The person undertaking remediation may, in their sole discretion, terminate the agreement as provided by the terms of the agreement and by giving fifteen days advance written notice of termination. Only those costs incurred or obligated by the director before notice of termination of the agreement are recoverable, if the agreement is terminated. The termination of the agreement does not affect any right the director may have under any other law to recover costs. The person undertaking the remediation must pay the division's costs associated with the voluntary remediation within thirty-one days after receiving notice that the costs are due and owing. The director may bring an action in Kanawha County circuit court or in the circuit court in the county wherein the property is situated to recover the amount owed to the division and reasonable legal expenses.