The Mines and Geosciences Bureau, Regional Office No. XI maintains its existing Certification for ISO 9001:2015 during the TÜV Rheinland Philippines, Inc. surveillance audit on August 31, 2021 with five (5) positive findings, eight (8) opportunities for improvement and zero (0) non-conformity. The schedule for the second surveillance audit will be on September 29, 2022.  The Certificate for ISO 9001:2015 was issued on February 4, 2021 and valid until October 19, 2023 and MGB XI has maintained the ISO 9001:2015 for four years since its first certification on 2017.