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PR-12 Exhibit 71 13 <br />less than 0.5 gallons per minute (gpm) (HydroGeo, 2003b). The potentiometric surface of the ground water in the <br />E-Seam (Fall 2005) shows that ground water flows to the northeast at a gradient of about 4 percent and that the E- <br />Seam is dry about 6, 000 feet from the outcrop. The E-Seam potentiometric surface and surface outcrop is shown <br />on Map 1. <br />Monitoring data were collected from well SOM-23-H-2-from 1994 to 1998. Monitoring and data collection at <br />this well was re-initiated in 2005. Monitoring data have been collected continuously from well SOM-3E since <br />2003. The E-Seam ground water quality data indicate consistently high levels of TDS, iron, and manganese. <br />3.2.3 Strata Above the E-Seam <br />Well 96-2-2 is installed in the strata between the F- and E-seams and is currently being monitored. No <br />permeability data are available for this well. Monitoring data have been collected from this well since 1996. The <br />ground water quality data of the strata above the E-Seam indicate consistently high levels of TDS, iron, and <br />manganese. <br />3.2.4 F-Seam <br />Wells SOM-23-H-3 and SOM-C-76 are installed in the F-Seam and are currently being monitored. Based on test <br />data of well SOM-C-76, the calculated hydraulic conductivity of the F-Seam is 2x104 cm/sec (0.57 ft/day). <br />Monitoring data were collected from well SOM-23-H-3-from 1994 to 1998. Monitoring and data collection at <br />this well were re-initiated in 2005. Monitoring data have been collected from SOM-C-76 since 1978. The F- <br />Seam ground water quality data indicate consistently high levels of TDS and iron. <br />3.2.5 Barren Member above F-Seam <br />Well SOM-23-H-4 is installed in the Barren Member of the Mesaverde Formation above the F-Seam and is <br />currently being monitored. No permeability data are available for this well. Monitoring data were collected from <br />well SOM-23-H-4-from 199.4 to 1998. Monitoring and data collection at this well were re-initiated in 2005. The <br />ground water quality data of the Barren Member strata above the F-Seam indicate consistently high levels of <br />TDS. <br />September 2007 HrclroGeo, lire.