric tons per year of emulsion (E) and solution (S) polymerized solid styrene
butadiene rubber (SBR). Capacity figures are for net dry rubber, including ex-
tended oils. Ameripol's capacity includes a small amount of emulsion-polymer-
ized material. American Synthetic Rubber, Louisville, Ky., is wholly owned by
Michelin et Cie and produces some solution-polymerized SBR for captive use.
Bridgestone Corporation of Japan acquired Firestone in 1988. DSM of the Nether-
lands acquired Copolymer in 1989. Profile last published 5/27/91; this revision,
5/30/94.      ..,.-.-       "•-.-    \  ;   -          .  .-^.-.~.-..

DEMAND     ,-..-.-:             . ; .;-.. ...         '-  X-vU-
   1993: 875,000 metric tons; 1994: 875,000 metric tons; 1998: 910,000 metric tons.
(Includes exports of 150,000 to 225,000 metric tons per year, but not imports of 60,000
to 70,000 metric tons.)                       .     "   . "•  --.:.-   "

GROWTH                          .               ;  .;/_'
    Historical (1984-1993): minus 1 to 0 percent per year; future: 0 to 1 percent per
year through 1998.

PRICE
    Historical (1981-1994): High. 64c. per pound, dry SBR type 1712, oil extended,
f.o.b. works; low, 42c. per pound, same basis. Current:  64c. per pound, list, same ba-
sis. Market price is roughly 40c. to 42c. per pound.

 USES
    Tires and tire-related products including tread rubber, 80 percent; mechanical
 goods, 11 percent; automotive, 6 percent; other, including floor tile and shoe soles, 3
 percent.

 STRENGTH
    Conversion of automobile tires to radial design has peaked, and exports of SBR are
 strong. The domestic auto industry  is healthy, and demand for SBR is growing again.

 WEAKNESS"
    SBR is highly dependent on tire manufacturing for the auto industry. The product
 suffered a huge drop in demand between 1977 and 1985, and it remains vulnerable to
 downturns in the automotive industry.

 OUTLOOK
    SBR consumption is flat and shows little chance of real, long-term improvement.
 However, the product is finally growing again after a sharp decline between 1977 and
 1985, and a modest drop from 1985 through 1990. The  increasing use of performance
 tires could help SBR, and the industry is gradually shifting from emulsion polymerization
 to solution polymer technology.
                                                                                         Bv
EXXON BENICIA UPGRADE:
July at its Benicia, Calif., refinery 01
gasoline requirements of California
benzene, vapor pressure, olefins am
will cost an additional 12 to 17 cent
  Ralph M. Parsons Company, Pas
construction sen-ices. The project i
addition of hydrotreating, fracriona
  The venture also encompasses a •
(MTB.E) unit, to be built by Pasadc
Completion of the entire project is (
in California for cleaner-burning ga

MTBE UNIT OF BEF OPENS:'
plant of Belvieu Environmental Put
Belvieu, an estimated three months
Company, Enterprise Products Cor
Company.
  The three also will provide equal
 undergoing start-up. Sun will buy a
 and marketing operations. Enterpri.-

 DESULFURIZATION PILOT F
 the nation's first continuous pilot pi:
 remove sulfur from petroleum feed.1
 offered by Energy BioSystcms Cory
 desulfurizarion of petroleum feeds u
 of Gas Technology, Chicago (CMR
  Petrolite Corporation, St. Louis, r
 the facility, which will be built by .V
 research facilities in SL Louis. Depe
 commercial biochemical desulfuriz:

 MOTCO, BRIO DEVELOPME>
 Con Inc for installation of a slum' v
 block migration of underground cor
 method will be employed at the troi
   The Brio group, comprised of ma
 (PRPs) as Motco—a who's who oft
 suspended cleanup efforrs and dcclj
 plan which could involve isolation <
 incineration, which had been favore

 STRESS ON C-5 SUPPLY: US d<
 annually from 1985 to 1992, when it
 polyisoprene for tires and the produ
   But according to a study by Dc\V
 piperylene and other C-5 based chei
  for isoamylcne-bascd tert-amyl met

  ROIIM AND HAAS TRANSAC
 Coast Waste Disposal Authority nt t
  be bought up by Rohm and I laas thi
                                                 BUSINESS  BRIEFS
         Zeneca Unit Changes Name      •  to markct an[j SL.n \K i;ni. «r••niv.,,	i ..;i

-------
 CHEMICAL  PROFILE  I    Report
PRODUCER
Copolymer, Addis, La.
Du Pont, Beaumont, Tex..'.™
Exxon, Baton Rouge, La; "rTnn<
                                                                                           B
•Metric tons per year p^ethylene-prppylene (EPM)i and terpplyrner (EPDM) elas-
tomers. Capacity is based on"net rubbeTand doesjncrt IncTude'fiHere, sjuch as car-
bon black. EPDM accounte for 80 to 85 percent^Current p'fo^luction. DSM ac-
quired Copolymer in 1989, and BayerAG purcnased| Nova Corporation's Poiysar
rubber division in 1990. Union CarWdeJbperJdJa^emiworks facility in South
Charleston, W.Va., in 1992. Profllelast'published^^rs/gi; this revision, 6/6/94.;_
           -       ,--•    •     •. i f.-.jf •»*w*J6fiE;H^'ti(W*v'tVv»**~^T'~""'O-*•*-'• " -"^ "^
f*r~m m A » >*K         - • -- — ^    *-»Jir •--'  •' - ^3&&Z?' **"^I -1."'1?"'**-*•"'. "^^«". TiX"*7 -* s_ - - '
DEMAND     '   -••^•::"-rf!W?>r;.'>-r '^^^J^v^^:^-:;^^-.;----':.^:'.
 "  1993: 265,000 metric tons; 1994:; 27p,OOOjTietncJoris; 1998: 300,000 metric tons.
(Includes exports, which have doubled tpJBO.OOOJmefnc tons over thepast 10 years, but
not imports of 10,000 to 15,000 metric tons peFyeak)fw:l~--* -• :»V V . -  •     ~

GROWTH   ••    ''; --ir^lte^ ~*^^  r": "-•'•  ,;':  •.".".
   Historical (1984-1993): 3 to 4 percent per_year; future: 2 to 3 percent per year
through 1998.    . J..\/." "Jll./Zl^t^J'X~r^ T>;' :   .'•"•'""""   "  '
 -  Historical (1981-1994): High, $1:38 per pound, EPDM general purpose terpoly-
 mer, standard grade, bulk, f.o.b. works;.low, 78c. per pound, same basis. Current:
 $1.38 per pound, general purpose, standard grade. List prices vary considerably, de-
 pending on grade and properties.  '•"vT?.-   '."0%'"-':'  '•"'•-'".

 USES                    ;j|
    Automotive parts, 40 percent; building and construction, 18 percent; oil additives, 14
 percent; industrial uses, 13 percent; wire and cable, 8 percent; miscellaneous, 7 per-
 cent. -              •- -,,.   -;. ',~~     '    '•

 STRENGTH                         ^~
    Exports of EP elastomers have doubled over the past decade, and a healthy US
 auto industry promises solid growth over the next few years. Building and construction
 uses are healthy, particularly single-ply roofing, and wire and cable insulation is also
 growing modestly.

 WEAKNESS
    Although the auto and construction industries are presently healthy, they are vul-
 nerable to periodic downturns. Polypropylene poses tough competition for EP elas-
 tomers, and most end uses offer only modest to flat growth.

 OUTLOOK
    EP elastomers grew faster than GDP during the 1980s. Their growth could taper off
 in the 1990s, but the automotive and construction industries are presently healthy and
 producers are gradually raising their capacities.
                                  MITSUBISHI METALLOCEI'
                                  market for extrusion coating heat
                                  which 40 percent goes to light-du
                                  40 percent is used in industrial an
                                   Mitsubishi Petrochemical Corr
                                  with Kernel 57 L, a mettllocene-i
                                  speaking recently before MetCon
                                  processability of the resin—a dra-
                                  making the materials more attraci

                                  METALLOCENE CATALYS
                                  MetCon meeting by Dr. Norman
                                  Argonne, III He concludes that o
                                  million capital investment is requ
                                  heterogenized catalyst system wi
                                  cyclopentadienyl zirconocene di(
                                  zirconocene basis).
                                    He reckons the metallocene sy
                                  given a trimethylaluminum price
                                  finished polymer would be 3.9 ce
                                  properties will support good dem

                                  HOUSTON-GALVESTON E
                                  vehicle emissions testing progran
                                  Harris (City of Houston), Galves
                                  The region is deemed a "severe r
                                    Texas Natural Resource Cons-
                                  program, called Texas Air Care,
                                  vehicles to be tested ever)' other
                                  reduction can be achieved only tl
                                  industry already has reduced its i

                                  PERMITTING: Environmenta
                                  Pollutant Discharge Elimination
                                  million-pound-a-year polyprop\
                                  have been formulated for plants <
                                  Biotech Corporation in Houston
                                     Permits have been formulated
                                  the Mobil Chemical polyethylen
                                  Gulf Coast Waste Disposal Auth
                                   Hampshire Chemical Corporatk

                                   SETPOINT DOINGS: Serpoii
                                   processing software house, says r
                                   established an office in Leiden, cf
                                   president. Mark L. Darby has bet
                                   director of software products anc
                                   industry sales.

                                   ALUMINA PLANT GETS IS
                                   alumina refinery of Kaiser Alum
                                   quality certification, covering m:
                                   alumina and alumina trihvdratc.
                                         BUSINESS  BRIEFS
 Norton Opens Tokyo Office
 Norton Performance Plastics Corporation,
Drug Administration  approval lor  its
polvpropylenc' him resin. I..\.von Chemical
Milford, Conn. The 14-acre site, e?
he completed hv Novfmhi-r will m

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]

]
        CHEMICAL PROFILE  I    Report  F
NITRlOElRJlBBER
                                                                 V-sV
                                                                13,1994 _
PRODUCER ^V;vU^^l^?ju;-'?
DSM, (S) Copolyrher, Baton Rouge, La.~7...<:..~
Goodyear, (S) Houston, Tex. :.:1:.:^,.LV™-——':,
Goodrich, (L) Akron, Ohio -^ZZZZZZZZ.
W.R. Grace, (L) Owensboroi I
Polysar (Miles), (H) Orange, TexV,
Polysar (Bayer); (S) Sarhla, Ontf Canada ...^
Uniroyal,(S)
Zeon, (H) Houston, Tex.
Zeon, (S) Louisville,
       Total"
                                                              CAPACITY*
                                                             l.....Hi5,bbo
                                                             ..—:..:..2B,000
                                                                   :.9,ioo
                                                                   ..3,000
  :.—:.:..20,ooo
         0,000
,........._-..;.:1,500
-"•"  '"l~5,300
                                                                         .-
                                                                  l33,50a
                                                                   ""   *
•Metric tons per year of dry "rubber', latex and hydrogenated capacity. (S>—solid ~
rubber; (L)—latex; (H)—hydrogenated. Solid and latex capacity figures are flexi-•
ble, as some production units rah swing to make SB and PVC blends. BASF no *
longer produces at Sarnia, Ontj'br Chattanooga, Tenn. Polysar was acquired by
Bayer AG in May 1990; Ms US operations are run by Bayer's US subsidiary, Miles
Inc. Profile last published 5/20/91; this revision, 6/13/94. * '•-_  • ~   » :. xr;i;/   ,

DEMAND   v:V:.;. . v>- ^.^:. •;.-. *? yc*>-_ "• .'• "-v^."" • • :S"^V ---.
   1993: 115,000 metric tons; 1994:117,000 metric tons; 1998: 121,000 "metric tons.
(Consumption estimates are for North America and are based on forecasts by Interna-
tional Institute of Synthetic Rubber Producers. Data includes all types of nitrile rubber.)

GROWTH  "Sw-  v ,>:-r>iv "•      _	-       ;  ;_..;  _;
   Historical (1984-1993): 0 to 1 percent; future: 1 to 2 percent per year through
1998.     . -'<^: i'-J;::^^]^.Vr;"-    -•  -'•'"::••"•"•'-•  •••'  -:'-    J.-.J-< .••--=•

PRICE •-.  --;*-. -: vf ^^ffe-   ."-"-.' •••'''- •••••• •-.'--   --:'-.  ->
   Historical (1981-1994): High, $1.60 per pound, medium to high acrylonitrile con-
tent, bulk, works; low, 85c. per pound,  same basis. Current: (list) $1.40 per pound,
medium-acrylonitrile; $1.55 per pound, high-acrylonitrile.            -  - _-\v>^.;  •

 USES   '.   ~~-    - -:;v:-^:      ^-./.-   ~    \    • '• i^t
   Hose, belting and cable, 28 percent; O-rings and seals, 20 percent; latex, 15 per-
 cent; molded and extruded products, 15 percent; adhesives and sealants, 10 percent;
 sponges, 5percent;footwear, 2percent; other, 5percent.    -	~:*~ :?'".

 STRENGTH          :-:_' "^       ~~~   ~~          . .\-'.: •;•-
    A resurgent auto market is boosting nitrile rubber, and the product should grow, al-
 beit slowly, for the rest of the decade. High-temperature  NR is finding new uses in high-
 tech auto applications,       -r .         .  .   --    .   .   1      '-->';'".

 WEAKNESS        .  r -:                               •{
    Nitrile rubber is growing at less than GDP and is vulnerable to downturns in the au-
 tomotive market, which accounts for roughly half of demand. Fierce competition in rub-
 ber hose and belting has kept pricing soft in those  areas in recent years.

