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• 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. Well 90-2 indicated an upward trend for conductivity and alkaliniiy (see Figure 6-8) <br />through 2000, however in the year 2001 conductivity and alkalinity indicating a slight <br />downward trend. The WQ for the A-Groove (90-4) well reflects a mixture of water from <br />deeper aquifers. The initial WQ of the Perched well IRI-1 was effected by completion <br />activity but has trended toward concentrations (see Figure 6-9) similar to the down-dip well <br />89-3. Tables 6-8, 6-7, 6-8, and 6-9 present historical summary of water quality data <br />through the 2001. No significant water quality changes were noted during 2001 to indicate <br />mining effects. <br />• <br />Pressure transducers were installed in November 1990 with the data acquisition unit on line <br />in February 1991 for WL monitoring. An obstruction in IRI-1 limited water level data until <br />late in 1992. Water level data for the period of record shown on Figure 6-10 indicates <br />minor pumpage effects on the A-Groove and B-Groove aquifers. The following table <br />presents a summary of potentiometric water level data (from ground surface) for <br />monitoring wells up-dip of solution mining activity: <br />• 53 <br />