Will Capitol Hill opponents of EPA cement standards stand down?

Now that EPA has rejected industry calls to block the rules, but will consider

potential minor changes that would further clarify and simplify the rules. As EPA considers these minor changes, EPA will seek opportunities for further clarification, simplification, or flexibility without sacrificing important health protection from emissions of mercury, soot and other harmful air pollutants.

The cement lobby has gotten supporters in Congress to try blocking these important health standards. Don't bet the farm that they'll give up.

More information on the August 2010 cement standards:
http://yosemite.epa.gov/opa/admpress.nsf/e77fdd4f5afd88a3852576b3005a604f/ef62ba1cb3c8079b8525777a005af9a5!OpenDocument

More information on the Reconsideration:
http://www.epa.gov/ttn/oarpg/t3/fact_sheets/cementreconsideration2011fs.pdf