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• 2.05.6 <br />The flooded mine workings could also affect the ground water quality and <br />quantity in the overlying Upper and Lower Perched Water Zones. However, <br />as stated above, the Mesaverde Formation transmits little water. Therefore, <br />the impact the flooded mine workings will have on the quantity and quality of <br />the surrounding strata should be minor. <br />The Rollins sandstone, as monitored in DH-34B, has pH in the range of 7.5 <br />to 8.2, conductivity in the 6200 to 8200 umhos/cm range and total <br />recoverable iron in the 2.5 to 4.0 mg/I range. Based on the quality of the <br />mine water discussed above, mine water seepage into the Rollins sandstone <br />would improve the water quality in the Rollins sandstone. <br />The perched water below the D-Seam and above the B-Seam is monitored <br />by drill holes D-58a and DH-67-D-Blw. The quality of water in this perched <br />water being zone, as reported in the 2002 AHR show pH in the range of 8.1 <br />to 11.6, conductivity in the 485 to 4600 umhos/cm range and total <br />• recoverable iron in the 1.0 to 31.4 mg/I range. Based on the quality of the <br />mine water discussed above, mine water seepage into the perched water <br />below the D-Seam and above the B-Seam would improve the water quality <br />in the perched water bearing zones. <br />The perched water above the D-Seam is monitored by drill holes D-58, 66 <br />and DH-67-D-Abv. The quality of water in this perched water being zone, as <br />reported in the 2002 AHR show pH in the range of 8.1 to 13.5, conductivity <br />in the 652 to 5500 umhos/cm range and total recoverable iron in the 0.1 to <br />17.7 mg/I range. Based on the quality of the mine water discussed above, <br />mine water seepage into the perched water above the D-Seam would <br />improve the water quality in the upper perched water bearing zone. <br />LJ <br />PR-OS <br />2.05 - 75ii - 07/03 <br />/j PVlL6YE0 <br />`~/~-s/o3 <br />