Section 114.56. Classification of wastewater treatment plants.

 

(1)  Each wastewater treatment plant shall be assigned a basic or advanced rating. An advanced wastewater treatment plant is one that meets any one of the following criteria:

(a) Is a mechanical plant with an annual average design flow greater than 1.0 MGD.

(b) Has a biochemical oxygen demand (BOD) limit of 10 mg/L or less.

(c) Has surface water limits for total phosphorus or total nitrogen and utilizes a biological nutrient removal process.

(d) Uses a tertiary phosphorus removal process to achieve ultralow phosphorus limits.

(e) Is a municipal treatment plant that receives wastewater from a major contributing industry.

(f) Is a municipal treatment plant that produces Class A biosolids.

(2)  Wastewater treatment plants that do not meet any of the criteria in s. NR 114.56 (1) shall be classified as a basic facility.

(3)  Wastewater treatment plants that utilize special or unique biological, physical, chemical, or other unique treatment methods shall have an operator certified in subclass U.

(4)  Thirteen wastewater treatment plant subclasses are established in Table 1.

Table 1

Wastewater Treatment Plant Categories and Subclasses - See PDF for table

History: CR 13-054 : cr. Register June 2014 No. 702 , eff. 7-1-15.