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100,000 Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> 10,000t Iron <br /> Total Chromium 10,000 8 Manganese — — — WQO for Arsenic(10 Ng/L) <br /> J Hexavalent Chromium — — — WQO for Iron(300 Ng/L) <br /> Z 1,000 — - - WQO for Chromium(50 Ng/L) — — — WQO for Manganese(50 Ng/L) 100 — <br /> c 1,000 <br /> 100 - J - - - - - - - - - - - - - - <br /> °� �- c <br /> c 100 c <br /> 0 .2— ° - - - - - - - - - - - - - - - - - - - - - - - ? 10 <br /> Rr <br /> c <br /> c � <br /> c 10 0 <br /> 1o U <br /> U <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 10,000.00 Total Organic Carbon 10,000 Total Dissolved Solids and Electrical Conductivity <br /> 1,000.00 <br /> 100 100.00 E 1,000 <br /> J <br /> C 10.00 c <br /> p C <br /> '• O U <br /> l� W <br /> R <br /> 4) 10 � c 1.00 � 100 <br /> c = — — E <br /> U p <br /> U 0.10 0 0 TDS <br /> — - <br /> - <br /> WQO for Sulfate(250 mg/L) F_ EC <br /> - WQO for TDS(450 mg/L) <br /> 1 T - 0.01 + 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 /> 10r 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 Alk 0 0 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 INTERMEDIATE WELL MW-2 <br /> GRAPH 2 <br />