United States              Office of Water (WH 550G)         EPA 570/9-9 1 -036M I
                    Environmental Protection                                January 1 992
                    Agency
v>EPA        Best Management Practices

                    For  Protecting  Ground  Water
                          For  Fabricated  Metal Industry
                      Facilities Using Shallow Industrial
                                 Waste  Disposal Wells
                        (Class V Well BMP Fact Sheet Number 2G)
                    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 minimiza-
                    tion 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 recommedations only
                    For more information, contact the person named below
                         The BMPs listed below apply to fabricated metal industry facilities. Fact Sheet
                         Number 2 in this series lists BMPs that are applicable to Industrial Disposal Wells
                         in general (including those used by fabricated metal industry facilities), particu-
                         larly for closure and alternative disposal.
                         Waste Minimization
                           • Standardize metalworking  fluids to the greatest extent possible
                           • Use high-quality metalworking fluid to minimize amount needed
                           • Recycle metalworking fluids through filtering,  skimming, coalescing, or other
                            methods
                           • Use deionized water in place of tap water to facilitate recycling
                           • Extend bath life and recover metals and additives through treatment
                            —  For example, use electrolytic dummying to remove excess copper
                            —  Other methods include high surface area  electrowinning/electrorefining,
                               ion exchange, ion transfer, evaporators, and reverse osmosis
                           • Rotate electroplating barrels over bath after immersion to allow them to drain
                           • Replace barrel plating with rack plating where possible to minimize "drag-out"
                    Note: These BMPs are adapted from a May 1991 EPA report titled, "Class V Well BMP Guidance - Phase I and
                    Phase II," and have been modified in response to comments by EPA Regions For a copy of the EPA report,
                    please contact the Underground Injection Control Branch of the Office of Ground Water and Drinking Water, US
                    EPA

                    For further information contact.

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