No. 29036 (Amendment): R309-105-9. Minimum Water Pressure

DAR File No.: 29036
Filed: 09/15/2006, 04:53
Received by: NL

RULE ANALYSIS

Purpose of the rule or reason for the change:

The reason for the change is to describe additional minimum pressure under conditions of flow for existing Public Water Systems when they expand their system into new service areas or supply new subdivisions after January 1, 2007; and to make the rule more in accordance with typical design standards, as well as standards of other agencies such as the American Water Works Association (AWWA), the American Society of Civil Engineers (ASCE), and other nearby states.

Summary of the rule or change:

The changes: 1) clarify that the minimum water pressure of 20 psi is during conditions of fire flow added to peak day demand; 2) add a condition of minimum water pressure of 30 psi during peak instantaneous demand; and 3) add a minimum water pressure of 40 psi during peak day demand for existing Public Water Systems extending services into new areas or supplying new subdivisions after January 1, 2007.

State statutory or constitutional authorization for this rule:

Section 19-4-104

Anticipated cost or savings to:

the state budget:

None--Since this amendment only clarifies this portion of rule and the additional water pressure requirements for existing Public Water Systems, it will not require additional personnel or other funds from the state budget.

local governments:

Little to None--Most, if not all, well functioning Public Water Systems operated by local government currently meet or exceed the current minimum water pressure requirements, as well as the proposed additional minimums. The design of existing Public Water Systems will only require initial planning concerning storage location and distribution pipeline sizing which should not add significant cost or time.

other persons:

Little to None--Most engineering companies currently look to typical textbook design standards, as well as standards of other agencies such as AWWA, ASCE, and other nearby states when designing Public Water Systems so there should not be any additional cost or time involved.

Compliance costs for affected persons:

Existing Public Water Systems extending service after January 1, 2007, should not see any costs over and above than if their system were designed with the typical capacity for anticipated growth and expansion. Some increased cost may be expected if storage and location for adequate pressure requires additional length of transmission line.

Comments by the department head on the fiscal impact the rule may have on businesses:

The department agrees that the proposed changes to this rule will have little to no detrimental impact on existing water systems nor on new public water systems. Dianne R. Nielson, Executive Director

The full text of this rule may be inspected, during regular business hours, at the Division of Administrative Rules, or at:

Environmental Quality
Drinking Water
150 N 1950 W
SALT LAKE CITY UT 84116-3085

Direct questions regarding this rule to:

Bill Birkes at the above address, by phone at 801-536-4201, by FAX at 801-536-4211, or by Internet E-mail at [e-mail]

Interested persons may present their views on this rule by submitting written comments to the address above no later than 5:00 p.m. on:

10/31/2006

This rule may become effective on:

01/01/2007

Authorized by:

Kevin Brown, Director

RULE TEXT

R309. Environmental Quality, Drinking Water.

R309-105. Administration: General Responsibilities of Public Water Systems.

R309-105-9. Minimum Water Pressure.

(1) Unless otherwise specifically approved by the Executive Secretary, no water supplier shall allow any connection to the water system where the dynamic water pressure at the point of connection will fall below 20 psi during the normal operation of the water system. Water systems approved prior to January 1, 2007, are required to maintain the above minimum dynamic water pressure at all locations within their distribution system. Existing public drinking water systems, approved prior to January 1, 2007, which expand their service into new areas or supply new subdivisions shall meet the minimum dynamic water pressure requirements in R309-105-9(2) at any point of connection in the new service areas or new subdivisions.

(2) Unless otherwise specifically approved by the Executive Secretary, new public drinking water systems constructed after [March 1, 2006]January 1, 2007 shall be designed and shall meet the following minimum water pressures at points of connection:

(a) 20 psi during conditions of fire flow and fire demand experienced during peak day demand;

(b) 30 psi during peak instantaneous demand; and

(c) 40 psi during peak day demand.

(3) Individual home booster pumps are not allowed as indicated in R309-540-5(4)(c).

 

KEY: drinking water, watershed management

Date of Enactment or Last Substantive Amendment: [March 8, 2006]2006

Notice of Continuation: May 16, 2005

Authorizing, and Implemented or Interpreted Law: 19-4-104; 63-46b-4