Wis. Admin. Code Department of Natural Resources § NR 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, BOD5, 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
BOD5, 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 BOD5
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.
Notes
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