35 Ill. Adm. Code 391.405
Water Treatment Plant Sludge
Section 391
Section 391.405 Water
Treatment Plant Sludge
a) Lime sludge shall be applied at rates calculated using soil
type, soil pH, and type of crops grown as determined using APPENDIX E.
b) Water treatment plant sludge, other than lime sludge, may be
land applied provided the applicant can demonstrate, through field testing on
plots of up to 1 acre in size, that the sludge applied will not have an adverse
impact on the land for agricultural purposes.
c) Water treatment plant sludge application projects must comply
with Section 391.301; 391.302; 391.402 (a), (b), (c), (d), (f), (h), (j);
391.403; 391.404 (a), (b), (c), (f), (g); and 391.420.