Ways of implementing plastic paint

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					                                                                                                                     9/12/2005
                                     OWNER/OPERATOR INFORMATION SHEET

                                   Reducing Air Pollution from:
                              Paint and Coating Stripping Operations
                            Why should my paint stripping                     • Methylene chloride is found in many
                            operation prevent air pollution?                    chemical paint strippers. While federal,
                               People who are exposed to air toxics             state, local, and Tribal regulations limit
                            at sufficient concentrations, for sufficient        the amount of emissions from paint and
 Could your family          durations, may increase their chances of            coating stripping operations, dangerous
      be affected?          getting cancer or experiencing other                releases of methylene chloride can occur
                            serious health effects, such as                     if a paint and coating stripping operation
         One company in     reproductive problems, birth defects, and           is not in compliance with regulations.
  Minnesota reviewed its    aggravated asthma.                                • Lead, chromium and cadmium are
                               Pollution prevention safeguards the              metals that may be generated as particle
       paint and coating
                            health of your employees, customers,                pollution (dust) during abrasive paint
 operations to determine
                            and families by using materials,                    removal or mechanical paint stripping.
why extra paint stripping   processes, or practices that can reduce or          Breathing dust can cause respiratory
        was needed. By      eliminate air pollution at the source. For          problems and other harmful health
 improving their painting   example, using abrasive blasting with               effects.
 and coating processes,     proper particle pollution (dust) controls
    burn-off of racks and   instead of chemical strippers reduces             How can I reduce air pollution from my
  reject parts decreased    worker exposure but creates more waste.           paint and coating stripping operation?
by 20 percent and saved        Pollution prevention practices may
  over $17,000 annually.    also save money on waste disposal,                Evaluate Painting and Coating Processes
                            solvent usage, and the cost of air                • Assess your painting and coating
    — Minnesota Technical   pollution controls.
      Assistance Program
                                                                                processes to determine what is causing
                               You may already be regulated by                  the need to strip and repaint. Improperly
                            federal, state, local, and Tribal agencies          cleaned or dried parts, faulty equipment,
                            and may already voluntarily implement               or improper handling may damage a
  The Paint and Coating     pollution prevention practices. These               product and make it necessary to strip
   Manufacturing Sector     practices can go beyond compliance and              and repaint.
                            further minimize impacts on human
    partners with EPA to
                            health and the environment.                       Use Chemical Strippers without
 assess opportunities for
                                                                              Methylene Chloride
improving environmental     Why should I be concerned about air               • Use strippers, such as dibastic ether, that
      performance while     pollution from my paint and coating                  do not contain chemicals that produce
     reducing regulatory    stripping operation?                                 toxic air pollutants.
                 burden.    • Solvents in chemical paint strippers            • Use aqueous “hot” strippers.
              — U.S. EPA        can release volatile organic                  • Use other solvent “cold” strippers.
                                compounds (VOC) and some toxic                • While hot and cold stripping are less
                                air pollutants. Chemicals in these               toxic than using methylene chloride, use
                                substances can also react in the air to          caution when implementing them.
                                form ground-level ozone (smog),
                                which has been linked to a number of
                                respiratory effects.


                             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 purchase sodium hydroxide.
                                                                           — Solvent Alternatives Guide
                       OWNER/OPERATOR INFORMATION SHEET                                                                9/12/2005
                                 Paint and Coating Stripping Operations

