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100,000 1 <br /> Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> t Iron <br /> 10,000 t Total Chromium <br /> 10,000 Manganese - - WQOfor Arsenic(10Ng/L) <br /> Hexavalent Chromium <br /> — - - WQO for Iron(300 Ng/L) <br /> — — — WQO for Chromium(50 Ng/L) — W QO for Manganese(50 ug/L) 100 <br /> 1,000 <br /> c 1,000 <br /> 0 <br /> 100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> 0 <br /> 0 100 0 <br /> v 10 ° �" ? 10 <br /> Rr <br /> c � <br /> c 10 0 <br /> 1 v V <br /> 0.1 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 -- 1,000 <br /> a� <br /> :T1 00 <br /> Eas N - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> E <br /> c = <br /> O U <br /> ;a 10 w <br /> .......... ":::I <br /> 4) 10 100 <br /> _ E <br /> 0 = <br /> I v 1 <br /> O --4--TDS <br /> i - - <br /> WQO for Sulfate(250 mg/L) EC <br /> WQO for TDS(450 mg/L) <br /> 1 T - 0 10 • <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 The first sample point on the graphs represents baseline conditions before remedial <br /> 11 activities affected groundwater in the vicinity of the well <br /> 400 Non-detect values are plotted as half of the reporting limit <br /> 10 r 300 Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> r 0 Blue shading represents periods of treatment through vertical injection borings <br /> g = 200 Red shading represents periods of treatment through the horizontal wells <br /> ° E 100 pg/L= micrograms per liter <br /> 8 0 0 pS/cm = microSiemens per centimeter <br /> mg/L= milligrams per liter <br /> 7 a=i -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> 6o -200 M W H <br /> -300 FORMER MARLEY COOLING TOWER COMPANY <br /> 5 <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 DEEP WELL MW-361 <br /> GRAPH 37 <br />