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Predicted Time to Reach Water Quality Objective (WQO) in Well MW-18 <br /> Shell Stockton Terminal,3515 Navy Drive,Stockton,California <br /> y = be' ___> x=InCv/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: y 210 <br /> Constant b 3.56E+04 <br /> Constant a 9.78E-05 <br /> Starting date for current trend: 8/19/2002 <br /> Calculate <br /> Attenuation Half Life(years): (-in(2)/a)/365.25 19.40 <br /> Estimated Date to Reach WQO: (x=In(y/b)/a) Sep 2043 <br /> --e--TPHd10, —Depth to Groundwater <br /> 000 <br /> 0 <br /> 1,000 <br /> mF $ <br /> i <br /> v <br /> 3 <br /> b � <br /> 100 <br /> 16 U <br /> U <br /> a <br /> TPHd:y=35619e-'r� <br /> 10 <br /> 24 <br /> P1c11RE <br /> Date <br /> C-41 <br /> Shell Stockton Terminal <br /> 3515 Nary Drive MN/_18: <br /> Stockton,Calrtorma TPHd Concentrations and <br /> CO1I�ST MATES ROVERS Depth to Groundwater <br /> $ASSOCI <br />