United States
Environmental Protection
Agency
Office of Air Quality
Planning and Standards
Research Triangle Park NC 27711
EPA-450/3-84-019
December 1984
Air
Procedures for
Certifying
Quantity of
Volatile Organic
Compounds
Emitted by Paint,
Coatings


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                                EPA-450/3-84-019
 Procedure for Certifying  Quantity of
Volatile Organic Compounds  Emitted
  By Paint, Ink,  and Other Coatings
            Emission Standards and Engineering Division
            U.S. ENVIRONMENTAL PROTECTION AGENCY
                 Office of Air and Radiation
            Office of Air Quality Planning and Standards
            Research Triangle Park, North Carolina 27711

                   December 1984

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This report has been reviewed by the Emission Standards and Engineering 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. Copies of this report are available through the
Library Services Office (MD-35), U.S. Environmental Protection Agency, Research Triangle  Park, N.C. 27711, or
from the National Technical Information Services, 5285 Port Royal Road, Springfield, Virginia 22161.

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                                PREFACE

     This manual was conceived as a way to provide  simple  step-by-step
instructions for certifying the quantity of volatile organic  compounds
(VOC) that will  be released by a coating.   It  has not turned  out that
way.  The guidance is here, but in spite of great diligence,  the
instructions remain imposing.

     The manual  was prepared for several  reasons.   First,  the coatings
industry, as represented by the National  Paint and  Coatings Association,
had requested a certification procedure which  would relieve their custom-
ers the expense of analysis.  Second,  the complexity of  the calculations
necessary to determine compliance, for example,  when dilution solvent is
added to a coating, continue to confound Federal, State  and Local enforce-
ment personnel.   Finally, results of a recent  review of  the Agency's
reference method for determining VOC reemphasized the importance of
analytical procedures to verify VOC content.

     In response to the results of the review  of the test  methods, this
manual reaffirms that Reference Method 24 or its constituent  methods
developed by the American Society for Testing  and Materials (ASTM),
are the procedures by which the VOC content of a coating will  be deter-
mined for compliance with Federal  regulations.   The earliest  guidance
was not so specific.  In 1977, the first report^, written  to  assist
States in developing regulations for sources of VOC emissions,  provided
recommendations for the maximum allowable VOC  content for  complying
coatings in a variety of industries.  These values  were  expressed in
mass of VOC per unit volume of coating.  In deriving the recommended
limitation, the VOC content of a coating was calculated  based  on the
solids content provided by the coating manufacturer.  The  Agency calcu-
lated the mass of VOC in the coating by assuming the VOC had  a  density
of 7.36 pounds per gallon.

     Solvent and VOC were used somewhat interchangebly even though it
was recognized that organics such as resin monomer, oligimers,  and
reaction by-products could be released by a coating during the cure.
There was no accepted analytical  method available for measuring the
total VOC which would be released by a coating.  The initial  guidance1
provided an analytical  method for use  only for air-dry coatings, those
where all VOC emissions would be expected to come as a result of evapor-
ation of solvent.  On a volume basis,  air dry  coatings constituted the
largest catagory of coatings then in use.

     The Agency subsequently developed a more  general analytical proce-
dure that could be used to determine the total  VOC  in a  coating.  On
October 3, 1980, the Agency published  "Reference Method  24 (RM-24) -
^Control of Volatile Organic Emissions  from Stationary Sources -
Volume II:   Surface Caoting of Cans,  Coils, Paper, Fabrics, Automobiles,
and Light-duty Trucks,  Document No.  EPA-450/2-77-008.

                                  111

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Determination of Volatile Matter Content, Density, Volume Solids,  and
Weight Solids of Surface Coatings," in the Federal Register (45 FR 65958)
For  the  first time the Agency formally specified an analytical  method
for  the  VOC content of those coatings that cure by chemical  reaction.
Even then, the announcement continued to allow the manufacturer's  formu-
lation to be used to calculate the VOC content but specified that  the
analytical technique, RM-24, would be the reference in any conflict
between  the two.

      During 1981 and 1982, as more State and Federal  regulations were
established, the demand for low-sol vent coatings began a  continuing
increase in the sales volume of reaction-cure coatings.  There  was some
concern  voiced by the industry in how appropriate the reference method
was  for  these type coatings.  To find out, the Agency began a review of
RM-24 to determine the effect of temperature and exposure time  on  the
indicated VOC "content".  It was concluded that the maximum effect of
those time-temperature combinations that were examined amounted to only
about a  10 percent variation.  Somewhat more surprising was that the
solvent  sometimes accounted for only 50 to 70 percent of  the total
VOC measured by the reference method.

