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Trends: <br />Mine Inflow <br />1. From the years 1990 to 1992 pH is gradually dropping from 8.1 <br />to avg of 7.1 (a magnitude of 10). Mine inflow stations <br />affected are numbers 4,5,6,8,14, and 17. <br />In general, inflow amounts are decreasing since 1990, but <br />should return to previous and even exceed previous as new <br />faces are mined by longwall operations in ever-increasing <br />amounts to meet new contract demands. Estimated at 100,000 <br />tons/month to begin June 1994. <br />Groundwater <br />2. When compared to data from 1990 (insufficient data from 1991), <br />mine water discharge at alluvial well PAW-7 indicates that the <br />ground water is returning to calcium bicarbonate downstream, <br />reflecting natural conditions, while increasing in sulfate <br />(from 25 to 130 mg/1) and decreasing in sodium (283 to 83 <br />mg/1). <br />Issues: The following items are Division concerns that need to be <br />addressed. <br />1. The mine dischazge data and the corresponding graph need to ~be <br />in sync as faz as representing the data from water year or <br />Georgian calendar year. Currently the graph x axis for the <br />sampling period runs according to water year while the data <br />provided run January to December. For ease of diagnosing the <br />data and compatibility of the data with the graph, please <br />revise the graph to reflect the January to December sampling <br />period. <br />Surface Water Monitorin <br />1. There needs to be more of an effort made in obtaining surface <br />flow samples from CCS-1, since this station serves as a <br />baseline for mine water and surface flow off the refuse pile <br />downstream. The operator must make a commitment to be more <br />responsible in obtaining a sample from CCS-1. If <br />precipitation patterns show approximately 14 to 16 inches <br />annually, then surely a stream catch flow sample can be <br />obtained, particularly during a summer storm event. There has <br />been no collection of data at CCS-1 since 1988, while in 1987 <br />11 months of collecting samples was possible. <br />2. More operator diligence needs to be exercised concerning <br />sampling of CCS-2; surface water station downstream from both <br />the mine water discharge NPDES point GE-002 and the refuse <br />pile. Seven months of data sampling is missing; June through <br />