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Electrical Conductivity (EC) Electrical conductivity (EC) is directly related to the concentration of ions in the water. As would be expected, the springs overall show decreased electrical conductivity readings during the high flow conditions of late winter and early spring and increased values with decreased flow. EC values during the 2002 water year were lower than those from prior water yeazs. Total DissoWed Solids {TDS) and Total Suspended Solids (TSS) Total dissolved solids (TDS) concentrations were slightly elevated in spring dischazges during this water year when compared to readings from prior water years. TDS concentrations decrease with overall flow decrease, temperature increase, and pH increase at both springs. Total suspended solids (TSS) concentrations remained low in Spring 3 this water yeaz. Spring 4 revealed a spike in TSS concentrations during the first quarter of this water yeaz, with a concentration outside the normal range. Whether this represents a trend, or potential contamination of the sample remains to be determined. During the 2002 water year concentrations of the major ions (alkalinity, bicarbonate, calcium, chloride, magnesium, manganese, and sodium) remained within observed historic ranges or slightly below historic ranges. Values vary for constituent concentrations between the springs, therefore brief descriptions of the trends will be presented. Alkalinity (as CaCO3) Alkalinity concentrations vary relatively widely for both springs. Spring 3 has values ranging from 348 to 455 mg/L over the past eight water years. Spring 4 has shown consistently lower concentrations than Spring 3, ranging from 242 to 440 mg/L over the same period. The average concentration has not changed significantly over this period for either spring. This water year, Spring 3 concentrations remained within past-observed ranges. Spring 4 alkalinity concentrations was the lowest recorded over this time period during the first quarter of the water yeaz. The concentration returned to within the historic observed range during the Mazch 2002 sampling. Bicarbonate Concentrations of bicarbonate at both springs have slightly decreased over the past eight water yeazs. With one exception, the highest concentrations were reported during the fourth calendaz quarter of 1994 and the lowest concentrations during the first calendar quarter of 2002. Bicazbonate concentrations are higher in Spring 3 (ranging from 336 to 555 mg/L) than those in Spring 4 (ranging from 230 to 537 mg/L) ovex the past eight water yeazs. As with alkalinity, the Spring 4 concentration was the lowest recorded during the first quarter of the water yeaz. The concentration returned to within the historically observed range during the March 2002 sampling. La,bon Juncclon Mine Pye 5 Mnual f~ydrobglc geportfor WaeerYnr2002