     The obvious conclusion was that RM-24 is a better measure  of  the
total organics freed by a  coating than is the solvent.  This manual
implements a policy based  on that conclusion.   Certification of VOC
content  on the attached Data Sheets must be based on  an analysis using
RM-24.  No longer will  solvent content be permitted as  a  surrogate  for
VOC unless a showing is first made that its use is a  reasonable alter-
native or equivalent method of determining the VOC content  of that
particular coating.

     One final  comment.  Since VOC is not always synonomous  with solvent,
it follows that  the  amount of solids in  a coating cannot  be  obtained  by
subtracting the solvent from the total  volume of coating.   The  original
Federal  Register proposal  for RM-24, published on October 3,  1980, recom-
mended the American  Society of Test Materials test Number D2697 as  the
appropriate method of determining solids  content.  Subsequent comments
from the industry maintained that this test is unreliable.   As  a result,
when promulgated in  1980,  RM-24 specified that the solids content  of  a
coating can be obtained only from the manufacturer's  formulation of  the
coating.
                                    Dennis  Grumpier
                                    December  14,  1984

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                          TABLE OF CONTENTS

CHAPTER                                                          Page

         PREFACE	111

         GLOSSARY OF TERMS AND SYMBOLS	vi

   1     INTRODUCTION 	  1-1

   2     VOC CONTENT OF PAINT, INK, AND OTHER COATINGS
           "AS SUPPLIED" BY THE COATING MANUFACTURER  	  II-l

         2.1  VOC DATA SHEET FOR "AS SUPPLIED" COATINGS ....  11-2

         2.2  IMPLEMENTING INSTRUCTIONS	11-3

   3     VOC CONTENT OF PAINT, INK AND OTHER COATINGS
           "AS APPLIED" TO THE SUBSTRATE BY THE USER	I II-l

         3.1  VOC DATA SHEET FOR "AS APPLIED" COATINGS	II1-2

         3.2  IMPLEMENTING INSTRUCTIONS 	  III-4

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                            GLOSSARY  OF  TERMS

"As Applied"     the condition  of  a  coating  after  dilution by the user
                just prior to  application to the  substrate.

"As Supplied"    the condition  of  a  coating  before dilution, as sold
                and delivered  by  the  coating manufacturer to the user.

      (Dc)a     coating  density  "as applied"

      (Dc)s     coating  density,  "as  supplied"

      D(j        density  of dilution solvent

      D^       density  of organic  solvent/water  mixture

      Dw        density  of water  (8.33 Ib/gal)

      R,J        dilution solvent  ratio,  equals  the volume of VOC added
                per unit volume of  coating  "as  supplied"

      R^       equals the volume of  premixed water and VUG added per
                unit volume of coating "as  supplied"

      (Vn)a     Volume percent solids of coating  "as applied"

      ^n^s     Volume percent solids of coating  "as supplied"

      (VOC)a     VOC content of "as  applied" coatiny, expressed as mass
                of VOC per unit volume of coating less water or as mass
                of VuC per unit volume of solids

      (VOC)S     VOC content of "as  supplied" coating, expressed as mass
                of VOC per unit volume of coating less water or as mass
                of VOC per unit volume of solids

      (Vw)a     the water content,  in volume percent, of coating "as applied"

      (Vw),j     the water content,  in volume percent, of the dilution solvent
                added to the "as  supplied"  coating

      (Vw)s     the water content,  in volume percent, of the coating
                "as supplied"

      (W0)a     the organic volatile  content, in  weight percent, of the
                coating  "as applied"

      (W0)s     the organic volatile  content, in  weight percent, of the
                coating  "as supplied"

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(Wv)a     the weight  percent  of  total volatiles in the coating
          "as applied"
(Wv)s     the weight  percent  of  total volatiles in the coating
          "as supplied"
(Ww)a     the weight  percent  water  in the coating "as applied"
(Ww)d     the weight  percent  water  in the dilution solvent
(Ww)s     the weight  percent  water  in the coating "as supplied"
                           vn

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                            1.   INTRODUCTION

     This Manual  provides step-by-step instruction for preparation of two
data sheets developed by the Environmental  Protection Agency which may be
used by coating manufacturers and users to present information on the
quantity of volatile organic compounds* (VOC)  emitted from a coating.
One of the data sheets may be prepared by the  manufacturer of the coating;
the second would be used by the company that applies the coating to a
substrate.

