2018-01-23_GENERAL DOCUMENTS - C1981041

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31 C1981-041 RN7 findings The Roadside Mines are required to submit to the Division an Annual Hydrologic Report that provides information on the water quantity and quality for both the surface and groundwater in the permitted area. In addition, quarterly NPDES reports are submitted to the Division and the Department of Health to comply with the current laws governing point sources. In the event of an effluent discharge that is not within compliance parameters, a written notice will be forwarded to the Division and the Department of Health. Rapid Creek and Cottonwood Creek Piezometers GWMS-01A, 01B, 02A, 02B, 03A, and 03B, monitored water levels May and September. Groundwater monitoring wells were located in both the Rapid Creek and Cottonwood Creek basins. GWMS 02a and 02b were upstream on Cottonwood Creek, GWMS 03a and 03b were upstream on Rapid Creek, while GWMS 01a and 01b were downstream on Rapid Creek (downstream from the confluence with Cottonwood Creek). These wells were placed to monitor surface subsidence impacts on creek flows in the southern permit area; therefore, water level is the only parameter measured. With the approval of SL-8 and TR-67 in 2015, monitoring of these wells was discontinued. These piezometers were abandoned and plugged in August 2016. SCC submitted the abandonment reports on September 13, 2016. CRDA Piezometers CRDA-01 through 03, and 01A; and thirty piezometers (Pz 100-107, 200-206, 300- 307, and 400-406), all on CRDA-1, were monitored quarterly for water level. “Critical levels” were defined for 100, 200, 300, and 400 series piezometers. CRDA- 04 through 06 installed on CRDA-2, were monitored quarterly for water level. The thirty, 100 through 400 series piezometers on CRDA-1 were installed in 1994 at four locations to monitor water levels in multiple zones within the refuse pile. Stability analyses performed by a consultant to the operator established “critical levels” for each of the thirty piezometers, which if exceeded, are to be reported by the operator, and may necessitate further stability evaluation and possible remedial measures. Critical level for each piezometer is listed in permit Table 18-4. Monitoring of the CRDA piezometers was discontinued in 2015 with the approval of SL-8 and TR-67. The piezometers were abandoned and plugged in 2016. All water from mine operations that is pumped through the mine workings before being discharged at the surface is to be tested annually for a full suite analysis (Table 18-2, “Annual Surface Water Monitoring Parameters”). The permittee will conduct monitoring of surface water in a manner approved by the Division. The monitoring plan was submitted under 2.05.6(3)(b)(iv) and (4.05.l3(2)). Surface water monitoring locations are shown on Exhibit 56 in the permit. Surface water monitoring will include sediment pond discharge, mine water discharge, flow from Cottonwood Creek, Rapid Creek and Coal Creek. Monthly monitoring of Jerry Creek was discontinued in September 2011 with the approval of TR-62. Annual