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data for this site is presented as Table 37. A statisfical water quality summary for the site is presented as <br />• Table 37a. Hydrology monitoring requirements at this site were fulfilled during 1994. Anomalous water <br />quality instances observed at this site include a new maximum field conductivity measurement in recorded <br />in May; new maximum dissolved calcium levels recorded in May and June; a new maximum total <br />recoverable iron level recorded in April; new maximum total recoverable manganese levels recorded in April <br />and June; and new maximum nitrogen ammonia wncentrations rewrded in November and June. Spoil <br />spring 7 has not been observed to discharge since June 1994 as the low quality coal stockpile has completely <br />filled the Area No. 2 pit upstream of this site. <br />The 303 series spoil springs require monitoring on asemi-annual basis for flows, field parameters, and <br />water quality samples. During 1994; the sewnd semi-annual water quality sample was not obtained as flows <br />from the sites were measured at less than 35 gpm and the sites were erroneously handled in accordance with <br />the typical spoil spring survey applied to springs elsewhere. TCC has identified these omissions and will <br />emphasize compliance with the monitoring program to ensure the omissions are not repeated. <br />Tables 38 through 40 provide summaries of the 1994 Water Year data collected at each 303 series spoil <br />spring. Table 38a provides a period of record statistical summary of collected data at site 303-1. Figure <br />82 provides a graphical representation of period of record field conductivity for spoil spring 303-1. With <br />the exception of an elevated lab conductivity value recorded in November, all monitored water quality <br />• parameters at spoil spring 303-1 returned values within previously established ranges during the 1994 Water <br />Year. <br />MINE WATER DISCHARGE SITES <br />Two mine water discharge sites associated with the TCC operations are monitored. Site 109 requires <br />quarterly monitoring for flows, field parameters, and water quality samples, and site 115 is monitored as <br />an NPDES discharge point in accordance with the requirements set forth under NPDES Permit No. CO- <br />0042161. Monitoring requirements at both sites were fulfilled during 1009. Table 41 provides a summary <br />of the 1994 Water Year data collected from site 109. Table 41a provides a period of record statistical <br />summary of collected data at the site. Table 41b presents water meter readings at site. 109 for the 1994 <br />Water Year. Figure 82 provides a graphical representation of period of record field conductivity for mine <br />water discharged at site 109. With the exception of a slightly elevated total dissolved solids value recorded <br />in March, all monitored water quality parameters at site 109 returned values within previously established <br />ranges during the 1994 Water Year. <br />1994 Water Year data for mine water discharge site 115 is presented on Tables 42 and 42a. Table 42 <br />provides the 1994 Water Year statistical summary of wllected data and Table 42a provides the period of <br />record statistical summary. Table 42b presents water meter readings at site 115 for the 1994 Water Year. <br />Figures 84 and 85 provide graphical representations of Water Year flow rate data and field conductivity data <br />`, pa <br /> <br />