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• TDS, conductivity and major constituents tend to increase as the ground-water <br />contribution becomes a larger portion of the flow. The values, in general, are within natural <br />ranges but some inceease over baseline has likely occurred at NPDES site 001. No long- <br />term trends are indicated by the major wnstituents except for NPDES site 001, which may <br />have stabilized after several years of generally increasing. <br />5.3 OTHER CONSTITUENTS <br />Feld pH values for all sites were very similar in 2003 to previous data. Values <br />typically ranged from near neutral to 9 for pH values at NPDES site 001. Other constituents <br />analyzed showed I'~ttle change with all minor constituents within their natural ranges. All <br />values addressed in this report above permitted discharge levels have been addressed in <br />the quarterly NPDFS discharge reports (DMR's) and justifications for those values, i.e. storm <br />water, snow cover melt-out, etc., have been submitted to the proper regulatory authorities. <br />The iron concentrations observed in 2003 in the surface water for this readily available <br />constituent were bwer than normal due 1p the low flow rates. <br />• <br />5-3 <br />