While surface preparation inspection of an offshore structure you have been noticed that blasting standard doesnt not meet the minimum requirement of Sa 2.5 (as per ISO 18501-1). The QC inspector for the contractor/applicator reports that, based on his visual assessment, the blasting standard meets the requirements of Sa 2.5 as per ISO 8501-1. How you are going to explain about the standard and minimum surface preparation requirement? What type of tools need to be used to check the standard? How you will explain about the importance of surface preparation?