Tank has to be drained and cleaned. Waste has to be collected, treated and disposed. Heavy equipment, such as hydroblasters, vacuum trucks, degassing systems, and waste treatment, is required. . . Tank can remain operational and full of product. Significant turnaround and tank outage planning required.
Scheduling is on as-needed basis.
Project management is limited to contractor s daily work permits. . . . Confined air space entry is between 600 and 10,000 manhours. Continuous oxygen, LEL, toxicity monitoring and holewatch is required. . . Confined air space entry is 0 hours for fixed roofs and 4-8 manhours for floating and internal floating roofs. . . . Alternate storage is a factor. . . .