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100,000Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> L <br /> 10,000 t Total Chromium 1 000 — — — WQO for Arsenic(10 Ng/L) <br /> 0 Hexavalent Chromium <br /> J — — — WQO for Chromium(50 Ng/L) <br /> z 1,000 01111100 - <br /> c 1,000 <br /> 100 - — - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> c <br /> c 100 2 <br /> v10 ° - - — — — - - - - - - - — — - - - - - - - - - - - - - - ? 1017\ - - <br /> c <br /> C Iron d <br /> U <br /> 1 c 10 ---0 Manganese 0 <br /> 0 — - - WQO for Iron(300 pg/L) U <br /> - - 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 <br /> 100 AIL 1,000 <br /> a� :100 <br /> E as N <br /> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> U:LE <br /> o O10 wc <br /> 4) 10 100 <br /> E <br /> ION- <br /> U 0 c <br /> U 1 — to <br /> O 0 TDS <br /> — - ~ EC <br /> - <br /> WQO for Sulfate(250 mg/L) <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 /> 104 300 Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> w 0Blue 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 00 pS/cm = microSiemens per centimeter <br /> mg/L= milligrams per liter <br /> aci -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> 6 -200 M W H <br /> -300 FORMER MARLEY COOLING TOWER COMPANY <br /> 5 <br /> -400 STOCKTON,CALIFORNIA <br /> 4 -500CHEMICAL 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-303 <br /> GRAPH 28 <br />