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• <br />STEVEN'S GULCH <br />COLLWIAL WELLS <br />Five colluvial wells are completed in Steven's Gulch colluvium. <br />Plots of the water levels are presented in Figures 3 through 7 and <br />a plot of the field conductivity is presented in Figure 8. <br />Summaries of the of the water quality data for the five wells are <br />presented in Tables 6 through 15. <br />The water quality data from these five wells indicate a Calcium <br />bicarbonate water type. Higher composition of sodium and sulfate <br />appear in the two wells, SM-3 and SM-9, exhibiting higher TDS and <br />• conductivities. Well SM-3 located within colluvium on a tributary <br />to Stevens Gulch and well SM-9 is located in the colluvium and <br />slope wash deposits downstream of the Stevens Gulch water supply <br />well field. The higher 504, Na and TDS in well SM-3 is apparently <br />due to differences in the geochemical equilibrium for water in <br />contact with colluvium and weathered bedrock derived from the <br />location of this well in comparison with Wells SM-8 and SM-2. <br />Wells SM-1, SM-2, and SM-8 also show a general trend of increasing <br />conductivity from upstream to downstream. The much higher sodium, <br />sulfate and dissolved solids noted in well SM-9 reflects not only <br />this trend but also differences in geochemical conditions in the <br />colluvial and slope wash material. All five wells show an overall <br />. decline in the conductivity during 1990 which was maintained during <br />3 <br />