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C~ LABORATORY PARAMETERS (continued) GROUNDWATER SURFACE WATER Sodium (dis.) Sodium dis.) m /I Sodium Adsorption Ratio Sodium Adsor lion Ratio Sulfide tot. rec.) m /I Sulfate (dis.) Sulfate (dis.) m /I Cation/Anion Balance Cation/Anion Balance percent Total Dissolved Solids 180°c Total Dissolved Solids 180°c m /I Total Dissolved Solids, Calculated Total Dissolved Solids, Calculated mg/I Total Suspended Solids m /I Groundwater Monitoring -New Horizon 2 Mine In anticipation of the New Horizon Mine's migration to the west-northwest and toward an area not currently being monitored forgroundwater parameters, WFC submitted a minor revision application • (MR112) to DMG for the installation of six groundwater monitoring wells, three up dip (northeast corner) and three down dip (southwest corner) of the projected future areas of disturbance. See Map 2.04.7-1-A (Exhibit 7-1 ). WFC also submitted a technical revision application (TR-38) to revise the hydrological monitoring program as follows: Begin monitoring of the six new groundwaterwells (GW-N41, GW-N42 and GW-N43 up dip, and GW-N44, GW-N45 and GW-N46 down dip). Table 2.04.7-1 shows the frequency and parameters to be monitored. After the initial monitoring of each of the six (6) holes, the old monitoring holes GW-N13, GW-N 14 and GW-N15 will be abandoned. Abandonment reports will be submitted to DMG. Once the monitoring of newwells begin, monitoring ofthe existing wells GW-N16, GW-N17, GW-N18, GW-N36, GW-N37 and GW-N38 in New Horizon 2 Mine will be discontinued. However, these wells will be kept open and ready to resume monitoring when New Horizon Mine applies for a Phase 3 bond release of the area monitored by these wells in order to collect data required by DMG. Continue monitoringoftwoalluvialwellsGW-N39andGW-N40. The upstream alluvial well is located in the flood plain near Lincoln Street in the southeast cornerofthe minewhile the • (Revised 6128/01) 2.04.7-43