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100,000 - Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 -- Arsenic <br /> ililaliial <br /> 10,000 t Iron <br /> f Total Chromium 10 000 ——— WQO for Arsenic(10 Ng/L) <br /> ............ Manganese <br /> Hexavalent Chromium ___ WQO for Iron(300 Ng/L) <br /> J ___ WQO for Chromium(50 Ng/L) ___ WQO for Manganese(50 Ng/L) 1 pp <br /> Z 1,000 <br /> a <br /> c <br /> 1,000 s <br /> 100 --- ------- ----- — <br /> L -_ <br /> a Z <br /> ___———— __________________________1 <br /> Z a <br /> 100 - o <br /> V s <br /> 0 10 ° — -------- ----------- L 10 <br /> L - y <br /> e <br /> s <br /> 10 a <br /> 1 OU° <br /> o <br /> 1111110111114 110 <br /> 0.1 <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 /> 100 <br /> 1,000 <br /> J ` <br /> rn 3100 <br /> Eai cn <br /> c <br /> £ a <br /> O <br /> O U <br /> 10 w 1 <br /> 10 100 <br /> 0 <br /> U ® ° c <br /> _ <br /> U 1 <br /> O — TDS <br /> ~ f = <br /> — <br /> — <br /> WQO for Sulfate(250 mg/L) EC, a <br /> WQO for TDS(450 mg/L) <br /> 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 /> 12pH 600 Oxidation-Reduction Potential Notes <br /> 50011 " 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 yMetals samplesY were filtered before analysis; concentrations are on a dissolved basis <br /> 300 <br /> w Blue shading represents periods of treatment through vertical injection borings <br /> g = 200 v Red shading represents periods of treatment through the horizontal wells <br /> E 100 = pg/L= micrograms per liter <br /> If <br /> 8 p pS/cm - microSiemens per centimetero <br /> N E mg/L= milligrams per liter <br /> -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> o 6 <br /> -200 © 7;i`-4 <br /> -300 <br /> 5 FORMER MARLEY COOLING TOWER COMPANY <br /> -400 STOCKTON,CALIFORNIA <br /> IN: CHEMICAL CONCENTRATIONS OVER TIME IN <br /> 4 -500 <br /> Jan. 2008 Jan. 2009 Jan. 2010 Jan. 2011 Jan. 2012 Jan. 2008 Jan. 2009 Jan. 2010 Jan. 2011 Jan. 2012 SHALLOW WELL MW-201 <br /> GRAPH 13 <br />