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100,000100,000 1,000 <br /> mm Total and Hexavalent Chromium Iron and Manganese Arsenic <br /> 11119III�I <br /> 10,000 0 Total Chromium <br /> 10,000 s —— WQO for Arsenic(10 Ng/L) <br /> d; <br /> f Hexavalent Chromium s 191@III9I <br /> = 1 Ooo WQO for Chromium(50 Ng/L) 100 - <br /> s00404040404000 <br /> a <br /> 0 1,1)00 - <br /> J <br /> 100 --- - — — J —----- - <br /> ss <br /> ----- ---- <br /> z <br /> ------------- <br /> m s 100 e o <br /> °------- -- ee -----------V 10 ------- <br /> 10 <br /> ® <br /> _ <br /> 'NOW 14W 14W 14W <br /> L .........: <br /> -N40 C Iron v <br /> N <br /> v 10 Manganese ° HE <br /> 1 0 --- WQO for Iron(300 Ng/L) U <br /> ——— WQO for Manganese(50 Ng/L) <br /> i <br /> 0.1 1 ia: ;, ,,,, rT 1 101&191919191E <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 10 000 10 000 <br /> Sulfate Total Organic Carbon Total Dissolved Solids and Electrical Conductivity <br /> ------ 1,000 <br /> .. <br /> ilR1R1R <br /> 100 E 1,000 <br /> J <br /> rn 100 <br /> E ai CO) <br /> wW <br /> 10 NII �IIJ <br /> L <br /> 10 c 100 <br /> c <br /> ° c <br /> v <br /> v 1 = <br /> O ®_ TDS <br /> —0 EC <br /> WQO for Sulfate(250 mg/L) ——— WQO for TDS(450 mg/L) <br /> 1 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 soo Oxidation-Reduction Potential Notes <br /> The first sample point on the graphs represents baseline conditions before remedial <br /> 11 __ 500 activities affected groundwater in the vicinity of the well <br /> 400 Non-detect values are plotted as half of the reporting limit <br /> 10 yMetals samples were filtered before analysis; concentrations are on a dissolved basis <br /> �. 300 - <br /> w o a Blue shading represents periods of treatment through vertical injection borings <br /> E 9 > 200 a <br /> _ Red shading represents periods of treatment through the horizontal wells <br /> 100 = pg/L= micrograms per liter <br /> 8 0 0 pS/cm = microSiemens per centimeter <br /> mg/L= milligrams per liter <br /> 7 c <br /> a� -100 a WQO=water quality objective (not established if not shown on individual graphs) <br /> v <br /> 6 <br /> o -200 a <br /> -300 <br /> 5 FORMER MARLEY COOLING TOWER COMPANY <br /> -400 <br /> STOCKTON,CALIFORNIA <br /> 4 -500 CHEMICAL CONCENTRATIONS OVER TIME IN 100- <br /> Jan. 2008 Jan. 2009 Jan. 2010 Jan. 2011 Jan. 2012 Jan. 2008 Jan. 2009 Jan. 2010 Jan. 2011 Jan. 2012 FOOT SAND WELL TW-16 <br /> GRAPH 52 <br />