EDF Health

Presto: Corexit® dispersant ingredients revealed

By / Published: June 8, 2010

Richard Denison, Ph.D., is a Senior Scientist.

With no fanfare whatsoever, a list of the ingredients in the Corexit® dispersants has been posted on EPA’s website.  I can’t say when the list appeared — I was pointed to it by Elana Schor, a reporter with E&E News, who discovered the list a little earlier today, buried well down on the agency’s dispersants page.

The components of COREXIT® 9500 and 9527 are:

CAS Registry Number Chemical Name
57-55-6 1,2-Propanediol
111-76-2 Ethanol, 2-butoxy-
577-11-7 Butanedioic acid, 2-sulfo-, 1,4-bis(2-ethylhexyl) ester, sodium salt (1:1)
1338-43-8 Sorbitan, mono-(9Z)-9-octadecenoate
9005-65-6 Sorbitan, mono-(9Z)-9-octadecenoate, poly(oxy-1,2-ethanediyl) derivs.
9005-70-3 Sorbitan, tri-(9Z)-9-octadecenoate, poly(oxy-1,2-ethanediyl) derivs
29911-28-2 2-Propanol, 1-(2-butoxy-1-methylethoxy)-
64742-47-8 Distillates (petroleum), hydrotreated light

More to come.

Posted in Health policy, Regulation / Tagged , , | Comments are closed

Another BP leak – this time, it’s their 2009 Gulf of Mexico oil spill contingency plan

By / Published: June 6, 2010

Richard Denison, Ph.D., is a Senior Scientist.

Just as BP seems to be making some progress in slowing the leakage of oil from Deepwater Horizon, another leak has appeared.  Karen Dalton Beninato, writing on NewOrleans.com, has obtained, and posted for all to see, a copy of BP’s June 2009 “Gulf of Mexico Regional Oil Spill Response Plan” (caution, it’s a 600-page, 29 MB PDF file!).  [Note added 6/8:  Not sure how long it’s been posted, but the BP Plan is up on the Minerals Management Service website, under “Documents” here (double caution:  this version is a 61 MB PDF!)]

There are some embarrassing parts, with no doubt more waiting to be discovered.  Here’s one example:  The Plan’s “worst-case scenario” for sites more than 10 miles offshore is a total leakage of 177,400 barrels of crude oil (Appendix H).  As reported by the Washington Post this morning, government estimates put the size of this spill at between 23 and 47 million gallons, or between 548,000 and 1.12 million barrels, and counting.

On the issue of dispersants, the Plan is also revealing.  Read More »

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Side-by-sides of TSCA, Senate bill and House discussion draft

By / Published: June 5, 2010

Richard Denison, Ph.D., is a Senior Scientist.

I have updated and made some minor corrections to the summary chart I posted earlier comparing current TSCA to the proposed TSCA reform legislation (Senate bill and House discussion draft) at the 10,000 foot level. It’s displayed below.

In addition, I have prepared a much more detailed side-by-side of the Senate bill and House discussion draft, which I’m posting here as a PDF.

Currently under TSCA Under the Senate and House proposals
DATA:  Few data call-ins are issued, even fewer chemicals are required to be tested and no minimum data set is required even for new chemicals. Up-front data call-ins for all chemicals would be required.  A minimum data set (MDS) on all new and existing chemicals sufficient to determine safety would be required to be developed and made public.
BURDEN OF PROOF:  EPA is required to prove harm before it can regulate a chemical. Industry would bear the legal burden of proving their chemicals are safe.
SAFETY ASSESSMENT:  No mandate exists to assess the safety of existing chemicals.  New chemicals undergo a severely time-limited and highly data-constrained review. All chemicals, new and existing, would be subject to safety determinations (in the case of certain new chemicals, at some point after entry into commerce).
SCOPE OF ASSESSMENT:  Where the rare chemical assessment is undertaken, there is no requirement to assess exposure to all sources of exposure to a chemical, or to assess risk to vulnerable populations. The safety standard would require the assessment of a chemical to account for aggregate and cumulative exposures to all uses and sources, and to ensure protection of vulnerable populations that may be especially susceptible to chemical effects (e.g., children, the developing fetus) or subject to disproportionately high exposure (e.g., low-income communities living near contaminated site or chemical production facilities).  “Hot spots” would be specifically identified and addressed.
REGULATORY ACTION:  Even chemicals of highest concern, such as asbestos, have not been able to be regulated under TSCA’s “unreasonable risk” cost-benefit standard.  Instead, assessments often drag on indefinitely without conclusion or decision. Chemicals would be assessed against a health-based standard, and deadlines for decisions would be specified.  Chemicals of highest concern would be subject to expedited safety determinations and/or actions to reduce use or exposure to them.
INFORMATION ACCESS:  Companies are free to claim, often without providing any justification, most information they submit to EPA to be confidential business information (CBI), denying access to the public and even to state and local government.  EPA is not required to review such claims, and the claims never expire. All CBI claims would have to be justified up front.  EPA would be required to review them, and only approved claims would stand.  Approved claims would expire after a period of time.  Other levels of government would have access to CBI.
RULEMAKING REQUIREMENTS: To require testing or take other actions, EPA must promulgate regulations that take many years and resources to develop. In addition to the MDS requirement, EPA would have authority to issue an order rather than a regulation to require reporting of existing data or additional testing.
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A thing of beauty: EPA restores a good chunk of the public’s right to know under TSCA

By / Published: May 28, 2010

Richard Denison, Ph.D., is a Senior Scientist.

One rarely gets to use the words “elegant” and “Federal Register notice” in the same sentence.  But that’s the best way to describe the notice EPA published yesterday.  The notice states EPA will now review all confidentiality claims for chemical identity in health and safety studies, and announces to companies making such claims that they should expect soon thereafter to get a letter from EPA denying the claim.

In a concise and clearly reasoned notice, EPA sweeps away decades of poor policy and practice at the agency that was at odds with the clear intent of Congress under the Toxic Substances Control Act (TSCA).
Read More »

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Oil spill dispersants: What part of “contingency plan” did we not understand?

By / Published: May 24, 2010

Richard Denison, Ph.D., is a Senior Scientist.

Now more than a month into the mammoth, out-of-control, no-end-in-sight oil spill at Deepwater Horizon, the unanswered questions, data gaps and withheld information surrounding BP’s use of dispersants are flowing in seemingly as fast as the oil is leaking.

With each passing day, it seems we know less and less about the composition and safety of these dispersants, other available dispersants, and even whether the use of dispersants– especially on this unprecedented scale – is to be advised at all.

It begs the question:  Isn’t having ready answers to such questions the reason why the federal government was required to develop a contingency plan in the first place?  Read More »

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Just what the doctor ordered: EPA tells BP to use less toxic oil dispersants in the Gulf

By / Published: May 20, 2010

Richard Denison, Ph.D., is a Senior Scientist.

This just out:  The Washington Post is reporting that EPA has given BP 24 hours to identify and locate a supply of a less toxic dispersant to be applied to the Gulf oil spill, and to begin using it within an additional 72 hours.

As noted in my last post, EPA has identified numerous alternative dispersants that are both less toxic and more effective than those on which BP has been relying to date — more than 600,000 gallons of which have already been released into Gulf waters.  The Post also notes that some forms of the initial dispersants, sold by Nalco under the trade name Corexit®, were banned by the British government more than a decade ago.

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