[MEG Note: There is some speculation that UP is not reporting trains spotted coming over the Carquinez trestle and through downtown Martinez only because they are hauling TAR SANDS oils which are not reportable under the DOT May 7 Order. This may be why it has been so hard to identify the unit trains in downtown Martinez.]

By Molly Samuel   KQED Science   June 25, 2014

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http://blogs.kqed.org/science/2014/06/25/revealed-volatile-oil-train-routes-in-california/