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v.8.7.009. EPA <br /> TIME SERIES <br /> 90- <br /> 60- <br /> v <br /> 0 <br /> -18 <br /> a <br /> 30- <br /> 0 <br /> Jul 1992 Sep 1996 Dec 2000 Feb 2005 May 2009 <br /> Constituent: Potassium (mg/L) Facility: Forward LF Data File: FORWARD3 <br /> Date: 6/10/09, 11:31 AM Client: Forward LF View: Batch <br /> ERST & ASSOCIATES, INC <br />