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100,000 Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> 10,000 <br /> 10,000 — — — WQO for Arsenic(10 Ng/L) <br /> Total Chromium <br /> J Hexavalent Chromium <br /> Z 1,000 - - - WQO for Chromium(50 Ng/L) 100 - <br /> o A 1,000 <br /> 100 <br /> R - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> 100 <br /> G <br /> v - - -10 ? <br /> 10 <br /> r <br /> _ Iron y <br /> v 10 Manganese c <br /> 1 0 — - - WQO for Iron(300 Ng/L) U <br /> U — — — WQO for Manganese(50 Ng/L) <br /> 0.1 1 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 I <br /> r <br /> J 100 1,000 <br /> tM :100 <br /> Eas N - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> c <br /> E <br /> o � <br /> O U <br /> 10 w <br /> 10 100 <br /> 0 <br /> U E <br /> 0 c <br /> U 1 y <br /> 0 0 TDS <br /> — - <br /> - <br /> WQO for Sulfate(250 mg/L) F_ 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 soo 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 /> 104 300 Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> w 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 /> 100 pg/L= micrograms per liter <br /> 8 0 0 A pS/cm = microSiemens per centimeter <br /> mg/L= milligrams per liter <br /> d -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> s 0 -200 M W H <br /> M -300 <br /> 5 FORMER MARLEY COOLING TOWER COMPANY <br /> -400 STOCKTON,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 SHALLOW WELL MW-6 <br /> GRAPH 4 <br />