 OUTLOOK                                   ~              ~
    An upturn in the auto market is brightening nitrile rubber's outlook, though the prod-
 uct is mature and has shown almost no growth for two decades. IISRP rates 1993 North
 American consumption of solid nitrile rubber at 78,500 metric tons and expects it to
 reach nearly 84,000 metric tons by 1998. The institute places 1993 nitrile latex con-
 sumption at 36,300 metric tons and predicts it will  reach 38,300 metric tons by 1998.
                                                                                                      BvDi
                                                                      NGL WEAK, MITCHELL EARN!
                                                                      Development Corporation net eamm
                                                                      million in Qj last fiscal year due to \\\
                                                                      both revenues and volumes, and lowc
                                                                        Operating earnings for the quarter *
                                                                      from $25.2 million in last year's like p>
                                                                      Ql 1994. Processing volumes fell by r
                                                                      43,200 barrels per day because some r
                                                                      temporarily shut down.
                                                                        "The good news," says Mitchell, is
                                                                      liquids, have rebounded by about S5 .
                                                                      industry, which buys three-fourths 01
                                                                      than-three-year slump, and new dem
                                                                      planes—one that came on line this sp

                                                                      GCF FIRE EFFECT: Mitchell's Qj
                                                                      charge for insurance deducriblcs reb'
                                                                      of the Gulf Coast Fracuonators NGL
                                                                        Mitchell owns 38.75 percent of GC
                                                                      NGL Holding Inc. (38.75 percent! ar
                                                                      The unit is due back on line in Aueu
                                                                      capacity to 120,000 barrels daily

                                                                       FORMOSA OLEFINS ON LINE.
                                                                       Point Comfort is now producing mar
                                                                       propylene. The firm has been nvcaki
                                                                       brought up to snuff toward the end o
                                                                       Mounger's start-up prediction (CMI
                                                                       yearofethylene and 500 million pou

                                                                       HUNTER TO FIGHT ON. A Te
                                                                       Resource Conservation Commissior
                                                                       by Hunter Industrial Facilities Inc.. t
                                                                       near Dayton was upheld in March ir
                                                                       appeal by Hunter.
                                                                         The firm reportedly will appeal .v.
                                                                       next week or so. Hunter has sought t
                                                                       dome.
                                                                         The plan has been controversial tr
                                                                       project was safe, but TNRCC chairr
                                                                       Peggy Garner ruled that Hunter hat
                                                                       the salt dome, failed to provide in ac
                                                                       urgent need for the facility.

                                                                       RISK MANAGEMENT FORML
                                                                       chemical facilities, devised by E.I. dt
                                                                       the Texas Chemical Council/Assoc
                                                                       safety seminar in Galvcston.
                                                                         The DuPont method invol\ e? ton
                                                                       leadership and commitment, implen
                                                                       process safer}1 and risk management
                                                                         The presentation characterized tl-
                                                                       owner-operators, employees, the pu
        Dow's New Order Policy
        IV... I "I	I  f	
                                   Paulo, has obtained ISO 9002 certification.  Construccion S dc IIL de CY, wi
                                   I}....]	 I .1 		 _-	I - . -l	1 --'    	:-         '

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                     ::...L ii.r.:               i •  1:. rUd j'j. :•.          -",.1  .Jj
I
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•


I
                                                           International Institute of
                                                 Synthetic Rubber Producers, Inc
      Brttt Thelsmann
_  !  information and Systems Director
       O ct> d> c> c>   Mr> phii Norwood

,                  ECR                                      Fax
™     Fax:          9194936393
I
    I
    II
    |   Message:


    II                Attached Is our 1 994/1998 forecast and our publication order form, Should

    !                you have any additional questions we look forward to assisting you further.
    i

I                  Best Regards,
                     Br/07010.04
     j                   2077 South Gessner Road - Suite 133 - Houston, Texas 77063-1 123

         Tel. US 7 13.783. 75 11 • Fax US 7 13.783.7253 • Data Fax US 713 783 1703 • Internet IBThetsrrxinn@ATTMAJLcom

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                INTERNATIONAL INSTITUTE OF SYNTHETIC  "URBER PROI L'CFRS  IMC
                2077 South Gas-sner Rnad • Si HB 133 • Houston. Texas ''VOT3-1123 • (/1 •"'• 783 «VM • t ax (713. 'nn-725;
                                                                      For Further Information
                                                                    Contact B. D. Theismann
                                                                                (PR 94.04)
        For Immediate Release
,<££.  NEWS  RELEASE
          North American Synthetic Rubber Consumption Increased by 4.0% in 1993
        	to 2.8 Million Metric Tons — Future to Remain Stable	

        HOUSTON, TEXAS USA, 7February 1994—Synthetic Rubber (SR) consumption increased by 4%
        in 1993 to a total of 2,784 thousand metric tons, reaching a high water mark in total SR consumption in
        North America for the second year in a row, according to the International Institute of Synthetic Rubber
        Producers (TISRP).
               "This rate of growth out-paced our predicted growth rate of 2.9% for 1993," said Conrad
        Jankowski, managing director of the HSRP. Jankowski added, "The SR industry also outpaced GDP
        growth in North America, attributable to stronger dian expected new car sales and stronger than
        expected results from non-tire, non-automotive elastomers. Record levels of consumption were
        attained for Poh/butadiene rubber (BR) at 484 thousand metric tons, Styrene-butadiene rubber (SBR)
         latex at 78 thousand metric tons, Carboxylated SBR latex rubber at 606 thousand metric tons, and
         Acrylonhrile butadiene rubber (NBR) at 78.5 thousand metric ions."
               "We expect 1994 to more closely reflect traditional rates of growth for SR," said Jankowski.
         SR consumption in North America is expected to increase by 2.5% in 1994 to reach 2,853 thousand
         metric tons.
               In 1993, SR usage in tires was 45.3% of total SR consumption. Excluding Carboxylated  latex,
         tire usage represented 58.3% of SR consumption.
               SBR latex exhibited the highest rate of growth at 10.7%, followed by Carboxylated lalex  at
         9.4%.  Ethylene Propylene Rubber (EPR) increased by 3.8%  SBR, both solid emulsion and solid
         solution polymers, increased by 2.5%, while NBR and BR increased by 1.7% and 1.0% respectively.
               For 1994, Carboxylated SBR latex is expected to continue a high level of growth at 5.8%.
         EPR is expected to lead the more traditional SR elastomers at 3% growth, while Polychloroprene
         rubber (CR), and NBR are expected to increase by 1.4%, and 1.3% respectivery. SBR latex is
                                              —more-

-------
                                                                    . . L  . J'.'
Press Release                                                         Pa9* 2
IISRP North American SR Consumption Forecast
1994/1998
expected to increase by 2.7%. Among tire elastomers SBR is expected to increase by 1.4%, BR by
2.0%, Butyl CUR) by 1.3%, while Polyisoprene rubber (IR) consumption is expected to decrease by as
much as 8% in 1994. With the exception of CR, moat SR elastomers are expected to continue the
same pace of growth over the five-yeor period 1994/1998. CR is expected to slow to an annual
average growth rate of 0.6%. The IISRP consumption forecast projects that in 1998 SR consumption
in North America will be 3,176 thousand metric tons For an overall annual growth rate of 2.7%
       Thermoplastic Elastomers (TPE's) ore expected to continue a 7% annual rote of growth
through the balance of fee 1990's.
        Consumption of natural rubber (NR) reflected an increase of 2.3% in 1993 with consumption
of 1,043 thousand metric tons. Over the five-year period NR consumption is projected to average
 1.3% annually.
        The IISRP North American consumption forecast is prepared annually be the Institute's
 Americas section statistical committee.  The committee is made up of representatives from the major
 SR producer in North and South America. HSR? member companies participating in the forecast are
 Tolysar Rubber Corp.; DuPonl; Ameripol Synpol Corp.; Goodyear Tire & Rubber Co.; Uniroyal
 Chemical Co.; American Synthetic Rubber Corp., Firestone Synthetic Rubber & Latex Co.; General
 Tire, Inc.; Advanced Elastomer Systems; DSM Coporymer, Inc.; Zeon Chemicals USA, Inc.; EniChem
 Flastnmer Americas Jnc.; and Shell Chemical Co.
        The HSRP is an international not-for-profit trade association with about 50 corporate members
 who produce 90% of the world supply of synthetic rubber  Its members are domiciled in 21 countries.
 Incorporated in 1960 and headquartered in Houston, Texas USA, the Institute also supports secretariat
 offices in London and Tokyo.
                                             (30)

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c/R Incorporated
                                TELEPHONE CALL SUMMARY

      PROJECT NO.t       ESD-225                             CALL INCOMING  I
                                                                 OUTGOING 	
      EC/R STAFF!   Phil  Norwood

      DATEI  July 14,  1994

      CONVERSATION WITHi  Britt Theismann

            TITLE:   Information and Systems Director

            COMPANY: International Institute of Synthetic Rubber Producers  (IISRP)

            ADDRESS:  Houston, TX

            TELEPHONE NO.:  (713) 783-7253

      SUMMARY:  Mr. Theisman, in his role as Information and Systems Director,  is
      responsible for all industry growth projections for the IISRP.  He  called
      me in response to my call yesterday to Mr. Conrad Jankowski of the  IISRP
      inquiring about demand estimates for 2001.

           Mr. Theisman indicated that IISRP projects synthetic rubber  demand for
      5 years into the future.  1998 estimates are currently available, and 1999
      projections will be published in August.  He said that these projections
      include Canada, but there is only one significant synthetic rubber  producer
      in Canada  (a Butyl Rubber facility).

           I asked Mr. Theisman about a possible approximation that we  could use
      to estimate the 2001 demand.  He suggested assuming  a 1.5% annual growth
      rate in demand.  I asked whether it might be better  to calculate  the
      projected  annual percentage growth between 1994 and  1998, then  apply this
      annual percentage until 2001.  He said that the Institute clearly feels it
      would be better to assume a 1.5% annual - increase.  This  is because  the
      industry underwent a large decline several years ago, and has had a large
      increase in the last couple of years.  They believe  it will now level out.

           I explained that  we were trying  to predict whether  any new synthetic
      rubber  facilities will be built before  2001.   He said that he  felt strongly
      that no new  facilities would be built,  nor would existing  capacity be
      expanded,  in the U.S.  in the next  10  years.  He  gave several  reasons for
      this statement, including:

       •  The  demand is well below  capacity  for most types of synthetic rubber,
         even with  the recent increases  in  demand

       •  Synthetic  rubber production has  become  a  global  market,  and there is also
         unutilized capacity  in  other areas  of the world.   Examples  included
         Europe,  which is producing 50-55%  of  capacity,  and the Far East and
         Russia,  which are producing 75-80%  and  25% of  capacity,  respectively.

       •  Exxon and  Dow have  initiated a joint  venture to produce a new type of
         elastomer.   While this  new elastomer  is not  a synthetic rubber,  it will
         compete directly with existing synthetic  rubber products.

            Mr.  Theisman said that he would send me a recent press release with
       the 1998 demand projections,  as well as a list of related publications
       available from the IISRP.
                         University Tower, Suite 404  •  3101 Petty Road
                                 Durham, North Carolina 27707
                                       (919) 493-6099

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I
I    E /R Incorporated.
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                                  Environmental Consulting and Research
MEMORANDUM

Date:     May 10, 1995

Subject:  Estimated Regulatory Alternative Impacts for Elastomer
          Production Facilities (Polymers and Resins I)

From:     Phil Norwood,  EC/R\

To:       Leslie Evans,  EPA/OAQPS/ESD/OCG


     The purpose of this memorandum is to present the estimated
impacts of the hazardous air pollutant (HAP)  control options for
existing sources that  are associated with the regulatory
alternative(s) considered by the Environmental Protection Agency
(EPA) for the proposed elastomer production rule.  This
memorandum  is organized in five sections.  The first section
briefly describes the  regulatory alternative for which impacts
were developed.  The second presents primary environmental
impacts, and is  followed by sections on secondary environmental
impacts  (air pollution,  water pollution,  and solid and hazardous
waste impacts),  energy impacts, and costs.

     As discussed in a separate memorandum,1  no new sources that
would be subject to the proposed rule are expected to be
constructed or reconstructed before 2001.  Therefore, no impacts
were estimated for new sources.
 DESCRIPTION OF THE REGULATORY ALTERNATIVE(S)

      The proposed regulation for elastomer producers will address
 HAP emissions from five general emission source types:
 (1)  storage,  (2)  process "front-end," (3) process "back-end,"
 (4)  equipment leaks, and (5) wastewater.  The process  "front-end"
 includes prepolymerization, reaction, stripping,'and material
 recovery operations, while the "back-end" includes drying and
 finishing operations.

      The regulatory alternatives considered for subcategories  are
 summarized in Table 1.  Unique facility-specific circumstances
 led to the consideration of an exemption for certain process
 vents in the single facility subcategories of butyl and halobutyl
 rubber.  Throughout this memorandum, reference will be made to
 the regulatory alternative, although it is recognized  that the
 EPA considered two separate alternatives.  Details of  the
 determination of the maximum achievable control technology
 "floors," and the establishment of the regulatory alternative,
 are provided in a separate memorandum.2  The following  briefly
 summarizes the applicability and control requirements  of the
 regulatory alternative are summarized below.
               3721-D University Drive • Durham, North Carolina 27707
                 Telephone: (919) 493-6099 • Fax: (919) 493-6393  .

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     The storage tank, wastewater, and equipment leak provisions
all are identical to those in the Hazardous Organic NESHAP (HON).
For storage tanks, required control measures range from floating
roofs to closed vent systems routed to a control device.  The
applicability of the storage tank provisions, and the
determination of the level of control required, are based on the
size of the tank and the vapor pressure of the contents.  In
general, the storage tank provisions apply only to pure solvent
and pure monomer storage vessels at elastomer facilities, since
the HAP concentrations (and resulting HAP vapor pressure) in raw,
intermediate, and final products are very low.

     The applicability of the wastewater provisions is determined
by the wastewater flow rate and the HAP concentration at the
point of generation (i.e., at the exit of the process unit where
the wastewater is generated).  A simple description of the
wastewater provisions is that the wastewater must be kept in
tanks, impoundments, containers, drain systems, and other vessels
that do not allow exposure to the atmosphere, until this
wastewater is recycled or treated to reduce the HAP
concentration.

     The equipment leak provisions allow several compliance
options for facilities.  In general, facilities are required to
develop and implement leak detection and repair (LDAR) programs
for pumps, valves, agitators, and connectors in HAP service.
Compressors, pressure relief devices, sampling connection
systems, open-ended valves or lines, and surge control vessels
and bottoms receivers in HAP service are subject to equipment
standards that require the installation of certain types of
emission-reducing, or emission-eliminating, equipment.

     While the process vent provisions also closely resemble the
HON, there are a few differences.  The HON requires the
calculation of the Total Resource Effectiveness (TRE) index for
each vent stream.  A process vent with a TRE index at or below
the threshold value of 1.0 must be controlled.  The control may
be in the form of a 98 percent reduction in emissions using add-
on control, or a process change that alters the vent stream
characteristics so that the TRE index is above 1.0.  The
regulatory alternative for front-end process vents from
continuous processes are based on the HON TRE.

