(1) Ecology shall review and approve plans. The authority or authorized party will pay ecology's plan review and approval costs.

(2) Plan review and approval includes ecology's costs for:

(a) Review;

(b) Approval; and

(c) Update and plan revision review and approval.

(3) Ecology shall base the plan review fee on actual costs as follows:

Plan Review Fee = Direct Costs + Indirect Costs

Where:

(a) Direct costs include ecology staff hourly time and other costs related to accomplishing the activities identified in subsection (2) of this section for each plan. Direct staff costs are the costs of hours worked, including salaries and benefits required by law to be paid to, or on behalf of, employees. Other direct costs are costs incurred as a direct result of ecology staff working on the plan including, for example, costs of: Travel related to plan review, printing and publishing of documents about the plan, and other work, contracted or otherwise, associated with plan review and approval, as necessary.

(b) Indirect costs are those general management and support costs of ecology. Ecology applies them using the agency's approved federal indirect cost rate.

(4) Plan review fee invoicing and payment. Invoices are generally sent about the last week of the month, for the previous month's activity. Payment is expected within thirty days after the date that ecology has issued the invoice. Ecology will grant final approval of plans and post approved plans on ecology's website, when all outstanding invoices have been paid by the authority or authorized party for the activities delineated in subsection (2) of this section.