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<br /> <br />' Orthophosphate/Nitrite <br />Historically, orthophosphate (Figure 33) and nitrite (Figure 34) values obtained over the period of record have been <br />' low with most being below detection limits (Appendix B). However, TR-I.5 orthophosphate and nitrite concentrations began <br />rising in 1998 and peaked in May 1999. Subsequent samples collected from TR-I.S show a decrease in both orthophosphate <br />' and nitrite. Concentrations in TR-I.5 remain above historical values. The reason for these results is not readily identifiable; <br />however, one contributing factor may be TR-I.5's proximity to active agricultural land. <br />' Chloride/Potassium <br />' Chloride and Potassium (Figure 35) were added to the parameters list in 1994. While any trend analyses for these <br />parameters is considered speculative some observations can be made. Fluctuations in the concentrations of these parameters <br />for each location are consistent with the Fluctuations observed in other parameters for each given location. <br />1 <br /> <br />1 <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br />43 <br />