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Homestake Mining Company <br /> June 1 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> Project Name: Pitch Mine Reclamation Project-Reclamation Plan <br /> Date of Submittal: March 1,2019 <br /> File Name: SRCE_Version_1_4_i_016c 2019-06-06_amh_User 3 Updates.xlsm <br /> Model Version:Version 1.4.1 <br /> Cost Data:User Data <br /> Cost Data File:SRCE_Cost_data-USR_1_12 2019-05-14.xlsm <br /> Cost Estimate Type:Surety Cost Basis:Northern Nevada <br /> Well Abandonment <br /> Labor I Equipment Materials I Totals <br /> Production Dewaten,g Infiltration Wells 50 $0 50 s0 <br /> Monitoring Wells $13.267 $36,262 $508 $50.037 <br /> TOTALSI $13,267136,262 508 50,037 <br /> Production,Dewatering and Infiltration Well Closure <br /> Original Top casing <br /> Number Static of Below TOP Type of Hole <br /> Description of Average Depth to First Water sbtteA of Pump Deplh to Plug <br /> freq.hed) ID Code Holes Casing Dum Depth' Water L.M Cashtg''' screen'2, (a aryl Pump Method <br /> fl Cgs fl bgs ft Cgs n bgs fl (select) fl bgs (select) <br /> (1)For prevmusly abandoned holes enter"0"for depth <br /> (2)Wells abandoned per Nevada Administrative Code(NAC 534.420),Hole grouted and perforated from bottom to 50 feet(15.24m)above the top of the screen or first water encountered or original static <br /> (3)Perforation length=amount of blank casing below first water(for confined aquifers)or predicted recovered water table(unconfined aquifers).50 feet(15 24m)of blank casing above water table <br /> (4)Assumes 50'(15.24m)sanitary seal at top of hole.Therefore,perforation and grouting only required to bottom o1 sanitary seal. <br /> (5)Assumes 100%loss to formation for grout(abandonee)for screened and perforated sections. <br /> (6 Assumes 10'(3m)top seal of cement in casing only.See note 4. <br /> (7)Inert meter"'is cuttings or alluvium sourced locally, <br /> (8)Includes perforation tool wear costM of perforation(see Produdwy Sheet). <br /> (9)See Productivity Sheet for hourly production.Minimum 1 fir per hole-fond hours per hole for move and setup.a no perforation required,use standard dnll rig. <br /> (10)See ProtluctWdy Sheet for hourly production.Minimum 1 hr per hole. <br /> Notes <br /> Page 1 of 5 HOMESTAKE MINING COMPANY <br /> 87 of 164 <br />