What is "Clean Fill"?

This is taken from the DNR's website: http://dnr.wi.gov/files/pdf/pubs/wa/wa1280.pdf

Acceptable alternative materials Materials defined as clean fill and exempt from ch. NR 500 solid waste rules:

 Mine spoils (crushed stone, sand and overburden soils)

 Clean soil

 Brick

 Building stone

 Unpainted concrete (even if reinforced)

 Unpainted/untreated wood

 Broken pavement (even if it contains asphalt)

Materials defined as industrial byproducts and regulated under ch. NR 538 (beneficial use rules):

 Coal combustion ash and slag

 Foundry system sand

 Lime kiln dust

 Flue gas desulfurization waste Miscellaneous:

 Compost from municipal recycling programs

 Sediment from stormwater ponds

 Paper mill sludge

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