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Spring and Seep Stations During 2004, one spring was monitored quarterly for flow and field pazameters (SPJC-1). • Flow data and hydrographs are included in Appendix 3. Spring SPJC-1 had no flow, throughout most of the year. Flow was noted in August, most likely to to extensive precipitation received in the area during that month. Pond Sites In addition to the springs, seeps, and streams, ponds are also present on the site. These ponds are utilized to provide water for livestock and wildlife. A total of nineteen ponds were located by ground and aerial surveying methods (Map 2.04.7-1). A large number of these ponds (eight) are located in the Cow Canyon drainage. The other ponds are scattered over the site, with generally no more than two in any drainage. All ponds located appear to be artificial, with man-made dams at one end. Water level in the ponds varies from season to season depending on runoff received in the drainages, however, all ponds consistently hold water .One pond (PJC-1) was monitored in 2004 (Appendix 3). It was dry during the May sampling. Surface Water Quality Applicable standards for the Lorencito Canyon Mine are set forth by the Colorado Department of Public Health and Environment, Water Quality Control Commission document Classifications and Numeric Standards for Arkansas River Basin (3.2.0), effective August 30,1995. Receiving stream standards from Region 7, Lower Arkansas River Basin, Stream Segment Sa were utilized. These standards refer to the Mainstem of • the Purgatoire River and the Middle Fork of the Purgatoire from the USGS gage at Stonewall to Interstate 25. Standazds included physical, biological, inorganic, and metals. Surface Water Stations Data was collected from each of the surface water stations during the 1996 to 2004 monitoring period. Each of the stations were monitored for field pazameters and samples were obtained from the site for laboratory analyses in accordance with Table 1-1. Summary tables showing the results from all the surface water locations aze included in Appendix 2. Stations LC-1 , LC-2, and PC-1 continued to show signs of increased levels of TDS likely related to coalbed methane development. The principal water type in the surface waters is acalcium-sodium bicarbonate type. This water is typically neutral to partially alkaline, with low hardness, and low to moderate salinity, pH ranges from 7.4 to 8.7, and hardness ranges from 107 mg/L to 435 mg/L. Total dissolved solids in the samples ranged from 210 -980 mg/L (filterable residue). An increase in TDS of 10 mg/L has been noted between the upstream and downstream stations on the Purgatoire River, likely due to higher TDS discharges from coalbed methane activities in Lorencito Canyon •