2017-02-03_PERMIT FILE - C1980004A (8)

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Table N-1 PHC East Salt (2003-2007) Creek SW -1 The combined discharge generally improves the conductivity of East Salt Creek surface waters. However, in 2005 there was a slight increase, but the 0.2% increase is nearly negligible as the increase was only 4 micromhos/cm. The mass balance for the irrigation season is calculated by multiplying the flow by the conductivity and dividing by the sum of flow. See Tables N-3 through N-7 for yearly mass -balances. (Mass balance is for the irrigation season only). The East Salt Creek Alluvium is recognized as an alluvial valley floor. Data gathered over the last several water years for GW -3 demonstrates the combined discharge has not had a negative impact on the alluvial groundwater. As shown below, nearly all conductivity data recorded falls between the GW -3 baseline and the combined water average conductivity reference line. Since nearly all the data points fall below the baseline for GW -3, it is not likely the combined discharge has increased the conductivity of the alluvial groundwater. The combined discharge could only lower the conductivity of the alluvial groundwater since the PR -02 2.06-4 10/12 ivity Irri ation % % Season Increase Decrease 2003 -5.1% 2004 -18.4% 2005 0.24% 2006 -7.09% 2007 -9.24% 5 -Year mass balance -8.2% The combined discharge generally improves the conductivity of East Salt Creek surface waters. However, in 2005 there was a slight increase, but the 0.2% increase is nearly negligible as the increase was only 4 micromhos/cm. The mass balance for the irrigation season is calculated by multiplying the flow by the conductivity and dividing by the sum of flow. See Tables N-3 through N-7 for yearly mass -balances. (Mass balance is for the irrigation season only). The East Salt Creek Alluvium is recognized as an alluvial valley floor. Data gathered over the last several water years for GW -3 demonstrates the combined discharge has not had a negative impact on the alluvial groundwater. As shown below, nearly all conductivity data recorded falls between the GW -3 baseline and the combined water average conductivity reference line. Since nearly all the data points fall below the baseline for GW -3, it is not likely the combined discharge has increased the conductivity of the alluvial groundwater. The combined discharge could only lower the conductivity of the alluvial groundwater since the PR -02 2.06-4 10/12