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APPENDIX 6-S (Cont.) <br />Table 6-5-2 (Cont.) <br />Marginally Suitable to Unsuitable Oual ity Zones <br />in Overburden, Interburden, and Underburden Material, <br />Nucla East Study Area, Montrose County, Colorado <br />Footnotes <br />1The following abbreviations apply to sample type: SH - shale, SS - sandstone, SNDY - <br />sandy, SLTY - silty, SHLY - sh aley, CL - clay, CARH - carbonaceous, and LO - coal. <br />ZCeologic strata includes: OBV - overburden (material above upper Dakota coal seam), INB <br />- inte rbu rden (material between upper Dakota and lower Dakota coal seams), UNB - <br />underburden (material below lower Dakota coal seam), and C - coal. Li thol ogic Units 1 <br />through 6 are described in Attachment 6-1, Overburden-I me rburden-Underburden <br />Characteristics section. <br />3The percentage of marginally suitable to unsuitable strata is combined for the overburden <br />and interburden sections. No percentage figures are included for the underburden since <br />an incomplete section was sampled. <br />4Mitigati ve measures include: AV - avoidance, M - mixing, and SH - selective handling. <br />SThe following abbreviations apply to texture: 5 - sand, and C - clay. <br /> <br />6-5-6 Revised 04/11/88 <br />