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0.18 _._- -_-_.-___ ----- <br /> 12 <br /> 0.140.12 ---- _-__ <br /> 10 <br /> I � <br /> I <br /> 0.1 �- -- — 8 <br /> f <br /> 0.08 ---- — <br /> 6 <br /> 0.06 <br /> I � <br /> 0.04 <br /> I I <br /> 0.02 <br /> 1 _ <br /> 0 <br /> 8 8 s o o s e o 0 <br /> .. .. .. .. .. .. .. �. .. �. �. �. �. �. .. � tip. .. .. <br /> --.-WCMW 3-134 -.-WCMW&234 -+-Precip —Poly.(WCMW 3134) —Poty.(WCMW 6-234) Poly.)Predp) <br /> Figure 17: Manganese and precipitation data for Wilson Creek monitoring wells. Third order polynomial trends <br /> have been fit to the data to aid in recognition of correlations. <br /> Field pH and precipitation data are shown in Figure 18. Precipitation correlates positively with pH in both <br /> wells, suggesting rapid recharge of groundwater. It is evident that pH has been slowly increasing since <br /> early 2012, but the rate of increase is very low. <br />