     At the butyl rubber and halobutyl rubber facilities,
halogenated vent streams were vented to a flare, resulting in
hydrogen chloride emissions.  The HON would not allow a
halogenated vent stream to be controlled by a flare, meaning that
these facilities would need to install incinerators to control
the halogenated organic compound, followed by scrubbers to
control the hydrogen chloride generated by the combustion of the
halogenated organic.  The only emission reduction that could be
attributed to the HON level of control would be the hydrogen
chloride emissions, while the full cost of the incinerators and

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scrubbers would be incurred.  Therefore,  an intermediate
regulatory alternative was therefore developed that required the
HON level of control for all front-end process vents, except for
halogenated vent streams that were already vented to a flare.
The HON level of control was maintained as the second regulatory
alternative for both subcategories.

     For batch processes, the regulatory alternative for front-
end process vents is based on EPA's Alternative Control
Techniques Document for Batch Processes.3  Similar to the TRE
method, this approach determines whether control is required
based on vent stream characteristics.

     For three subcategories (ethylene propylene rubber,
polybutadiene/styrene butadiene rubber by solution, and styrene
butadiene rubber by emulsion) the regulatory alternative for
back-end process operations is a residual HAP limit.  For
polybutadiene/styrene butadiene rubber by solution and ethylene
propylene rubber, this limit is in units of kilogram (kg) of HAP
per Megagram (Mg) of dry rubber processed in the strippers.  The
units for styrene butadiene rubber by emulsion are kg HAP per Mg
of latex.  The regulatory alternative does not require any
additional control for facilities in other subcategories.

     The impacts analysis for this project is being conducted on
a facility-specific basis.  Using information provided by the
facilities and applicable State regulations, a baseline level of
control was established for each facility.   This baseline level
of control was then compared to the regulatory alternative level,
to determine which facilities would be required to install
controls to meet the provisions of the regulatory alternative.
Table 2 shows the instances where it is predicted that control
will be required.

     Subpart I of 40 CFR 63 requires that certain components in
HAP service at styrene butadiene rubber and latex, polybutadiene
rubber, and Hypalon® facilities comply with the Subpart H
provisions  (negotiated regulation for equipment leaks).  For the
styrene butadiene rubber by emulsion and Hypalon® subcategories,
it was estimated that there are no additional components in HAP
service that are not now required to meet the Subpart H  level.
Therefore, no emission reductions are achieved, or costs or other
impacts incurred,' at facilities in these two subcategories.  This
is also true for the covered components at styrene butadiene
latex, styrene butadiene rubber by solution, and polybutadiene
rubber by solution facilities.  However, it was determined that
there are components at facilities in these categories not
covered.  Emission reductions and the costs for these components,
and for all other facilities, were calculated as the incremental
emission reductions and costs between the existing control
program and the  Subpart H level.  Six facilities reported no
equipment leak control program, and they would achieve emission
reductions  and incur costs  from an uncontrolled level.

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TABLE 2.   PLANT-SPECIFIC  IDENTIFICATION  OF AREAS REQUIRING CONTROL
                   TO MEET THE REGULATORY ALTERNATIVE
Plant:
Storage
Location of F
Process
Front -End
redicted Emis
Process
Back-End
sion Control
Equipment
Leaks
Wastewater
Butyl Rubber
BR-1

Xa

X
X
Epichlorohydrin Rubber
EPI-1
X

Ethylene-Propylene Rubber
EPR-1
EPR-2
EPR-3
EPR-4
EPR-5

X



X
X





X




X

X
X
X
X
X







Halobutyl Rubber
HBR-1
X
Hypalon™
HYP-1

xa




X




Neoprene
NEO-1
NEO-2
NEO-3



X
X




X
X
X



Nitrile Butadiene Latex
NBL-1
NBL-2
NBL-3






Nitrile Butadiene Rubber
NBR-1
NBR-2
NBR-3
NBR-4
,
X









X
X
X





X
X
X
X
X







* Front-end process vent control required at the butyl  rubber and halobutyl
rubber facilities to meet the first regulatory alternative.   Additional front-
end process  vent control is  required to meet the second regulatory
alternative.

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TABLE 2.  PLANT-SPECIFIC IDENTIFICATION OF AREAS REQUIRING CONTROL
                TO MEET THE REGULATORY ALTERNATIVE
Plant
Storage
Location of P
Process
Front-End
redicted Emis
Process
Back-End
sion Control
Equipment:
Leaks
Hastewater
Polysulfide Rubber
PSR-1




Polybutadiene/Styrene Butadiene Rubber by Solution
SBR/PBRS-1
SBR/PBRS-2
SBR/PBRS-3
SBR/PBRS-4
SBR/PBRS-5













X
X
Styrene Butadiene Latex
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-8
SBL-9
SBL-10
SBL-11
SBL-12
SBL-13
SBL-14
SBL-15
















X




























X
X
X
X
X








X
X
X
X
X
X
X
X
X
X
X
X
X
X
X







X


X




Styrene Butadiene Rubber by Emulsion
SBRE-1
SBRE-2
SBRE-3
SBRE-4










X
X



-
X




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PRIMARY ENVIRONMENTAL IMPACTS

     The primary purpose of the regulatory alternative is to
reduce HAP emissions.  This section presents the nationwide
primary air pollution impacts (i.e., HAP emission reduction)
resulting from the application of the regulatory alternative
discussed above.  The HAP emission reductions were calculated by
theoretically applying sufficient controls to each emission
source to bring them into compliance with the regulatory
alternative.  Control technologies and the efficiencies used in
the calculation of emission reductions are shown in Table 3.  It
should be noted that the reguired control was only incremental
for equipment leaks.  That is, for process vents, storage tanks,
and wastewater, the controls were always applied to previously
uncontrolled sources.

     Table 4 shows the subcategory-specific HAP baseline
emissions, by emission source type, and Table 5 shows the
expected HAP emission reductions.  As shown in Table 5, the
regulatory alternative is expected to reduce HAP emissions by
almost 6,400 Mg/yr.  This represents a 48 percent reduction from
baseline.  Baseline HAP emissions from the Epichlorohydrin and
Nitrile-Butadiene Latex subcategories are expected to be reduced
by 77 and 85 percent, respectively.  These percentages represent
the maximum reductions anticipated.  It was projected that the
single facilities in the Hypalon® and Polysulfide Rubber
subcategories would not require any additional control to meet
the regulatory alternative level.

     Around 49 percent of the total HAP emission reduction will
be achieved through the equipment leak provisions.  The
combination of equipment leaks and process vents accounts for
80 percent  (almost 6,000 Mg/yr) of the total expected HAP
emission reduction.  Attachment 1 contains baseline emissions and
expected emission reductions for each facility.


SECONDARY ENVIRONMENTAL IMPACTS

     While the primary impact of the regulatory alternative is to
reduce HAP emissions, the application of control technologies can
also have other environmental effects.  These impacts can be
positive, such as1 a reduction in non-HAP volatile organic
compound air emissions; or negative, such as the generation of
additional wastewater or solid waste.  In this section the
secondary impacts on air pollution, water pollution, and solid
and hazardous wastes are discussed.

Air Pollution

     For the sources included in this project, the secondary air
pollution impacts are the increased criteria pollutant emissions
caused by the on-site combustion of organic HAP's and fuels.

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                                  8
   TABLE 3.   CONTROL TECHNOLOGIES  SELECTED TO COMPLY WITH
 REGULATORY ALTERNATIVES AND ASSOCIATED EMISSION REDUCTIONS
  Emission  Source Type
                             Selected Control Technology
                                         Percentage
                                         Reduction
 Storage Tanks




 Process Vents



 Wastewater

 Equipment Leaks
Internal Floating Roof with liquid-
mounted primary seal,  controlled
fittings, and rim-mounted secondary
seal
Thermal
Flare
Thermal
        inc ineratorc

        incinerator + scrubber

Steam stripper

Compressors:  closed-vent system
Open-ended lines:  gate valve
Sample connections: closed purge
system
Pressure-relief valves: rupture disk
assembly
Pumps, valves, connectors: leak
detection and repair programs
                                            95"
98°
                                             90'
                                            100f
                                            100f
                                                                    100r
•  All  storage  tanks  needing control were  fixed  roof,  uncontrolled tanks
containing a HAP material that required a  floating  roof.

b  HON  BID IB,  page 2-57.

c   VENTCOST,  a process  vent  costing algorithm  developed  by  Radian
Corporation, was used  to calculate costs.   VENTCOST costs out  flares,
incinerators, and incinerators plus scrubbers, and selects the most cost-
effective alternative.

d  HON  BID IB,  page  3-2 for flares,  page 3-8 for incinerators,  page 3-12
for scrubbers.

e  Compound-specific  fraction removed (Fr) values obtained from Table 9 of
promulgated HON.  It  was assumed that 100 percent of the organic material
stripped from the wastewater is returned to the  process.

f  Equipment Leak Protocol  Document, page 5-2.

8  Since  most  facilities have some type  of LDAR program,  the emission
reductions  were  incremental from the  existing  level, rather  than from
uncontrolled.  The percentage  reductions were obtained from page 5-8 of
the Equipment Leak Protocol Document.

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                                11

This combustion results in the emission of nitrogenous oxides
(NOX) ,  carbon monoxide (CO),  particulate matter (PM),  and sulfur
dioxide (SO2) .

     The emission of these five criteria pollutants will also
occur as a result of the combustion of coal, oil, or natural gas
used to generate the additional energy needed for control
equipment.  These off-site air impacts were not included in this
analysis,  although energy impacts are addressed later in this
memorandum.

     There is no on-site combustion associated with the selected
control technologies for either storage tanks or equipment leaks.
Therefore, no secondary air impacts are expected from these
technologies.

     Table 6 presents the estimated secondary air impacts for
process vent and wastewater control technologies.  The total
criteria air pollutant emissions are estimated to be around
282 Mg/yr, with NOX emissions from incinerators and boilers
accounting for around 258 Mg/yr.  The emissions associated with
wastewater controls constitute only around 4.5 Mg/yr.  Brief
discussions of the methodologies used to calculate the emissions
shown in Table 6 follow.  More detailed information is included
in Attachment 2.

     Process vents.  Secondary air impacts from process vent
controls are a result of the combustion of organic HAP's (and
supplemental fuel) in flares and incinerators.  Testing at a
polymer and resin process unit using an incinerator for VOC
control measured NOX ranging from 20.2 to 38.6 ppmv.4  NOX
emissions were calculated using 21.5 ppmv, which is consistent
with the procedures used in the SOCMI CTG.5  Measured NOX
concentrations in flare outlet streams are were lower than those
from incinerators, ranging from 0.4 to 8.2 ppmv.6  The
concentration used in this analysis was 8.2 ppmv.  The outlet
flow rate from the incinerator or flare was used, in conjunction
with these concentrations, to calculate NOX emissions.

     CO, PM, and SO2 emissions were calculated using emission
factors from AP-427  for natural gas combustion in boilers with
a total heat input design of between 10 and 100 million Btu/hr.
The emission factors used are 35 Ibs emitted per million ft3 of
natural gas burned for CO, 3 Ibs per million ft3 for PM,  and 0.6
Ib per million ft3 for S02.   The  combined  volume of  supplemental
natural gas and organic HAP was multiplied by the emission
factors to estimate emissions.

     Wastewater.  Steam stripping was the control technology that
was analyzed for wastewater.  Secondary air impacts associated
with steam stripper operation can occur from two sources:
(1) combustion of fossil fuels for steam generation, and

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                               13

(2)  handling or combustion of the recovered organic compounds.
For the purpose of this evaluation,  it was assumed that recovered
organics are handled properly.

     It was assumed that steam is generated on-site in an
industrial boiler burning fuel oil with a thermal efficiency of
80 percent.  The fuel oil consumption was calculated using a
heating value of 150,000 Btu per gallon of fuel oil.  The fuel
oil was assumed to be #6 fuel oil, containing 1.5 percent sulfur
by weight.  The emission factors for this situation are 3.15 Ib
emitted per 1000 gallons of fuel oil burned for PM, 0.285 lb/1000
gal for SO2/  5  lb/1000 gal for CO, and 55 lb/1000 gal  for NOX.8

Water Pollution

     Potential water pollution impacts from several of the
control technologies are associated with the regulatory
alternative.  The wastewater and equipment leak controls actually
have positive effects on water quality, although these effects
are minimal.

     Steam strippers remove organic compounds from wastewater,
thereby improving the quality of the wastewater being discharged
to the wastewater treatment plant or to a publicly-owned
treatment works (POTW) facility.  Therefore, their use has a
positive impact on water quality.

     Reduction of organic HAP emissions from equipment in liquid
service may result in reduced loading to wastewater streams.
However, the nature of these organic materials is that they
evaporate to the air.  Overall, the impacts, both positive and
negative, on wastewater from the equipment leak provisions would
be minor.

     The potential for water pollution is also present with
storage tank improvements.  Before an internal floating roof can
be installed or upgraded, the tank must be emptied and cleaned.
A small amount of wastewater will be generated during tank
cleaning, but it is not expected that this source of water
pollution will result in adverse impacts on water quality.

     The largest impact on water pollution is associated with
process vent controls.  Control of organic HAP emissions using
combustion does not result in any significant increase in
wastewater discharge, since no water effluents are generated by
the thermal incinerator or flare.  However, the use of an
incinerator/scrubber system for control of halogenated organic
HAP vent streams results in increased water consumption.

     In a scrubber control system, water is used to remove the
acid gas contained in the thermal oxidizer outlet stream.  The
amount of wastewater generated is equal to the amount of water
needed by the scrubber to absorb the acid gas leaving the

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                                14

incinerator.  It is estimated that almost 46 million gallons of
wastewater will be generated annually from acid scrubbers at
Butyl rubber, Ethylene-Propylene Rubber,  and Neoprene facilities.
Almost 41 million of this total are from the butyl rubber
facility.  A key assumption used in this analysis is that
17 gallons of scrubber water flow is required for each 1,000 scfm
of vapor entering the scrubber.  This ratio was used in the HON
analysis.9  Details of this estimate are  provided in
Attachment 3.

     It is not expected that the increased wastewater flow will
affect plant wastewater treatment or sewer capacity.  However,
the absorbed acid gas may cause the water leaving the scrubber to
have a low pH.  This acidic effluent could lower the pH of the
total plant effluent if it is released into the plant wastewater
system.  Some process units may recover the acidic scrubber
effluent for reuse or resale.

