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DynMcDermott Petroleum Operations and DOE

Year Submitted: 2010

Process: Petroleum Storage

Industry: Petroleum Storage/Distribution

Wastes Reduced: VOC emissions

Location: Winnie & Freeport TX

No. of employees: 500

Contact: Terry Baxter

Phone: 504-734-4193


DynMcDermott Petroleum Operations Company implemented a voluntary pollution prevention project in 2007 that uses existing floating roof tanks to reduce VOC emissions from cavern workover operations at the U.S. Department of Energy, Strategic Petroleum Reserve (SPR) sites in Texas. Prior to 2007, SPR workovers used temporary portable frac tanks to depressurize the crude oil storage caverns when maintenance was required. Workovers must be performed at ambient pressure to minimize crude oil loss if a spill occurs. Crude oil from the pressurized cavern was sent by centrifugal pump to a fixed roof frac tank, vented to the atmosphere for depressurization and then transferred by triplex pump to another receiving cavern. VOC emissions were substantial when frac tanks were used.

P2 Application:

Existing floating roof tanks were already being used at the two SPR sites for crude oil storage. Cavern crude oil from workover operations was redirected using existing pumps and manifold piping to these tanks to avoid the use of frac tanks. Cavern workover emissions were greatly reduced due to the mixing of the hot cavern crude oil with the cooler, lower vapor pressure crude oil stored in the crude oil storage tanks and through the use of the floating roof as a better pollution control device than the fixed roof frac tanks. Since implementation, SPR workover emissions have been reduced by 99% in 2009 and a total of 112 tons of VOC emissions have been prevented over three years.

  • Total Cost Savings: $20,000.00
  • Comments: The SPR is a charter member of the TCEQs Clean Texas, Cleaner World program. The SPR made a 3-year commitment to reduce workover emissions by 15%. As a result of this project being a Clean Texas commitment, it supports a direct savings of $20,000 per year in reduced fugitive emission monitoring at the two SPR sites granted by TCEQ contingent on the SPR maintaining membership in this program.

Details of Reductions

  • 37.0 - ton of   VOC emissions

Additional Information :

This project implemented a voluntary process change that went above and beyond legal requirements. Cavern workover operations are maintenance activities and the frac tanks were temporary mobile air sources that were exempt from permitting.

Source: TCEQ

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