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Page 1 of 1 <br />Hernandez, Daniel <br />From: Berry, David <br />Sent: Monday, February 09, 2009 12:17 PM <br />To: Hernandez, Daniel; Binns, Janet; Kaldenbach, Tom <br />Dan asked that I take a look at the draft "Evaluation of Hydrologic Impacts" and "Evaluation of Subsidence <br />Impacts" document(s) being developed for the pending SL-2 (C-1981-044). <br />In general, I am surprised this is still pending. I thought this action was actually withdrawn years ago due to the <br />fact that dewatering is still occurring, thus the areas being presented for release are not in a state of hydrologic <br />equilibrium. Upon brief review of the imaged documents, I see that the issue was raised in Dan's memo of March <br />1, 2005, but I did not see any reasonable response on the matter. The draft that was given to me last week seems <br />to acknowledge ongoing water management. I may be missing something, but I think we still have a major <br />unresolved issue. <br />Also, the subsidence analysis indicates that there is no surface disturbance above the workings subject to <br />release. I think remember some significant ground mitigation work that took place to repair subsidence features. I <br />cannot remember if we attached a timeframe to the surface repair work, but I am fairly sure that work was done <br />on the surface at multiple locations. <br />This is just a quick policy level review as requested by Dan, so I did not look at the records in detail, but I think we <br />still have some major gaps. <br />DB <br />3/11/2009