Laserfiche WebLink
and 10. Prior to October 1, 1989, all field conductivity values <br />collected at Seneca II monitoring sites were not corrected for <br />temperature (i.e., 25° C) . Field conductivity data starting on October <br />1, 1989 were temperature corrected to 25° C. The formula for correcting <br />non - corrected conductivity data may be found in the 1990 through 1992 <br />AHRs. <br />Peabody instituted in 1995 a new monitoring site numbering system for <br />its new ParadoxTM water quality database. This revised system is <br />detailed in Table A. For convenience sake, this table has been placed at <br />the end of the Table of Contents (see previous page). In addition, Table <br />3, Summary of Ground Water Monitoring Wells; Table 8, Summary of Surface <br />Water Monitoring Sites; and the Table of Contents of Appendices B <br />through D have all been revised to correlate the old site (and map) name <br />to the new (Paradox) computer name. The revised computer name will be <br />used throughout the following text. <br />This year PSCM completed an extensive, enhanced monitoring effort to <br />determine the sources of selenium in mine discharges, as well as within <br />the region generally. Monitoring consisted of sampling conducted at the <br />outfalls, at stream monitoring locations, spoil springs, spoil wells, <br />and natural springs. In addition, biological monitoring at multiple <br />sites was initiated in the spring of 2012, and continued into the fall <br />of 2012. Further seasonal biological surveys were completed during 2013. <br />These surveys included sampling of fish and invertebrate populations, <br />habitat quality, and tissue sampling for selenium. <br />PSCM is in the process of evaluating the data collected in the past two <br />years, and will forward it to the CDRMS when complete. This AHR will <br />only discuss data from those sites that are required in the CDRMS <br />permit. <br />The monitoring data collected is currently being assessed to better <br />understand the source and fate of selenium in order to evaluate <br />potential treatment options and techniques and to implement operational <br />modifications in order to produce effluent that meets CPDS effluent <br />6 <br />