      The first VOC data sheet, which would be prepared by the manufacturer,
provides information on the volatile organic content of a coating as it is
delivered to a customer.  This  is referred to  as the VOC content of the
coating "as supplied" (by the manufacturer to  the user).

     The second VOC data sheet, which would be prepared by the user or coater,
provides information on the quantity of volatile organic compounds present  as
the coating is used or applied  to the substrate and includes the effect
of any dilution solvent added before application.  This is referred to as the
VOC content of the coating "as  applied" (to the substrate).

     The coating user may submit, and the Agency enforcing a regulation may
accept, these data sheets as prima facie evidence of the actual  VOC content
of a coating.  The referee method for ultimate determination of compliance,
however, will continue to be the method specified in the applicable regula-
tion (for example, tPA Reference Method <:4 or  individual ASTM methods).
*Volatile Organic Compound (VOC) - Any organic compound which participates
 in atmospheric photochemical  reactions; that is,  any organic compound
 other than those which the Administrator designates as having negligible
 photochemical reactivity.  VOC may be measured by a reference method,
 an equivalent method, an alternative method, or by procedures specified
 under any regulation.

                                  1-1

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2.   VOC CONTENT OF PAINT,  INK AND OTHER COATINGS



    "AS SUPPLIED" BY THE COATING MANUFACTURER TO THE  USER
                       II-l

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             UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                              VOC DATA SHEET:
          PROPERTIES OF THE COATING "AS SUPPLIED" BY  THE  MANUFACTURER
Coating Manufacturer:
Coating Identification:
Batch Identification:	
Supplied To:	
Properties of the  coating as supplied! to the customer:
   A.   Coating  Density  (Dc)s :    _ Ib/gal      _ kg/1
         /~7 ASTM D147b        r~7 Other?
   B.   Total  Volatiles  (Wv)s :    _ Weight Percent
         /~T ASTM D2369        /  J Other?
   C.   Water Content:   1.  (Ww)s  _ Weight Percent
         /~7 ASTM D3792       l~f ASTM D4017       /~7 Other?
                       2.   (Vw)s  _ Volume Percent
         /~7  Calculated       f~7 Other?
   u.    Organic Volatiles  (w'0)s :  _ Weight Percent
   £.    Nonvolatiles Content (Vn)s :   _ Volume  Percent
   F.    VOC Content  (VOC)S:  1.  _ Ib/gal  coating  less water
                              or _ kg/1  coating  less water
                            2.  _ Ib/gal  solids
                              or _ kg/1  solids
Remarks: (use reverse  side)
iThe subscript "s"  denotes each value is for the coating  "as  supplied"
by the manufacturer.
^Explain the other  method used under "Remarks".
                            Signed:	Date	
                                    11-2

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2.2  IMPLEMENTING INSTRUCTIONS FOR THE VOC DATA SHEET  FOR  "AS  SUPPLIED"  COATINGS
     This DATA SHEET is normally completed by the coating  manufacturer and
provided to the user.l   It will  henceforth be referred to  as  the  "AS  SUPPLIED"
VOC UATA SHEET.

A.  The "as supplied" coating density,  (Dc)  2,  is determined  using
    "ASTM D1475 - Standard Test Method  for Density of Paint,  Lacquer,
    and Related Products."

B.  The weight percent of total  volatiles in a  coating,  (Wv)s,  is determined
    by "ASTM D2369 - 81 Standard Method for Volatile Content  of Coatings."
    drying conditions to be used are 110°C for  1  hour^.

C.  Water Content

    1.  The weight percent water, (Ww)s,  is  determined by  "ASTM D3792  -
        Standard Test Method for Water  Content  of Water-Reducible Paints
        by Direct Injection Into a Gas  Chromatograph," or  "ASTM D4017  -
        Standard Test Method for Water  in Paints  and Paint Materials  by
        the Karl Fischer Method."^>4 An  acceptable alternative to these
        procedures for purposes of preparing the  data sheet would be  to
        calculate the weight percent water from the manufacturer's coating
        formulation.
lEPA's Reference Method 24 (40 C.F.R.  Part 60,  App.  A),  contains  the
ASTM methods referenced in these instructions.

