Laserfiche WebLink
Predicted Time to Reach Water Quality Objective (WQO) in Well MW-1 <br /> Shell Stockton Terminal,3515 Navy Drive,Stockton,California <br /> y = b e x ---> 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 3.34E+13 <br /> Constant a -5.92E-04 <br /> Starting date for current trend: 11/18/1997 <br /> Calculate <br /> Attenuation Half Life(years): (-ln(2)/a)/365.25 3.21 <br /> Estimated Date to Reach WQO: (x=ht(y/b)/a) Apr 2019 <br /> tTPHd —Depth to Groundwater <br /> 100,000 p <br /> TPHd:y=3E+13eb� <br /> H <br /> .a 10,000 T, 10 �. <br /> a <br /> a 3 <br /> n ° <br /> b <br /> 1,000 -- - 20 <br /> o $ <br /> u 5 <br /> a <br /> v <br /> Q <br /> 100 30 <br /> 0. O O ey <br /> FIGURE <br /> Date C—^ <br /> Shell Stockton Terminal MW 1: <br /> Stockton,California Navy Drive TPHd Concentrations and <br /> Stockton, <br /> conEsrocRs Depth to Groundwater <br /> & <br /> ASSOCIATES <br />