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1 <br />1 <br />Figure 6. <br />zs <br />20 <br />is <br />mg/1 <br />10 <br />s <br />0 <br />Aug-80 <br />o.e <br />0.7 <br />0.6 <br />0.5 <br />mg/1 0.9 <br />0.3 <br />0.2 <br />0.1 <br />0 <br />Auq-80 <br />Surface Water <br />Ne <br />Jan-82 May-83 Oct-89 Feb-86 Jul-87 <br />'e• TR-A '0• TR-B '~' TR-C '~• TR-D <br />Surface Water <br />Mn <br />Jan-82 May-83 Oct-89 Feb-86 Jul-87 <br />'e' TR-A '0• TR-B '~• TR-C '~• TR-D <br />NOV-88 <br />Nov-88 <br />