     The water effluent guidelines for individual States may
require that industrial sources maintain the pH of water effluent
within specified limits.  To meet these guidelines, the water
used as a scrubbing agent may need to be neutralized prior to
discharge to the plant wastewater system.  The scrubber effluent
can be neutralized by adding caustic (NaOH) to the scrubbing
water.  The amount of caustic needed depends on the amount of
acid gas in the waste gas from the combustion device.

     The salt formed in the neutralization step must be purged
from the system and properly eliminated.   The methods of disposal
include direct wastewater discharge or salt recovery.  Salt
recovery is only justified for large vent streams containing a
high percentage of halogens.  In developing the cost impacts
presented later in this memorandum, the cost of caustic needed
for neutralization was not included.  Further, the costs
associated with the disposal of the salt were not judged to be
significant in comparison to the control costs, and, therefore,
were not included in the projected impacts.

     The use of scrubbers to remove hydrochloric acid from the
incinerator exhaust gas also has the potential to result in small
increases in the quantities of organic compounds released into
plant wastewater.  However, only small amounts of organic
compounds are released into the scrubber wastewater, and the flow
of wastewater from the scrubber is small in comparison to total
plant wastewater, especially in installations where there are
multiple chemical processing units using a central wastewater
treatment process unit.  Therefore, the increase in the release
of organic compounds in plant wastewater is not likely to be
significant.

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                                15

Solid and Hazardous Waste

     In general, there are few solid or hazardous waste impacts
associated with the implementation of the regulatory alternative
for the subcategories included in this project.  There are no
significant solid or hazardous wastes generated as a result of
storage tank control by tank improvements, or as a result of
process vent control using a thermal incinerator, flare, or
scrubber.

     Solid waste from equipment replacement includes seals,
packing, rupture disks, and other used equipment components, such
as pumps and valves.  Metal solid wastes such as mechanical
seals, rupture disks, and valve parts could be sold to companies
that can recycle the metal.  Although additional monitoring of
equipment may result in a greater rate of replacement for faulty
equipment, it may also reduce equipment failure.  Overall, no
significant impact is expected on solid waste as a result of
implementing the equipment leak provisions.

     Solid and hazardous waste could be generated from the use of
steam strippers to control wastewater emissions.  The possible
sources include organic compounds recovered in the steam stripper
overheads condenser, solids removed during feed pretreatment, and
wastes generated in the control of system vent emissions.  System
vent emissions, if not sent to a combustion control device, may
be collected on a sorbent medium that requires either disposal or
regeneration.  If the sorbent is disposed of, it creates
additional solid waste.

     Although waste generation can increase for any nonrecyclable
organics that cannot be used as supplemental fuel, these organic
wastes would most likely have been removed otherwise from the
wastewater via the air (volatile organics only) or via an
oil/water separator.  Similarly, solids removed from the
wastewater in cases where pretreatment is necessary would have
likely been removed in a clarifier or activated sludge unit.


ENERGY IMPACTS

     The energy demands associated with the control technologies
for the regulatory alternative include the need for additional
electricity, natural gas, and fuel oil.  The storage tank and
equipment leak controls are not expected to require any
additional energy.  The total nationwide energy demands that
would result from implementing the process vent and wastewater
controls are presented in Table 7.  Overall, the controls will
require around 1.18 x 1012  Btu annually.   More  detailed
information is provided in Attachment 4.

     The amount of electricity required to operate the fans and
blowers was estimated by calculating the horsepower required to

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          16
TABLE 7.  ENERGY IMPACTS
Subcategory
Butyl Rubber - Reg Alt I
Reg Alt II
Ethylene Propylene Rubber
Halobutyl Rubber- Reg Alt I
Reg Alt II
Neoprene
Nitrile Butadiene Rubber
Polybutadiene/Styrene
Butadiene Rubber by Solution
Styrene Butadiene Latex
Styrene Butadiene Rubber by
Emulsion
TOTAL - Reg Alt I
Reg Alt II
Energy Impacts (106 Btu/
Process Vent Control
Electricity
96
595
7,261
0
72
42

43,070
0
10,195
60,664
61,235
Natural Gas
6,300
97,792
75,052
535
758
196

753,688
418
176,329
1,012,518
1,104,234
yr ) From
Wastewater
Control
Fuel Oil
6,575
6,575



3,375

8,088
5,363
23,401
23,401

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                                17

transport the vent stream.  Electricity to operate fans and pumps
for scrubbers and steam strippers was calculated in a similar
manner.

     The use of a combustion device generally results in an
increased natural gas usage for device start-up, supporting
combustion of the vent stream, or to promote flame stability, if
the heat content of the vent stream is low.  The fuel impacts are
equal to the design fuel requirement.  The fuel requirements are
dependent on the flow rate and the heat content of the HAP
stream.

     Wastewater steam strippers require additional energy to
produce the steam.  As discussed in the secondary air pollution
impacts from wastewater control section, it was assumed that this
energy was generated through the combustion of fuel oil in a
boiler.  The fuel usages are based on the steam stripper design,
and the boiler characteristics that were discussed previously.


COST IMPACTS

     The costs to the affected industry due to the application of
the requirements of the regulatory alternative include the costs
of any control equipment that must be purchased, along with the
costs of the installation of that control equipment.  There are
also costs for the operation of control equipment.  There may
also be costs associated with certain work practices and other
programs that reduce HAP emissions.  Finally, there are costs
associated with the required reporting, recordkeeping, and
monitoring.  In the next section, the methodology used to
estimate the cost impacts is discussed, followed by a
presentation of the estimated costs.

Cost Estimation Methodologies

     The costs can be separated into two basic types: (1) those
directly associated with control equipment or practices, and
(2) those associated with monitoring, reporting, and
recordkeeping.

Control costs

     The methodologies used to estimate the capital and annual
control costs for the expected regulatory alternative are the
same as the methodologies used to estimate the costs of the HON.
These methodologies are described in detail in Volume IB of the
HON Background Information Document.10   Parameters  used  in the
costing analysis are shown in Table 8.

     The regulatory alternative includes flexibility in the
manner in which compliance may be achieved.  In order to estimate
capital and annual costs, a single option was designated for  each

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                               18
       TABLE 8.   PARAMETERS USED IN POLYMERS AND RESINS  I
                         COST  ANALYSIS
                 Parameter
      Value
 Base  Year

 Chemical Engineering Plant Cost Index

 Natural Gas  Cost

 Electricity  Cost

 Water Cost

 Operating  Labor Rate

 Maintenance  Labor  Rate

 Interest Rate

 Raw Chemical Cost  Used  for Recovery
 Credits

 Equipment  Life
   Steam  stripper
   Flare,  incinerator, scrubber
   Internal floating roof
   Closed-vent systems
   Gate valves for  open-ended lines
   Closed-purge systems
   Monitoring instrument
   Rupture  disks
   Pump seals
    July 1989

       356

    $3.03/ft3

   • $0.0509/kwh

$0.22/ 1000 liters

    $13.20/hr

    $14.50/hr

    7 percent3

    $9.98/Mgb
     15 years
     10 years0
     10 years
     10 years
     10 years
     10 years
      6 years
      2 years
      2 years
a  In the HON cost  analysis,  an  interest  rate  of  10  percent was
used.

b  An average raw chemical cost  of HAP's  used  in  the elastomer
industry was calculated using 1989 chemical costs obtained from
Mannsfield's Chemical Products Synopsis.

c  The HON BID assumed a 15 year equipment life for  flares, and
10 years for incinerators and scrubbers.   However, VENTCOST uses
a single capital recovery factor for all equipment.

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                                19

emission source type.  Table 9 provides more detail on how the
costs were developed.

     For equipment leaks and storage tanks, EC/R developed
spreadsheets that calculated costs using the HON methodologies.
VENTCOST, a costing algorithm developed by Radian Corporation and
used in the HON impacts assessment, was used to estimate thermal
incinerator, flare, and scrubber costs for process vents.
Similarly, a spreadsheet developed by Radian was used to estimate
the cost of steam strippers for wastewater streams.  Electronic
copies of these programs may be found in Section II-I of the
docket (Docket item numbers II-I-3 and 4).

Monitoring, reporting, and recordkeepinq costs

     In addition to the control costs, the facilities will incur
monitoring, reporting, and recordkeeping (MRR) costs.  At the
time of the initial impacts assessment, the exact details of the
MRR requirements of the proposed rule were not known, although it
was expected that they would resemble those in the HON.
Therefore, estimates of the MRR costs for the regulatory
alternative were made based on the HON MRR costs.

     The HON SF-83 analysis11 was used to obtain  average
facility MRR costs.  For facilities in subcategories already
subject to the HON equipment leak requirements, adjustments were
made to the average facility MRR costs, since these requirements
would be present in the absence of an elastomer standard.  A
nationwide total MRR cost was then calculated by multiplying the
number of plants by the appropriate average facility MRR costs.
The ratio of the annual MRR cost to the total annual control cost
was calculated, which was 0.31.  This analysis is documented in a
separate EC/R memorandum,12 which is  included  as  Attachment  5.

     To estimate the MRR costs on a facility-specific basis, the
nationwide MRR cost to control cost ratio discussed above was
multiplied by the estimated facility-specific control costs.  For
instance, if the annual costs associated with installation and
operation of an incinerator were $100,000, the estimated annual
MRR costs would be $31,000, making the total estimated annual
costs $131,000.  On a facility-specific basis, this type of
analysis probably overstates the MRR costs for those facilities
where control is 'required, and understates the MRR costs for
facilities where no additional control is required (where there
would be no estimated MRR costs).  However, this analysis does
provide a reasonable nationwide estimate for the entire Polymers
and Resins I project.

     As noted above, it was necessary to estimate the MRR costs
before the details of the MRR requirements of the proposed
regulation were known.  The impacts shown in this memorandum are
based on these earlier estimates.  However, the results of the
SF-83 analysis for the proposed elastomer regulation13

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20








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                                22

($4.1 million for all subcategories) are relatively consistent
with the preliminary estimates used in this analysis ($4.4
million).

Estimated Costs of Compliance

     The estimated total capital investments and total annual
costs are presented by subcategory in Table 10.  More detailed
cost information is provided in Attachment 6.

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                 24
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                                25

REFERENCES

1.  Memorandum,  from Clark,  C. EC/R  Incorporated,  to Evans, L. ,
U.S. Environmental Protection  Agency.   Potential for New Sources
Producing Elastomers (Polymers and Resins I).  May 10, 1995.

2.  Memorandum  from Norwood,  P. EC/R  Incorporated  to Evans, L. ,
U.S. Environmental Protection Agency.  MACT Floors and Regulatory
Alternatives  for  Elastomer   Production  Industry   (Polymers  and
Resins I).  May 10, 1995.

3.   Control of  Volatile Organic  Compound Emissions  from Batch
Processes.   Alternative  Control  Techniques.   EPA-453/R-93-017.
United States Environmental Protection Agency,  Research Triangle
Park, North Carolina.  November 1993.

4.  Lee,  K.W.  et al.,  Radian  Corporation.   Polymers and Resins,
Volatile Organic  Compound Emissions  from Incineration, Emissions
Test Report,  ARCO  Chemical  Company,  LaPorte Plant,  Deer Park,
Texas.   Volume  I:   Summary of Results.   Prepared  for the United
States Environmental  Protection Agency,  Research  Triangle Park,
North Carolina.   EMB Report No.  81-PMR-l.   March  1982.   pp. 12
through 15.

5.  Control  of Volatile  Organic Compound Emissions from Reactor
Processes and Distillation Operations Processes in the Synthetic
Organic Chemical Manufacturing Industry.  EPA-450/4-91-031.  United
States Environmental  Protection Agency,  Research  Triangle Park,
North Carolina.  August 1993.

6.  McDaniel,  M.   Engineering Science.   Flare Efficiency Study.
Prepared  for  United  States  Environmental  Protection  Agency,
Washington,  D.C.    EPA-600/2-83-052.   July  1983.    p.  134 and
technical report data sheet.

7.   Compilation  of  Air  Pollutant  Emission Factors.   Volume I:
Stationary Point and Area Sources.  AP-42 Fourth Edition.  United
States Environmental  Protection Agency,  Research  Triangle Park,
North Carolina.  September 1985.

8.  Reference 2, p. 1-3.2

9.  Memorandum from Ferrero,   B.,  Radian Corporation, to Project
File 6.1.  Estimating Liquid to Vapor  Flowrate Ratios  in Scrubber
Columns.  February 5, 1992.

10.  Hazardous Air  Pollutant  Emissions from Process Units in the
Synthetic Organic Manufacturing Industry—Background  Information
for Proposed Standards.  Volume IB:  Control Technologies."  Draft
EIS.  EPA-453/D-92-016b.   United  States Environmental Protection
Agency,  Research Triangle Park, North  Carolina.  November 1992.

11.  HON SF-83 and Supporting  Statement

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                                26

12.  Memorandum, from Norwood, P.,  EC/R Incorporated to Evans, L.
U.S.  Environmental  Protection  Agency.    Estimated  Monitoring,
Reporting, and  Recordkeeping  Costs  for  Polymers and  Resins I.
August 9, 1994.

13.  SF-83 and Supporting Statement.

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                        ATTACHMENT 1


FACILITY-SPECIFIC BASELINE EMISSIONS AND EMISSION REDUCTIONS

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                 ATTACHMENT 2


CALCULATION OF SECONDARY AIR POLLUTION IMPACTS

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               Calculation Methodology Description

Secondary air pollution  from process  vent control devices

•  HAP MW is weighted-average molecular weight of all HAPs in
   vent stream.  For  example,
     a vent stream for facility EPDM-2 contains 302,178 Ibs/yr  of
     chloroprene  (MW=65)  and 25,000  Ibs/yr of hexane (MW=86).

          302,178 + 65 = 4,649  Ib-moles chloroprene/yr
           25,000 -i- 86 = 291 Ib-moles hexane/yr

     Stream HAP MW  = 327,178 total  Ibs/yr + 4,940 total Ib-moles
                    =66.2 Ib/lb-mole

•  HAP emission rate  (Ibs/hr) and operating schedule (hrs/yr)
   obtained from information provided by companies

•  HAP flow is calculated from  the HAP emissions rate assuming
   ideal gas behavior.   For  example,
     a vent stream for facility BR-l emits methyl chloride at a
     rate of 33.2 Ibs/hr for 8760 hrs/yr.  The volumetric flow
     rate of HAP is

 33.2 lb      8,760 hrs      Ib-mole      392 ft3
         X             X           X           =    2.3 x 106 ft3/yr
   hr           yr         50.5 lb      Ib-mole

•  The natural gas flow  rate and outlet flow rate were calculated
   by VENTCOST.

