f. Chemical Treatment
(1) Chemical Pumps and Tanks (Figure 1- 15). There are three chemical injection pumps; one for polyelectrolyte (1),
one for sequestrant (2), and one for hypochlorite (3). Each pump can be adjusted to control its delivery or to turn it off.
Each of the three chemicals is contained in a tank. Each tank is labeled by name and corresponding identifying symbol:
Polyelectrolyte triangle (4)
Sequestrant square (5)
Hypochlorite circle (6)
The tanks are manually filled with potable water from the utility hose. The polyelectrolyte and sequestrant are each
supplied in a one gallon container with graduated dispensing neck to allow proper addition to the chemical tanks.
Hypochlorite is added by emptying premeasured packages of dry chemical and adding water.
Figure 1-15. Chemical Treatment Components