Laserfiche WebLink
Introduction <br />• The following Hydrologic Monitoring Program will be initiated at the Seneca II-W Mine upon <br />approval of the II-W South Expansion Permit Revision. This program is similar to the previous <br />monitoring program (see Appendix 15-3). Changes to that program are discussed below. <br />Surface Water <br />Site FG5 is located on Sage Creek upstream of both the Seneca II-W and SCC's Yoast Mine. <br />Monitoring at this site will be deleted from this permit but will be retained at the Yoast Mine. <br />Site CGI is located downstream of the proposed Pond 015 (Sage Creek tributaryl. Monitoring <br />was dropped here in 1966, but will now be resumed. <br />Site SG16 is located at the proposed Pond 016 (Hubberson Gulch tributaryl site. Site SG17 is <br />located at the proposed Pond 017 (Hubberson Gulchl site. Site SG9 is located on Hubberson <br />Gulch upstream on Pond 017. These new sites will be added to the monitoring program. <br />NPDES monitoring frequencies have been changed from monthly to weekly as a result of a <br />proposed change to the NPDES permit (Appendix 15-4). Monitoring will remain at a weekly <br />basis until the NPDES permit is amended. <br />• S rin s <br />Springs S-7 and 5-46 were included in the original 1979 spring survey. Monitoring of those <br />springs will be resumed. Springs 5-47, 5-48, and 5-49 were discovered after that survey and <br />have been voluntarily monitored. These three springs will now included in the monitoring <br />program. <br />Ground Water <br />Wells USGS A1, A3, A8 and A12 exist in the Sage Creek alluvium at the Yoast Mine area <br />lupstream fr om Seneca II-Wl. As those four wells are part of the Yoast monitoring program <br />(referred to as YSAL1, 3, 6, and 12), they will be dropped from the Seneca II-W monitoring <br />program. <br />Wells 4W, 40V1, 4WC, and 40V2 were all part of the original Seneca II-W monitoring program <br />and were discontinued in 1 986. Monitoring a[ those four wells has been resumed. <br /> Water level monitoring at most Seneca II-W wells is five times a year (February/March, <br /> April/May, June/July, August/September, and October/Novemberl. Water level monitoring <br /> frequencies at these wells will be changed to triannually (May/June, August, and <br /> October/Novemberl. Monitoring during [he winter will be dropped due to inaccessability and <br /> <br />15-3a-1 Revised 7/99 <br />