Section 811.857. Backwash wastewater from lime softening water treatment plants.  


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  • Filter backwash wastewater from lime softening water treatment plants shall be disposed of by any of the following methods:
    (1)  Returned to the inlet end of the plant in accordance with the requirements of s. NR 811.862 .
    (2)  Direct or controlled discharge to a sanitary sewer system may be allowed by the department if the discharge will not overload the facilities or adversely affect the wastewater treatment process.
    (3)  Discharge to surface water. Suspended solids shall be removed from the filter backwash wastewater before the filter backwash wastewater is discharged to surface water. This will require settling and possibly coagulation. Any discharge requires a WPDES Permit.
History: CR 09-073 : cr. Register November 2010 No. 659 , eff. 12-1-10.