No. 39399 (Amendment): Rule R309-510. Facility Design and Operation:Minimum Sizing Requirements

(Amendment)

DAR File No.: 39399
Filed: 05/15/2015 02:06:34 PM

RULE ANALYSIS

Purpose of the rule or reason for the change:

The Division of Drinking Water was tasked to review the Drinking Water R309-500 series rules for revisions, clarifications, corrections, updates, etc. Additionally, in December of 2014, the Office of the Legislative Auditor General, submitted a report entitled "A Review of the Division of Drinking Water's Minimum Source Sizing Requirements" to the Utah State Legislature. The report commented directly upon the source size requirements included in Rule R309-510. The report recommended that DDW reevaluate the minimum source sizing requirements and clarify the regulatory process for requesting a reduction in the minimum size of a source needed. The proposed amendment clarifies the regulatory process for requesting a reduction in the minimum sizing requirements.

Summary of the rule or change:

The proposed amendments to R309-510 include the following: 1) revise Section R309-510-4 to clarify that water system-specific sizing criteria may be used if a reduction is granted by the director, and add language to state that in addition to meeting the state's minimum sizing requirements, the design of drinking water source and storage capacities may be required to be based on specific requirements imposed by local authorities; 2) revise Section R309-510-5 to clarify the process to obtain a reduction of sizing requirements. Also clarify the requirements for granting a reduction on the basis of limited water use development; 3) revise Subsections R309-510-7(2) and (3) to clearly state that indoor water use and irrigation water use shall be based on the minimums provided by the rule unless a reduction in sizing has been granted by the director; 4) clarify, define, and correct the term "Recreational Home Development" as used in Tables 510-1 and 510-4; 5) clarify irrigation demands in Subsection R309-510-7(3) by adding a statement to take into consideration water losses associated with evaporation, delivery method, pipe leaks, etc., when irrigation demand is included in the design; and 6) allow for the use of Appendix B of the 2015 International Fire Code in determining fire flow when local fire code officials do not provide requirements, including a minimum flow of 1,000 gpm for 60 minutes. Note: This change is based on input from various fire marshals.

State statutory or constitutional authorization for this rule:

• Subsection 19-4-104(1)(a)(ii)

Anticipated cost or savings to:

the state budget:

Proposed amendments to Rule R309-510 are not expected to result in a change in the workload of the Division of Drinking Water and should have no effect on the state budget.

local governments:

Local governments that own and operate public water systems will be affected by the proposed amendments to Rule R309-510. However, the proposed amendments are not expected to result in increased costs or savings for local governments.

small businesses:

Small businesses that own and operate public water systems will be affected by the proposed amendments to Rule R309-510. However, the proposed amendments are not expected to result in increased costs or savings for small businesses.

persons other than small businesses, businesses, or local governmental entities:

Owners, operators, and customers of public water systems are persons directly or indirectly affected by R309-510. Because the proposed amendments to R309-510 are not expected to result in increased costs or savings for public water systems, there should be no new costs or savings for any of these persons because of the proposed amendments.

Compliance costs for affected persons:

Facility design and operation requirements are not expected to change because of the proposed amendments to Rule R309-510. Therefore, compliance costs should be unaltered as a result of the proposed amendments.

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

This proposed rule amendment will have no negative fiscal impact on businesses because the amendments will not have a significant effect on public water systems.

Amanda Smith, 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 WaterRoom Third Floor
195 N 1950 W
SALT LAKE CITY, UT 84116-3085

Direct questions regarding this rule to:

• Bernie Clark at the above address, by phone at 801-536-0092, by FAX at , 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:

07/01/2015

This rule may become effective on:

07/08/2015

Authorized by:

Ken Bousfield, Director

RULE TEXT

R309. Environmental Quality, Drinking Water.

R309-510. Facility Design and Operation: Minimum Sizing Requirements.

R309-510-1. Purpose.

This rule specifies the minimum requirements for the sizing of public drinking water facilities such as sources ([along with]and their associated treatment facilities), storage tanks, and pipelines. It is intended to be applied in conjunction with R309-500 through R309-550. Collectively, these rules govern the design, construction, operation and maintenance of public drinking water system facilities. These rules are intended to assure that such facilities are reliably capable of supplying adequate quantities of water which consistently meet applicable drinking water quality requirements and do not pose a threat to general public health.

