Ill. Admin. Code tit. 8, § 900.703
a) The level of surety is determined by the following formula:
Level of Surety = (V x CF) + EC
where:
| V | = | Volume of the lagoon as constructed or modified, in cubic feet, including the freeboard volume |
| CF | = | Cost factor determined pursuant to subsection (b) of this Section |
| EC | = | Engineering contingency determined under subsection (c) of this Section |
b) The cost factor is obtained from the following: