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by track -hoe or dozer blade, to provide additional erosion protection and sites for <br />seedling establishment on steep slopes. <br />The proposed operation is in compliance with the requirements of this section. <br />V. Sealing of Drilled Holes and Underground Openings <br />All exploration, drill or boreholes, wells, or other underground openings except those <br />used solely for surface blasting will be plugged or sealed to prevent acid or toxic drainage <br />form entering the groundwater, minimize disturbance to the prevailing hydrologic <br />balance, and ensure safety. Details of the sealing plan are located in Tab 18, Volume 12 <br />of the permit application package. No variance from regulatory requirements regarding <br />sealing has been requested or proposed for approval, and no such specific findings apply. <br />The Division requires that each hole, well or underground opening be capped, sealed, <br />backfilled or otherwise properly managed (4.07.3). <br />VI. Use of Explosives <br />Explosives were used to fragment overburden and exposed coal at the Seneca II -W Mine. <br />Seneca Coal Company typically used ammonium nitrate and fuel oil (ANFO) for this <br />purpose, primed with cast primers and detonated with detonating cord. A certified <br />blaster was to be in charge of all blasting operations to ensure compliance with State and <br />Federal laws. Additional information regarding blasting operations is located in Volume <br />11, Tab 14 of the permit application package. <br />SCC submitted a revision to the permit application to establish maximum allowable <br />ground vibrations from blasting, as a result of damage to private property, including oil <br />tanks and an oil well. SCC was to maintain peak particle velocities at the oil well site of <br />five inches per second (ips) or less, and utilized a seismic monitor at the well site to <br />verify maximum peak particle velocities. SCC also increased the bore hole column stem <br />in areas where mud seams were encountered in the upper strata. These plans were <br />implemented within 1,000 feet of the Meridian Oil Well. <br />VII. Backfilling and Grading <br />The application states that the mining plan for the Seneca II -W Mine was developed in <br />conjunction with the Seneca II Mining Plan. The pit progression design was based on <br />standard mining practices, tried and proven at the analogous Seneca 1I Mine. The <br />backfilling and grading plan is found within Volume 13, Tab 20. The reclamation <br />schedule, including a request for a variance from the contemporaneous reclamation <br />requirements of Rule 4.14 is contained within Volume 12, Tab 19. <br />The applicant completed projections of overburden bulking, in order to project <br />post- mining topography within the mined area. The projections included within the <br />Seneca II -W Findings Document 44 C -1982 -057 <br />Permit Revision No. 6 January 6, 2012 <br />