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location and sample interval in Appendix 6-5. Effective mitigative <br />measures will include avoidance; ameliorating reclamation techniques; <br />blending, dilution, and/or burial by normal overburden/interburden <br />handling and where necessary, selective handling. These mitigative <br />measures, listed in Appendix 6-5, are discussed in more detail in Tab <br />21, Minesoil Reconstruction. <br />Conclusions. The following conclusions are evident from the overburden <br />assessment at Nucla Mine: <br />1. Overburden and interburden information from the Phase I Nucla Mine <br />OIU sampling area was evaluated and statistically summarized to <br />define site specific conditions and to select and justify a <br />chemical and physical parameter list for Mine Areas 2 and 3. <br />2. There is little lateral variability in the local depositional <br />environment at Nucla Mine based upon lithologic descriptions, <br />textural analyses and standard deviation values within the <br />individual Phase I and Phase II sampling areas. <br />3. Based upon local variability and relevant research, four sample <br />holes (one core and three chip sample holes) in Mine Areas 2 and 3 <br />873E, 874E, 875E and 876E were drilled and sampled to accurately <br />predict overburden and interburden characteristics. <br />4. A noncontaminating lithium based drill stem joint lubricant was <br />used at all 1986 sample sites. Air was the only drilling medium <br />utilized. <br />5. Based upon site •specific conditions and CMLRD stipulations, the <br />overburden and interburden parameter list for Mine Areas 2 and 3 <br />included pH, electrical conductivity, acid base potential <br />(including associated analyses), saturation percentage, iron and <br />manganese for all samples. Nickel, molybdenum and zinc analyses <br />were also included for samples collected from site 873E. <br /> <br />6-53 Revised 04/11/88 <br />