REP12031 - Laserfiche WebLink

Home Browse Search

suite analysis of parameters was conducted along with a field analysis of pH, temperature, depth to water, and electrical conductivity. SAMPLING METHODS To ensure sampling consistency, Jim Hendricks of Oakridge Energy, Inc. has collected all water samples at the Carbon Junction Mine. All water samples have been tested at the Acculabs (formerly CDS Laboratory) in Durango, Colorado. Grab samples for the wells were taken by lowering the sample bottle into the wells with a rope attached to a piece of PVC pipe. When the sample bottle reached the water it was filled and retrieved. Appropriately sized and labeled bottles for ground water sampling were obtained from the laboratory prior to sampling. A depth meter that was lowered down the well on a spool measured depth [o water. The meter indicated it had reached the water by a beep (generated by an electric current), and the measurement was taken. Meters were also used to determine pH, temperature, and electrical conductivity from the grab samples. Grab samples were collected from the springs as close to the visible source of water as possible in an azea of undisturbed flow. Appropriately sized and labeled bottles for surface water sampling were obtained from the laboratory prior to sampling. Flow • measurements were derived for the springs by visually estimating the amount of water flowing from the springs in gallons per minute. RESULTS -SPRINGS FOR WATER YEAR 1998 Two springs were sampled during the 1998 water yeaz. Spring 1 (Upper Carbon Junction Canyon) did not flow during water year 1998. The springs sampled were Spring 3 (REA SPG #3) and Spring 4 (CJ-LO-SPG #4). Springs 3 and 4 originate below the mine and permit area. Spring 3 (REA SPG #3) is approximately 1,000 feet south of the permit area in REA Canyon. Spring 4 (CJ-LO-SPG #4) is approximately 200 feet west of the permit area in Carbon Junction Canyon. Summaries of the data collected for the 1998 water yeaz for the springs are found in Tables 1 and 2. No spring sampling occurred during the first quarter of the 1998 water year (October - December 1997). During the second quarter (January-March) both Spring 3 and Spring 4 flowed, and sampling occurred. Spring 3 continued to flow during the third and fourth quarters of this water year, and was sampled during June of the third quarter. Spring 4 did not flow after the first quarter of this water year. Flow rates at springs 3 and 4 appear to respond to seasonal recharge. Both springs show increased flow during the first and second quarters of the water year, presumably in • response to winter recharge, and reveal decreased flow or no flow during the summer and -3-