2The subscript "s" denotes those parameters of  a coating when  measured
in the "as supplied" condition, before dilution by  the  user.

3If the manufacturer believes a specified method does  not give results
that are representative of the actual  cure mechanism,  he may  petition the
enforcement authority for approval  of  an alternate  analytical  method.   Any
alternate method or alteration to the  methods and procedures  in these instruc-
tions or in any applicable regulation  would be  subject  to review  and approval
by the appropriate State and Federal enforcement agency.

^Volatile compounds classified by EPA  as having negligible photochemical
reactivity such as 1,1,1-trichloroethane and methylene  chloride,  etc.,  and
listed as exempt in the applicable Federal and  State VOC regulation should
be treated in the same manner as water.   The weight percent.of negligibly
reactive compounds in a coating should be determined from the  manufacturer's
formulation.  The volume percent can then be calculated using  equation  II-l
when the weight percent and density of the negligibly  reactive compounds are
substituted for those of water.  The weight and volume  percent can be used  in
Equations II-2 and 11-6, respectively, in place of  (Ww)s and  (Vw)s.

                                     II-3

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    2.  The water content, in volume percent,  (Vw)s,  can  be  calculated
        by the equation:
                (Vw)s
s,                                    II-l
                where Dw is the density of water,  8.33  Ibs/gal.

D.  The organic volatiles content, (W0)s,  i.e.,  the  VOC content
    expressed as a percent by weight,  is determined  by  the  following
    equation^:

                '  O'S = '  V'S ~   W'S                                    ii~d

    If the coating contains no water the weight  percent of  organic
    volatiles is equal  to the weight percent of  total volatiles.

    In other words:
                (Ww)s = 0 and

                (W0)s = (Wv)s                                           II-3

E.  The volume percent solids (nonvolatiles), (Vn)s,  should be derived
    from the coating formulation using the following  equation:

                        P
                (Vn)s - L   (Vn)s.                                      II-4


                where (Vn)S-denotes the volume percent  of each

                nonvolatile component in an "as  supplied" coating,
                and "p" is the number  of nonvolatile  components in
                that coating.  (Also see Footnote  1,  Pg. II-3.)
5The precision limit adjustments permitted  by Reference Method 24 for
experimentally determined mean Ww and Wv  values may be made only ^y
enforcement agencies for determination of compliance.  The adjustment
is not to be used for the purposes of completing  the  "AS SUPPLIED"
WDA~TA SHEET.
                                     11-4

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F.  The VOC content of the "as  supplied" coating (VOC)S can now be calculated
    and thereby expressed  in  terms used by most State or Federal  regulations.

    1.  The mass of VOC per unit volume of coating less water:

        a.   If the coating contains no water, the equation is calculated
            as follows:


                        •
        b.  If the coating  contains water, Equation 1 1-5 becomes:
                 (VOC)S  =
                     's
                          100%  -  (Vw)s
    2.   The VOC content may also  be calculated in terms of mass of VOC per
        unit volume  of  solids  (nonvolatiles).  For both solvent-borne and
        waterborne coatings, the  equation is:
                 (VOC)S  =
                          
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3.   VOC CONTENT OF PAINT, INK AND OTHER COATINGS



    "AS APPLIED" TO THE SUBSTRATE BY THE USER
                    III-l

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              UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                              VOC DATA SHEET:

            PROPERTIES OF THE COATING "AS APPLIED" TO THE SUBSTRATE
Coating Manufacturer:
Coating Identification:

Batch Identification:	

User:
User's Coating  Identification:
                            /~~J Other2
     	                 /~7 Other2

C.   Water Content:  1.  (Ww)a  	

     /7 ASTM  D3792
                            /~7 ASTM D4017    f~J Other?
                                                                  Ib/gal
Properties of  the  coating as applied1 by the User:

   A.   Coating  Density (Dc)a:   _ kg/1, or

        I~~J ASTM  D1475

   B.   Total  Volatiles (Wv)a:

        I~~J ASTM  D2369
                                                               Weight Percent
                                                               Weight Percent
                      2- (Vw)a 	

