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Predicted Time to Reach Water Quality Objective (WQO) in Well MW-33 <br /> Shell Stockton Terminal,3515 Navy Drive,Stockton,California <br /> y = be" ===> x=ln(y/b)/ a <br /> where: y=concentration inµg/L a=decay constant <br /> b=concentration at time(x) x=time(x)in days <br /> Total Petroleum <br /> Hydrocarbons as <br /> Diesel <br /> Constituent (TPHd) <br /> Given <br /> WQO: v 210 <br /> Constant b 2.15E+08 <br /> Constant a -3.73E-04 <br /> Starting date for current trend: 5/30/2006 <br /> Calculate <br /> Attenuation Half Life(years): (-In(2)/a)/36525 5.87 <br /> Estimated Date to Reach WQO: (x=ln(y/b)/a) Maz 2017 <br /> -T undwater-TPHd —Depth to Gro <br /> 10,000 0 <br /> TPH&y=2E+08e'3E41. <br /> F <br /> a 1,000 6 <br /> v <br /> 3 3 <br /> A <br /> yo <br /> S 100 12 U <br /> .2 <br /> U w <br /> v <br /> 10 18 <br /> If tips S°° FIGURE <br /> Date C-65 <br /> Shell Stockton Terminal MW-33: <br /> 3515 Navy Drive TPHd Concentrations and <br /> Stockton,Cahfomta <br /> CONEMTOGA-ROVERS Depth to Groundwater <br /> &ASSOCIATES <br />