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100,000 Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> �✓ \ ^ Iron <br /> 10,000 1 ��� Mang;fnese — — — WQO for Arsenic(10 Ng/L) <br /> — - - WQOn(300 Ng/L) <br /> Z 1'000 — - - <br /> WQO fornganese(50 Ng/L) 100 <br /> c1,000 100 - - - - - - - - - - - - - - - - - - - - - - - - <br /> °� �- c <br /> c 100 c <br /> U10 ° - - - - - - - - - - - - - - - - - - - ? 10 <br /> Rr- <br /> c <br /> c <br /> Total Chromium V U <br /> 10 c <br /> 1 Hexavalent Chromium O U <br /> - - WQO for Chromium(50 ug/L) U <br /> 0.11 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 /> tM :100 V <br /> Eas N - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> E :Lc c <br /> o <br /> O U <br /> 10 w <br /> 10 tm 100 <br /> c <br /> U E <br /> p <br /> v 1 - y <br /> O 0 TDS <br /> — - ~ 0 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 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 2 0 pS/cm = microSiemens per centimeter <br /> U) A Ah ;° mg/L= milligrams per liter <br /> 7 aci -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> s o -200 M W H <br /> -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-206 <br /> GRAPH 17 <br />