Peakhour enabler code#

For atmospheric tanks that use a portion of their volume to generate distribution system pressure, the minimum storage elevation is that elevation of water in the tank that can provide a minimum pressure of 20 psig throughout that tank's service area under distribution system-wide maximum daily water demand.ĭ. Effective storage of atmospheric storage tanks shall be the volume available to store finished water in atmospheric reservoirs or tanks, measured as the difference between the overflow elevation, or the normal maximum operating level, and the minimum storage elevation. There is no minimum finished water effective storage requirement for noncommunity waterworks.Ĭ. In the absence of a hydraulic model, effective storage shall be a minimum of one-half of estimated maximum daily water demand of the waterworks at the design year.ī.

Compliance with this requirement is normally determined by the use of a hydraulic model. Community waterworks shall provide sufficient finished water effective storage to enable the waterworks to meet the estimated maximum daily water demand at the design year.

Either pump capacity or storage capacity or both may be utilized to meet the peak hour demand.Ī. Noncommunity waterworks shall be designed to meet or exceed the peak hour demand of the proposed services. The design shall account for diurnal demand patterns and special demands placed on the waterworks such as firefighting, industrial use, and wholesale customers.Ģ. Community waterworks shall be designed to meet or exceed the estimated maximum daily water demand of the service area at the design year. USBC and design standards may be referenced for noncommunity waterworks, as appropriate.ġ. Historical data or typical usage figures of waterworks with similar service area characteristics and appropriate peaking factors shall be used to support the design. Waterworks design shall be based on sound engineering practice substantiated in the engineer's design and approved by the department. Expansion by modular steps should be considered.ī. All waterworks shall be designed so that they can readily be increased in capacity except where circumstances preclude the probability of expansion. Community waterworks shall be designed to provide for the estimated water demand for 10 to 30 years hence under predicted growth conditions.

Peakhour enabler code#

Waterworks shall conform to the Public Water Supply Law, Article 2 of Chapter 6 of Title 32.1 of the Code of Virginia.