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Regression of Plume Centerline Concentrations' <br /> Project: 7500 W 11th Street Tracy User Name: Dai Watkins <br /> } Location: San Joaquin County State: California . <br /> Groundwater Flow.Direction: 17 degrees Distance to Receptor- 250 feet <br /> + From Period: 10127/2004 to 3/31/2006 <br /> Selected Plume Well Distance to Receptor(feet) <br /> Centerline Wells: <br /> MW-19 250.0 <br /> MW-11 443.8 <br /> s MW-18 R 583.3 <br /> MW-16 740.8 <br /> MW-14 877.2 <br /> MW-7 972.5.- <br /> MW-3 <br /> 72.5.- <br /> MW-3 1134.5 <br /> fThe distance is measured in the Groundwater Flow Angle <br /> ! from the well to the compliance boundary. <br /> i LLL.. <br /> #.� Sample Event Effective Date Number of Regression Confidence in <br /> Centerline Wells Coefficient liftCoefficient <br /> BENZENE <br /> = — <br /> Sample Event 1 5/11/2000 2 0"OOE+00 0.0% <br /> Sample Event 2 11/2812000. 2 0.00E+00 0.0% <br /> Sample Event 3 5/30/2001 2 0.00E+00 0.0% <br /> Sample Event 4 9/1112001 2 0.00E?00 0.0% <br /> Sample Event 5 12/13/2001 2 0.00E+00 0.0% <br /> Sample Event 6 4/11/2002 3 -1.24E-02 74.4% <br /> d <br /> Sample Event 7 7/29/2002 3 -1.41E-02 78.9% <br /> Sample Event 8 1012512002. 2 0:00E+00 0,0% <br /> Sampte Event 9 1120/2003 3 -1-34E-02 76.9% <br /> Sample Event 10 4115/2003 3 -1-29E-02 75.8% <br /> Sample Event 11 7/30/2003 3 -1.41E-02 78.9% <br /> Sample Event 12 10/27/2003 3 -1.21E-02 73.6% <br /> Sample Event 13 1126/2004 3 -0.85E-03 84.3% <br /> f Sample Event 14 _ 4121/2004 7 -7"92E-03 97.2% <br /> f Sample Event 15 7/26/2004 6 -0-25E-03 94.4% <br /> r <br /> Sample Event 16 1012712004. 7 -9.18E-03. 97.3% <br /> Sample Event 17 3/7/2605 7 8.68E-03 97.4% <br /> Sampte Event 18 6/27/2005 6 1"09E-02 98.7% <br /> * Sample Event 19 10/20/2005 5 -8.08E-03 96.3% <br /> Sample Event 20 12/20/2005 5 -9.65E-03 99.2% <br /> MAROS Version 24,2004,AFCEF Tuesday,May 23,2006 Page 1 of 3 <br /> f <br />