Consider Mechanical Methods                                Control Dust when Using Abrasive Technologies
• Rub small areas of non-detailed surfaces with a brush    • Plastic blasting and wheat starch blasting can generate
  made of wire, animal hair, plastic, or synthetic           paint chips that may contain metals such as cadmium
  materials that have been impregnated with abrasive         and lead.
  grit.                                                    • Plastic media blasting can create dust that is
• Protect worker health and safety by using respirators      flammable. Ensure that the dust from plastic media
  as needed.                                                 blasting does not reach levels where combustion can
                                                             occur.
Implement Abrasive Stripping Techniques                    • Protect your workers by using respirators as needed.
• Tumbling is a stripping method in which parts are
  placed in a mixer and tumbled with stones or other       How do I choose which paint and coating stripping
  abrasive material.                                       technology to use?
• Plastic medium blasting is a paint and coating               Choosing the appropriate paint and coating removal
  stripping method that uses nontoxic plastic media to     technology to use requires a consideration of many factors
  remove paint and coatings from parts. Plastic            such as the location, size, and composition of the object to
  blasting media can also be recycled and reused until     be stripped.
  the particles are too small to be effective.                 The size and location of the object may restrict the type
• Wheat starch can be used for blasting. Wheat starch      of technology that can be used. For example, racks used in
  blasting media are made from renewable agricultural      painting and coating operations may be too large to move
  products, which reduces nonrenewable resource            into a chamber for thermal stripping.
  consumption.                                                 The composition of the object to be stripped may limit
• Sodium bicarbonate can be used for paint and             the kinds of the stripping technology that can be used as
  coating stripping by mixing it with water and            well. For instance, some metals may be susceptible to
  shooting the mixture at the part to be stripped. The     cracking when plastic medium blasting is used. Wheat
  water controls dust and cools the part being stripped.   starch blasting may be preferable.
• Investigate other abrasive paint stripping methods,
  including carbon dioxide pellet cryogenic blasting,      What else can I do to reduce air pollution?
  high-pressure water blasting, and medium-pressure          Your community may already have groups working for
  water blasting.                                          cleaner air. Your expertise and knowledge can be very
• Protect worker health and safety by using respirators    helpful to these groups.
  as needed.                                                 Many pollution prevention offices offer free on-site
                                                           assessments for interested businesses. A list of these small
Use Heat or Cold to Remove Paint                           business assistance programs can be found at
• Burn-off ovens use high temperatures to burn paint       www.epa.gov/smallbusiness. This site provides
   off a surface. Organic paint volatilizes into carbon    information about assistance and technical help,
   dioxide and water. Inorganic pigments may need to       environmental experts, environmental regulations and
   be scraped off.                                         laws, funding, and cost-saving opportunities.
                                                             Also, sponsor employee awards for good ideas, great
• Immerse parts in a molten salt bath. This method also
                                                           efforts, and dedication to pollution prevention. For
   volatilizes organics in coatings into carbon dioxide
                                                           example, you could provide a cash award for workers who
   and water. Inorganic pigments remain on the part and
                                                           implement cost-saving work practices.
   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
   surface.




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                                                                                                                       9/12/2005
                                      OWNER/OPERATOR INFORMATION SHEET
                                                Paint and Coating Stripping Operations




 Could your family                                           Resources
      be affected?

           An agricultural    • National Paint and Coatings Association: www.paint.org, (202) 462-6272
implement manufacturer
                              • Paints and Coatings Resource Center: www.paintcenter.org
  in Wisconsin switched
  from stripping rejected     • EPA Sector Strategies Program for the Paint and Coating Sector: www.epa.gov/
    parts in a hot sodium       sectors/paintcoatings/index.html
 hydroxide bath to using
  plastic media blasting.     • Small Businesses: www.epa.gov/smallbusiness

                              • Community-Based Projects: www.epa.gov/air/toxicair/community.html
        Comparison:
    A. Hot Bath Method        Pollution Prevention Techniques
      Annual amount of        • U.S. EPA Guide to Cleaner Technologies: www.p2pays.org/ref/02/01048.pdf
       hazardous waste
                              • Reducing waste and hazardous materials: www.mntap.umn.edu/paint/56-
     generated: 19,000
                                PaintStrip.htm
                pounds
                              • Pacific Northwest Pollution Prevention Research Center: www.pprc.org/pprc/rpd/
          Annual cost of        fedfund/epa/epastd/evalbead.html
       hazardous waste
                              Stripping Alternatives
      disposal: $36,000
                              • Solvent Alternatives Guide: www.sage.rti.org

                              •   Safer stripping and cleaning materials: www.mntap.umn.edu/paint/55-
                                  SaferStripping.htm
       B. Plastic Media
       Blasting Method        Toxicity of Chemical Paint Strippers
                              • Paint stripper suppliers and vendors
  Cost of plastic media:
                  $8,000      • Integrated Risk Information System (IRIS): www.epa.gov/iris

  Capital cost for plastic    • Air Toxics Health Effects Notebooks: www.epa.gov/ttn/atw/hapindex.html
    media blasting unit:
                  $8,000

         Annual cost of       An aviation company installed a closed, plastic bead-blast paint stripper
      hazardous waste              system to replace chemical stripping using methylene chloride.
 disposal plastic media:         Installation costs were $18,000, and the payback period based on
                              reduced waste-disposal costs alone was estimated at 3.6 years. Overall,
        Net annual            the technology is relatively inexpensive and can easily be transferred to
  savings: $32,000                             other industries and small companies.
                                                                       — Pacific Northwest Pollution Prevention Research
     — Solvent Alternatives
                                                                         Center
                     Guide




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Description: OWNER/OPERATOR INFORMATION SHEET Reducing Air Pollution from: Paint and Coating Stripping Operations Why should my paint stripping • Methylene chloride is found in many operation prevent air pollution? chemical paint strippers. While federal, People who are exposed to air toxics state, local, and Tribal regulations limit at sufficient concentrations, for sufficient the amount of emissions from paint and Could your family durations, may increase their chances of coating stripping operations, dangerous be affected? getting cancer or experiencing other releases of methylene chloride can occur serious health effects, such as if a paint and coating stripping operation One company in reproductive problems, birth defects, and is not in compliance with regulations. Minnesota reviewed its aggravated asthma.