Feeds:
Posts
Comments

Posts Tagged ‘dispersants’

Ed Tennyson

Edward J. Tennyson passed away last Friday at his Smith Mountain Lake, Virginia home. Ed worked in the Department of the Interior’s offshore program for more than 20 years, and arguably has done more than any single individual to advance oil spill response capabilities. A few of Ed’s many achievements:

  • Ohmsett: EPA operated the Ohmsett spill response test tank in Leonardo, New Jersey, beginning in the early 1970s, but the facility fell into disrepair in the 1980s. Thanks to Ed’s vision and persistence, and the enactment of the Oil Pollution Act of 1990, the Minerals Management Service (MMS) began restoring the facility. Ed led the effort and did everything from operating forklifts to designing upgrades. Senator Frank Lautenberg (NJ) and a host of dignitaries participated in the grand reopening event in 1992. It was an amazing day, and Ohmsett, MMS’s only industrial facility, has exceeded even Ed’s lofty expectations. 
  • Burning oil slicks: Ed and a few of his US and international partners were the first to consider in situ burning as an oil spill response method. After some lab work, Ed proposed larger scale testing at Ohmsett in the presence of ice. The testing was amazingly successful, removing almost all of the oil. When Ed told a leading skeptic about the impressive results, his response was “you didn’t do it right.” 😀 
  • Newfoundland burn: Because research spills were prohibited in US waters, Ed worked with his Canadian partners to conduct an in situ burning test offshore Newfoundland in 1993. Ed was an amazing leader during any kind of field trials, and was always the first person on the dock directing team members to their stations!
  • Remote sensing: Ed’s research led to a patent on the use of shipborne radar for locating oil slicks. Ed greatly advanced this capability by developing tools for airborne mapping and thickness determinations. As Ed frequently said, “90% of the oil is in 10% of the area.” By identifying where the oil was thickest, you could optimize spill response. (Ed was also an expert at identifying slicks with what he called his mach 20 eyeball ðŸ˜€).
  • Chemical treatment: Ed was a leader in researching dispersants, herding agents, and other chemical methods for preventing spills from impacting shorelines or other sensitive areas.

Ed was an entertaining and informative speaker and was often called upon to brief congressional panels, and discuss his research at public meetings and professional conferences. He was rightfully a media darling and was often contacted for comments on oil spill response matters. Perhaps his most famous quote was in the Wall Street Journal during the Valdez spill in Prince William Sound. Ed described the spill response as follows: “Like mowing a 40 acre field with a 1/4 inch lawn mower.” ðŸ˜‰

RIP Ed, you made a difference!

Newfoundland Offshore Burn Experiment, 1993

Read Full Post »

Good news first:

Scientists at the Woods Hole Oceanographic Institution in Massachusetts found circumstantial evidence that the chemicals guided some oil into underwater currents, stopping it from bubbling up to the surface, where it would do more damage, said marine chemist Elizabeth Kujawinski.

Now the bad:

But she added, “the dispersant is sticking around,” which is worrisome. The chemicals didn’t seem to biodegrade the oil and gas as fast as basic chemistry would predict.

See the AP article recommended by BOE oil spill guru Cheryl Anderson.

Read Full Post »

Link to EPA Release. The results are not surprising.

These results confirm that the dispersant used in response to the oil spill in the Gulf, Corexit 9500A, is generally no more or less toxic than the other available alternatives.

Good, timely work by EPA.  Also:

EPA believes dispersants should only be used sparingly and when absolutely necessary. Since the well was capped, only 200 gallons of dispersant have been applied to the Gulf, but constant monitoring continues.

Read Full Post »

End game mysteries?:  As BP prepares for the static kill operation, the well’s flow path is still not clear.   While the consensus seems to be that the flow originates in the annulus outside the production casing, irregularities during the cementing and testing of that casing suggest the possibility of flow inside the casing.  The condition of the well bore and casing strings is also uncertain. Perhaps of greatest importance will be the inspection of the BOPE after the well is plugged and the stack is pulled.  This inspection process should be closely supervised by the regulators.

Press conference etiquette?: After admitting that they joined yesterday’s Unified Command press briefing late, two reporters asked questions that had been answered earlier.  Perhaps they think their time is more important than Admiral Allen’s, or that of the other attendees, viewers, and listeners.  One of these questioners asked when the static kill operation would begin.  Admiral Allen, who answered the question politely and patiently, should have asked when it would be most convenient for the reporter. Surely, the Unified Command would want to accommodate the reporter’s busy schedule. 😉

Dispersants: As has been demonstrated at oil spill workshops and conferences for the past 30 years, you can always stir up passions by questioning the use of dispersants.  Dispersants, unlike burning and skimmers, don’t remove oil from the water (at least not directly).  The On-Scene Commander (OSC) must consider the tradeoffs and make the decisions that he or she thinks will minimize the net impact of the spill.  Given the magnitude of location of the Macondo spill, I think the OSCs made the correct calls.  Dispersants were also used (not without controversy of course) in responding to last year’s Montara blowout in the Timor Sea.

Read Full Post »