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Appendix 4, Table 10. <br /> Poor to Unsuitable Quality Lead Zones in <br /> Overburden and Underburden Core Materi al, <br /> Seneca II Mine, Routt County, <br /> November 1981. <br /> <br />Core Sample Total Lead <br />Hole Interval Thickness Core Concentration <br />No. Material (Feet) (Feet) (%) (ppm) <br />', 2334 0 50.8- 51.2 0.4 0.3 19.2 <br /> 0 170.8-171.3 0.5 0.4 20.4 <br />TOTAL 0.7 <br />2614 0 13.0- 14.7 1.7 1.0 24.5 <br />TOTAL 1.0 <br />• <br /> <br />NOV 2 S 1981 <br />6-159 <br />