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Table 15 <br /> Dual Phase Extraction System -Semi-Annual Metals and TTO Treated Groundwater Data <br /> Parcel 2A- L&M OU <br /> 666 West Weber Avenue, Stockton, CA <br /> Date Cadmium Total Chromium Copper Nickel Zinc TTO by 624 TTO by 625 <br /> Sampled Sample ID Notes (mg/L) (mg/L) (mg/L) Lead (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) <br /> 1/13/2005 GW-INF <0.005 <0.005 <0.005 <0.005 <0.005 0.0107 ND ND <br /> 3/29/2005 EFF <0.01 <0.01 <0.01 <0.005 <0.02 0.1800 ND ND <br /> 3/15/2006 EFF <0.005 <0.005 <0.005 <0.005 0.0191 0.1050 ND ND <br /> 5/31/2007 GW-EFF <0.005 <0.005 <0.005 <0.005 <0.005 0.0491 ND ND <br /> 5/12/2008 GW-EFF <0.001 <0.005 <0.005 <0.005 <0.005 <0.010 ND ND <br /> 1/14/2009 GW-EFF <0.001 0.0023 0.0016 <0.001 0.00517 0.0143 ND ND <br /> 7/9/2009 GW-EFF <0.001 <0.001 <0.001 <0.001 0.00285 0.00907 ND ND <br /> 1/12/2010 GW-EFF <0.001 <0.001 <0.001 <0.001 0.00257 0.01040 ND ND <br /> 6/10/2010 GW-EFF <0.001 <0.001 <0.001 <0.001 0.00531 0.0830 ND ND <br /> 7/12/2010 GW-EFF <0.001 0.0013 0.0180 <0.001 0.00231 0.0181 -- -- <br /> Discharge Limits: 2.0 5.0 6.0 2.0 5.0 7.0 0.5 Benzene/4.57 Total <br /> Definitions: <br /> mg/L = Milligrams per liter <br /> < =Value is less than laboratory reporting limit <br /> ND = No analyte detected above laboratory reporting limits <br /> TTO =Total toxic organics <br /> -- = Not sampled/applicable <br /> \\Us1345-f01\secor\projects-077\Tidewater\TW Stockton (Parcel 2A-0415)\Engineering\O&M\Tables\O&M Tables 2010\4Q10\Parcel 2A OM Tables 4Q10.xlsx Page 1 of 1 <br />