Could your family
        be affected?

       One company in
  Minnesota reviewed its
       paint and coating
 operations to determine
why extra paint stripping
       was needed.  By
 improving their painting
 and coating processes,
    burn-off of racks and
  reject parts decreased
by 20 percent and saved
  over $17,000 annually.
     Minnesota Technical
      Assistance Program
  The Paint and Coating
   Manufacturing Sector
    partners with EPA to
 assess opportunities for
improving environmental
     performance while
     reducing regulatory
              U.S. EPA
           Reducing  Air Pollution from:
  Paint and Coating  Stripping  Operations
Why should my paint stripping
operation prevent air pollution?
  People who are exposed to air toxics
at sufficient concentrations, for sufficient
durations, may increase their chances of
getting cancer or experiencing other
serious health effects, such as
reproductive problems, birth defects, and
aggravated asthma.
  Pollution prevention safeguards the
health of your employees, customers,
and families by using materials,
processes, or practices that can reduce or
eliminate air pollution at the source. For
example, using abrasive blasting with
proper particle pollution (dust) controls
instead of chemical strippers reduces
worker exposure but creates more waste.
  Pollution prevention practices may
also save money on waste disposal,
solvent usage, and the cost of air
pollution controls.
  You may already be regulated by
federal, state, local, and Tribal agencies
and may already voluntarily implement
pollution prevention practices. These
practices can go beyond compliance and
further minimize impacts on human
health and the environment.

Why should I be concerned about air
pollution from my paint and coating
stripping operation?
  Solvents in chemical paint strippers
   can release volatile organic
   compounds (VOC) and some toxic
   air pollutants. Chemicals in these
   substances can also react in the air to
   form ground-level ozone (smog),
   which has been linked to a number of
   respiratory effects.
  Methylene chloride is found in many
   chemical paint strippers. While federal,
   state, local, and Tribal regulations limit
   the amount of emissions from paint and
   coating stripping operations, dangerous
   releases of methylene chloride can occur
   if a paint and coating stripping operation
   is not in compliance with regulations.
  Lead, chromium and cadmium are
   metals  that may be generated as particle
   pollution (dust) during abrasive paint
   removal or mechanical paint stripping.
   Breathing dust can cause respiratory
   problems and other harmful health

How can I reduce air pollution from my
paint and coating stripping operation?

Evaluate Painting and Coating Processes
  Assess your painting and coating
   processes to determine what is causing
   the need to strip and repaint. Improperly
   cleaned or dried parts, faulty equipment,
   or improper handling may damage a
   product and make it necessary to strip
   and repaint.
Use Chemical Strippers without
Methylene Chloride
  Use strippers, such as dibastic ether, that
   do not contain chemicals that produce
   toxic air pollutants.
  Use aqueous "hot" strippers.
  Use other solvent "cold" strippers.
  While hot and cold stripping are less
   toxic than using methylene chloride, use
   caution when implementing them.
                                A facility that repaints 30- and 55-gallon drums for reuse switched from
                                 using a hot caustic paint remover to using a mechanical paint removal
                                system of metal and nylon brushes.  The net savings was $35,000 a year,
                                including $6,000 a year from not needing to pur chase sodium hydroxide.
                                                                    Solvent Alternatives Guide

                              Paint and Coating Stripping Operations
Consider Mechanical Methods
  Rub small areas of non-detailed surfaces with a brush
   made of wire, animal hair, plastic, or synthetic
   materials that have been impregnated with abrasive
  Protect worker health and safety by using respirators
   as needed.

Implement Abrasive Stripping Techniques
  Tumbling is a stripping method in which parts are
   placed in a mixer and tumbled with stones or other
   abrasive material.
  Plastic medium blasting is a paint and coating
   stripping method that uses nontoxic plastic media to
   remove paint and coatings from parts. Plastic
   blasting media can also be recycled and reused until
   the particles are too small to be effective.
  Wheat starch can be used for blasting. Wheat starch
   blasting media are made from renewable agricultural
   products, which reduces nonrenewable resource
  Sodium bicarbonate can be used for paint and
   coating stripping by mixing it with water and
   shooting the mixture at the part to be stripped. The
   water controls dust and cools the part being stripped.
  Investigate other abrasive paint stripping methods,
   including carbon dioxide pellet cryogenic blasting,
   high-pressure water blasting, and medium-pressure
   water blasting.
  Protect worker health and safety by using respirators
   as needed.

