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Mountain Coa! Company 1998 Anuual Hydrology Report West 6(k Mine Baseline monitoring continued on eight springs initiated in WY96 (15-1, 15-2, E15-3, E10-2, • E10-3, E10-4, 26-1 and 27-1) as well as spring J-4, which was re-initiated in WY96. Baseline monitoring also began on springs E14-1, 24-3, and E10-1, which were added to the program in the Box Canyon permit revision (PR08). MCC, in cooperation with the U.S. Forest Service District Office in Paonia, Colorado, has agreed to informally monitor the U.S. Forest Service surface water resources, as depicted on Map 3, that aze located directly over panels to be mined, and within the angle-of--draw per the agreement letter in Exhibit 19C of the permit. These resources are listed in Table 3. Sampling Methods Monitoring included spring flow, field pazameters, and laboratory parameters. In sampling springs, a location was selected which approximated a channel as closely as possible. A step may have been cut into the channel base to facilitate positioning of a container. Flow measurements were made by the timed volumetric method: where a field technician times the filling of a container of known volume to determine the flow rate. Several measurements were taken and averaged prior to reporting. Field parameters of temperature, pH, and conductivity were made at the springs by collecting a sample from the flowing springs and measuring the sample for the pazameters using standard instruments that were calibrated in the field. Samples for analysis of laboratory pazameters per Table 2, Footnote 2 were collected by fi!]ing a clean, pre-fixed sample bottle from non-aerated spring flow. Caze was taken to minimize any increases in turbidity. Sample bottles were sealed, labeled, placed on ice, and transported to the laboratory for analysis. • Groundwater Monitoring There were thirty-two wells in the WY98 groundwater monitoring program and are summarized in Table 4 along with the formation each of the wells monitor. Wells GP-6 and GP-7 replaced wells GB-1 and GP-1, respectively, which were destroyed during construction of the lower refuse pile in WY97. Table 5 provides more detail on the completion of each of the wells in the monitoring program. Of the thirty-two monitored wells, eight were being monitored to establish or re-establish baseline conditions during WY97. Baseline monitoring continued for wells SOM-45-H-1, SOM-H- 45-2, SOM-C-76, SOM-23-H-1, 96-2-2, 96-27-1, RAV-4b, and So.W-1 and So.W-3. In July 1998, the Division approved Technical Revision 85, which removed seven wells from the monitoring. Consequently, monitoring of wells GP-5, SOM-23-H-], SOM-23-H-2, LP-1, B-32, SOM-38-H-1, and JMB-12 ceased in July 1998. Field water quality samples were taken three times during the water yeaz at all stations if sufficient volume was present to fill the appropriate sample containers and if the well allowed access to the formation of completion. On an annual basis, all stations were similarly sampled and the samples were analyzed for a full suite of pazameters (Table 4), when conditions allowed. 31-03 .5 Page rig t Water ngineers