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ISCA Licensed Soil Classifiers (link)
Illinois Private Sewage Disposal Code (link)
Illinois Private Sewage Mound Code (link)
Surface Water Treatment Code (link)
Water Well and Pump Installation Contractors License Code (link)
Illinois Private Sewage Disposal Code and Act (link)
Frequently Asked Questions on EPA's NPDES General Permit for New and Replacement Surface Discharging Systems in Illinois (PDF)