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Thread: US bans offshore drilling as Deepwater Horizon slick hits land

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by megaprogman View Post
    I see a distinct lack of rainbows in those streams.
    There's actually a good reason for that.

    Notice the shadow of the ships. Those shadows generally point in the direction of the aircraft taking the photo. This means the sun is generally forward of the photographer.

    You can only see a rainbow when the sun is at your back.

    I'm certain that if this photo were taken from the other side of the rig there would be a rainbow....which is probably something the photographer new and wanted to avoid for the sake of taking a clear picture of the site.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Random funny:


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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Gulf oil spill: Tar balls found in Florida Keys not from Deepwater Horizon slick, Coast Guard says
    May 19, 2010 | 9:24 am



    The Coast Guard announced Wednesday morning that the blobs of tar that washed up in the Florida Keys earlier this week are not related to the Gulf of Mexico oil spill.

    The Coast Guard analyzed the tar balls as evidence mounted that at least some oil from the spill soon would arrive in South Florida.

    The analysis determined conclusively that the tar balls collected from the Keys beaches do not match the type of oil from the gulf spill, the agency announced in a news release. The source of the pollution is unknown.
    Calm the **** down, people.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by Jerry View Post
    Calm the **** down, people.
    LOL, and if you've ever been to the beaches from San Diego to Los Angeles, little tar balls wash up on shore all the time. It's a natural occurrence!

    The ocean floor seeps oil all the time. Much of it is devoured by microrganisms, but some of it isn't.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by Erod View Post
    LOL, and if you've ever been to the beaches from San Diego to Los Angeles, little tar balls wash up on shore all the time. It's a natural occurrence!

    The ocean floor seeps oil all the time. Much of it is devoured by microrganisms, but some of it isn't.
    Yeah, the worst is over.....this little bit of seepage from the pipe is nothing. Lets start drilling again.
    "This Administration will constantly strive to promote an ownership society in America. We want more people owning their own home. It is in our national interest that more people own their own home. After all, if you own your own home, you have a vital stake in the future of our country."" GWB

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by USA-1 View Post
    Yeah, the worst is over.....this little bit of seepage from the pipe is nothing. Lets start drilling again.
    Should've never stopped.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by Jerry View Post
    Should've never stopped.
    Yeah, I know.
    Who needs Florida, anyway.
    Last edited by USA_1; 05-19-10 at 05:45 PM.
    "This Administration will constantly strive to promote an ownership society in America. We want more people owning their own home. It is in our national interest that more people own their own home. After all, if you own your own home, you have a vital stake in the future of our country."" GWB

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by Jerry View Post
    drz-400, thank you for your links and thoughtful posts. I may have been wrong about the weight of the crude from the Valdez. I'm not yet sure I was wrong, but you gave a good argument and I'm reconsidering the point as I argued it. If I'm wrong then I accept my error.
    ...
    If I understand the information you presented correctly, the attribute of crude which most dictates how volatile a spill is to the environment gallon for gallon, and assuming everything else is equal, is the surfer content.
    I think the sulfur content would definetly have a lot to do with the toxicity of the oil, but I am sure other things can contribute to. I am no expert though, but this spill is better in that regard. It is also slightly "lighter" than the exxon spill, and the fact that the exxon spill was in alaska I am sure made the oil slightly thicker than in the gulf simply due to temperature. So some of the oil may evaporate quicker. I wouldn't say its a huge difference though.

    I also looked up some data from the EPA:
    Group 2 -specific gravity less than 0.85;
    Group 3 -specific gravity equal to or greater than 0.85 and less than 0.95;
    So if you actually crunch the numbers, at 60 degrees F you have a specific gravity of .866 for the exxon spill and .845 for the best case bp spill. So with temperature you could safely assume the exxon spill was a group 3 oil, while the best case for this spill is a borderline group 2 / 3.

    So here's something on the trade offs between a type 2 and 3 spill, keeping in mind this spill will most likely be in between the two.

    Type 2—Light Oils (Diesel, No. 2 Fuel Oil, Light Crudes)
    • Moderately volatile; will leave residue (up to one-third of spill amount)
    after a few days.
    • Moderate concentrations of toxic (soluble) compounds, especially
    distilled products.
    • Will "oil" intertidal resources with long-term contamination potential.
    2-7
    • Has potential for subtidal impacts (dissolution, mixing, sorption onto
    suspended sediments).
    • No dispersion necessary.
    • Cleanup can be very effective.

    Type 3—Medium Oils (Most Crude Oils)
    • About one-third will evaporate within 24 hours.
    • Maximum water-soluble fraction 10-100 ppm.
    • Oil contamination of intertidal areas can be severe and long-term.
    • Oil impacts to waterfowl and fur-bearing mammals can be severe.
    • Chemical dispersion is an option within 1-2 days.
    • Cleanup most effective if conducted quickly.
    http://response.restoration.noaa.gov...8_Chapter2.pdf

    So what I can gather, without cleanup this spill may not be as long lasting and cleanup could potentially be easier. The lighter stuff will be more soluble, so it will have the potential to be more toxic. But since this is a sweeter crude, it may be less toxic to begin with.

    One thing that does bother me from what I read:

    Formation of emulsions affects the behavior of an oil spill in many ways. First,weathering rates are much slower. The oil is more viscous and sticky. The volume of “oil” is increased by a factor of 2-3, because the emulsion is up to 70 percent water. Most recovery equipment works very poorly on mousse.
    The fact that this spill should be slightly more soluble should make emulsion less of a problem. However, since it is borderline (and that it is spilling/blowing out of a pipe) it may emulsify instabily, causing a creaming effect with the lighter substances on top and heavier on the bottom. Reports from the news show there has been a mousse made by the oil so this tells me that this may be happening (I think you already said this). This would definetly make it harder to clean up the more lasting heavy stuff because the ligher stuff would be in the way on top.
    Last edited by drz-400; 05-19-10 at 05:52 PM.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by USA-1 View Post
    Yeah, I know.
    Who needs Florida, anyway.
    How about we need Florida and we need oil. I'm sure a compromise can be found.

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    Re: US bans offshore drilling as Deepwater Horizon slick hits land

    Quote Originally Posted by drz-400 View Post
    How about we need Florida and we need oil. I'm sure a compromise can be found.
    Probably should have done something 30 years ago.
    "This Administration will constantly strive to promote an ownership society in America. We want more people owning their own home. It is in our national interest that more people own their own home. After all, if you own your own home, you have a vital stake in the future of our country."" GWB

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