Section 206.09. Wastewater monitoring requirements.

 

(1)  Discharges to land disposal systems, except for large scale soil absorption systems, shall be monitored for total daily flow and at least monthly for total dissolved solids, chlorides, BOD 5 , organic nitrogen, ammonia-nitrogen and nitrate plus nitrite nitrogen. For spray irrigation systems, fecal coliform bacteria monitoring may be included on a case-by-case basis. For large scale soil absorption systems, effluent shall be monitored for total daily flow, and at least quarterly for BOD 5 , organic nitrogen, ammonia nitrogen, total dissolved solids and chlorides. The frequency of flow monitoring and sampling and the type of samples shall be as specified in the WPDES.

(2)  Influent to all treatment facilities subject to the monitoring provisions of sub. (1) shall be monitored for total daily flow, and at least monthly for BOD 5 and organic nitrogen and ammonia-nitrogen. The frequency of flow monitoring and sampling and the type of samples shall be as specified in the WPDES permit. Any flow bypassing the treatment facility to the land disposal system shall be monitored at a minimum of once per bypass event for the parameters for which effluent monitoring is required or as determined by the department. Influent monitoring may be required on a case-by-case basis for large scale soil absorption systems.

(3)  Monitoring for other pollutants parameters may be required on a case-by-case basis dependent on waste characteristics and their potential for groundwater contamination.

(4)  Unless otherwise specified in the WPDES permit for a land disposal system:

(a) The procedures for measuring flow and taking samples of discharges shall be those set forth in ch. NR 218 .

(b) The methods of analysis for substances contained in discharges shall be those set forth in ch. NR 219 .

(c) Sample analysis used for permit reporting shall be performed by a laboratory certified under ch. NR 149 .

History: Cr. Register, March, 1985, No. 351 , eff. 4-1-85; r. and recr. (1) and (2), cr. (4) (c), Register, November, 1990, No. 419 , eff. 12-1-90.