12 Va. Admin. Code § 5-590-510 - Acceptable operating practices
A. This section is not intended to be all
inclusive but reflects the concern for the public health significance of
certain practices related to waterworks operation.
B. Filter operation.
1. Gravity flow granular media filters
designed for pathogen and turbidity removal shall not be operated without
adequate chemical coagulation as determined by the department.
2. A waterworks utilizing gravity flow
granular media filtration shall not vary the rate of filtration through any
single filter above its design capacity unless approved by the
department.
3. Gravity flow
granular media filters equipped with filter-to-waste facilities shall not be
returned to service after backwashing until a thorough rinsing period has
occurred so that the filter-to-waste water has a turbidity less than or equal
to 0.3 NTU.
4. All MF and UF
technologies employed for pathogen removal shall demonstrate removal efficiency
equal to the removal (log inactivation) credit given in Table 500.1. A direct
integrity test acceptable to the department shall be conducted and include the
following:
a. The direct integrity test
capability shall be provided for each filter unit; and
b. The direct integrity test shall be
conducted at least daily for each day the filtration unit is in
operation.
C.
All waterworks shall provide a minimum working pressure of 20 psigauge (psig)
at all service connections.
D. The
board recommends that all community waterworks in the Commonwealth deliver the
optimum fluoride ion concentration as determined by the U.S. Department of
Health and Human Services.
E. A
waterworks owner shall provide the commissioner at least 90 days prior written
notice of the intent to initiate or discontinue a program to provide the
optimum fluoride ion concentration.
Notes
Statutory Authority: §§ 32.1-12 and 32.1-170 of the Code of Virginia.
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.