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jumps from the 5 percent range to a value of around 15 percent, there is a <br />potential for there to be a problem with cavern growth or stability. This <br />instability may lead to a failure that <br />affects overlying aquifers. At a minimum, there should be an <br />investigation of the potential causes of the change in balance and a summary <br />of the investigation in the quarterly report. This summary should also <br />provide a plan for addressing any problems identified by the investigation. <br />I would appreciate some feedback on the status of the cavities and on my <br />proposal to modify the Permit. <br />Paul Stephen Osborne <br />National Ground-Water Expert <br />Region VIII UIC Program <br />###################################################################### <br />Attention: <br />This e-mail message is privileged and confidential. If you are not the <br />intended recipient please delete the message and notify the sender. <br />Any views or opinions presented are solely those of the author. <br />###################################################################### <br />##################################################################################### <br />Thi s~e-mail message has been scanned for Viruses and Content. <br />##################################################################################### <br />