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• 7 Closure and Post Closure Plans <br />7.1 Notification of Closure <br />Adams County and CDPHE will be notified upon completion of the filling activities and <br />the termination of the operations. A sign will be posted at the gate according to the solid <br />waste regulations 30 days prior to closure. <br />7.2 Closure Elevations <br />The closure elevations are shown on the Site Map in Appendix IV. <br />7.3 Cover Materials <br />A minimum of 18 inches of clean soils and 6 inches of top soil will be placed on top of <br />the fill materials. The cover soils will be capable of sustaining plant growth and conform <br />to the specifications in the revegetation plan in the DRMS mining permit. <br />7.4 Revegetation <br />The fill area will be revegetated with non-irrigated grasses after placing mulch or other <br />media to assist with plant growth. The revegetation will conform to the revegetation plan <br />in the DBMS mining permit. Sustained plant growth should be seen within 2-3 years <br />after revegetation or additional seeding will be done where needed. <br />7.5 Post-closure Activities <br />The post-closure activities include maintenance of the side slopes and top surface of the <br />fill area. Revegetation of the side slopes and top (as appropriate) will be done soon after <br />the site is filled and cover placement is completed. The vegetation will be monitored to <br />see that proper plant growth is occurring and is sustainable within 2-3 years. Areas that <br />do not have sufficient plant growth will have additional revegetation. <br />7.6 Post-closure Time Period <br />The post-closure time period is for five years after the closure certification report is <br />submitted to CDPHE. <br />AFS Frei-Henderson Inert Fill Page 21 of 23 <br />MOLEN 8v ASSOCIATES, LLC