Laserfiche WebLink
REVIEW AND LIABILITY <br />A. THE BEHAVIOR OF THE SYSTEM WILL BE MONITORED AND MAINTAINED <br />BY THE PERMITTEE FOR AT LEAST FIVE YEARS FOLLOWING DECOMMISSIONING. <br />B. IF ANY COMPONENT FAILS DURING THE OBSERVATION PERIOD TO <br />FUNCTION TO ITS DESIGN STANDARDS AS APPROVED IN THE PERMIT AND SUCH <br />FAILURE IS DUE SOLELY TO APPROVED DESIGN FACTORS, THE OBSERVATION <br />PERIOD MAY BE EXTENDED AN ADDITIONAL ONE YEAR FROM THE DATE OF SUCH <br />FAILURE OR ANY ALTERATIONS OR MITIGATION RESULTING FROM SUCH <br />FAILURE, WHICHEVER IS LATER. <br />C. THIS STIPULATION DOES NOT ESTABLISH MAXIMUM LIMITATIONS OF <br />LIABILITY FOR THE PERMITTEE, BUT ESTABLISHES MINIMUM REQUIREMENTS <br />FOR THE PERIOD OF OBSERVATION. AT NO TIME WILL RELEASE FROM <br />LIABILITY BE CONSIDERED AUTOMATIC BUT WILL ONLY OCCUR BASED ON A <br />REVIEW BY THE DIVISION AND A DETERMINATION THAT THE SYSTEM IS <br />SUCCESSFUL. <br />II. Surface Water Monitoring - Rule 4.05.13 <br />The applicant will conduct monitoring of surface water in a <br />manner approved by the Division. The monitoring plan was <br />submitted under 2.05.6(3)(b)(iii) and includes the following: <br />NPDES discharge samples will be checked for pH, settleable <br />solids, and flow on a monthly basis at the ponds located at <br />the base of the pit, below the facilities area, and below the <br />area where the exp]osives magazine was previously located. <br />(NPDES discharge points 001, 002, and 003). Quarterly <br />samples from these ponds will be analyzed for Fe, Mn, pH, EC, <br />TDS, sulfate, TSS, and settleable solids. In addition a <br />spring and seep survey will be conducted in June and August. <br />(4.05.13(2)). <br />III. Backfilling and Grading - Rule 4.14 <br />1. The applicant has submitted a plan for reclamation of excessive <br />rills and gullies. This plan was approved by the Division during <br />the previous permit term and will continue in effect throughout <br />this next permit term. <br />During reclamation the post-mining topography of the mine pit was <br />configured in such a manner so as to create a relatively flat area <br />and correspondingly steepened areas, to better serve the approved <br />post-mining land use. The permittee prepared a geotechnical <br />analysis which indicated that such a modification would not present <br />a significant risk to overall geomorphic stability of the <br />backfilled area. The Division determined that these topographic <br />alterations would not alter the findings presented in the <br />Division's Cumulative Hydrolic Impact Statement, contained in the <br />May 26, 1983 Decision Package. The topographic alterations did not <br />change any drainage patterns or otherwise affect the surface water <br />or ground water hydrologic regime. The analysis indicated that the <br />possibility for shallow surficial failures would increase. For <br />this reason the Division felt it is prudent to require the <br />following stipulation: <br />-14- <br />