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have been at similar values since 1988 with the exception of one outlier. Sodium values at • <br />well GF-7 have varied significantly but, overall, have been fairly steady over the last few <br />years. <br />The minor constituent variations have been erratic. No changes in these <br />constituents are thought to be attributed to mining. The 2000 radium 226 concentrations <br />have been small and the variation in radium 226 concentrations are thought to be natural. <br />6.2 SURFACE WATER <br />Peak flows for the surface water sites at Trapper Mine in 2000, even though large <br />for one September runoff event, were lower than the 1998 peaks from Spring snowmelt. <br />The precipitation in 2000 was 15.93 inches, or slightly below the 22-year average for the <br />Trapper Project. The last three years of annual precipitation have been very similar. No • <br />failures or monitoring site problems were encountered during 2000 and no compliance <br />limits were exceeded in 2000. <br />Values of total suspended solids (TSS) were generally on the low side of ranges <br />observed in previous years due even with the large September peak event. Total dissolved <br />solids (TDS) were generally in an indirect relationship with flow rate when adequate flow <br />occurred at a site to determine the relationship. The large conductivity for the high flow <br />measured at NPDES 001 in September indicates that the TDS of this event was much <br />higher than would be expected. The TDS of the surface water from the mine area is <br />similar to the TDS from the non-mined area and, therefore, an increase has not been <br />defined, except for an increase in TDS during low flow conditions at NPDES sites 001 and <br />011. The TDS, conductivity and major constituents varied over expected ranges with an • <br />6-6 <br />