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<br />Dedicated Monitoring Wells Up-Gradient <br />Wells established to monitor up-gradient conditions are: <br />Wells Aquifer <br />IRI-1 Perched <br />90-2 Dissolution Surtace <br />90-3 B-Groove <br />90-4 A-Groove <br />The up-gradient wells were completed with water quality samplers in July, 1990 and may <br />show residual effects of prior completion problems from 1980-1990. Water quality results <br />indicate Dissolution Surface (90-2) and B-Groove (90-3) data similar to historical data for <br />WRN. The WQ for the A-Groove (90-4) well reflects a mixture of water from deeper <br />• aquifers. The initial WQ of the Perched well IRI-1 was effected by completion activity but <br />has trended toward concentrations similar to the down-dip well 89-3 (see Figure 6-8). <br />Tables 6~, 6-7, 6-8, and 6-9 present historical summary of water quality data through the <br />1998 water year. No significant water quality changes were noted during 1998 to indicate <br />mining effects. <br />Pressure transducers were installed in November, 1990 with data acquisition unit on line in <br />February, 1991 for WL monitoring. An obstruction in IRI-1 limited water level data until late <br />in 1992. Water level data for period of record shown on Figure 6-9, indicate modest <br />pumpage effect on the A and B-Grooves. <br /> <br />55 <br />