INTERNATIONAL CLEANER PRODUCTION INFORMATION CLEARINGHOUSE

CASE STUDY # 142

1.   Headline:  Substitution of less toxic raw materials in the
     painting of mobile Street Sweepers extends material usage.

2.   Background:  See below.

3.   Cleaner Production Principle:  Material substitution

4.   Description of Cleaner Production Application:  A
     formulation change to eliminate photoreactive solvents in
     a primer used in painting operations reduces VOC emissions
     by 50%.  A substitute machine coolant, with a longer shelf
     life, reduces material usage and the volume of spent
     coolants sent off-site for recovery.  Effort to increase
     employee awareness has reduced the amount of waste xylene
     requiring off-site incineration.

     Material/Energy Balance and Substitution

     FEEDSTOCKS: Coolants, chemicals, paints, solvents (xylene)
     WASTES: VOC emissions, coolant waste, spent xylene

     MEDIUM: Gaseous, liquids

5.   Economics:

     CAPITAL COST: Not reported

     OPERATION/MAINTENANCE: 0

     MONTHS TO RECOVER: Not reported

6.   Advantages:

     DISPOSAL & FEEDSTOCK: VOC emissions - $100,000 saved in
     construction of facility to reduce the emissions. Machine
     coolant - $14,400/yr in material and disposal costs.
     Xylene - $3,800/yr in material and disposal costs

     FEEDSTOCK REDUCTION: 75% reduction in machine coolant, and
     reduced xylene requirements

     WASTE PRODUCTION: VOC emissions reduced by 50%, spent
     xylene sent off-site reduced by 1300 gallons/yr,

     IMPACT: Significant reduction in VOC emissions and in
     hazardous waste generation has been achieved through
     material substitutions, chemical reformulations, and
     improved employee awareness.

7.   Constraints:  No information provided.

8.   Contact and Citation:  "Case Summaries of Waste Reduction
     by Industries in the Southeast", Schecter, Roger N., Hunt,
     Gary, July, 1989, Page 50.

9.   Keywords:  United States, USA, mobile street sweeper,
     painting, material substitution, solvent, VOC, coolant,
     xylene, SIC 3711.

10.  Reviewer's Comments:  This case study part of a core
     collection of case studies from North Carolina, USA and
     was originally abstracted for the US Environmental
     Protection Agency's Pollution Prevention Information
     Clearinghouse.  It underwent a UNEP IE funded technical
     review in 1994 for quality and completeness.  It was
     edited for the ICPIC diskette in July 1995.


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