United States Office of Water (WH 550G) EPA 570/9-91-036C
Environmental Protection January 1992
Aqency
&EPA Best Management Practices
For Protecting Ground Water
For Dry Cleaners Using
Shallow Industrial Waste
Disposal Wells
(Class V Well BMP Fact Sheet Number 2A)
EPA recognizes that certain industrial waste disposal practices using drainage wells may pose unacceptable
risks to Underground Sources of Drinking Water. These operations allow the discharge of various wastes to
a drainage system neither designed for nor capable of treating them. Accordingly, BMPs for Industrial
Disposal Wells focus on well closure and alternative disposal methods We have also included BMPs for
waste minimization to help facilities reduce waste disposal costs, regardless of the disposal method they use
In addition local, county, and State regulations may prohibit use of these wells Note these practices are
recommendations only. For more information, contact the person named below
The BMPs listed below apply to dry cleaners. Fact Sheet Number 2 in this
series lists BMPs that are applicable to Industrial Disposal Wells in general
(including those used by dry cleaners), particularly for closure and alternative
disposal.
Waste Minimization
• Use equipment with built-in distillation units or add such units to
existing equipment to extend the life of solvents and reduce still waste
volume
• Add carbon adsorption units, refrigeration/condensation units, or
azeotropic conditioning for solvent recovery (azeotropic conditioning
entails adding a substance to a mixture to facilitate distillation and
separation of individual components of the mixture)
• Add prewashing where possible to remove some dust and oils (this
increases solvent and filter cartridge life)
• Properly operate distillation units to minimize solvent content of still
bottoms
• Heat used filter cartridges in a closed container to vaporize and
capture excess solvent
• Open button traps and lint gaskets only long enough to clean
• Inspect and repair gaskets, seals, hoses, and couplings to minimize
solvent, vapor, and liquid loss
-------
r
United States Office of Water (WH 550G) EPA 570/9-91-036C
Environmental Protection January 1992
Agency
SEPA Best Management Practices
For Protecting Ground Water
For Dry Cleaners Using
Shallow Industrial Waste
Disposal Wells
(Class V Well BMP Fact Sheet Number 2A)
EPA recognizes that certain industrial waste disposal practices using drainage wells may pose unacceptable
risks to Underground Sources of Drinking Water. These operations allow the discharge of various wastes to
a drainage system neither designed for nor capable of treating them. Accordingly, BMPs for Industrial
Disposal Wells focus on well closure and alternative disposal methods We have also included BMPs for
waste minimization to help facilities reduce waste disposal costs, regardless of the disposal method they use
In addition local, county, and State regulations may prohibit use of these wells Note these practices are
recommendations only. For more information, contact the person named below
The BMPs listed below apply to dry cleaners. Fact Sheet Number 2 in this
series lists BMPs that are applicable to Industrial Disposal Wells in general
(including those used by dry cleaners), particularly for closure and alternative
disposal.
Waste Minimization
• Use equipment with built-in distillation units or add such units to
existing equipment to extend the life of solvents and reduce still waste
volume
• Add carbon adsorption units, refrigeration/condensation units, or
azeptropic conditioning for solvent recovery (azeotropic conditioning
entails adding a substance to a mixture to facilitate distillation and
separation of individual components of the mixture)
• Add prewashing where possible to remove some dust and oils (this
increases solvent and filter cartridge life)
• Properly operate distillation units to minimize solvent content of still
bottoms
• Heat used filter cartridges in a closed container to vaporize and
capture excess solvent
• Open button traps and lint gaskets only long enough to clean
• Inspect and repair gaskets, seals, hoses, and couplings to minimize
solvent, vapor, and liquid loss
------- |