Field Filtering Versus Slow Pumping Study


                                      Riverside Plating  Date                                           08-Oct-93
Well Number                                     P-4      Air Temp.
Depth to Water Before                               4.24 Bottom Of Well                                     22.48
Depth to Water After                                     Pump Rate                             600-800 mL/mln
       Time                pH         Conductivity          Temperature          Turbidity      Dissolved Oxygen
       (min)                           (usem)   (usem/10     (degrees C)          (NTU)                (%)
                0                8.82      700       70                16.9                9.9                69
                5                8.75      710       71                16.6                6.7                73
                10               7.92      724       72                16.4                5.3                69
                15               7.39      725       73                16.3                5.8                76
                20               7.86      728       73                15.1                2.9                77
                25               7.90      725       73                15.1                1.8                76
                30               7.88      723       72                15.1                1.1                75
                35               7.86      722       72                15.3                0.8                76
                40               7.85      725       73                15.2                0.7                73
                45               7.83      721       72                15.3                1.5                74
                50               7.83      724       72                14.7                0.7                72
                55               7.82      722       72                14.6                0.6                74
                60                                    0
                65                                    0
                70                                    0
                75                                    0
                80                                    0
                85                                    0
                90                                    0
                95                                    0
            _ 100                                     0
              105                                     0
              110                                     0
              115                                     0
              120                                     0
              125                                     0
              130                                     0
              135                                     0
              140                                     0
              145                                     0
              150                                     0
              155                                     0
              160                                     0
              165                                     0
              170                                     0
              175 0
              180                      ____           0_________________


ceo:rpop4.wql