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Virginia Administrative Code (Last Updated: January 10, 2017) |
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Title 12. Health |
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Agency 5. Department of Health |
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Chapter 590. Waterworks Regulations |
Section 630. Backflow prevention devices
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A. Any backflow prevention device shall be of the approved type and shall comply with the Uniform Statewide Building Code.
B. Any backflow prevention device shall be installed in a manner approved by the water purveyor and in accordance with the Uniform Statewide Building Code.
C. Existing backflow prevention devices approved by the purveyor and the division prior to the effective date of this chapter shall, except for inspection, testing, and maintenance requirements, be excluded from the requirements of 12VAC5-590-600 A and B if the water purveyor and the division are assured that the devices will protect the waterworks.
TABLE 2.10. DETERMINATION OF DEGREE OF HAZARD
Premises with one or more of the following conditions shall be rated at the corresponding degree of hazard.
High Hazard
The contaminant would be toxic, poisonous, noxious or unhealthy.
A health hazard would exist.
A high probability exists of a backflow occurrence either by back pressure or by back siphonage.
The contaminant would disrupt the service of piped water for human consumption.
Examples - sewage, used water, nonpotable water, auxiliary water systems, toxic or hazardous chemicals, etc.
Moderate Hazard
The contaminant would only degrade the quality of the water aesthetically or impair the usefulness of the water.
A health hazard would not exist.
A moderate probability exists of a backflow occurrence either by back pressure or by back siphonage.
The contaminant would not seriously disrupt service of piped water for human consumption.
Examples - food stuff, nontoxic chemicals, nonhazardous chemicals, etc.
Low Hazard
The contaminant would only degrade the quality of the water aesthetically.
A health hazard would not exist.
A low probability exists of the occurrence of backflow primarily by back siphonage.
The contaminant would not disrupt service of piped water.
Examples - food stuff, nontoxic chemicals, nonhazardous, chemicals, etc.
Historical Notes
Derived from VR355-18-006.06 § 2.30, eff. August 1, 1991; amended, Volume 09, Issue 17, eff. June 23, 1993; Volume 31, Issue 01, eff. October 10, 2014.