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• The findings of the Colorado Mined Land Reclamation Division for the new Carbon <br />Junction Mine permit (under Oakridge Energy, Inc.) in 1993 updated the surface and <br />ground water monitoring program requirements. Briefly, these updated requirements <br />stated: <br />Wells will be monitored monthly for water levels and quarterly for full suite <br />water analysis until the third quarter of 1994. From 1994 on, wells will be monitored <br />semi-annually for full suite water analysis and monthly for water levels. <br />Springs will be monitored quarterly through the second quarter of 1994. From <br />1994 on, springs will be monitored semi-annually for full suite water quality <br />parameters. Springs will also be monitored monthly for flow, temperature, pH, and <br />conductivity. <br />In order for the Carbon Junction Mine to present a thorough profile of surface and <br />ground water conditions at the mine site, a full suite water analysis has been performed <br />quarterly for wells and springs in the 1995 water year. Wells monitored include 10-B, <br />11-B, 17-B, and 94-1. Springs monitored include REA SPG #3 and CJ-LO-SPG #4. <br />Ground water monitoring well locations were chosen because they best afforded an <br />overview of probable hydrologic consequences, and reflect up-gradient, mid-mine, and <br />down-gradient positions. <br />• SAMPLING METHODS <br />To ensure sampling consistency, Jim Hendricks of Oakridge Energy, Inc. has collected <br />all water samples at the Carbon Junction Mine. All water samples have been tested at <br />the CDS Laboratory in Durango, Colorado. <br />Grab samples for the wells were taken by lowering the sample bottle into the wells with <br />a rope attached to a piece of PVC pipe. When the sample bottle reached the water it <br />was filled and retrieved. Appropriately sized and labeled bottles for ground water <br />sampling were obtained from the CDS Laboratory prior to sampling. <br />Depth to water was measured by a depth meter that was lowered down the well on a <br />spool. The meter indicated it had reached the water by a beep (generated by an electric <br />current), and the measurement was taken. Meters were also used to determine pH, <br />temperature, and electrical conductivity from the grab samples. <br />Grab samples were collected from the springs as close to the visible source of water as <br />possible in an area of undisturbed flow. Appropriately sized and labeled bottles for <br />surface water sampling were obtained from the CDS Laboratory prior to sampling. <br />Flow measurements were derived for the springs by visually estimating the amount of <br />• water flowing from the springs in gallons per minute. <br />2 <br />