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Page 4-14B <br />The increase in water level is directly attributable to a period <br />• of double the normal annual precipitation during the last four <br />years. The vegetative community in the area would suggest that <br />normal annual precipitation should be from 12 to 14 inches per <br />year. As shown on Page 2 of Table 4.5-1s; precipitation over the <br />last four years has averaged 25.09 inches per year. The data on <br />Table 4.5-1s were collected by the Grand Junction District office <br />of the US bureau of Land Management. The rain gage is located in <br />Ashford Canyon approximately 4.5 miles North of Munger Canyon. <br />Groundwater quality during the year of supplemental sampling seams <br />to be nearly the same or slightly better than the original <br />baseline data. This response is not unexpected given the <br />increased precipitation in the last four years. The original as <br />• well as supplementary data are summarized for each well in Table <br />4.2-2s. Monitoring well GW-7 was installed in the alluvium of a <br />side valley of East Salt Creek to monitor the effect of a proposed <br />refuse disposal area. The well was dry when installed but did <br />exhibit water during the supplemental sampling year. The samples <br />collected showed that there is little probability that the water <br />could be harmed since the electrical conductivity was over 100,000 <br />micro-mohs per centimeter. This poor water quality is probably <br />because the groundwater is associated with a perched aquifer in <br />the Mancos shale. <br />After completion of the additional one Year of monitoring, the <br /> <br />frequency and extent of monitoring was reduced since <br />3/23/87 <br />