The State Department shall conduct, at least once every two years, a detailed performance audit, which must include, but is not limited to, the child protective services and foster care programs of every local county office. The department shall use a sample size that will ensure the results of the audit to be within a ninety percent confidence level. The department shall prepare a full and detailed report of its findings and include any proposals to rectify any deficiencies noted. The State Department shall submit, within ninety calendar days of the completion of the county performance audit review, a copy of its final report to the Governor, Lieutenant Governor, members of the respective county legislative delegations, the Joint Legislative Committee on Children, and the County Advisory Board of Social Services. The final and all draft audit reports are public information and upon request must be provided to any member of the public within the time period set forth by the Freedom of Information Act. As public information, the State Department shall also submit two copies of the final report to the State Library and one copy of the final report to any public library within the county reviewed. The failure of the State Department to conduct the required biennial performance audits of any county office is considered nonfeasance in office by the State Commission, is cause for the commissioner's removal, and subjects the commissioner to the penalties for nonfeasance.