14.4. Operation specification<br>14.4.1. Internal audit frequency: before the external audit of the year, the audit frequency shall be conducted at least once a year.<br>14.4.2 Auditor: the person who has received the training related to the audit of environmental safety management system, and the training records shall be kept in ESH.<br>14.4.3 internal audit schedule / plan: one week before the implementation of internal audit, ESH shall prepare the internal audit schedule / plan and inform the auditor and the audited unit.<br>14.4.4 internal audit report: the auditor shall write the report of the audited unit, and issue the nonconformity, suggestion or observation items in accordance with the management procedure for nonconformity and corrective measures if any nonconformity is found during the audit. The ESH shall be collected and transmitted to the audited unit before the EHS audit meeting.<br>14.4.5 record keeping: the records of internal audit shall be kept by ESH for another year.<br>
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