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100,000 Total and Hexavalent Chromium 1 1 100,000 Iron and Manganese 1,000 Arsenic <br /> 10,000 t Iron <br /> 10,000 Manganese - - WQO for Arsenic(10 Ng/L) <br /> J - - <br /> WQO for Iron(300 Ng/L) <br /> 1,000 - - - WQO for Manganese(50 Ng/L) 100 - <br /> c 1,000 <br /> 100 - - - - - - - - - - - - - - - - - - - - - - - <br /> _ 100 c <br /> v10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ? 10 - - --f-- - - - - - - - - <br /> R .2 <br /> Total Chromium <br /> c <br /> 1 Hexavalent Chromium v 10 = <br /> — — <br /> WQO for Chromium(50 Ng/L) U <br /> 0.1 1 i i i1 1 <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan. 2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 <br /> 1,000 Sulfate 10,000 Total Organic Carbon 10,000 Total Dissolved Solids and Electrical Conductivity <br /> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1,000 <br /> J 100 -- <br /> E1,000 <br /> a� :1002 W <br /> E as in <br /> E - - - - - - - - - - - - - - - - - - - - - - - - <br /> c = <br /> o = . <br /> O U <br /> ;a 10 w <br /> 10 am 100 <br /> o E <br /> U p = <br /> U 1 <br /> O --4--TDS <br /> i - - <br /> WQO for Sulfate(250 mg/L) EC <br /> - WQO for TDS(450 mg/L) <br /> 1 - 0 10 n - <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan. 2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 <br /> 12 pH 600 Oxidation-Reduction Potential Notes <br /> 500 Well MW-4 was added to the sampling program in December 2010 <br /> 11 Non-detect values are plotted as half of the reporting limit <br /> 400 Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> 10 r 300 Blue shading represents periods of treatment through vertical injection borings <br /> r 0 Red shading represents periods of treatment through the horizontal wells <br /> = g = 200 <br /> _ pg/L= micrograms per liter <br /> -E 100 pS/cm = microSiemens per centimeter <br /> 8 2 0 mg/L = milligrams per liter <br /> WQO=water quality objective (not established if not shown on individual graphs) <br /> 7 a=i -100 <br /> 6o -200 M W H <br /> 5 -300 FORMER MARLEY COOLING TOWER COMPANY <br /> -400STOCKTON,CALIFORNIA <br /> 4 -500 CHEMICAL CONCENTRATIONS OVER TIME IN <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan. 2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 INTERMEDIATE WELL MW-4 <br /> GRAPH 3 <br />