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• versus flow for NPDES site 017. The limited 2000 data for site 017 is similar to the limited <br />data obtained at this site. <br />Conductivity of water for site S-1 had been fairly steady with time (Figure C-23). <br />The average data for the last four years are less than the average for the previous period <br />for the S-1 site. TDS, conductivity and major rnnstituents tend to increase as the ground- <br />water contribution becomes a larger portion of the flow. The values, in general, are within <br />natural ranges but some increase over baseline has likely occurred at NPDES sites 001 and <br />011. No long-term trends are indicated by the major constituents except for NPDES site <br />001, which is presently increasing with time. <br />5.3 OTHER CONSTITUENTS <br />• Field pH values for. all sites were very similar in 2000 to previous data. Values <br />typically ranged from near neutral to 9 for pH values at NPDES site 001. Other <br />constituents analyzed showed little change with all minor constituents within their natural <br />ranges. All values addressed in this report above permitted discharge levels have been <br />addressed in the quarterly NPDES discharge reports (DMR's) and justifications for those <br />values, i.e. storm water, snow cover melt-out, etc., have been submitted to the proper <br />regulatory authorities. The iron concentrations observed in 2000 in the surface water for <br />this readily available constituent were lower than normal due to the low flow rates. <br /> <br />5-3 <br />