Field Filtering Versus Slow Pumping Study


Site                                           Demetral Date                                           04/19/90
Well Number                                     MW1B    Air Temp.                                          67 F
Depth to Water Before                              7.39 Bottom Of Well                                      107
Depth to Water After                                    Pump Rate                                   150 mL/mln
       Time               pH         Conductivity          Temperature          Turbidity      Dissolved Oxygen
       (min) --(usem)                          (usem/10     (degrees C)          (NTU)               (%)
                0               7.00      340       34                14.4             200.0                 19
                5               7.28      428       43                13.5             200.0                 4
                10              7.36      439       44                13.2             178.0                 2
                15              7.38      444       44                13.1             131.9                  1
                20              7.39      443       44                13.5              93.1                  1
                25              7.39      443       44                14.0             119.5                 2
                30              7.38      444       44               13.7               81.8                 3
                35              7.38      443       44               13.6               68.2                 2
                40                        442       44                13.4              58.5                 2
                45              7.62      442       44                13.4              47.5                 1
                50              7.47      442       44               13.4               43.0                 2
                55              7.43      443       44               13.4               37.5                 2
                60              7.41      443       44               13.4               34.9                 2
                65              7.41      442       44               13.4               32.3                 2
                70              7.39      442       44               13.5               30.3                 2
                75              7.37      441       44               13.8               28.8                 2
                80              7.36      440       44               13.8               25.2                 2
                85              7.36      430       43               13.9               24.4                 1
                90              7.36      430       43               13.7               25.3                 1
                95              7.35      436       44               14.2               22.9                 2
              100               7.35      435       44               14.3               19.9                 2
              105               7.35      434       43               14.2               19.0                 2
              110               7.35      434       43               14.1               18.4                 2
              115                         433       43               13.9               17.9                 2
              120               7.46      431       43               13.8               17.4                 2
              125               7.44      431       43               13.7               16.6                 2
              130               7.40      431       43               13.7               15.4                 2
              135               7.40      431       43               13.6               13.7                 2
              140               7.38      431       43               13.6               12.3                 2
              145               7.36      430       43               13.5               10.7                 2
              150               7.36      431       43               13.3                9.5                 2
              155               7.35      432       43               13.2                8.4                 2
              160               7.35      433       43               13.0                7.2                 2
              165               7.35      434       43               13.0                6.4                 2
              170                         434       43               13.0                5.7                 2
              175               7.42      435       44               12.9                4.9                 2
              180  _____________                     0                                        _______


ceo:da2Olb.wql