•  NOX emissions from incinerators and flares were calculated
   assuming 21.5 ppmv and 8.2 ppmv,  respectively, which is
   consistent with the methodology used in the SOCMI CTG.  For
   example,
     the outlet flow  rate from  the incinerator controlling a
     stream at facility  EPDM-1  is 23,906 scfm.  The incinerator
     operates 8760 hrs/yr.   NOX emissions were calculated as
     follows:

 23,906 ft3        60 min       8,760 hrs       21.5 ft3 NOX
            x             x             x 	-—f— x
     min           hr            yr          l  x 106  ft3

   1  Ib-mole       4'6 Ibs NOY    	Mg	
         ,     X              X             =   14.3 Mg NCL. emissions/yr
    392 ft3         1 Ib-mole      2,200 Ibs

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               Calculation Methodology Description

Secondary air pollution from process vent control devices
                            (continued)
   The emission factors used to calculate SO^, PM, and  CO
   emissions are from AP-42  (page 1-4.2), which are  emission
   factors for natural gas combustion in boilers. The  factors
   used were for a furnace with a total heat  input of  between 10
   and 100 million Btu/hr.  These emission  factors are
   S02
   PM
   CO
- 0.6 Ibs emitted per million ft3 of natural gas burned
- 1-5 (3 used) Ibs per million ft3
- 35 Ibs per million ft3
   The combined volume of supplemental natural  gas  and organic
   HAP was multiplied by the emission factors to  estimate
   emissions.  For example,
     a vent stream at the SBRE-4  facility had a natural gas flow
     rate of 59.1 x  106 ft3/yr, and a HAP  flow  rate of  0.4  x 106
     ft3/yr.  The annual CO emissions from the  combustion of this
     stream in a thermal incinerator are  as  follows:

  59.5 x 106 ft3      35 Ibs  NOX     	Mg	    0.9  Mg CO emissions/yr
 «»^»«B^^^_^_^^_^M>«^B^^_^«MM.   ^^^BHB~—V^^_B_BM«^^^^^B    ^^^•B^_B^^_^«.^^«_^^^»
      yr             106 ft3        2,200 Ibs

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               Calculation Methodology Description

Secondary air pollution from wastewater control  devices (steam
strippers)

•  Steam requirements calculated by Radian  steam stripper costing
   spreadsheet.

•  Fuel oil required was calculated using the  following:
   - a heating value of 150,000 Btu per gallon of fuel oil
   - it is a #6 fuel oil containing 1.5 percent  sulfur by weight
      the boiler has a thermal efficiency of 80  percent

   For example,  the fuel oil required to produce steam for a
   stream at facility SBL-8 was calculated  as  follows:

 4.68 x 109 Btu      gal fuel oil       1
               X               X 	  =     39,000 gal  fuel oil/yr
      yr           150,000 Btu       0.8

•  The emission factors used are from AP-42 (page 1-3.2), which
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   boilers.  These emission factors are

   PM  -  3.15 Ib  emitted per 1000 gallons  of  fuel oil burned
   S02 -  0.285 lb/1000 gal
   CO  -  5 lb/1000 gal
   NOX -  55 lb/1000 gal

•  The fuel oil required was multiplied by  the emission factors
   to estimate emissions.  For example,
     the vent stream at the SBL-8  facility  required 39,000 gal/yr
     of fuel oil.  The annual NOX  emissions from the combustion
     of this stream in a boiler to produce  energy for steam is:
 39 x 1,000 gal      55 Ibs  NOy    	Mg	         0.98 Mg NOX
               X             X                     emissions/yr
      yr           1,000 gal       2,200 Ibs

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             ATTACHMENT 3


CALCULATION OF WATER POLLUTION IMPACTS

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WASTEWATER GENERATED BY SCRUBBERS
Plant
BR-1 *
BR-1*
BR-1
EPDM-1
EPDM-1
EPDM-1
EPDM-1
EPDM-2
HBR-1
HBR-1&
NEO-1
NEO-1
NEO-2
NEO-2
SBL-2
SBRE-4
SBRE-4
SBRE-3
SBRE-3
SBR/PBRS-4
SBR/PBRS-4
SBR/PBRS-5
SBR/PBRS-5
Flow Rate
to Scrubber
(scfm)
4,133
251
1,595
0
0
0
0
114
0
1,617
284
220
62
157
0
0
0
0
0
0
0
0
0
hrs/yr
8,760
2,600
2,000
1,075
4,260
4,260
4,260
8,760
7,563
1,260
4,500
665
2,974
1,032
5,900
7,446
7,446
7,008
7,008
8,760
8,760
8,760
8,760
Water
Flow Rate
(1000gal/yr)
36,929
666
3,254
0
0
0
0
1,019
0
2,078
1,304
149
188
165
0
0
0
0
0
0
0
0
0
                                        45,752
   *  These streams would not require control  under Regulatory
   Alternative I.

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               Calculation Methodology Description

Wastewater generated by scrubbers controlling vent streams


•  Flow rate to scrubber  calculated by VENTCOST.

•  Water flow rate  calculated using the ratio of 17 gallons of
   scrubber water flow per  1,000 scfm of vapor at the scrubber
   inlet.  This ratio represents an average liquid to vapor ratio
   based on a vendor survey conducted by Radian in the
   development of the HON.    An example of  this calculation is
   as follows:

     An incinerator at  facility NEO-2 has an outlet flow  rate  of
     157 scfm that  is sent  to a scrubber to remove HC1.  The water
     flow to the wastewater system is calculated as follows:

   0.157x1000 ft3        17 gal       60 min      1,032 hrs      165 x 103
	 X        ~  X          X             =   gal/yr
                     1000 ft3        hr           yr
      1  Memorandum from Ferrero,  B.,  Radian Corporation, to
 Project File 6.1.  Estimating Liquid to Vapor Flowrate Ratios  in
 Scrubber Columns.  February  5,  1992.

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        ATTACHMENT  4




CALCULATION OP ENERGY IMPACTS

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CALCULATION OF ENERGY IMPACTS FROM
    PROCESS VENT CONTROL
Plant
ID
BR-1*
BR-1*
BR-1
EPDM-1
EPDM-1
EPDM-1
EPDM-1
EPDM-2
HBR-1
HBR-1*
NEO-1
NEO-1
NEO-2
NEO-2
SBL-2
SBRE-4
SBRE-4
SBRE-3
SBRE-3
SBR/PBRS-4
SBR/PBRS-4
SBR/PBRS-5
SBR/PBRS-5

Annual
Electricity
Cost
$7,203
$222
$1,438
$0
$24,835
$32,177
$51 ,068
$147
$0
$1 ,078
$346
$130
$52
$99
$0
$23,91 8
$21,401
$56,319
$50,310
$213,791
$0
$214,080
$214,080

Electricity
10~6Btu/yr
483
15
96
0
1,666
2,159
3,426
10
0
72
23
9
3
7
0
1,605
1,436
3,779
3,375
14,344
0
14,363
14,363
61,235
Natural Gas
Use
1000ft3/yr
91 ,068
424
6,300
76
14,270
15,252
44,408
1,046
535
223
142
16
20
18
418
25,813
23,547
67,846
59,123
251,330
620
250,869
250,869

Natural Gas
10~6Btu/yr
91,068
424
6,300
76
14,270
15,252
44,408
1,046
535
223
142
16
20
18
418
25,813
23,547
67,846
59,123
251,330
620
250,869
250,869
1,104,234
    tfould
under
                                  Regulatory

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               Calculation  Methodology Description

Energy impacts of process vent control


•  Annual electricity  costs calculated by VENTCOST.

•  Factors used  to  calculate the electrical energy are:

     Cost of electricity  - $0.0509 per Kw-h
     .Energy conversation factor - 3,415 Btu/Kw-h

     For example, a stream at facility SBR/PBRS-4, it was
     estimated that the annual electricity cost would be
     $213,791.
	$213,791	      Kw-h         3,415 Btu       14,363 x 10s Btu/yr
————_—_—_^_^—— ^ ———————  ^  —^———————-  ^
        yr             $0.0509         Kw-h

•  The  natural gas  use was calculated by VENTCOST.

•  The  energy  expended through the use of natural  gas was
   calculated  assuming a heating value of 1,000 Btu/ft3.   For
   example,  a  stream at EPDM-2 requires 1,046,000  ft3 natural gas
   per  year.


     1,046,000 ft3            1,000 Btu         1,046 X 106 Btu/yr

         yr                   ft3

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CALCULATION OF ENERGY IMPACTS FROM WASTEWATER CONTROL

                            Electricity
                           Requirements     Fuel Oil Requirements

    Plant     Subcategory	Kwh/yr  10^6 Btu/yr    gal/yr 10^6 Btu/yr
SBL-8
SBL-11
SBRE-1
NBL-1
BR-1
SBL
SBL
SBRE
NBL
Butyl Rubber
21,257
8,130
19,479
12,272
23,862
72.6
27.8
66.5
41.9
81.5
39,000
14,917
35,750
22,500
43,833
5,850
2,238
5,363
3,375
6,575
                                      290.25            23,400

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               Calculation Methodology Description

Energy impacts of wastewater control  (steam strippers)
   Annual electricity costs calculated by Radian steam stripper
   costing spreadsheet.

   The factor used to calculate the electrical energy are:

     Energy conversation factor - 3,415 Btu/Kw-h

     For example, for the combined stream at facility SBRE-1,  it
     was estimated that the annual electricity demand would  be
     19,479 Kw-h.

   19,479 Kw-h          3,415 Btu         66.5 x 10s Btu/yr
                 X                =
       yr               Kw-h
   The methodology for calculating the amount of fuel oil
   required is discussed in Attachment 2.

   The amount of  fuel oil was multiplied by 150,000  Btu/gal  to
   obtain the energy from fuel oil used.  For example, the
   combined stream at facility BR-l uses 43,833 gallons  of fuel
   oil per year to produce steam.

   43,833 gal       150,000 Btu         6,575 x 106 Btu/yr

       yr               gal

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ATTACHMENT 5
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               IEC/R MEMORANDUM PROVIDING THE BASIS FOR PRELIMINARY
             MONITORING, REPORTING, AND RECORDKEEPING COST ESTIMATES
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            InCOmorated            Environmental Consulting and Research
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Date:     August 9,  1994

Subject:  Preliminary Monitoring,  Recordkeeping,  and Reporting
          Costs for  Polymers  and  Resins I

From:     Phil Norwood,  EC/R

To:       Leslie Evans,  EPA/OAQPS/ESD/CPB


     This memorandum presents estimated monitoring,
recordkeeping, and reporting  (MRR) costs for the Polymers  and
Resins  I project.   These estimates are based on the MRR  cost
estimates for the  Hazardous Organic NESHAP  (HON) , and are
intended to be a preliminary estimate.  A more detailed  analysis,
specific to the  requirements of the selected regulatory
alternative for  Polymers and Resins I, will be necessary at a
later date.

     This estimation was made using the methodology from the HON
 SF-83 analysis.   Copies of the HON SF-83 and supporting  statement
 are included as  Attachment 1.  In the  HON  analysis,  the  average
 technical hours  per monitoring, reporting,  and  recordkeeping
 activity were estimated for a representative facility.   These
 numbers were multiplied by the number  of activities per  year to
 obtain  an estimated number of technical  hours per year for the
 representative facility  (source).  The estimated technical hours
 needed per source are shown  in Table  1.

      Warren Johnson  of  EPA,  the  author of  the  HON SF-83  and
 supporting statement, indicated  that  the HON estimates include
 costs for monitoring equipment.   He said that  monitoring
 equipment costs were converted to technical labor hours,  and that
 these were included in  the "gather information, monitor,  and
 inspect" activity.   However,  the SF-83 supporting information
 does not provide  details  on  this conversion.

      For the  Polymers and Resins I MRR cost estimate, EC/R used
 the technical hou'rs per source estimates shown in Table 1, and
 the other  information shown  in Table 2.  Since it is expected
 that many  of  the  control requirements (as well as monitoring,
 recordkeeping, and reporting requirements) for the Polymers  and
 Resins I regulation will be identical to those in  the HON,  this
 should provide a.reasonable preliminary estimate for this
 project.   However,  a future analysis  should take into account  the
 actual monitoring,  reporting, and recordkeeping requirements of
 the Polymers and  Resins I regulation.  Also, the assumptions for
 the HON representative plant should be examined and modified to
 reflect a  representative Polymers and Resins I  facility.
         University Tower, Suite 404 • 3101 Petty Road, Box 37 • Durham, North Carolina 27707
                    Telephone: (919)493-6099 • Fax: (919) 493-6393

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     TABLE 1. TECHNICAL HOURS NEEDED TO COMPLY WITH
 MONITORING, REPORTING, AND RECORDKEEPING REQUIREMENTS

                                         Tech hrs/yr
                                          per source
Activity
Read rule and instructions
Plan activities
Training
Create, Test, Research and Development
Gather info., Monitor/inspect
Process/Compile and Review
Complete Reports
Record/Disclose
Store/Rle
Overall*
167
276
111
2499
1250
20
151
35
27
Eq Leaks
18
12
10
1220
750
4
125
21
1
b Overall includes equipment leaks.
b This estimate incorporates costs of monitoring equipment
 TABLE 2. OTHER INFORMATION USED TO CALCULATE
MONITORING, REPORTING, AND RECORDKEEPING COSTS
   Other Labor
 Managerial Hours         5% of technical labor hours
  Clerical Hours  (,      10% of technical laborhours
              \

   Labor Rates
    Technical           $33 per hour
    Managerial           $49 per hour
     Clerical            $15 per hour

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     For each subcategory,  the overall technical labor hours per
event per source (shown in Table 1) were multiplied by the number
of facilities, to obtain the total estimated technical labor
hours per year for the subcategory.  The managerial and clerical
hours were then calculated using the percentages in Table 2.
Each type of labor hour was then multiplied by the appropriate
labor rate in Table 2 to obtain the annual cost for each event.
The sum of the individual event annual costs represent the total
MRR costs for the subcategory.

     Several subcategories  (Hypalon™,  Styrene-Butadiene Latex,
Styrene-Butadiene Rubber by Emulsion, and Polybutadiene
Rubber/Styrene-Butadiene Rubber by Solution) are already subject
to the HON equipment leaks provisions.  For these subcategories,
the total technical labor hours needed per event per facility
were calculated by subtracting the equipment leak technical labor
hours from the overall.  For instance, the technical hours per
year per source for training would be 111 - 10 = 101.

