(1) The owner or operator shall reimburse the trust fund for all dollars expended, excluding legal defense costs, up to but not exceeding the following amounts: With respect to a heating tank — one hundred dollars ($100) per annum;
(2) With respect to a farm tank or residential tank — two thousand dollars ($2,000) per annum;
(3) With respect to an above ground storage tank or underground storage tank, as defined in section 41-4903, Idaho Code — ten thousand dollars ($10,000) per annum.
(4) Payments by the trust fund shall not be made contingent on prior payment of the reimbursement herein required.