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Underground Injection <br /> Page 2 <br /> The same beneficial effect that this adjustment in injection <br /> methodology is expected to achieve cannot be achieved at the Terry <br /> Tunnel due to the large horizontal distances involved between the <br /> bulkhead injection pipe and the ore pass. Excess lime would be <br /> expected to settle out before reaching the physical mixing zone. <br /> This alternate point of alkalinity injection was anticipated in the <br /> approved work plan and UIC Rule Authorization and SGC cannot <br /> envision any circumstance where harm could occur because of this <br /> program adjustment other than the financial cost to SGC. Because <br /> of the shortness of the remaining work season at high altitude, SGC <br /> intends to proceed unless notified that this technique is not <br /> viewed by the EPA as appropriate. <br /> Sincerely, <br /> Larry Perino <br /> Reclamation Manager <br /> cc: Sarah Johnson, CDPHE <br /> Wally Erickson, DMG <br /> Send by telecopy with confirmation original <br />