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' Edward G GaUiff S 13 887 6061 �zg 1/6/95 (r 2 19 P?.i 9/12 <br /> TreeMedcation on the nitro cn contaminant plumes and provide <br /> coatarrunation in the downgradient illustrations, of the potential effectiivenetr <br /> I aquifer Two sources of cnntaminatinn of TreeMediarion and the purnptng <br /> are suspected and arc graphically capacity of the trees Doth citrate and <br /> distinguishable Figures 4 and 5 show an ammonium concentrations were reduced <br /> apparent contraction of both to less than 10 mgfL in 199.3 at locations <br /> farthest from each sourcc <br /> Figure S. Changes in the Ammonium Contaminant Plume Two Years After <br /> Initiating the T'reeMediatwn Process <br /> AMMONIUM <br /> I <br /> 199211993 <br /> I <br /> I <br /> 400 <br /> feet <br /> 1 <br /> 1 Sou Source 2 <br /> I <br /> I1992 Axa of 1993 Arra of <br /> NH4> 'Go ispm NH4> 104 pprs <br /> 1 <br /> 0 Bores LADcaupn <br /> 1 T <br /> Groundwater <br /> Flow <br /> Rcmcdzation lournat Article &a Oadiff Pti-D <br /> Summer 1994- Draft Cay Page 7 <br /> 1 <br />