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Vehicle Service Facilities

All commercial car wash wastewater must be collected, treated, and then discharged to the sanitary sewer. Environmental Compliance staff require a minimum 1500-gallon clarifier to treat car wash wastewater. However, a larger size may be required depending on the number of cars being washed. Clarifiers must be completely pumped out at least once a year, sometimes more frequently if there is evidence of excessive oil and solids. For instructions on maintaining a clarifier and a list of pumpers known to work in the area, please refer to Best Environmental Management Practices for Vehicle Service Facilities.