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• Pigure 11. Surface Water Sulfate <br />Sulfate: 1993 - 1995 <br />• <br />goo <br />600 <br />500 <br />aoo <br />E <br />300 <br />200 <br />100 <br />0 <br />Jan-93 <br />Sulfate: 1986 - 1995 <br />u <br />Hof <br />60( <br />50( <br />a0( <br />.v <br />30( <br />20f <br />Jan-96 <br />100}~'~I ~ ~ ~ ~~~„ I~I~I~I~I~~I <br />Janl-86 Jian-87 Jan-BB Jan-89 Jan-90 Jan-91 Jan-92 Jan-93 Jan-94 Jan-95 Jan-96 <br />-~-TR-A -QTR-B QTR-C ~-TR-D <br />18 <br />Jan-99 Jan-95 <br />QTR-A -QTR-H +TR-C ~-TR-D <br />