2013-03-06_REPORT - C1982057 - Laserfiche WebLink

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plot .indicates an increasing trend; however, the peak value occurred in June 2011. Spring S -47 was first discovered by SCC personal in 1989 and was monitored first in June 1990. It is a developed spring existing alongside the mine entrance haul road just to the west of the Seneca II- W Meteorological Station. This spring became part of the required monitoring program in 2000. Its TDS plot indicates an increasing trend; however, the peak value occurred in July 2011. Spring S -50 is the discharge of the french drain that collects water from the W -24 series monitor wells (located below Pond 16A) that failed in 2003. This water was first sampled in September 2005. The W -24 wells were finally abandoned in August 2007. The entire area around this spring was regraded in 2012. Its TDS plot indicates a decreasing trend, with the peak value occurring in July 2009. Spring S -7 in an alluvial clearwell located adjacent to Hubberson Gulch. It serves as the non - potable water supply at the Smith ranch. Due to the taste and possible colifcrm contamination of the spring, bottled water is used for drinking. Sampling at this spring was discontinued in 1990, but was reestablished in 1999 since it is downstream of mining at the Seneca II -W South area. Its TDS plot indicates an increasing trend; however, the peak value occurred in September 2006. The hydrology monitoring program at the Seneca II--W Mine requires a spoil spring survey every year after the spring snowpack runoff. Spoil Spring 1 (WSSPGI, not to be confused with WSPG1) was discovered in 1998 above the NPDES 005 pond (D pit area). It existed approximately 800 feet southeast of Well GW- S2W -14W. Its TDS plot indicates an increasing trend, with the peak occurring in June 2011. Spoil.Spring 2 (WSSPG2) was discovered in June 1999. It is located in the main stream channel above Pond 006 adjacent to the oil well. Its TDS plot indicates an increasing trend, with the peak occurring in July 2011. 18