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Surface Water gUmmarv <br />• <br />Loner than average precipitation the past four years (see Table 2, Appendix A) have <br />resulted in lou stream floes and NPDES discharges. No changes in eater types were noted <br />at sites monitored during 1990. TDS values at most monitoring sites have increased, in <br />part due to the extended drought conditions. An increase in mining areas have also <br />contributed to increases in TDS values at the NPDES 004 and 008 sites. TDS values at the <br />NPDES 003 site have slightly increased due to drought conditions and the operation of the <br />truck cash system. TDS values at the NPDES 002 site remain relatively constant since this <br />area has been completely mined out. , <br />References <br /> <br />American Public Health Association <Ed. ). 1985. "Standard Me[h ods for the Examination of <br />Nater and Nasteuater", 16th Edition, Nashington, D.C. <br />Colorado Department of Health. 1986. "The Basic Standards for Ground Nater•Draft Copy <br />(April)". <br />i <br />1986. "CLassifications and Numeric Standards-Upper Colorado River Basin and North <br />Platte River (Planning Region 12)". <br />Office of Surface Mining Reclamation and Enforcement <br />Statement, OSMRE-EIS-25". <br />1989. "Draft Environmental Impact <br />23 <br />