Ill. Admin. Code tit. 35, § 845.290
5) Installation of the final cover system.
b) The CQA program must meet the following requirements:
3) The CQA officer must certify the following, when applicable:
K) CCR stabilization; and
5) The CQA officer must be present to provide supervision and assume responsibility for performing all inspections of the following activities, when applicable:
A) The reasons for his or her absence;