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<br />High manganese values may, in part, be due to recharge from the spoil <br />aquifer, although high values are often common, especially in alluvial <br />material (Hem, 1989, pgs. 86-89). Of t he seven wells displaying high <br />values, only three (WHAL7-2, WOV14 and WW14) are indicating an <br />increasing trend fall exist in the permit area). It should be noted <br />that, while the CDOH uses a standard of 0.2 mg/1, the EPA states that <br />this standard is used to protect crops grown in soils with a pH value <br />lower than 6.0. In soils with a higher pH (as are found in the Seneca <br />II-W region), a more appropriate standard would be 10 mg/1 (EPA, 1976). <br />This year, none of the Seneca II-W wells displayed a value higher than <br />3.26 mg/1. <br />One well, WW14, exhibited boron values, 940 and 970 ug/l, which exceeded <br />the CDOH standard of 750 ug/l. According to the CDOH, the 750 ug/1 <br />standard is set for sensitive crops (CDOH, Reg. 41, 1999), and that the <br />limit otherwise is 5000 ug/1. None of these sensitive plant species are <br />grown commercially in this area. <br />One well, WOV14, exhibited one chromium value, 120 ug/1, which exceeded <br />the CDOH standard of 100 ug/1. This value is suspected to be an error, <br />since all values since mining began were below the detection limit (10 <br />ug/1). <br />At the Seneca II-W shop well, Well 201TC, CDOH drinking water standards <br />were used to determine its suitability. No human health standards were <br />exceeded. The secondary standard for iron (0.3 mg/1) was exceeded with <br />valves of 3.84 and 6.73 mg/1. The secondary standard for manganese (0.05 <br />mg/1) was exceeded with values of 0.127 and 0.157 mg/1. However, bottled <br />water is consumed at Seneca II-W. Also, since the aquifer for the shop <br />well (Trout Creek Sandstone) starts at 280 feet below the Wadge Coal and <br />is separated by confining shale layers, water from this well should not <br />be affected by mining and, therefore, reflects the natural <br />characteristics of the aquifer. <br /> <br />12 <br />