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Ground Water Quality Summary. TDS values at eight out of the nineteen <br />wells sampled the year displayed increasing TDS trends. TDS trends at <br />all other wells were either stable or decreasing. CDPHE agricultural <br />ground water standards for pH, fluoride, iron, lead and manganese were <br />exceeded at certain monitoring wells. In the area surrounding Seneca <br />II, ground water is not being pumped for irrigation or livestock <br />watering purposes, nor has the CDPHE classified any aquifer in this <br />region for any use. The above discussion is provided only to serve as a <br />comparative basis to judge ground water quality. Domestic wells that <br />provide drinking water for local residents are not from aquifers <br />impacted by mining. <br />Surface Water <br /> Table 7 lists pertinent information on all NPDES, stream, and spring <br /> monitoring sites at the Seneca II Mine. A complete description of the <br /> surface water monitoring program may be found on Pages 7-336 to 7-355 of <br /> the Seneca II PAP, and is summarized on pages 7-349/350. The NPDES <br /> permit may be found in Appendix 7-2. All NPDES Discharge Points are <br /> monitored monthly for field parameters (flow, temperature, pH, and <br /> electrical conductivity) and NPDES lab parameters. Stream Monitoring <br /> Sites SSG1, SSG2, SSG3 and SSLGS are sampled three times a year for <br /> field parameters and full-suite water quality. The first sample of the <br /> year is collected during the spring runoff (March or April), the second <br /> sample is collected after the spring runoff (May or June), and the third <br /> sample is collected during base flow conditions (September). Full-suite <br /> lab samples collected at all these sites were analyzed using the surface <br /> water long list, Table 8. The two stream sites on Fish Creek (Sites <br /> SSF11 and 13), and the two on Fish Creek tributaries (Sites SSC10 and <br /> SSB12), are monitored monthly from May through July for field parameters <br /> and full-suite lab samples. When no flow is observed at both the Cow <br /> Camp and Bond Creek sites (Sites 10 and 12) , the two Fish Creek sites <br /> (Sites 11 and 13) are not monitored. At the Seneca II Mine, there are <br /> ten spoil springs that are monitored for field parameters and full-suite <br /> l <br />i <br />th <br />i <br />l <br />b <br /> ng season. <br />samp <br />n <br />e spr <br />a <br />es <br />9 <br />