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After operations of the loadout facility haw bean re++.;..~tsd and reclamation activities haw <br />• been initiated, the ahallox monitoring wells xill be abandoned folloxinq consultation with C@G <br />using aooeptable prooedurea. Well abandonment prooadures will include: 1) cutting the casing off <br />one foot belox the ground surfaw; 2) filling the wall bore from the bottom to 20 feat below <br />gzvund surfaw with high solids bentonita grout or Dement using a trami.e lima to ensure that the <br />bore water is displawd; 3) grouting the top 20 feet of the well bore with o®ent; and 4) <br />acuifying and seeding the grwmd surfaw in the immediate vicinity of the well. <br />Surfaw Water Protection <br />Txo sedimentation ponds (Ponds 1 and 2, see Exhibit 13-1, Tab 13, Hydrologic Ionitoring Program) <br />are currently in operative at the HGT Iaadwt facility. The ponds will be used during the <br />proposed operations for controlling surfaw water runoff from disturbed areas. Both ponds are <br />designed to prevent additional suspended 9ai: meat t0 9tr6amfloM Ollt9lde the peroit area, t0 <br />^~'^;`^; xe ero81on1, 8nd t0 maintain sufflClent detention time t0 ellaul9 that all applicable <br />effluent sr'^a-++'+~ Mill ba met. <br />The impact o£ discharges from the two panda on rewivinq atrseme (Dry Creek, Yampa River) was <br />• found to be insignificant (sea Tab 15, PHC). LdPDE3 monitoring at the tw pond outfalls (001 and <br />002) ainw 1986 has resulted in Dim axwedanos of NPDES permit affluent Limitations (pH value of <br />9.3 from Outfall 002A an April 11, 1997). Based on past monitoring, it ie anticipated that no <br />treatment o£ pond effluent Mill be newseary during the life o£ the facility. <br />Plana for handlinxl and redistributing topsoil during reclamntian of the loadout facility era <br />discussed in Tab 19 (Soil Raconatructiw) . The plena haw been developed to ensure that 1) <br />surfaw runoff from the nacre+^~ facility landscape will not soma in contact with acid or toxic <br />materials; 2) the landscape is stabilized; 3) erosion pxevantad; and d) additional contributions <br />of suspended sediment to reaeivinq atrasms is m+^+~^+zed. <br />Tab 12 (Facilities) discusses pertinent aspects of the surfaw water control plan (Exhibit 12-2) <br />developed for the loadout facility. All facilities associated with the plan rill be operated and <br />maintained during the life of tlm HGT loedwt facility to m+^;m+za erosion, control rvnofP from <br />the facility, and prevent the contribution of additional sediment to runoff. <br /> <br />,2N - o/ <br />2 Revised 2/98 <br />