2013-10-17_PERMIT FILE - C1982056A (4)

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(D) Monitoring for additional water quality constituents may be required b the Division based upon site - specific conditions. approved postmininQ land use. or for good cause shown. HYDROLOGIC MONITORING PROGRAM TCC will conduct a program of surface and ground water monitoring in the Foidel Creek Mine Permit and adjacent areas. A detailed discussion of monitoring procedures and the schedule for monitoring activities is presented as Exhibit 14, Hydrologic Monitoring Plan. Monitoring activities will continue on a regular basis until the effects of mining- related activities have been determined to have stabilized and are within acceptable limits, as determined from water quality criteria, and until approved to be reduced or terminated by the CDMG. The monitoring program conforms with all applicable State and Federal laws and will provide a continuing means of detecting and measuring any changes in the area hydrologic environment. Hydrologic monitoring activities will address the quality and quantity of both surface and ground water systems. Hydrologic monitoring sites will be accessed from dedicated lught -use roads or pre- existing County or ranch roads. Ground Water Monitoring Ground water monitoring in the permit and adjacent areas will involve measurement of ground water levels on both a semi - annual and quarterly basis and collection of ground water physical data and the sampling and analysis of ground water chemical constituents on both a semi - annual and quarterly basis. Ground water monitoring activities will encompass bedrock ground water and shallow alluvial ground water. The monitoring well locations are shown on the Hydrologic Monitoring Plan Map (Map 13A). Semi - annual ground water sampling of bedrock wells and quarterly sampling of alluvial wells will involve measurement of ground water temperature, pH, and electrical conductivity, and collection of the necessary samples for chemical analysis. Standard EPA calibration and measurement methods will be used for all ground water measurements in the field. Acceptable techniques will be used to ensure the collection of representative ground water samples from wells. Water samples will be analyzed by a qualified laboratory using standard ASTM or EPA approved test procedures. Ground water analysis will involve measurement of the selected parameters and chemical constituents listed in Exhibit 14, Hydrologic Monitoring Plan. A 1995 water monitoring well was drilled to replace FCM #2, which has failed. The well, 95M005, will monitor the Trout Creek sandstone. After completion of the well, the site was reclaimed, the topsoil replaced, and the site reseeded with the appropriate seed mixture. Surface Water Monitoring Surface water monitoring will address the quality and quantity of area streamflows. Collection of the necessary monitoring information will involve the following activities: Sampling and collection of flow and field parameters; 12 per year during the period of March through September. Collection of 4 samples per year for full -suite analysis. Typically, flow measurements will extend from March into September. This period corresponds with the beginning of the major runoff period and continues into the low -flow period. The measurement frequency is given in Exhibit 14, Hydrologic Monitoring Plan. Continuous measurements of streamflow and water stage data for Foidel and Middle Creeks will be available from surface water gauging stations maintained by USGS -WRD. Stream sampling activities during periods of active flow will involve measurement of stream temperature, pH, specific conductance, and collection of the necessary samples for chemical analysis. It is anticipated that water percolating through the upgradient spoil, together with a small amount of runoff from the adjacent area, will enter into the Area 2 Pit and the combined amount will be sufficient to cause overflow from the pit to Pond D. In order to measure the overflow, a cutthroat flume has been installed in the channel which connects the pit and Pond D. The point between the pit and Pond D has been designated as Site 7 and is PR09 -08 2.05 -168 04/29/09