     Table 3  shows the total estimated costs for monitoring,
reporting, and recordkeeping for Polymers and Resins I.  The
total MRR cost for the project is  around $5.3 million per year,
which is approximately 31 percent  of the total control  costs.

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      TABLE 3.  ESTIMATED MONITORING,
   REPORTING, AND RECORDKEEPING COSTS

                                     MRRa Costs
Sub category      	1000$/yr
Butyl Rubber                                 $168
Halobutyl Rubber                             $168
Epichlorohydrin Elastomers                    $168
Ethylene-Propylene Rubber                   $838
Hypalon                                     $88
Neoprene                                   $503
Nitrile- Butadiene Latex                       $503
Nitrile- Butadiene Rubber by Emulsion           $670
Styrene- Butadiene Latex                    $1,404
Styrene- Butadiene Rubber by Emulsion         $351
Poly ~/Styrene-Butadiene Rubber by Soln   	$439
          TOTAL P&R I MRR COSTS ($/yr)     $5,299
                 Total Control Costs ($/yr)    $16,982
                          %MRR to total       31%

a Monitoring, recordkeeping, and reporting

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                                 ATTACHMENT  1
                      HON SF-83 AND SUPPORTING STATEMENT

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I
•x
     .83
     rlSO)
                                   Request for OMB Review
                                                                                                      -T3  -  fj
                                                                                                     -     -
•ant
^instructions before completing form. Do not use the same SF 83
uest bom an Executive Order 12231 review and approval under
Bjtrwork Reduction Act
Kr all Questions in Part 1. If this request is for review under E.O.
Wcomplete Part II and sign the reguUtory certification. If this
rt is for approval under the Paperwork Reduction Act and 5 CFR
   :p Part II, complete Part lit and sign the paperwork certification.
                                                           Send three copies of this form, the material to be reviewed, and for
                                                         paperwork—three copies of the supporting statement, to:
                                                            Office of Information and Regulatory Affairs •
                                                            Office of Management and Budget
                                                            Attention: Docket Library. Room 3201
                                                          - Washington. DC 20503
  ,—Complete This Part for All Requests.
irtmenvagency ana Sunuu/orncc originating request
  »ed States  Environmental Protection  Agency •
  ce of  Air  and  Radiation                     t
                                                                                            2. Agency coo*
  ten person oma can oen answer questions regaramgnus request
  _t 5.  Mever, MD-13:  Warren  R. Johnson,  MD-13
                                                                                              lefepnone numoer
                                                                                             (919   ) 541-5254/51:
 c» mtorrnauon couecuon or ruierruKing            ,
   Krdkeaping and'Reporting  for. the Hazardous  Organic NESHAP  (HON)  for  the  Synthetic  Organic
   ical Manufacturing Industry (SOCMI) and Other Processes Subject  to  the  Negotiated
 zulation for Equipment  Leaks
I
 ~aumorny lor mionnauon coitecuon or rule (cce United Sates Coae. Puoac i*w. artxecuuve Oraer)
  2     .„„    7412        -  _       7414
1
       .use
i
   ea pubbc (tnec* *tl oat apply)
   inormQuatt or housenolas
  0 Sine or »ocal jwvemments
3 D Farms
4 0 Businesses or other for-orcfit
S LJ Feoeral agenaes or empicyees
o U Non-profit tnstrtunons
7 E Small businesses or or^nratiorts
 ' II.—Complete This Part Only if the Request is for OMB Review Under Executive Order 12291
  [utxmwentrfief Number (RIN)                                                  '

  ——  — — ~~"  _  ___ ,^_  __. or. None assigned O
i
i*ot suomtuion (cnecx ooe in eacn utegoryj
mtOeMtion
* Ma,or
_J Nonmaior

1 O Proposed or draft
2 Q Finai or intenmtoai. with pner proposal
3 O Final or interim final wrthout poor prcoeaal
Typ* et rvrww rceuenetf
1 D Standard
2 O Pending
3 O Emergency
4 LJ Statutory or judicial deadline
   '        0" C°nUm r*oomn8 or r*eofak««o|ri8 requiremems tnat require OMB approval unoer tne Paperwork Reoucnon Aa
       U2D?
    |orrute.B there a reguUtory impact analysis attached?	1 D Yes  2 D N
  lo, "did OMB waive the analysis?	—	...'.....'..'.. 3 H Y   4 r~^ N
 fi cation for Regulatory Submissions
•pmmtngthtj reouest tor OMB review, the authorized regulatory contact and the program official certify that the requirements of LO. 12291 ano any applicable
•irectrves nave been comoiieo with.
1
4Bre ot authorized regulatory contact
1
Date
Dote

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 HI	Complete This Part Only If the Request is for Approval of a Collection
      cf intprmatlon Under the Paperwork Reduction Act and S CFR 1320.
nraci—Describe neeoX MM* "« «t*ee»0 Putabc m 5O«
rotnulgated standard will  require  control of emissions  of 110 hazardous  air  pollutants  from
reduction of  about ADO synthetic  organic chemicals.   Affected  chemical  plants would maintain
is  and  submit initial  and  sometimes semiannual  or  quarterly reports of  emission measurements
elated  information.
D Regular tubmasian
arnwUan celiectiom contained In nttm
3 tooting ?9fuMjan (no ctiinge proposed)
3 Notice of proposed rulemakmg. (NPRM)
D Final. NPRM MIS prevtousr/pubiiilMd
                                  2 D Ew«jency»unmtt«wn(certTte»»»on*n«eo*rf>

                                  6 FuuAermtenrn final without prior NPRM
                                    AQ Regular submission
                                    BO Ei»mi«ncy«UDina»ionfce/ttfie»fJon«taerteo?
                                                                        7. Enter Date of expected or actual Federal
                                                                        Register publication at ttus stage of rutemakir
                                                                        (month. Of jr. rtarJ- Fgb .  ?R .
aeef imntm requested (cnecxanlyont)
D Newcollection               ,
j Revnion of A cunently spprovvj
   Extension of the operation date D! a cutrtmtyapomvi collection
   witftotfl >tw ctuntt in the suosttncv or in tft> tncttioo of
                                                           4    R«nsatement of a premotaty ipproveti collection for which apprwii
                                                                tttU C3CPW0

                                                           5-O Existingcolieetionin use without an OMB control number
•
*ncy report term nutnoerts) f include JIMOJ /0/topuonf/
1414.02
•uiai teaonmg or ooctauve buraen
i umber of responofnci

oat annual responses (brie J tmesSntS) . , .


nuai recorouepmg ouroen
ttrnberof recorOkeepen ..".......
Jinual hours per reconiKeeoer. 	 	
atal rfforrtMrnteing tv^fff (Im» J f*"ff binff ,
•eeordkeeoin? mention oenod 	
at annual buraen
t current OMB memory 	
Xtrerenca(linejfcutot2? 	
agnation ofdttitrinc*

Trent (man neent) OMB contra number or mnment i

fDnn imffioenjJUy
389
4
1.556
1341.18-
2,086,870--
389
105
40.840
5 *«an
2,127,710
-0-
2.127,710
2,127,710
-0-
ijumoer
t

22. PuTpuaeot uiloiiitauuii collection (cnecka^ mtnyisiopty)
lQ Aopliotm for benefits
2 D Program evaluation
3Q General purpose stras&cs
4 f)CJ Reguiato^f or compliance
5Q Program punning or mana|ement
6 Q Research
7Q Audit

21. Freauency ot recoreaecping or reponmg (cnecx »u ma: aspty)
1 K! ReearflKeeomg
ntfOfOftf

3 D Weekly
4 D Monthly
5 ID "Quarterly
6 3 Semiannual))/
?O Annually
BD Biennially

1 D Voluntary
  Questeo ezptrauon can
  aars  from  promulgation  (or  approval  if later)
                                                            2O Required to oatam or retain a benefit
                                                            3 SI Manoatofv
  ttherexj
MM
                         «ialaferoe»orinstautic«Jsoratt>epnnMrypcnxMottfiecDllea>onremrttoFeo«ralefl
  ses the ajency use sanptmf to
                                                   or prescribe the uu of camping or
                                                                                           l anaiysa
                                                                                                          D*
  ^uatory autnomy tor me imorr
      40   cn>   63
                                        ,:or.
                                                       FR.
                                                                          ,; or. Other (specify):
- tntnrTtihnTntntfnrnMP ipprnMLTlnntrcf held. Tin
                                                   rffrr*' ~ — •"•t^*-mT rmrnmntirr mUfm tnrr tnr n ........ iirmi nf j mr 1170
uue at program ottioai

•ector.-Office of Air Oualitv Planninc and Standards
                                                                                               Date

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               PART A OF THE SUPPORTING STATEMENT

1.    Identification of the Information Collection

     (a)   Title and Number of the Inforrnation Collection.

     "Reporting and Recordkeeping Requirements for the Hazardous
Organic NESHAP (HON)  for the Synthetic Organic Chemical
Manufacturing Industry (SOCMI)  and Other Processes Subject to the
Negotiated Regulation for Equipment Leaks."

     (b)   Short Characterization.

     Respondents are owners or operators of processes in SOCMI
industires, styrene-butadiene rubber production, polybutadiene
production, chloride production, pesticide production,
chlorinated hydrocarbon use in production of chemicals,
pharmaceutical production, and miscellaneous butadiene use.  It
is estimated that about 370 existing plants will be subject to
the standards. All sources must be in compliance with the
requirements of the standard for equipment leaks within  18 months
of the effective date of that rule.  in addition, new sources
must be in compliance with the standard for process vents,
storage, transfer, and wastewater emissions  (Subpart G)  at
startup. Existing sources are not required to comply with Subpart
G until three years after the effective date of the rule.

     Generally, respondents are required by  law to submit onetime
reports of start of construction, anticipated and actual start-up
dates, and physical or operational changes to existing
facilities.  In addition, Subpart G requires respondents to
submit five types of reports:   (1) Initial Notification,  (2)
Implementation Plan,  (3) Notification of Compliance Status,  (4)
Periodic Reports, and (5) several event triggered reports.  The
Initial Notification report identifies sources  subject to the
rule and the provisions which apply to these sources.  In the
Implementation Plan, an owner or operator details how the source
will comply with the provisions of Subpart'G.   The Notification
of Compliance Status is submitted to provide the  information
necessary  to demonstrate that -compliance has been achieved.  The
Periodic Reports1'provide the parameter monitoring data for  the
control devices, results of any performance  tests conducted
during the period, and information on instances where  inspections
revealed problems.  Subparts H  and I require the  source  to  submit
an initial report detailing the  equipment  and process  units
subject to, and schedule for implementing  each  phase  of, the
standard.  Owners and operators  also have  to submit  semiannual
reports of the monitoring results  from the  leak detection  and
repair program in the equipment  leak standard,  and quarterly
reports for all points included  in an emissions average.  All
records are to be maintained by  the  source  for  a  period  of  at
least 5 years.

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     All reports are submitted to the respondent's State agency,
if it has an approved Title V permit program implementation
authority, or the appropriate Environmental Protection Agency
(EPA) Regional Office.  The reports required by Subparts G, H and
I are used to determine that sources subject to the rule are in
compliance with the rule.

2.   Need for and use of the Collection.

     (a)  Need/Authority for the collection.

     Section 112 of the Clean Air Act, as amended in 1990,
requires that EPA establish standards to limit emissions of
hazardous air pollutants (HAP) from stationary sources.  The
sources subject to the proposed rule can potentially emit  149 of
the  189 HAP's listed in Section 112.  Section 114 of the Act
gives the EPA authority to collect data and information necessary
to enforce standards established under Section 112.

     Certain records and reports are necessary to enable the
Administrator to  (1) identify sources subject to the standards
and  (2) ensure that the standards, which are based on  "MACT",
maximum achievable control technology, are being achieved.

     (b)  Use/Users of the Data.

     The  information will be used by Agency enforcement personnel
to:  (1)  identify sources subject to the standards;  (2) identify
the  control methodology being applied; and  (3) ensure  that the
emission  control devices are being properly operated and
maintained on a continuous basis.

     In addition, records and reports are  necessary to enable  EPA
to identify plants that may not be  in compliance  with  the
standards.  Based on  reported information,  EPA can decide  which
plants  should be  inspected and what  records or processes  should
be inspected  at the plants.  The records that plants maintain
would  indicate to EPA whether plant  personnel are operating and
maintaining control equipment properly.

3.   The  Respondents  and the  Information Requested.
                  i
      (a)   Respondents/SIC  Codes.

     Respondents  are  owners  or  operators  of HAP-emitting  chemical
 production processes  that  are used  to produce  any of  the
 approximately 400 listed SOCMI  chemicals.   Most  of the processes
 are  classified  in the four-digit  Standard  Industrial
 Classification  (SIC)  Codes  2869  for Industrial  Organic Chemicals
 and  2865  for  Cyclic  Organic  Crudes  and  Intermediates.   However,
 not  all processes classified in these two  SIC codes would be
 regulated by  this proposal.

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     (b)   Information Requested.

          (i)   Data items.   Attachment 1, Source Data and
     Information Requirements,  summarizes the recordkeeping and
     reporting requirements.

          (ii) Respondent Activities.  The respondent activities
     required by the standards are shown in the first column of
     Tables la and Ib, which are introduced in Section 6(a).

4.   The Information Collected—Agency Activities, Collection
     Methodology, and Information Management.

     (a)   Agency Activities.

     A list of Agency activities is provided in Table 2,
introduced in Section 6(c).

     (b)   Collection Methodology and Management.

     Information contained  in the one-time-only reports  will be
entered into the Aerometric Information  Retrieval System (AIRS)
Facility Subsystem  (AFS) maintained and  operated by EPA's  Office
of Air Quality Planning and Standards  (OAQPS) .  Data obtained
during periodic visits by Agency personnel from records
maintained by the respondents will be  tabulated and published  for
internal EPA use in compliance and enforcement programs.

     (c)  Small Entity Flexibility.

     Minimizing the information collection burden for all  sizes
of organizations is a continuing effort  on EPA's part.   The EPA
has reduced the recordkeeping and reporting  requirements to
include only the information needed  by EPA to determine
compliance with the standards.

     The burden to respondents has been  minimized by requiring
the collection and reporting of information  which is clearly
essential to  ensure that sources comply  with the  standards.

      (d)  Collection  Schedule.


     Collection of data will begin after promulgation of the
rule, scheduled for February 1994.


