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(Table 5) and are also the same as those used in the water quality reports. The frequency column on Table 6 indicat es the number of exceedences out of the total number of samples (i.e., 112 indicates one exceedence out of two samples). Below is a summary of standards that were exceeded. Given in parenthesis is the source and use of each standard. I Parameter Boron (CDOH, irrigation) Chromium (CDOH, irrigation) pH (CDOH, irrigation) Iron (CDOH, irrigation) Manganese (CDOH, irrigation) # of We11s / # of Excursions 1/2 1/1 1/1 3/5 7/14 In addition, a total of six samples (from WOV14, 16, 17 and WW14) had cadmium values that were less than an elevated detection limit (30 ug/1 vs. a normal detection limit of 3 ug/1), which was higher than the CDOH standard of 10 ug/1. Likewise, the same samples had lead values that were less than an elevated detection limit (200 ug/1 vs. a normal detection limit of 20 ugJl), which was higher than the CDOH standard of 100 ug/l. The cause of these elevated detection limits was a decision by the laboratory to dilute the samples prior to analyses in order to reduce the effects of interferences (primarily, high salinity). Elevated levels of iron may be attributed to natural {i.e., not mining related) conditions, since elevated levels for that parameter are not normally found in spoil wells at the adjacent Seneca II Mine. The two bedrock wells (WW14 and WTC201) that often exhibit high levels may have higher than usual concentrations of iron pyrite in the rock. Well WTC201 (Trout Creek Sandstone, shop well) often displays high iron values, but does not display an increasing trend. Wadge coal well WW14 started displaying high iron values in 1998 and displays an increasing trend. The high levels of iron displayed in the one alluvial well (WHAL7-2) may be the result of organic matter and plant debris present in the alluvium (Hem, 1989, Pg• 77)~ A11 wells with high iron values exist within the Seneca II-W permit boundary.