letter to the department no later than 30 days after the review deadline outlined in subdivision (a), explaining that the program operator has reviewed the plan and determined that no revisions are needed. The department may disapprove the program operator’s determination within 30 days of receipt of that determination if the department concludes that the program operator cannot implement the objectives of this chapter without revising the stewardship plan. In the event the department disapproves the program operator’s determination, the program operator shall submit to the department a revised stewardship plan for review and approval in accordance with Section 42422.5. The program operator shall submit the revised plan pursuant to this subdivision within 90 days of receipt of the department’s disapproval.

to the Department of Toxic Substances Control prior to submission to the department pursuant to this section.