Shock treatment is also
recommended if your
groundwater supply (a
dug or
drilled well) has been
polluted by
bacterial contaminants.
Contamination can
result from the
construction process,
faulty construction, or as a result of a
maintenance procedure. Shock treatment is also
somewhat effective against
iron bacteria or
sulphate-reducing bacteria.
In general, shock treatment means producing a cholrine concentration of more than 300 ppm (Parts per million).
The general procedure for shock treatment is as follows:
From
personal experience, you should not
skimp on any step. If you do it wrong, your system will not be cleaned, and you will be
painfully forced to
repeat the
process. After 10 days, get a good
bacteriological analysis to see if you were
successful. Repeat several days later
just to be sure.