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Predicted Time to Reach Water Quality Objective (WQO) in Well MW-15 <br /> Shell Stockton Terminal,3515 Navy Drive,Stockton,California <br /> y = b e" ===> 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 /> Methyl Tertiary Tertiary Butyl <br /> Butyl Ether Alcohol <br /> Constituent (MTBE) (TBA) <br /> Given <br /> WQO: p 1,800 18,000 <br /> Constant b NA NA <br /> Constant a NA NA <br /> Starting date for current trend: NA NA <br /> Calculate <br /> Attenuation Half Life(years): (-In(2)/a)/365.25 NA NA <br /> Estimated Date to Reach WQO: (x=ln(y/b)/ a) Below WQO Below WQO <br /> t-MTBE --w-TBA —Depth to Groundwater <br /> 1,000 0 <br /> TBA:y=1.61E+14e-7"ffi-0'x <br /> ISI <br /> O <br /> H <br /> a 100 7 <br /> A <br /> o � b <br /> b Y go <br /> 10 14 O <br /> 0 8 <br /> O MTBE:y=9.97E+02e-'.�_ FS <br /> a <br /> a <br /> Q <br /> 1 21 <br /> FIGURE <br /> Date <br /> C-37 <br /> Shell Stockton Terminal <br /> 3515 Navy Drive MW-15; <br /> Stockton,California MTBE and TBA Concentrations <br /> T'OC�1;eMERS and Depth to Groundwater <br />