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					                                                                                     SWLOAD5B




METHOD FOR ESTIMATNG FLOW, AVERAGE CONCENTRATION AND MASS LOADING TO SURFACE WATER FROM GROUNDWATER
Project:     SWLOAD5B
Date:               2/5/2002                                                                           PA DEPARTMENT
Contaminant: Benzene                           Prepared by:           BLRWM                     OF ENVIRONMENTAL PROTECTION
  SOURCE                                                                                                SWLOAD5B.XLS
   CONC            Ax          Ay        Az    LAMBDA SOURCE SOURCE                               A METHOD FOR ESTIMATING
  (units)          (ft)        (ft)      (ft)               WIDTH THICKNESS Time               COMTAMINANT LOADING TO SURFACE
                                                                                                            WATER
    mg/l         >.0001      >.0001   >=.0001    day-1       (ft)        (ft)     (days)
                                                                                                            based on
         15               20        1 1.00E-04    0.0008          100         10 1.00E+99             P.A. Domenico (1987)
                                                                                                                                         Modified to Include Retardation
 Hydraulic      Hydraulic                   Soil Bulk                Frac.      Retard-        V
   Cond         Gradient        Porosity     Density      KOC      Org. Carb.    ation   (=K*i/n*R)
                                                   3)
  (ft/day)        (ft/ft)      (dec. frac.) (g/cm                                   (R)    (ft/day)
   2.83E+00               0.01       0.358        1.7         58    1.00E-03    1.275419 0.0619799

                                                           -93.875     -75.1      -56.325       -37.55      -18.775           0      18.775       37.55    56.325        75.1     93.875
Edge Criterion (mg/l)              0.005           0     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
Higest modeled conc.            5.17281      -1.0438     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
                                             -2.0876     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
SURFACE WATER LOADING GRID                   -3.1314     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
Distance to Stream (ft)     100              -4.1752     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
Plume View Width (ft)    187.75               -5.219     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
Plume View Depth (ft)    10.438              -6.2628     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
                                             -7.3066     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
                                             -8.3504     0.004966 0.196452      1.694005    4.1951237    5.1044122    5.1728133   5.1044122   4.1951237 1.694005     0.196452   0.004966
PENTOX NEEDED                                -9.3942     0.004966 0.1964502     1.693989    4.1950852    5.1043653    5.1727658   5.1043653   4.1950852 1.6939895     0.19645   0.004966
                                             -10.438     4.85E-06 0.0001919     0.001655    0.0040988    0.0049872     0.005054   0.0049872   0.0040988 0.0016551    0.000192   4.85E-06


                                                        Average Groundwater Concentration                2.35601 mg/l

                                                        Plume Flow                                       0.00062 cfs               0.0004 MGD

                                                        Mass Loading to Stream                            3552.43 mg/day




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