        /~7 Calculated      f~7 Other2

   D.    Weighted Average Density of the dilution  solvent (Dd) :

        /  7  ASTM D1475     /  7  Handbook     /  7  Formulation
                                                               Volume Percent
                                                                       Ib/gal
  (Continued  on  Reverse Side)
 iThe subscript "a"  denotes each value is for  the coating "as applied" to the
    substrate.
 2Explain the other  method used under "Remarks"  on  reverse side
      subscript "d"  denotes values are for the dilution solvent
                                    III-2

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      Dilution Solvent Ratio
F.   Organic Volatiles Content5 (WQ)a:

G.   Non-Volatiles Content (Vn)a:

H.   VOC Content (VOC)a:   1.   	
                            or
                          2.
                            or
                                            or
       gal  diluent
       (gal coating)s4


       liter diluent
       (liter coating)
                  Weight Percent

                 Volume Percent
Ib/gal of coating less water

kg/1 of coating less water

Ib/gal solids

kg/1 solids
REMARKS:
                         Signed:
               Date:
4The subscript "s" denotes values are  for  the  coating  "as supplied" by the
manufacturer.

5This terminology is used to be consistent with  Method 24.   It  refers to
all photochemically reactive organic compounds emitted frpm  the coating
including reactive by-products of the  cure reaction, exactly  the same
matter as indicated in Paragraph H,  i.e.,  volatile  organic compounds,
or VOC.

                                111-3

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3.2. IMPLEMENTING INSTRUCTIONS FOR THE VOC DATA SHEET FOR "AS APPLIED"  COATINGS

     This DATA SHEET, henceforth referred to as the "AS APPLIED"  VOC DATA
SHEET, is to be completed by the company which applies a coating.   It
provides information on the amount of volatile organic compounds  (VOC)  in
the coating "as applied" to the substrate by accounting for the quantity  of
diluent solvent added to a coating prior to application.  There are two
avenues available for the coater to certify the VOC content.   One  is to
analyze each diluted coating with the same method used to generate the  data
provided by the coating manufacturer on the "AS SUPPLIED" VOC DATA SHEET.
(See Chapter 2 of this Manual.) In this case begin with Step  A.1   The other
is to maintain adequate records of how much organic solvent is added to each
coating and use that information and the "AS SUPPLIED" VOC DATA SHEET2  to
calculate the VOC content "as applied." (The user may choose  to analyze an
"As Supplied" coating using Reference Method 24 and complete  the  "AS SUPPLIED"
VOC DATA SriEET rather than have the coating manufacturer complete  it.  The
volume percent solids, however, will necessarily continue to  be supplied  by
the coating manufacturer.) In this case begin with Step D.  If a  coating  is
diluted only with water or a solvent of negligible photochemical  reactivity,
skip Steps A through D below and proceed directly to t.  (Also see Footnote
4, Pg. III-5.)

A.  The "as applied" coating density, (D_)g2, is determined using  "ASTM U1475-
    Standard Test Method for Density of Paint, Lacquer, and Related Products."

B.  The weight percent of total volatiles in the coating, (Wv)a is determined
    by "ASTM U23fa9-81 Standard Method for Volatile Content of Coatings."
    The crying conditions to be used are 110°C for 1 hour^.
iEPA's Reference Method 24 (40 C.F.R.  Part 60,  App.  A),  contains  the
ASTM methods referenced in these instructions.
     subscript "a" denotes those parameters  of a  coating  in  the
"as applied" condition,  i.e.,  after dilution by the user.  The subscript
"s" denotes the parameters of  a coating in the "as  supplied" condition,
before dilution by the user.
    the manufacturer believes the specified method gives  results  that
are not representative of the VOC released during the  normal  cure,  he
may petition the enforcement authority for approval  of an. alternative
analytical method.   Any alternate method or alteration to the methods
and procedures in these instructions or in any  applicable regulation
would be subject to review and approval  by the  appropriate State  and/or
Federal enforcement agency.

                                   III-4

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C.  The water content is necessary only if the coating has  been diluted
    with a mixture of organic solvent and water. 4,5   if ^g  dilution
    solvent is 100 percent organic, or if the weight and volume percent
    water in the mixture is known, proceed directly to Step D.

    The weight percent water, (Ww)a, is determined by"ASTM U3792  -
    Standard Test Method for Water Content of Water-Reducible
    Paints by Direct Injection Into a Gas Chroma tograph," or  "ASTM D4017
    - Standard Test Method for Water in Paints arid Paint Materials by
    the Karl Fischer Method."  (Also see Footnote 3,  Pg.  III-4.)

