Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 930 - SURFACE SOURCE WATER TREATMENT CODE
Section 930.40 - Treatment Plant Maintenance
Universal Citation: 77 IL Admin Code ยง 930.40
Current through Register Vol. 48, No. 12, March 22, 2024
a) Slow sand filtration treatment plants shall be maintained as follows:
1) Cleaning. Whenever the design flow can no
longer be achieved the filter must be cleaned. In order to clean the filter,
the water level must be lowered to 2 to 3 inches below the top of the sand. The
filter must not be drained. The accumulated mud and slime along with 1/2 inch
of the top of the sand surface must be removed.
2) Proper Filter Depth. After 6 inches of
sand has been removed due to repeated cleaning, additional sand which shall
comply with the design criteria specified in Section
930.20(c)
must be added so the filter is restored to the original depth of 3
feet.
b) Cartridge filtration treatment plants shall be maintained as follows:
1) Cartridge filters shall be cleaned or
replaced according to the manufacturer's recommendation.
2) Replacement cartridges shall be equal to
the original equipment.
c) Ultraviolet disinfection equipment shall be maintained as follows:
1) The ultraviolet
equipment lamp shall be cleaned or replaced when the equipment has a lamp
intensity failure. The lamp shall be replaced when the equipment has a lamp
failure.
2) The ultraviolet lamp
shall be replaced at intervals specified by the manufacturer, but no less often
than annually.
3) Replacement
ultraviolet equipment lamps shall be equal to the original equipment.
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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