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4. OVERBURDEN SAMPLING -REGRADED AREAS <br />• Requirement <br />As outlined in Permit Exhibit 6. Geological Information, Item #4, Overburden Sample Program of the <br />Colowyo Permit, a regraded overburden sampling program is required at a density of one sample per <br />five acres of regraded area. <br />Response <br />Colowyo continues to utilize the "State Plane Coordinate System" as the grid system far sampling <br />regraded overburden areas. Refer to Exhibit 10. 1997 Annual Re~rt Mao, for the location of the <br />sampled areas. Use of the intersecting lines provide a uniform square grid system of approximately <br />five acres per square. During 1997 a total of 20 regraded area samples were obtained representing <br />approximately 100 acres of additional regraded overburden area. The analyses are provided in <br />Exhibit9 - Regraded Overburden Sampling. <br />No suspect materials were encountered during the sampling program. <br />u <br />• 11 <br />