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Predicted Time to Reach Water Quality Objective (WQO) in Well MW-19 <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: y 210 <br /> Constant b NA <br /> Constant a NA <br /> Starting date for current trend: NA <br /> Calculate - <br /> Attenuation Half Life(years): (-In(2)/a)/365.25 NA <br /> Estimated Date to Reach WQO: (x=hr(y/b)/ a) Below WQO <br /> t TPHd —Depth to Groundwater _ <br /> 100,000 0 <br /> lj <br /> 10,000 8 O <br /> 3 f6 <br /> 1,000 16 <br /> m <br /> 0 <br /> v � <br /> c $ <br /> Uo 100 24 �S <br /> a <br /> Ca <br /> 10 32 <br /> Nip 1`°r 1 ��p '\� 1� FIGURE <br /> Date C-44 <br /> Shell Stockton Terminal ,. �„ MW-19: <br /> 3515 Navy Drive �.17i'-.� TPHd Concentrations and <br /> Stockton,California co NS) <br /> Depth to Groundwater <br /> &ASSOCIATES <br />