"Combined Sewer Service Area" means a specific geographical drainage area served by a combined sewer system. Areas served by separate sewer systems which enter the combined system are not included. Undeveloped areas within a combined sewer service area may be included in that area if deemed appropriate by the Agency under the guidelines in 35 Ill. Adm. Code 306.102.
Ill. Admin. Code tit. 35, § 301.260
Amended in R88-1 at 13 Ill. Reg. 5984, effective April 18, 1989