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Summary Findings <br />Pursuant to 4.05.8(3), temporary storage of acid or toxic forming spoil may exceed <br />30 days if the operator demonstrates that burial or treatment is not feasible within <br />30 days due to weather conditions or other specified factors, and will not result in <br />material risk of water pollution or other environmental damage. If deemed <br />necessary by the Division based on the quantity, location, and chemical <br />characteristics of any temporarily stored acid-forming ortoxic-forming spoil, such <br />spoil shall be placed on impermeable material. <br />Based on data included in annual reclamation reports, spoils exhibiting acid or toxic <br />fomting potential or other chemical unsuitability, have not been replaced on the <br />surface. Avery low percentage of samples (primarily final highwall locations) <br />have indicated excessive clay content. Such high clay areas are ripped during <br />regrading operations to relieve compaction. No indication of the presence of <br />acid forming or otherwise deleterious regraded spoil has been found by the <br />Division during mine inspections. <br />Based on the baseline data and assessment provided in the permit application, <br />monitoring commitments described for both the Wadge and Wolf Creek/Sage Creek <br />spoils, and monitoring results and observations to date (June 2006), the operation <br />is in compliance with performance standards related to acid forming and toxic <br />forming spoil. <br />E. Surface and Ground Water Monitoring <br />Ground Water <br />Tab 7 of the permit application contains baseline ground water hydrology <br />information. Section 7.1 contains the baseline information for the original permit <br />area, while Section 7.2 contains updated information for the Seneca II-W South <br />Extension Area. The ground water information section of the application was most <br />recently updated in 2002 in association with Permit Revision No. 3 (PR-3). Tab 15 <br />describes the operational ground water monitoring program. The current hydrologic <br />monitoring program is presented in Appendix 15-3a of the permit application <br />package, updated in association with PR-3, and TR-52, in 2005. Monitoring <br />locations are shown on Exhibits 7-1 (for the original permit area) and 7-IA (for the <br />South Extension Area). TR-52 revised the ground water parameter parameter <br />list. <br />Ground water studies in conjunction with the Seneca II-W Mine site have been <br />concentrated in the Upper Mesaverde Group and alluvial aquifers. Specifically, <br />Seneca II-W Findings Document 32 June 12, 2006 <br />Permit Renewal No. 5 <br />