     The schedule  for the  submission of  the  five  types  of reports
required by Subpart G,  (1)  Initial Notification,  (2)
Implementation Plan,  (3) Notification of Compliance  Status, (4)
Periodic Reports,  and (5)  other reports, is  detailed below.

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     The Initial Notification is due 120 days after the date of
promulgation for existing sources.   For new sources, it is due
180 days before commencement of construction or reconstruction,
or 90 days after promulgation of Subpart G, whichever is later.

     Existing sources must submit the Implementation Plan at
different times for emission points included in averages and
emission points not included in averages.  The Implementation
Plan for emission points included in the average would be due  18
months prior to the date of compliance.  The Implementation Plan
for emission points not included in an emissions average would be
due 12 months prior to the date of compliance.  For new sources,
Implementation Plans would be submitted with the Notification  of
Compliance Status.  An Implementation Plan would be required only
for sources that have not yet submitted an operating permit
application.

     The Notification of Compliance Status would be submitted  150
days after the source's compliance date for both new and existing
sources.

     Generally, periodic Reports would be  submitted semiannually.
However, there are two exceptions.  Quarterly  reports must  be
submitted for all points included  in an emissions  average.   In
addition, if monitoring results show that  the  parameter values
for an  emission point are outside  the  established  range for more
than l  percent of the operating time in a  reporting period,  or
the monitoring system is out  of service  for  more than  5 percent
of the  time, the regulatory  authority  may  request  that the  owner
or operator  submit quarterly  reports for that  emission point.
After  1 year,  semiannual reporting can be  resumed,  unless  the
regulatory  authority requests continuation of  quarterly reports.

     Other  reports would be  submitted  as required  by  the
provisions  for  each kind of  emission point.   The due  date  for
these  kinds of  reports  is tied to  the  event that precipitated the
report itself.   Examples of  these  special  reports  include
requests for extensions  of  repair, notification of scheduled
 inspections for  storage  vessel and wastewater management  units,
process changes,  and  startup, shutdown,  and malfunctions.

      Subparts  H and  I,  the  equipment leak  standards,  would
 require the submittal  of an initial report and semiannual reports
 of leak detection and  repair experiences and any changes  to the
 processes,  monitoring  frequency and/or initiation  of a quality
 improvement program.   The  schedule for submission  of these
 reports is  detailed  below.

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     For existing sources, the owner or operator would be
required to submit the initial report within 90 days after the
applicability date of the standard.  The standard establishes a
staggered implementation scheme with 5 groups of applicability
dates.  The standard would apply to the first group of processes
6 months after promulgation.  Thereafter, the standard would
apply to another group every 3 months until all processes are
implementing the program.  For new sources, the initial report
shall be submitted with the application for construction, as
under Subpart G.

     Every 6 months after the initial report, a report must be
submitted that summarizes the monitoring results from the leak
detection and repair program and provides a notification of
initiation of monthly monitoring or implementation of a quality
improvement program, if applicable.

5.   Nonduplication, Consultations/ and Other Collection
     Criteria.

      (a)  Nonduplication.

     A  search of EPA's existing standards  and ongoing ICR's
revealed no duplication of  information-gathering efforts.
However, certain reports  required  by  State  or local  agencies  may
duplicate information required by  the standards.   In such  cases,
a  copy  of the report submitted to  the State or  local agency  can
be provided to  the  Administrator in  lieu  of the report  required
by the  standards.

      (b)  Consultations.

      Consultations  with  numerous representatives of  the chemical
 industry, environmental  organizations,  and state/local  air
pollution control agencies  were conducted throughout the rule
 development.  Table 3 provides  a list of some  of the persons
 consulted.  The standard was  also  discussed at  meetings of the
 National Air  Pollution  Control  Techniques Advisory Committee
 (NAPCTAC) held  in January and November of 1991. A 90-day public
 comment period  was  provided after  proposal, during which all
 affected parties, were given the opportunity to  comment  on the
 proposed rule,  'in  addition,  a  30-day public comment period was
 provided after  supplemental notice on the proposed General
 Provisions  impacts  on the HON,  and certain Emissions Averaging
 policy  considerations.   All received comments  were considered and
 some reflected  in the development  of the final  rule.

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     (c)  Effects of "Less Frequent Collection.

     If the relevant information were collected less frequently,
the EPA would not be reasonably assured that a source  is  in
compliance with the standards.  In addition, EPA's.authority to
take administrative action would be significantly reduced;
Section 113 (d) of the CAA limits the assessment of administrative
penalties to violations which occur no more than 12 months before
initiation of the administrative proceeding.  Since
administrative proceedings are less costly and require use of
fewer resources than judicial proceedings, both EPA and the
regulated community benefit from preservation of EPA's
administrative powers.

     (d)  General Guidelines.

     Except for some equipment leaks provisions  (Subparts H  and
I) which only require 2-year retention, this  rule  requires that
facility owners or operators retain records for a  period  of
5 years, which exceeds the 3-year  retention period contained in
the guidelines in 5 CFR  1320.6.  The 5-year records  retention
period  is consistent with the provisions  of the  soon-to-be final
General Provisions of 40 CFR Part  63,  and with the 5-year records
retention requirement in the operating permit program under
Title V of the clean Air Act.

      (e)  Confidentiality and  Sensitive Questions.

           (i)  Confidentiality.   Information  obtained by EPA is
      safeguarded  according to  the Agency  policies set forth in
      Title  40, Chapter  1, Part 2,  Subpart B,  Confidentiality of
      Business Information.   See 40 CFR 2; 41  FR 36902, September
      1, 1976; amended by 43  FR 3999,  September 8,  1978; 43 FR
      42251,  September 28,  1978;  44 FR 17674,  March 23, 1979.
      Even where  the Agency  has determined that information
      received from a "person"  in response to an Information
      Collection  Request (ICR)  is eligible for confidential
      treatment under 40 CFR Part 2,  Subpart B,  the Agency may
      nonetheless disclose the information if it is "relevant in
      any proceeding" under  the statute [42 U.S.C. Section 7414
      (C) ; 40 CFR^2.301  (g)].   The information collection complies
      with the Privacy Act of 1974 and Office of Management and
      Budget  (OMB) Circular 108.

           (ii) Sensitive Questions.  Information to be reported
      consists of emission data .and other information  that are not
      of a sensitive nature.   No sensitive personal or proprietary
      data are being collected,.

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6.    Estimating Burden and Cost of the Collection.

     (a)   Estimating Respondent Burden.

     The existing source annual burden estimates for reporting
and recordkeeping are presented in Table la.  The new source
annual burden estimates for reporting and recordkeeping are
presented in Table ib.  These estimates are shown separately
since the technical hours for new sources must include compliance
at startup and periodic records burdens in addition to pre-
compliance requirements.  Generally, with the exceptions  of new
sources and some equipment leaks provisions, periodic reports and
recordkeeping requirements begin after the compliance date, which
is three years from promulgation.

     In addition 'to Tables la and Ib, an extract of the equipment
leaks standards  (Subparts H and I) contribution to the overall
existing source annual burden estimates for reporting and
recordkeeping is presented in Table  4.  This is to highlight the
burden which can be directly attributed to the equipment  leaks
standards  (Subparts H and I) during  the first three years after
promulgation.  The equipment leaks standards were developed
through regulatory negotiation.

     Information collection requirements include  one-time-only
reports and periodic  reports.  The burden estimates for  the  one-
time only  reports are treated/considered as average annual
burdens by dividing the  cumulative three year total technical
hour estimate by three before including it  in column  (c),
"technical hours per  year per source."

     The estimates of total technical-hours per  year  per source
and the number  of activities per  respondent per  year  listed  in
each table are  based  upon experience with similar information
collection requirements  in  SOCMI  NSPS and the number  of  emission
points  in  each  source.

      (b)   Estimating  Respondent  Costs.

     The  information  collection  activities  for  the first three
years  for  sources subject to the standards  are  presented in
Tables  la  and  Ib.  To stay  consistent with  the  control cost
estimates, labor rates  and  associated costs are based on the 1989
Comprehensive  Assessment and  Information  Rule (CAIR)  economic
analysis,  and  estimated  hourly  rates are  as follows:   Technical
at $33,  management  at $49,  and  clerical at  $15.   The total burden
costs  may  be  converted  to 1992  CAIR rates by multiply the
technical  hours by  $49.0/hour  (this includes assumed managerial
and  clerical  cost considerations).   However,  any conversions to
1992  CAIR  rates should  not  be  used to compare with control costs,
which  are  estimated  in  1989 dollars.

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     It is important to note that an average was taken of costs
covering a period of three years for reporting and recordkeeping
to a typical source.  Therefore, total recurrent annual burden
hours would be as indicated in Table la for existing sources and
Table ib for new sources.

     (c)  Estimating Aaencv Burden and Cost.

     Because the information collection requirements were
developed as an incidental part of standards development, no
costs can be attributed to the development of the information
collection requirements.

     Because reporting and recordkeeping requirements on the part
or the respondents are required under Section 112 of the Clean
Air Act, no operational costs will be incurred by the Federal
Government.  Publication and distribution of the information are
part of the AFS operated and maintained by OAQPS, with the result
that no Federal costs can be directly attributed to the ICR.

     Examination of records to be maintained by the respondents
will occur incidentally as part of the periodic inspection of
sources that is part of EPA's overall compliance and enforcement
program and, therefore, is not attributable to the ICR.  The only
costs that the Federal Government will incur are user costs
associated with the analysis of the reported information, as
presented in Table 2.  Labor rates and associated costs are based
on the CAIR economic analysis, and estimated hourly rates are as
follows:  technical at $33, management at $49, and clerical at
v .L^ •

     (d)  Bottom Line Burden Hours and Costs/Master Tables.

     .   . (il  The simple collection.  The bottom line respondent
     burden hours and costs, presented in Tables la and ibT are
     fa:C?1!£ed b? addin9 person-hours per year down each column
     S«f, t;^hnica1' managerial, and clerical staff, and by adding
     down the cost column.  The estimated total nationwide burden
     iour^n   St 3 ?SarS °f the rUle is an estimated 2,127,710
     185 o™ ^^ I1'850'180 technical, 92,510 managerial and

     dollars    rhOUrS) ^ * ^ °f 68'364*37 th°USand
                                8

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          (xi) The Aaencv Tally.  The bottom line Agency  burden
     hours and costs, presented in Table 2, are calculated  as  in
     the respondent table, by adding person-hours per  year  down
     each column for technical, managerial, and clerical  staff
     and by adding down the cost column.  In this case, the total
     cost is the sum of the total salary cost and the  total
     travel expenses for tests attended.  The estimated total
     hours and costs in the first 3 years of the rule  are 23 188
     hours per year (20,162 technical, 1,009 managerial,  and
      e    clerical hours) at a cost of 760.37 thousand dollars
        ,        The complex collect inn.  This section  does not
     apply since this is a simple collection.

     (e)   Reasons for Change in Burden.


     This  section does not apply because this is a new
collection.

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1
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  Table 3. Persons Consulted on the Reporting and Recordkeeping
             Requirements in the Rule Development

David Driessen      Natural Resources
                  Defense Council         (202) 783-7800

Larry Goodheart    Chevron Corp.           (510)242-4145

David Gustafson    DOW Chemical USA     (517) 636-2953

Joe Hovious     •   Union Carbide           (203)794-5183

All Khan           Indiana Air Pollution
                  Control                 (219) 391-8297

Karen Olsen        Texas Air Pollution
                  Control  Board            (512) 451-5711

Gus Von Bodungen Louisiana Department of
                  Environmental Quality     (504) 394-5374

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                                     Attachment  1
                    SOURCE DATA AND INFORMATION REQUIREMENTS
Information  Requirements
                                                                 Citation
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NOTIFICATION

      Notification of construction or reconstruction

  •  "  Notification of anticipated date of initial startup

      Notification of actual date of initial startup

      Notification of modification



REPORTING - INITIAL

      Initial report requirements


      Reporting of operating parameter levels


      Statement of compliance or noncompliance



REPORTING - SEMIANNUAL  £ QUARTERLY

      Exceedances of parameter boundaries established  during
      the most recent performance test


      Any change  in  equipment or process operation that
      increases emission  levels above  requirements of  the
      standard

      Written report of performance tests



 RECORDKEEPING

      Record of  data measured  during each performance test
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       Record of periods of operation during which the
       performance boundaries esdtablished during the most
       recent performance tests are exceeded

       Records of Monthly visual inspections


       Records of Annual visual inspections
63.151,  63.182

63.151,  63.182

63.151,  63.182

63.118,  63.122, 63.130,
63.146,  63.151, 63.152,
63.182
63.117, 63.122, 63.129,
63.146, 63.151, 63.182

63.118, 63.122, 63.129,
63.146, 63.151, 63.182

63.151, 63.152, 63.182
 63.105,  63.118,  63.122,
 63.130,  63.146,  63.148,
 63.151,  63.152,  63.182

 63.118,  63.122,  63.130,
 63.146,  63.151,  63.152,
 63.182

 63.117,  63.122,  63.129,
 63.146,  63.151,  63.152,
 63.182
 63.117,  63.118,  63.123,
 63.129,  63.130,  63.147,
 63.148,  63.151,  63.152,
 63.181

 63.118,  63.123,  63.130,
 63.147,  63.148,  63.J.51,
 63.152

 63.118,  63.147,  63.147,
 63.181

 63.123,  63.147,  63.148,
 63.181

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                                      Attachment 2
             Assumptions and Item Descriptions for Tables 1a, 1b and  4

Assumptions are:

       (A) that there are 371 existing sources with a 5%  increase (new sources) in the first three
years after promulgation. The  5% increase (new sources) is expected to be new expansion at
existing facilities, as opposed to new facilities altogether, but given to possibility that this growth
could all occur as new facilities, this table assumes the startup of 18  new facility startups in the
first three years.  Since new facilities must be in compliance at startup, the general periodic
recordkeeping and reporting burdens are included, which accounts for the difference in the
technical hours per source.
       (B) that the average representative source, new and existing,  will consist of the following
points of burden:
              20 parameters to monitor at control devices throughout the facility
              10 affected storage tanks of various capacities
              3 affected major wastewater streams
              4 affected transfer rack operations
              1 overall leak detection and  repair program for 2,000 points
              1 emissions averaging program that involves 10 emission points
              1 facility wide inventory  of emission points. Group 1 and Group 2
        (C) that there are 5% (.05) managerial and 10% (.10) clerical hours required for every
technical hour.
        (D) that  some activities necessary to generate reports involve creating records in the
process, and that these activities are assumed to be reports activities alone, to avoid double
counting these as records activities as well. Therefore, only items 8  and 9 are considered  records
burdens directly.

