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• Figure 5. Surface Water Specific Conductivity <br />3000 <br />N <br />7 <br />~ 2500 <br />u <br />.a <br />v <br />U <br />~ 2000 <br />d <br />N <br />4 <br />0 1500 <br />N <br />~ 1000 <br />E <br />U <br />h <br />° SOD <br />0 <br />Dec-99 Dec-9S Dec-96 Dec-97 <br />fTR-A -~TR-B tTR-C $TR-D <br />• <br />3000 <br />m <br />ti 2500 <br />u <br />.ti <br />v <br />U <br />~ 2000 <br />N <br />W <br />4 <br />O~ <br />0 1500 <br />N <br />~+ 1000 i <br />U <br />r S00 <br />7 <br />0 <br />Dec-87 Dec-88 Dec-89 Dec-90 Dec-91 Dec-92 Dec-93 Dec-94 Dec-9S Dec-96 Dec-97 <br />-f-TR-A --QTR-B $TR-C $TR-D <br />• NOTE: Data circled is believed to be invalid due to equipment error. The problem <br />was corrected during 1992; data beginning September 1992 is considered to be valid. <br />9 <br />