Laserfiche WebLink
with an electrical conductivity in the 1000 to 3000 umhos/cm range. The <br />pH meter is calibrated using NBS traceable buffers with pH values of 7 <br />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 />Seneca instituted in 1995 a new monitoring site numbering system for its <br />new ParadoxTM water quality database. This new system is detailed in <br />Table A. For convenience sake, this table has been placed at the end of <br />the Table of Contents (see previous page). In addition, Table 3, Summary <br />of Ground Water Monitoring Wells; Table 9, Summary of Surface Water <br />Monitoring Sites; and the Table of Contents of Appendices B through E <br />have all been revised to correlate the old site (and map) name to the <br />new (Paradox) computer name. The new computer name will be used <br />throughout the following text. • <br />Meteorological Data <br />Precipitation data was obtained at the PSCM using a Belfort Weighing <br />Bucket Rain Gage. Daily precipitation data for this year are presented <br />in Table 1. Total monthly precipitation data collected since 1981 are <br />presented in Table 2. Where indicated, data from the U.S. Weather <br />Service - Hayden Station were used. The PSCM precipitation gage measured <br />15.10 inches this year. This value is 2.96 inches (16%) below the 1981- <br />2010 average. Temperature, wind speed and direction data are presented <br />in Appendix B of the Seneca II-W AHR. The Seneca II-W Mine <br />Meteorological Station located approximately seven miles southwest of <br />the PSCM. Climatic conditions are similar between the two mines. <br />Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. These data are provided in <br />Appendix B of the Seneca II-W AHR. For this year, 17.85 inches of • <br />precipitation was measured, which is 0.51 inches (3%) above the 1971- <br />2