    The water content, in volume percent, (Vw)a,  can be calculated by
    the equation:

                     - '"w'a "Ua                                    1II-1
                     '
              where Uw is the density of water,  8.33  Ib/gal.
^Volatile compounds classified by EPA as  having  negligible  photochemical
reactivity such as 1 ,1 ,1-trichloroethane  and methylene  chloride,  etc., and
listed as exempt in the applicable Federal  and State  VuC  regulation,  should
be treated in the same manner as water.   The weight percent of  negligibly
reactive compounds in the dilution solvent  must  be known  either from  the
coater's mixing records or the dilution  solvent  supplier's  formulation.
The volume percent can then be calculated using  Equations 1II-1  or  III-5
when the weight percent and density of the  negligibly reactive  organics
are substituted for those of water.  The  weight  and volume  percent  of
the negligibly reactive compounds can be  substituted  in all  equations
where the weight and volume percent water,  (Ww)  and (Vw),  respectively,
are used.
     precision limit adjustments permitted by  Reference Method 24 for
experimentally determined mean weight percent  water  and total volatiles,
Ww and Wv respectively,  may be made only  by enforcement agencies for
determination of compliance.   The adjustment is  not  to be used for  the
purposes of completing the "AS APPLIED" VuC UATA~3H'tET.
                                   III-5

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D.  If the dilution solvent consists of a single compound the density
    may be obtained from the literature.

    If the dilution solvent is a mixture of organic compounds, the
    density, Ddt>, can be determined analytically via AiiTM D1475, or
    an average density can be estimated from the solvent formulation
    as shown below.  This estimation assumes that volumes are additive.


              0   =   100%
               d     m   W,                                           I1I-2
        or

                          rn
                  =   !   E   VJUJ                                    IH-3
                     TUu% j=i

            where: Dj,  Wj, and Vj denote the density, weight percent,
            and volume percent of each solvent in the dilution solvent
            mixture and "m" is the number of organic solvents in the
            dilution solvent mixture.

    If the dilution solvent is a mixture of photochernically reactive
    organics and water, the coater must know the weight percent, (Ww)(j,
    or volume percent,  (V^^, of water from his mixing records or the
    supplier's formulation, or he must analytically determine the weight
    fraction of water in the dilution solvent using ASTM 03792 or Ab'fM
    U4017.  The density, U^, of the dilution solvent may then be deter-
    mined by analytically measuring the density of tiie organic solvent/
    water mixture, Dd , using AbTM U1475 and adjusting it for the water
    content using the following equation.  (See also Footnote 4, Pg. III-5.)
              D   = D '  "~"''   •••w'u-                                I1I-4
               d     d  L100% - (Vw)dJ

        Note:  If either the weight or volume percent water in the
        dilution solvent is known, the other can be calculated by the
        equation:

                             Dd                                       III-5
                w
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E.  The dilution solvent ratio,  Rd,  is defined as  the volume of
    photochemically reactive organic solvent,  (VOC),  added per unit
    volume of "as supplied" coating.  Stated mathematically,

    R    =   Volume photochemically  reactive dilution solvent added
     d                   Volume  of "as supplied" coating

    1.  If the "as supplied" coating is subsequently  diluted with
        water or a solvent which is  of negligible  photochemical
        reactivity, the VOC content  will  be unchanged from that reported
        on the "AS SUPPLIED" VUC DATA SHEET.  This should be reported  on
        the "AS APPLIED" VOC DATA SHEET by  entering "0" for the dilution
        solvent ratio, Rs - (Dc>a                                      in-b
                   (0 )—  (D )

        b.  When the dilution solvent is  a  mixture of water and
            photochemically reactive organic solvent, Equation II1-6
            may be expressed as:


              Rd  = -—:	;—rr
                      where:  R^ is the ratio of the  volume  of  water
                      and organic dilution solvent to the  volume  of  "as
                      supplied" coating to which it is added.   (Also  see
                      Footnote 4, Pg.  II1-5.)

