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100,000 Ikili Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> Ii9iBi9iBi <br /> Iron <br /> 10,000 0 Total Chromium <br /> 10,000 Manganese —— WQO for Arsenic(10 Ng/L) <br /> Hexavalent Chromium ——— WQO for Iron(300 Ng/L) <br /> J — WQO for Chromium(50 Ng/L) I WQO for Manganese(50 ug/L) 100 <br /> z 1,000 <br /> c 1,000 <br /> ° I�III�IN� a <br /> e <br /> 100 I, s <br /> ----.' -- �— --- — m s 1 <br /> Z s <br /> 100s o <br /> M4 rK <br /> V10 ° — ——————— ----- --------_-- L 10 <br /> ®_ <br /> a ......... 'E <br /> 10 c <br /> d <br /> 1 <br /> o v <br /> U , <br /> ...._.... Igillwi <br /> 0.1 1 1 IE: <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 .............................. 0,000 <br /> ............... <br /> Total Organic Carbon Total Dissolved Solids and Electrical Conductivity <br /> ------------------------------ <br /> 1,000 <br /> a <br /> 100 1,000 - <br /> J I= <br /> E <br /> rn a 100 <br /> C1 in --- ---- -- — — -- <br /> C <br /> 1 <br /> 0 .. <br /> ®_ IIII <br /> O U <br /> 10 w <br /> 10 1 100 _...... _ <br /> C w J <br /> C <br /> O V E <br /> d <br /> UO C <br /> _ <br /> U 1 <br /> O TDS <br /> ——— WQO for Sulfate(250 mg/L) €€ <br /> EC <br /> a <br /> --- WQO for TDS(450 mg/L) <br /> 0 <br /> 10 ®� <br /> Jan. 2008 Jan. 2009 an. 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 /> 10 y a Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> .r 300 _...:.:.: <br /> p Y <br /> r o a Blue shading represents periods of treatment through vertical injection borings <br /> _ 200 Red shading represents periods of treatment through the horizontal wells <br /> 9 = 9 p p 9 <br /> ° 100 pg/L= micrograms per liter <br /> kn <br /> 8 2 S/cm - microSiemens per centimeter <br /> p .... p - <br /> N E mg/L= milligrams per liter <br /> 7 100 WQO=water quality objective (not established if not shown on individual graphs) <br /> v <br /> % <br /> 6 v -200 <br /> 04 <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-207 <br /> GRAPH 18 <br />