Use Heat or Cold to Remove Paint
  Burn-off ovens use high temperatures to burn paint
   off a surface. Organic paint volatilizes into carbon
   dioxide and water. Inorganic pigments may need to
   be scraped off.
  Immerse parts in a molten salt bath. This method also
   volatilizes organics in coatings  into carbon dioxide
   and water. Inorganic pigments remain on the part and
   need to be scraped off.
  Use fluidized  sand beds. Heated sand or other
   granulated material vaporizes the organics in the
   coating and gently removes inorganic residue from
   the part.
  Flash lamps and lasers are new technologies.
   Focused light from these two sources is used to heat
   the coating and decompose it.
  Cryogenic paint stripping freezes the coating until it
   cracks and can be mechanically removed from the
Control Dust when Using Abrasive Technologies
  Plastic blasting and wheat starch blasting can generate
   paint chips that may contain metals such as cadmium
   and lead.
  Plastic media blasting can create dust that is
   flammable. Ensure that the dust from plastic  media
   blasting does not reach levels where combustion can
  Protect your workers by using respirators as needed.

How do I choose which paint and coating stripping
technology to use?
   Choosing the appropriate paint and coating removal
technology to use requires a consideration of many factors
such as the location, size, and composition of the object to
be stripped.
   The size and location of the object may restrict the type
of technology that can be used. For example, racks used in
painting and coating operations may be too large to move
into a chamber for thermal stripping.
   The composition of the object to be stripped  may limit
the kinds of the  stripping technology that can be used as
well. For instance, some metals may be susceptible to
cracking when plastic medium blasting is used.  Wheat
starch blasting may be preferable.

What else can I do to reduce air pollution?
  Your community may already have groups working for
cleaner air. Your expertise and knowledge can be very
helpful to these groups.
  Many pollution prevention offices offer free on-site
assessments for interested businesses. A list of these small
business assistance programs can be found at
www.epa.gov/smallbusiness. This site provides
information about assistance and technical help,
environmental experts, environmental regulations and
laws, funding, and cost-saving opportunities.
  Also, sponsor employee awards for good ideas, great
efforts, and dedication to pollution prevention. For
example, you could provide a cash award for workers who
implement cost-saving work practices.


 Could your family
       be affected?

         An agricultural
implement manufacturer
  in Wisconsin switched
  from stripping rejected
   parts in a hot sodium
 hydroxide bath to  using
  plastic media blasting.

    A. Hot Bath Method
     Annual  amount of
      hazardous waste
     generated: 19,000

         Annual cost of
      hazardous waste
     disposal: $36,000
       B. Plastic Media
       Blasting Method
  Cost of plastic media:

  Capital cost for plastic
    media blasting unit:

         Annual cost of
      hazardous waste
 disposal plastic media:

         Net annual
  savings:  $32.000
     Solvent Alternatives
                                       OWNER/OPERATOR INFORMATION SHEET
                                               Paint and Coating Stripping Operations
  National Paint and Coatings Association: www.paint.org, (202) 462-6272

  Paints and Coatings Resource Center: www.painteenter.org

  EPA Sector Strategies Program for the Paint and Coating Sector: www.epa.gov/
   sector s/paintcoatings/in dex. html

  Small Businesses: www.epa.gov/smallbusiness

  Community-Based Projects: www.epa.gov/air/toxicair/community.html

Pollution Prevention Techniques
  U.S. EPA Guide to Cleaner Technologies: www.p2pays.org/ref/02/01048.pdf

  Reducing waste and hazardous materials: www.mntap.umn.edu/paint/56-

  Pacific Northwest Pollution Prevention Research Center: www.pprc. org/pprc/rpd/

Stripping Alternatives
   Solvent Alternatives Guide: www.sage.rti.org
   Safer stripping and cleaning materials: www.mntap.umn.edu/paint/55-
    SaferStripping. htm

Toxicity of Chemical Paint Strippers
  Paint stripper suppliers and vendors

  Integrated Risk Information System (IRIS): www.epa.gov/iris

  Air Toxics Health Effects Notebooks: www.epa.gov/ttn/atw/hapindex.html

An aviation company installed a closed, plastic bead-blast paint stripper
     system to replace chemical stripping using methylene chloride.
    Installation costs were $18,000, and the payback period based on
reduced waste-disposal costs alone was estimated at 3.6 years. Overall,
 the technology is relatively inexpensive and can easily be transferred to
                 other industries and small companies.
                                  Pacific Northwest Pollution Prevention Research