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100,000 Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> f Iron <br /> 10,000 <br /> u 10,000 = Manganese �_ WQO <br /> for Arsenic(10 Ng/L) <br /> f Total Chromium -- WQO for Iron(300 Ng/L) <br /> J Hexavalent Chromium —— WQO for Manganese(50 Ng/L) <br /> --- WQOforChromium(50ug/L) <br /> 100 <br /> z 1,000 - <br /> a <br /> 0 <br /> 1,000 a <br /> _ a ^ <br /> a <br /> 100 — ® ---- ---- --� t <br /> r 1 <br /> ————————————————— ————————————————— S e.: a .......:E <br /> `r <br /> = 100 _ o <br /> 0 .o -------- _ -----------10 . 10 <br /> ®_ <br /> a = <br /> = s <br /> V 10 s = <br /> o <br /> O _ <br /> - <br /> U <br /> ® lill�ldl�l <br /> 1 1 ICll <br /> 0.1 lCl@ICIiIE <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 1000 �� J� <br /> E <br /> -- <br /> rn <br /> :r100 <br /> EE ---------------------- <br /> c <br /> R <br /> c <br /> 10 w <br /> 10 _ . <br /> c 100 <br /> c <br /> o ° E <br /> U <br /> c <br /> v 1 _ ..0 <br /> VIE! <br /> a <br /> € TDS a <br /> 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 /> 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 <br /> Non-detect values are plotted as half of the reporting limit <br /> 10 y _ Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> .r 300 __.. <br /> p Y <br /> r75 <br /> Blue shading represents periods of treatment through vertical injection borings <br /> = 9 _ 200 u <br /> _ Red shading represents periods of treatment through the horizontal wells <br /> ° 100 pg/L= micrograms per liter <br /> 8 o a pS/cm = microSiemens per centimeter <br /> 0 ' <br /> N E mg/L= milligrams per liter <br /> 7 , -100a WQO=water quality objective (not established if not shown on individual graphs) <br /> v <br /> 6 - v -200 ;ru; <br /> a © 1T.�1 V LH <br /> -300 <br /> FORMER MARLEY COOLING TOWER COMPANY <br /> 5 - <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-9 <br /> GRAPH 7 <br />