Seattle, Washington, Butane Tank Degassing Challenge A terminal located on the Northwest had to meet their deadline inspection on a large, 350,000 BBL Butane storage tank. In addition to taking the tank out of service they had a narrow window to complete the degas, turnaround work and return the tank back to service. Regulatory permit support was also needed to obtain the mandatory permit. Solution Due to the size of the tank and location within the site, careful planning and HAZOP considerations were discussed among our project engineers, the site representatives and other contractors. The tank was safely degassed under an inert atmosphere with nitrogen up to 4000 CFM. Two EMECS 42 MMBTU/hr thermal oxidizers were utilized to meet the customer schedule which could have taken 100 times long

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