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• values during a record from 4/83 to 10192. The range for sulfate was 64 to 731. The <br />range for TDS was 244 to 1,900. The 1996 values for sulfate and TDS fall within the <br />minimum and maximum values documented in the 1992 AHR. <br />OVWM GROUNDWATER MONITORING WELLS <br />Well OVWM (see Map No. 4-I) was monitored semi-annually for water levels <br />only to assess stability of the West mine fill constructed over East Roatcap Creek. Well <br />OVWM showed typical water level fluctuations during 1996 within the normal range <br />established for this site. (See Tab 5 Figure 5). <br />NORTH FORK ALLUVIUM GROUNDWATER MONITORING WELLS <br />Three (3) wells, MW-1, MW-2 and MW-3 (see Map No. 8-3) are completed in the <br />North Fork Gunnison alluvium. During 1996 the wells were monitored monthly for <br />water levels and showed typical seasonal fluctuations within previously established <br />ranges (see Tab 5 Figures 6, 7, & 8). MW-1 and MW-3 were monitored quarterly for <br />. quality during 1996 to monitor potential groundwater effects stemming from the coal <br />stockpile and loadout facilities in the North Fork Valley. Well MW-1 is east of the <br />loadout in an area that should be outside or above the area of influence of the coal <br />stockpile and loadout facilities. Well MW-3 is southwest of the coal stockpile area in a <br />location that should see the full impact of any potential grotmdwater degradation. The <br />TDS level in the wells shows whether the groundwater in the area has been degraded. )n <br />1993, the TDS in wells MW-1 and MW-3 were 388 and 380 mg/I respectively. These <br />values are considered baseline values. Well MW-1 had a TDS levels of 1300 mg/1 in the <br />fu•st quarter, 401 mg/1 in the second quarter and 650 mg/l in the fourth quarters of 1996. <br />The third quarter TDS value in MW-1 were less the 380 mg/I. Well MW-3 had TDS <br />values of less than 380 for all monitoring events. This data would show that the stockpile <br />and loadout aze not degrading the water in the alluvium. <br />EAST ROATCAP CREEK COLLUViUM GROUNDWATER MONITORING <br />WELLS <br />Shallow groundwater monitoring wells' SM-5, SM-6, SM-7, SM-10 and SM-11 <br />(see Map No. 4-1) is in the East Roatcap Creek drainage. The wells were monitored for <br />• water quality parameters, water levels, and field parameters to detect impacts associated <br />Page -3- <br />