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i since water level fluctuations are the smallest then. The triannual fri quency has been previously approved by the CDMG for SCC's Seneca II and Yoast Mines. This triannual frequency is still sufficient to determine both seasonal and year-to-year water level fluctui lions. Permit Revision No. 3 Changes Permit Revision No. 3, which was submitted in 2002, deals with the mining of the Sage Creek and Wolf Creek coal seams in the II-W South Expansion area. No changes on the Surface Water portion of Table 1 were made. In the Springs portion of Table 1, Spring 5-49 was deleted since that spring was mined out in 2001. In addition, Spring 5-41, located in the northeast quarter of Section 22, has been removed from the monitoring program since it no longer exists after mining in that area in 1998. Also, three spoil springs located in the north and central mining areas have been added to the monitoring program. Five new wells have been added to the monitoring program. These wells are WSOV-24 (Sage Creek coal overburden), WSC-24 (Sage Creek coal), WWCOV-24 (Wolf Creek coal overburden), WWC-24 (Wolf Creek coal), and WWCU-24 (Wolf Creek coal undc~rburden). The wells were drilled and completed in August and September of 2001. The five wells will be monitored for water levels and quality once per calendar quarter until the second quarter of 2002, at which time they will be monitored per the sequences stated in Table 1. 2005 Technical Revision 52 Changes Technical Revision 52, submitted in 2005, deals with changes to the hydrological monitoring program. In this appendix, Table 1, monitoring at Site SW-S2WSG17 will be discontinued. It was the baseline site for Pond 017, which is now built. Monitoring at Site SW-S2W-SG7 will be changed from monthly to triannual. in the Springs section of Table 1, monitoring at S-5 (Pond 006 basin) will be discontinued. This "spring" is actually an ephemeral stream channel. Since 1983, flow has been observed only three times at this site. Monitoring at Spring S-1 (Pond 009 basin) will also be discontinued. This "spring" is also an ephemeral stream channel. Water quality data provided in 2004 Seneca 11-W AHR (pgs. E-105 and E-106) indicate that mining has had very little impact on this stream. Electrical conductivity values peaked in 1998 (1060 pS) and have decreased since then. Total dissolved solids values peaked in 1997 (680 mg/I) and have decreased since tFien. Monitoring at Spring 5-45 (Olson Ranch) will also be discontinued. This "spring" is actually a three-foot diameter culvert clearwell placed in the alluvium of Dry Creek. Since a well was drilled on the Olson Ranch in 1980, this "spring" has never been put,to use. r L_~ TR-68 15-3a-2 Revised 04/07