During inspection of a 30-year-old atmospheric storage tank containing a flammable liquid, inspectors discover that the bund wall has several cracks and that the impermeable liner has deteriorated in several places. Rainwater is able to drain through the bund wall into the site surface water system. The tank itself has a single bottom outlet with no remotely operated valve. The last bund inspection was recorded as 'satisfactory' eight years previously. What is the primary process safety hazard control failure for bulk storage?