Item Descriptions:

        (a) Average Hours per  Activity is back calculated by dividing  (b) into (c). Since the
activities within each burden category can  vary significantly, it is too inaccurate to assume an
average to use to calculate (c).  Estimated activity technical hours are summarized to obtain (c)
first, then back calculate for (a)  with an estimated (b).
        (b) Estimated Number of Activities per year per source represents the assumed typical
number of separate activities a source may encounter during one year. This number may vary
from facility to facility depending on consolidation of activities, collocated readings, etc. Since so
much variability exists, it important to note that this is our best guess at an average facility
 experience.  This number was only used to back calculate (a).
        (c) Technical Hours per year  per source is the actual best estimate of the burden for each
 burden item.  The three year separate activity burdens were divided  by three, where appropriate,
 and then summarized to include in this column.  The technical hours  for new sources is higher
 because some periodic compliance reports and  records are required at startup.  Existing sources
 do not encounter these reports and record burdens for three years after promulgation.
        (d) Estimated Number of Existing and New Sources reflect the number given in
 assumption (A), above.
        (e) Estimated Technical Hours per year  is the product of  (c) and (d).
        (fj Estimated Managerial Hours per year is 5% of (e).
        (g) Estimated Clerical Hours per year is 10% of (e).

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                               Attachment 2 (continued)
              Assumptions and Item Descriptions for Tables  1a and 2b


       (h) Estimated Annual COST in sThousands per year is the total cost of technical,
managerial and clerical hours and overhead using 1989 CAIR rates using this formula:


              (H* x $33/hour» + (Hm x $49/hour) + (Hc x $15/hourl  -= (h)
                             1,000


              Where:
                     H1 is (el, or technical hours
                     Hm is (f), or managerial hours, and
                     Hc is (g), clerical hours


       1} Read Rule and Instructions are the activities, less training, which involve
comprehending the  provisions in the standard and understanding how they apply to the
respective points at a facility.
       2) Plan Activities represents such burdens as design, redesign, scheduling as  well as
drafting the implementation plan, and selecting methods of compliance.
       3) Training represents the portion (assumed 40%) of activities from 1) Read Rule and
instruction which an average facility would elect to provide class room instruction for.  The
standard does not require specific training itself.
       4) Create. Test, Research & Development are the activities involving testing, retesting,
establishing operating range for parameters and analyzing point by point applicability. Monitor
related refit, calibration and maintenance activities  are also included under this heading.
       5) Gather Information.  Monitor and Inspect  are the  activities involving physical inspections
of equipment, collection of monitored data and other related activities.
       6) Process/Compile & Review are the activities that involve analysis of the information
collected for accuracy,  compliance and appropriate reports and records required  as a result.
       7) Complete Reports represents the activities normally  associated with filling out forms.
Since the standard  requires no standard forms, these activities relate to the preparing of formal
reports and cover letters as appropriate.
       8) Record/Disclose are activities which are solely recordkeeping which occur once the
appropriate report information has been extracted (see assumption (D)) above.  These activities
involve software translation, duplication or archival processes normally associated with data
management and storage common to this industry.
       9) Store/File are again activities which are solely recordkeeping which occur  once the
 appropriate report information has been extracted (see assumption (D) above).  These activities
 involve the management life cycle of records, from the time they are filed and boxed up, to the
 time they are disposed.
                         \

 TOTAL BURDEN AND COST is the sum of each of the columns (ej, (f), (g) and (h).

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                                     Attachment 3
                   Assumptions and  Item Descriptions for Table 2

Assumptions are the same as attachment 2, and:

       (A) that EPA personnel would attend 10% of the  performance tests. Performance tests
are required only for new sources in the first 3 years after promulgation. If the 18 new source
equivalents are considered to have 20 parameters each from 8 control devices (2.5 parameters
per control), this would mean the equivalent of 144 tests (8 x 18), approximately. Its important
to note, however, that EPA attendance is dependent upon EPA available resources, and not the
number of tests.
       (B) that 20% of the initial tests must be repeated due to failure of initial test.
       (C) that all existing and new sources must submit an initial report within 120 of
promulgation and an implementation plan or permit application within 12 or 18 months of the
compliance date. There are about 370 plant sites. The  new sources are most likely to be
collocated within existing plants and be included in those existing source reports.
       ID) that semiannual reports of results from equipment leak detection and repair program
are required by the equipment leak standard. Sources are required to comply with the  equipment
leak standard by 6 months after promulgation.
       (E) that travel expenses equal:
                  (2 people/trip)(17 trips)($400 travel/trip + $50 per diem/trip)

Item Descriptions:

        (a) Average Hours per Activity are estimates of the specific activities and are the basis for
estimating the overall burden (unlike tables la, Ib and 4).
        (b) Number of Activities per year represents the  number of reports expected to be
reviewed and other related activities during the course of the year.  Under the performance test
headings, these numbers are based upon assumptions (A) and (B), above.  For one time reports,
the total number of reports expected over the three year period was divided by three to get an
annual average incorporating assumption (C), above.
        (c) Estimated Technical Hours per year is the product of (a) and (b).
        (d) Estimated Managerial Hours per year is 5% of (c).
        (e) Estimated Clerical Hours per year is 10% of (c).
        (f) Estimated Annual Cost in ^Thousands per year is the total cost of technical,
managerial and clerical hours and overhead using  1989  CAIR rates using this formula:

               (HT x $33/hour) + (Hm x $49/hour)-MHC  x  $15/hour)  =  (h)
                             1.000

               Where: '
                      H*  is  (e), or technical hours
                      Hm is (f), or managerial hours, and
                      Hc is (g), clerical hours

 PERFORMANCE TESTS:
        1) Initial represents the activities during EPA  attendance at an initial performance test.
        2) Repeat represents the same activities as 1) Initial, except for a repeat performance test.

 LITIGATION: Represents the cost of litigating an average of three case per year.

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                               Attachment 3 (continued)
                   Assumptions and Item Descriptions for Table 2

REPORTS REVIEW:
       1) Initial represents the EPA review of all initial reports received.
       2) Implementation Plan or Permit Applications represents the EPA review of all
implementation plans, or permit applications if submitted in lieu of an implementation plan.
       3) Compliance Status represents compliance status verification by the EPA for the
portions of the standard which a source must comply with before the compliance date (see
assumption (D) above).
       4) Review equipment leak monitoring represents the review and screening of periodic
reports received as a result of the equipment leaks standard.
       5) Notification of construction/reconstruction represents the EPA review of this
notification from new sources.
       6) Notification of anticipated startup represents the EPA review of this notification from
new sources.
       ?) Notification of actual startup represents the EPA review of this notification from new
sources.
       8) Notification of performance test represents the EPA review of this notification from
new sources.
       9) Review of test results represents the EPA review of performance test results for new
sources.
       10) Review periodic reports represents the EPA review of periodic reports for new
sources, only. Generally, periodic reports are not  required from existing sources until after the
compliance date, which is 3 years after promulgation, except for equipment leaks which is
included under 4), above.

TOTAL BURDEN AND COST is the sum of each of the columns (e), (f), (g) and |h).

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       ATTACHMENT  6


DETAILED COST INFORMATION

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Equipment Leak Costs


Faeiliy
Butyl Rubber
BH-1
Capial Initial
Cost* Monitoring11
($)

(11,452
Epichlorohydrin Rubber
EPI-1
Ethylene- Propy
EPR-1
EPR-2
EPR-3
EPR-4
EPR-5

$442,763
tone Rubber
$81 .1 40
$116.746
$654.224
$760,418
$413.800
$2.035.334
Halobutyl Rubber
HBR-1
Hypalon'
HYP-1
Neoprene
NEO-1
NEO-2
NEO-3

$157.804

$0

$78,420
$2,454
$54.273
$135,147
Nitrite-Butadiene Latex
NBL-1
NBL-2
NBL-3

$20,845
$37,834
$11.061
$70,740
Nitrite-Butadiene Rubber
NBR-1
NBR-2
NBR-3
NBR-4

$64,465
$107,370
$70.138
$133.932
$375.914
<$)

$23,283

$0
SO
$0
$2.204
$0
s&
$2.204

$0

$0

$0
$0
SO-
SO

$0
$0
S515
$515

$0
$5.200
$3.062
SO.
$8.261
Polybutadiene/Styrene Butadiene
Rubber by Solution*
SBR/PBRS-1
SBR/PBRS-2
SBR/PBRS-3
SBR/PBRS-4
SBR/PBRS-5

$377.404
$4,010
$510,716
$535,364
$580.577
$2,017,080
Polysurfide Rubber
PSR-1
$0
Styrene— Butadiene Latex*
SBL-1
SBL-2
SBL-3
SBL-4
SBL-5
SBL-6
SBL-7
SBL-6
SBL-8
SBL-10
SBL-11
SBL-12
SBL-13
SBL-14
SBL-15

$22.117
$4,060
$02,647
$77.888
$0
$17,431
$8.387
$24.237
$42,380
$86,177
$133,027
$6,442
$53.202
$60,631
$11.116
$640.740

$0
$1.247
$4.380
$0
$a
$5,627

$0

$0
$202
$517
$0
$0
$0
$0
$0
$1,133
$2,363
$2,834
$107
$1,448
$0
S340
$0,034
Styrene— Butadiene Rubber by Emulsior
SBRE-1
SBRE-2
SBRE-3
SBRE-4


$0
$0
$0
SS_
$0
$5,806,964
$0
$0
$0
$£
$0
$48,023
Direct1

$370,818

$20.044
$21 .1 82
$27.131
$126.417
$177,001
$06.160
$448,800

$100.020

$0

$30,501
$123
$14.288
$54,002

$14.704
$23,612
$13.207
$51.522

$2,612
$84.536
$33,038
$59.302
$180.388


$35.750
$36,460
$80,064
$54,677
$59.256
$267.117

$0

$6,028
$6,845
$27,098
$14,638
$2,106
$5.520
$6,353
$21 .003
$17,543
$36.458
$41,292
$2,002
$22,383
$6,670
$5.230
$223,068
I
$0
$0
$0
$£
$0
$1,716,680



Annual Cost ($/yr)
Indirect"

$3,088

$158,011
$18,726
$51 ,705
$302,853
$428,340
$231.532
$1,123.245

$02,311

$0

$34.508
$408
$29.128
$64,224

$6,387
$10,305
$4.880
$30.272

$13,532
$50,401
$32.381
$63.475
$159.788


$78.052
$2.051
$295,477
$304,208
$330.076
$1,009,863

$0

$6,424
$1.178
$50,809
$47,003
$0
$3,720
$1,052
$12,180
$10,705
$41 ,1 00
$63,053
$3,284
$25.208
$32,087
$5.544
$315,416

$0
$0
$0
Sft
$0
$2,956,219
Ree Cred*

$2.011

$1.187
$282
$1.314
$2,376
$3.008
$2.161
$10.131

$2.311

$0

$623
$10
$317
$050

$161
$171
SZL
$403

$260
$1,400
$378
$1.486
$3,614


$1.320
$218
$1,081
$1,347
$1.460
$6.325

$0

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$66
$505
$166
$20
$72
$60
$137
$308
$634
$489
$50
$391
$132
ssa
$3.290

$0
$0
$0
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$0
$31 ,1 31
Total

$370,004

$177.760
$30.626
$77.612
$516.805
$602,243
$325.530
$1.561,015

$100.028

$0

$73,566
$610
$43.100
$117.276

$20,030
$42,746
$17.716
$81 ,302

$15.884
$133,446
$65,041
$121.290
$336.561


$112.401
$38.203
$374,460
$357,538
$387.872
$1.270.655

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$7,058
$77,412
$62,375
$2,086
$0,177
$8,245
$33,046
$37.030
$77.013
$103,856
$6.226
$47,200
$30,525
$10.685
$535,186

$0
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$0
$4,641 ,776
HAP EmiMton
Reduction'
(Mfl/yr)

283.3

110.6
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132.3
230.3
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217.7
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232.8

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-------
                                  TECHNICAL REPORT DATA
                             (Please read Instructions on reverse before completing)
1. REPORT NO.
  EPA-453/R-95-005a
                                                                 3. RECIPIENT'S ACCESSION NO.
4. TITLE AND SUBTITLE
  Hazardous Air Pollutant Emissions from Process Units
  in the Elastomers Manufacturing Industry— Supplementary
  Information Document for Proposed Standards
                5. REPORT DATE
                   May 1995
                6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)
                                                                 8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
   U.S. Environmental Protection Agency
   Office of Air Quality Planning and Standards
   Emission Standards Division (Mail Drop 13)
   Research Triangle Park, NC 27711
                                                                  10. PROGRAM ELEMENT NO.
                 11. CONTRACT/GRANTNO.

                    68-D1-0019
 12. SPONSORING AGENCY NAME AND ADDRESS

   Director
   Office of Air Quality Planning and Standards
   Office of Air and Radiation
   U.S. Environmental Protection Agency
   Research Triangle Park, NC  27711
                                                                  13. TYPE OF REPORT AND PERIOD COVERED
                 14. SPONSORING AGENCY CODE

                    EPA/200/04
 15. SUPPLEMENTARY NOTES
 16. ABSTRACT
   This document contains technical memoranda that provide rationale and information used to develop
 the Polymers and Resins Group I Elastomers and Synthetic Rubbers proposal package.  The memoranda
 included in this document provide detailed background information for the Basis and Purpose Document
 for the proposed standards (EPA-453/R-95-005a). The memoranda address industy characterization,
 baseline emissions, subcategorization, MACT floors and regulatory alternatives, the potential for new
 sources, and the estimated regulatory alternative impacts.
 17.
                                     KEY WORDS AND DOCUMENT ANALYSIS
                   DESCRIPTORS
                                                 b. IDENTIFIERS/OPEN ENDED TERMS
                                                                                     c. COSATI Field/Group
   Air Pollution
   Pollution Control
   Hazardous Air Pollutants
Air Pollution Control
Elastomers Manufacturing Industry
 18. DISTRIBUTION STATEMENT

   Release Unlimited
19. SECURITY CLASS (Repon)
   Unclassified
21. NO. OF PAGES
      296
                                                 20. SECURITY CLASS (Page)
                                                    Unclassified
                                    22. PRICE
EPA Form 2220-1 (Rev. 4-77)  PREVIOUS EDITION IS OBSOLETE

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