Table 4. Well Chlorination Experimental Results
Sample Sample          As     Fe      Cl   CaCO3    Ca      Na     K      Mg    S04    TDS    Redox Field pH   Diss. Ox. SpecCond.
Date    Time          (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mV)       (SU)     (mgIL)  (umhoslcm)
5/30/00 back-ground  62 (1)  0.97    1.8    276      31     39     2.4    24    <4.5    270    -109    7.9       0.1        520
6/16/00 pre-test       53
6/17/00 time = 0 (2)   51    0.23    9.5    276      35     38     2.3    26    <4.5    288    176     7.7       0.1        540
6/19/00 2 days         5.2   0.06    77.5   253      59     45     2.3    29    <4.5    410    175     7.3       0.5        720
6/22/00 5 days         40                                                                     -120     7.6       0.5        340
6/27/00 10 days        37     2.0                    37     38     2.1    25                   -290    7.8       0.7        530
7/6/00  19 days        51     2.3    2.7    275     32      38     2.2    25    <4.5    266    -138    7.8       1.0        530
notes:
(1) Samples for arsenic analysis were unfiltered with the exception of that collected on 5/30/00, which was field filtered to 0.45 microns.
(2) Sample at time = 0 was collected immediately following purging about 3 well volumes from the well, about 24 hours after addition of chlorine pellets

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