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Wells PAW-1 and PAW-2 were established to monitor the existing refuse pile at the <br /> New Elk Mine. Table 3 presents the range and mean for field parameters collected over <br /> the 1984 water year. The main difference was an increase in conductivity from a mean of <br /> 325 at PAW-1 to 581 at PAW-2. Water in both wells is a calcium-bicarbonate type (Figure <br /> 8) with total ions measured at 7.25 and 13.60 me/l at stations PAW-1 and PAW-2, <br /> respectively. Metals analyzed for PAW-1 were near or below detection limits while boron, <br /> lead and manganese were elevated at station PAW-2. <br /> Wells PAW-5 and PAW-6 were established to monitor the Golden Eagle Mine. <br /> Analyses of all water chemistry parameters at PAW-5 were similar to those of PAW-1 <br /> indicating negligable effects of the New Elk Mine on the Purgatoire alluvium. Table 3 <br /> presents the range and mean for field parameters measured. Again, the major difference <br /> was observed in conductivity from a mean of 368 to 710 umhos at stations PAW-5 and <br /> PAW-6, respectively. Total ions measured also increased from 8.16 me/1 at PAW-5 to <br /> 19.16 me/1 at PAW-6. Figure 8 shows that the water in PAW-5 is a calcium-bicarbonate <br /> type while that of PAW-6 is more a sodium-bicarbonate type. Metal concentrations in <br /> both wells were near or below detection limits. Changes in water chemistry may be <br /> attributed to the Golden Eagle Mine Discharge and refuse disposal in Ciruela Canyon. <br /> Wells located in Apache Canyon (ACAW-1) and Ciruela Canyon (CCAW-1) were <br /> monitored following their installation in April. Station ACAW-1 is a calcium-bicarbonate <br /> type water (Figure 8) and exhibits chemical parameters typical of side canyon water <br /> quality. Station CCAW-1, on the other hand, is a sodium-bicarbonate type water <br /> exhibiting chemical parameters more like those of the Golden Eagle Mine Discharge. <br /> Geologic studies of Ciruela Canyon show the alluvium to be shallow and some infiltration <br /> of mine discharge water may be expected. <br /> 3.3 Hydrologic Consequence <br /> Analysis of potential impacts associated with mining and refuse disposal have been <br /> completed and are contained in the 1981 mine permit application and the permit <br /> application revision for the preparation plant (February, 1984). Of particular concern are <br /> changes in the water quality and quantity of the Purgatoire River and side canyons within <br /> the permit and adjacent areas. <br /> -21- <br />