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acid-producing potential should be evaluated. <br /> Aggregate excavation and transmittal to the Terry + <br /> Tunnel was occurring. County road widening and <br /> improvement was also occurring. <br /> Response: <br /> None required. <br /> Question: <br /> 3. Terry Tunnel area was graded, trash buried, and area <br /> gravelled. The new pond discharge culvert and energy <br /> dissipator was installed. Gravel stockpiled on site <br /> for use in mine. Pond sediments were placed in an <br /> excavated trench rather than disposed of atop TP #3 , as <br /> required by the permit. Sample results of this <br /> material should be sent to MLRD ' s offices to determine <br /> the quality and fate of this material . <br /> Response: <br /> Interpretation of lab results of analyses conducted on <br /> three randomly selected Terry Tunnel settling pond <br /> sediment samples shows that the potential exists to <br /> revegetate these materials , and that the materials <br /> could not have been derived from chemical precipitation <br /> of mine drainage waters (analyses enclosed) . Sample <br /> analyses were conducted using the AB-DTPA extract , as <br /> was done for previous soil analyses conducted for the <br /> Consolidated 112 Application for the Sunnyside Mine and <br /> Mill . <br /> All three samples are classified as a silt loam with <br /> 16 . 5 to 28 . 4 percent sand. By comparison to data in <br /> table D-4 on page D:5 of the 112 Application for the <br /> Sunnyside Mine and Mill , Terry Tunnel pond muds show an <br /> increase in the silt/sand ratio over native Lake Emma <br /> sediments. Selective transport through the mine has <br /> resulted in a reduction in the sand content and <br /> increase in the silt content, otherwise the materials <br /> are similar texturally. If these materials had been <br /> derived by precipitation from mine drainage water, the <br /> texture would have been clay with no silt or sand sized <br /> material present. The textural analysis alone confirms <br /> that these materials are lake sediments washed through <br /> the mine from Lake Emma, and that they are not sludges <br /> derived from the chemical treatment of mine drainage <br /> waters. <br /> Extract results show that copper, lead, manganese, and <br />