REP09943 - Laserfiche WebLink

Home Browse Search

The discussion mentions that all aquifers prior to mining at the Seneca II-W Mine have exhibited several parameter concentrations in excess of both irrigation and livestock standards compared, rendering them questionable regarding their suitability for either irrigation or livestock. All bedrock aquifers affected by mining have been determined to have transmissivities less than 100 ftz/day, which would also preclude their use for yielding sufficient water for irrigation, or even livestock. Surface Water A summary of surface water monitoring sites and sampling history is presented in Table 7. At Seneca II-W, all stream sites (unless otherwise noted) are monitored monthly (excluding November to February) for flow and field parameters (flow, temperature, pH, and electrical conductivity). NPDES Discharge Points 015 and 016 are monitored weekly (when accessible by truck) for flow and pH. All five NPDES sites are monitored monthly for NPDES parameters and field parameters. Samples obtained at all NPDES and stream sites are analyzed for the surface water parameter list, Table 8, during April, June, and September. Springs are monitored semiannually (once in April-June, then again in September-November) for flow, field parameters, and, if flow exceeds five gpm, the surface water parameter list. Monitoring frequencies for surface water sites may be found in Appendix 15-3a of the Seneca II-W PAP. All surface water data is found in Appendix E. Data for each site begins with a flow hydrograph of all historic data (plus an annual hydrograph for NPDES sites), followed by a listing of individual water quality and quantity data for the current water year, followed by remarks if present. This is followed by a TDS regression plot using the LOWESS method (see the Ground Water Quality section), and a listing of historic percent milliequivalent values for major ions and TDS values. A statistical report representing baseline (i.e., premining) data for each site downstream of mining (when available) is provided in Appendix E1. On this statistics report, "censored data" refers to analytical values C] it 12