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100,000 - 100,000 1,000 <br /> Total and Hexavalent Chromium Iron and Manganese Arsenic <br /> INIIIIIIIIIINN �19191919i <br /> 10,000 0 Total Chromium e WQO for Arsenic(10 Ng/L) <br /> 10,000 <br /> Hexavalent Chromium _ <br /> = <br /> J ——— WQO for Chromium(50 Ng/L) e .. .......®i <br /> z 1,000 s 100 <br /> 0 n A <br /> 1,000 e <br /> ia <br /> J <br /> 100 -------����+ <br /> L <br /> r ` <br /> 100 <br /> C <br /> V ° _ <br /> L 10 <br /> Iron10 . <br /> v <br /> N <br /> V 1 Manganese o <br /> 1 <br /> o WQO for Iron(300 Ng/L) U <br /> _ <br /> U <br /> WQO for Manganese(50 Ng/L) <br /> 1 rr 1 11 <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 E 1 000 <br /> a� 100 <br /> E a� <br /> £ ---------- -- — •--- ------------- <br /> ®_ <br /> o � <br /> 9' <br /> c <br /> 10 w <br /> 10 c 100 - <br /> c <br /> ®_ <br /> 0 <br /> v v 1 - <br /> ga <br /> O �TDS <br /> EC <br /> WQO a <br /> a <br /> or Sulfate mg ——— WQO for TDS(450 mg/L) <br /> 0 <br /> 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 /> .. <br /> 10 y a .; Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> 300 <br /> p Y <br /> r Blue shading represents periods of treatment through vertical injection borings <br /> g _ 200 a Red shading represents periods of treatment through the horizontal wells <br /> ° 100 pg/L= micrograms per liter <br /> 8 o S/cm - microSiemens per centimeter <br /> p <br /> N 0 a mg/L= milligrams per liter <br /> 100 WQO-water quality objective (not established if not shown on individual graphs) <br /> v - <br /> o -200 ...... r <br /> s © 1`T a -VL <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 TW-14 <br /> GRAPH 50 <br />