        The dilution solvent  ratio, K
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F.  The organic volatile content (W0)a,  i.e.  the  VOC  content  expressed
    as a percent by weight of the diluted coating,  can  now  be calculated
    by either of two ways:

    1.  From analyses of the coating using the  following  equation:

              (W0)a ' 
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        (2).   If the coating  contains water the following equation
              must be used:

          (ynr). = JWQ>  tVa                                    111-14
              /a
                   101ft  -  (Yw)a
    b.   Using the VOC  content  of  the "as supplied" coating, (VOCS),
        the dilution  solvent ratio, and the density of the solvent,
        the equation  is:
          (VOC);
                 _
                   C(VOC)S  (100%  -  (Vw)s)/100%] + (RdDd)
          Where (VOC)S  in  this case must be in units of
          Ibs VOC/gal coating  less water.

2.  The VOC content may also be calculated in terms of mass of VOC
    per unit volume of  solids  (nonvolatiles) .

    a.   Using the  results  obtained by analyzing the coating with EPA
        Reference  Method 24 or its constituent ASTM  methods,
        the equation for both  solvent-borne and waterborne coatings,
        is:

          (VOC)a = "o     0'**                                    I"
    b.  Using dilution information and calculation procedures only,
        the equation  is:
                 _  E(voos  (ioo%-  (vw)s)/ioo%3 + (RdDd)          m_17
               a                 (vn)s/ioo%

          Where (VOC)S  in this case must be in units of
          Ibs VOC/gal coating less  water.
                              III-9

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                                   TECHNICAL REPORT DATA
                            (Please read Instructions On the reverse before completing)
1. REPORT NO.
  EPA 450/3-84-019
                              2.
                                                            3. RECIPIENT'S ACCESSION NO.
4. TITLE AND SUBTITLE
  Procedures  for Certifying Quantity of Volatile Organic
  Compounds Emitted by Paint,  Ink,  and Other Coatings
            5. REPORT DATE
                December  1984
            6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)
                                                            8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
  Office of Air Quality Planning  and Standards
  U. S. Environmental Protection  Agency (MD-13)
  Research  Triangle Park, NC  27711
                                                            10. PROGRAM ELEMENT NO.
            11. CONTRACT/GRANT NO.
12. SPONSORING AGENCY NAME AND ADDRESS
                                                            13. TYPE OF REPORT AND PERIOD COVERED
                                                            14. SPONSORING AGENCY CODE

                                                                      EPA/200/04
15. SUPPLEMENTARY NOTES
16. ABSTRACT
                 This manual  provides procedures by which firms may voluntarily
           certify the quantity of volatile organic  compounds which  will  be emitted
           by a paint, ink,  or  other coating.  Two data sheets are provided.  One
           is  to be used by  the manufacturer of the  coating,- the other  by the user.
           Analytical test methods and procedures  for preparing the  data sheets are
           included, as are  the equations and instructions necessary to convert the
           analytical results  into a format suitable for determining compliance with
           State or Federal  regulations.
17.
                                KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
                                               b.lDENTIFIERS/OPEN ENDED TERMS
                          c.  COSATI Field/Group
  Air Pollution
  Coatings
  Compliance  Calculations
  Pollution Control
  Reference Method  24
  Test Methods
  Volatile Organic  Compounds
Air Pollution  Control
13-B
18. DISTRIBUTION STATEMENT
                                               19. SECURITY CLASS (ThisReport/
                                                 Unclassified
                          21. NO. OF PAGES

                                 15
                                               20. SECURITY CLASS (Thispage)
                                                 Unclassified
                                                                          22. PRICE
EPA Form 2220-1 (Rev. 4-77)
                       PREVIOUS EDITION IS OBSOLETE

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                                                         INSTRUCTIONS

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                                                                                >
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       To be published in, Supersedes, Supplements, etc.

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   17.  KEY WORDS AND DOCUMENT ANALYSIS
       (a) DESCRIPTORS - Select from the Thesaurus of Engineering and Scientific Terms the proper authorized terms that identify the major
       concept of the research and are sufficiently specific and precise to be used as index entries for cataloging.

       (b) IDENTIFIERS AND OPEN-ENDED TERMS - Use identifiers for project names, code names, equipment designators, etc.  Use open-
       ended terms written in descriptor form for those subjects for which no descriptor exists.

       (c) COSATI FIELD GROUP - Field and group assignments are to be taken from the 1965 COSATI Subject Category List. Since the ma-
       jority of documents are multidisciplinary in nature, the Primary Field/Group assignment(s) will be specific discipline, area of human
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EPA Form 2220-1  (Rev. 4-77) (Reverse)

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