Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 560 - DESIGN CRITERIA FOR FIELD APPLICATION OF LIVESTOCK WASTE
Subpart B - DESIGN CRITERIA
Section 560.202 - Method of Application

Surface application may be used when the land slope is no greater than 5% or when the yearly average soil loss is less than 5 tons per acre (regardless of slope) as determined by the Universal Soil Loss Equation (see Appendix B). Injection or surface application with immediate incorporation should be used when the land slope is greater than 5% and the yearly average soil loss is greater than 5 tons/acre. However, even at land slopes less than 5%, soil losses and associated pollution may reach an unacceptable level.