PERMFILE72810

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 4/13/1998
• Doc Name: 1997 Annual Hydrologic Report
• Section_Exhibit Name: Appendix W 1997 Report Section 2.5
• Media Type: D
• Archive: No

5.2 CONDUCTIVITY •
The conductivity versus time plot for site NPDES 001 shows a similar range of
conductivity in 1997 to the range observed the last few years (Figure C-21). The flow
versus conductivity plot for NPDES site 001 does not show the expected relationship of
decrease in conductivity for increase in flow (Figure C-22). The observed 1997 conductivity
data is similar to that observed in previous years in Johnson Gulch (001) runoff water
quality.
Figure C-23 presents conductivity concentrations versus time for NPDES site 002.
As seen in previous years, there is a decrease in conductivity in spring due to increased
runoff, and then conductivity rises sharply when the flow decreases. Figure C-24 shows
a good inverse relationship between flow and conductivity for the data for this site.
No additional laboratory conductivity values were measured for sites 005 and 006 •
for 1997 because only seep samples were collected (see Figure C-25). Figure C-26 shows
a general decrease in conductivity with increase in flow but the conductivity varies over a
large range at low flow values.
The conductivity values for NPDES sites 011 and 013 range from approximately
500 to 2000 Fmhos/cm (Figure C-27). Flow versus conductivity for sites 011 and 013 are
presented in Figure C-28. Figures C-29 and C-30 present conductivity versus time and
conductivity versus flow for NPDES sites 015 and 017. The limited 1997 data for sites 015
and 017 do not illustrate the inverse relationship between flow and conductivity.
Conductivity of water for site S1 has been fairly steady with time (Figure C-31).
The limited 1997 data fits the band of conductivity versus flow for the S1 site (see Figure
5-2
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