Exxon Corp. disclosed it has spent more than $600 million on the Alaskan oil spill and acknowledged it would never be able to fully clean up the state's oily beaches. Exxon USA President William Stevens, testifying to a Senate Commerce Committee hearing on the March spill, clashed repeatedly with Alaska conservation commissioner Dennis Kelso. Kelso said the company should stay in Alaska beyond Sept. 15, the date the company plans to shut down operations. Stevens said "all significantly impacted shoreline will have been treated" by mid-September. Stevens and Kelso disagreed on how much shoreline had been "treated" but agreed that the treatment fell short of fully cleaning up the beaches.
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