Wisconsin Requirements for Contaminated Sediment Management

The Wisconsin Department of Natural Resources (WDNR) has promulgated rules regulating the beneficial reuse of sediment removed from stormwater detention ponds (Chapter NR 528). These rules streamline the assessment and approval process for the reuse of dredged sediments, especially if not intended to be disposed of in a landfill.

WDNR rules establish management standards, risk assessment procedures and “ceiling” contaminant concentrations for sediments. The sediment contaminants regulated under NR 528 include several heavy metals (arsenic, cadmium, chromium, lead), pH and electrical conductivity.

The end-uses considered under the rule include:

Disposal in licensed landfill,
General fill,
Confined geotechnical fill,
Landspreading,
Dedicated sediment management sites, and
Small quantity, course grained sediment management

NR 528 defines the level of risk assessment, acceptance criteria and specific management practices required for the different end-uses. The designated sediment manager must assure that these requirements are met and provide the required documentation and reporting.

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