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of well 17-B returned to neutral from weakly acidic. Well 94-1 has remained slightly <br />alkaline since the 1995 water yeaz. The sampled value this water year was 7.6, slightly <br />lower than last recorded. We1195-1 remained alkaline, though the pH level moderated to <br />a level of 7.9 for this water year from levels at or above 8.5 during the 1998 and 1999 <br />water years. <br />Electrical conductivity (EC) levels this water year remained consistently within previously <br />observed ranges in all wells from the prior water years. Total dissolved solids (TDS) levels <br />m all groundwater monitoring wells attenuated from prior water years during the 2000 <br />water year. Well 17-B TDS levels have remained the most consistent over the past six <br />water years with little overall variability. TDS levels in well 94-1 were higher during the <br />1995 and 1996 water years and have been lower during the 1997-2000 water years, where <br />the value has remained consistently in the ±800 mg/1 range. In we1195-1, TDS levels were <br />higher during the 1997 water year and have lowered during the last three water years. <br />TDS levels in well 95-1 have remained in the 300-400 mg/I range for the past three water <br />years. <br />All the monitoring wells showed some fluctuation in ionic concentrations this water year. <br />The fluctuations were not consistent as far as the constituents that fluctuated or the wells <br />that showed fluctuations. The majority of the fluctuations were within historic ranges <br />observed for the wells over the last six water years. Notable changes are further described <br />below. <br />• In this water year's sampling of the chemical constituents of well 17-B, the only pazameter <br />that showed a noteworthy increase in concentration was chloride. Chloride concentrations <br />increased from less than 10 mg/1 in the past water year to 24 mg/1 this year. This is the <br />highest level recorded for this constituent during the past six water years, though a level of <br />20 mg/1 was recorded in the first calendar quarter of 1998. Remairting parameter values <br />recorded this water year for ammonium, bicarbonate, calcium, 'von, magnesium, <br />manganese, sodium, and sulfate remained within historical ranges and levels of fluctuation <br />recorded during the prior six water years for well 17-B. <br />Chemical constituent parameter values in well 94-1 showed a number of notable changes <br />this water year. Ammonia concentrations this water year showed a decrease in <br />concentration from the 1999 water year. The recorded value from this water year is <br />consistent with values recorded from the 1995, 1996 and early 1997 water years. <br />Bicazbonate concentrations rose slightly this water year in a trend that began in the second <br />calendar quarter of 1998. Bicarbonate concentrations remain within the historical range <br />for this pazameter. Calcium concentrations have fluctuated greatly during the last six <br />water years, and while the 2000 water yeaz concentrations are higher than the prior three <br />water years, the concentration is within the range recorded in the mid-1990's. Chloride <br />concentrations have shown a decrease over the last two water years, though the <br />significance of this may be an artifact of the detection and reporting levels changing over <br />the same time period. Magnesium and sulfate concentrations both showed increases this <br />• <br />-6- <br />