Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 391 - DESIGN CRITERIA FOR SLUDGE APPLICATION ON LAND
Subpart E - SAMPLE COLLECTION AND ANALYSIS
Appendix F - General Buffer Area, Geological and Topographic Criteria for Sludge Application
SLUDGE APPLICATION METHOD |
|
Incorporation or Injection........................... |
20 ft. from occupied dwelling. 10 ft. from closet edge of traveled portion of public road or within fence. 200 ft. from surface water. |
Ridge and Furrow....................................... |
200 ft. from occupied dwelling. 200 ft. from closest edge of traveled portion of public road or within fence. 200 ft. from surface water. |
Dewatered material or Splash Plate to Land Surface............................................... |
200 ft. from occupied dwelling. 200 ft. from closest edge of traveled portion of primary and secondary public roads; or 10 ft. from closest edge public roads; or within fence. 200 ft. from surface water. |
Low Pressure Sprayers (<50 psi (as measured from outer boundary of spray).................................................... |
200 ft. from occupied dwelling. 200 ft. from closest edge of traveled portion of public road. 200 ft. from surface water, waterways or flood plains. Wind velocity <15 mph. |
High Pressure Sprayers (>50 psi) (as measured from outer boundary of spray).................................................. |
1000 ft. from occupied dwelling. 1000 ft. from closest edge of traveled portion of public road. 1000 ft. from surface water, waterways or flood plains. Wind velocity <15 mph. |
GEOLOGICAL CONSIDERATIONS |
|
Minimum Depth of Earth Cover to the Mean Annual Water Tale............................ |
10 ft. with rapid permeability (greater than 2.0 inches/hr) 5 ft. with moderate to slow permeability (less than 2.0 inches/hour) |
Distance from Potable Water Well............. |
150 ft. in all instances, however, if a water supply is located in a consolidated bedrock (such as limestone) or sinkhole area and is within one-fourth of a mile of the sludge application site, then 50 foot depth of non-sandy, non-gravelly unconsolidated material is needed for water supply protection |
TOPOGRAPHIC CONSIDERATIONS |
|
Maximum Slope.......................................... |
8% (incorporation)* |
5% (surface application)* |
|
Application to Waterways.......................... |
Not allowed |
Application in a flood plain having a flooding frequency more often than once every ten years........................... |
Only if approved by Agency after review of project. |
*May be exceeded under certain conditions. See discussion in Section 391.404.