 

R309-510-2. Authority.

This rule is promulgated by the Drinking Water Board as authorized by Title 19, Environmental Quality Code, Chapter 4, Safe Drinking Water Act, Subsection 104(1)(a)(ii) of the Utah Code and in accordance with Title 63G, Chapter 3 of the same, known as the Administrative Rulemaking Act.

 

R309-510-3. Definitions.

Definitions for certain terms used in this rule are given in R309-110 but may be further clarified herein.

 

R309-510-4. General.

(1) This rule provides [estimates of]minimum quantities and flow rates [which]that shall be used in the design of new systems and in the evaluation of water source, storage facility, and pipeline capacities, [or if ]unless a public water system has obtained a capacity reduction per R309-510-5. Water demand may vary significantly depending on water system size, type, land use, urbanization, location, precipitation, etc. Therefore, public water systems may submit system-specific water use data to justify alternative sizing requirements in accordance with R309-510-5.[there is an absence of data collected by the public water system meeting the required confidence level for a reduction mentioned below, when evaluating water sources, storage facilities and pipelines. Within each of these three broad categories, the designer shall ascertain the contributions on demand from the indoor use of water, the outdoor use of water, and fire suppression activities (if required by local authorities). These components must be added together to determine the total demand on a given facility.]

(2) When designing a public water system, the sizing requirements for indoor water use, irrigation, and fire suppression (as required by the local fire code official) shall be included as appropriate.

(3) Local authorities may impose more stringent design requirements on public water systems than the minimum sizing requirements of this rule.

(4) Public water systems shall consider daily, weekly, monthly, seasonal, and yearly variations of source capacity and system demand and shall verify that the capacities of drinking water facilities are sufficiently sized.

(5) The Director may modify the sizing requirements based on the unique nature and use of a water system.

 

R309-510-5. Reduction of Sizing Requirements.

[If acceptable data are presented, certain number of days of peak day demand to establish minimum source capacity; certain number of years of annual demand to establish minimum water right requirements; and certain number of readings of peak hourly demand to establish minimum peak instantaneous demand; showing that the requirements made herein are excessive for a given project, the requirements may be appropriately reduced to the 90th percentile of readings, on a case by case basis by the Director. In the case of Recreational Home Developments, in order to qualify for a quantity reduction, not only must the actual water consumption be less than quantities required by rule but enforceable policy restrictions must have been approved which prevent the use of such dwellings as a permanent domicile and these restrictions shall have been consistently enforced. The Director may re-consider any reduced minimums if the nature and use of the system changes.

] (1) Water systems that want to use system-specific design criteria that are below the state's minimum sizing requirements may submit a request for a reduction to the Director. Each request shall include supporting information justifying the reduction in source, storage, or pipeline sizing.

(2) Depending on the reduction being sought, the supporting information may include actual water use data representing peak day demand, average day demand for indoor and irrigation uses, fire flow requirements established by the local fire code official, etc. Each reduction request and supporting information will be reviewed on a case-by-case basis because of the wide variety of factors to be considered, such as water system configuration and size, built-in redundancy, water user type, safety factors, method and quality of data collected, water losses, reliability of the source, etc.

(3) Prior to collecting or compiling water use data for a reduction request, a public water system shall consult with the Division of Drinking Water to identify the information needed for a reduction request and to establish a data collection protocol.

(4) The data submitted for a source reduction request shall be sufficient to account for daily, seasonal, and yearly variations in source and demand.

(5) If data justifying a reduction are accepted by the Director, the sizing requirements may be reduced. The requirements shall not be less than the 90th percentile of acceptable readings.

(6) If a reduction is granted on the basis of limited water use, enforceable water use restrictions must be in place, shall be consistently enforced by the water system or local authority, and shall be accepted by the Director.

(7) The Director may re-evaluate any reduction if the nature or use of the water system changes.

 

R309-510-6. Water Conservation.

Drinking water systems shall use the water resources of the state efficiently. The minimum sizing requirements of this rule [is]are based [up]on typical [current ]water consumption patterns in the State of Utah. [They may be excessive in certain settings w]Where legally[ ]-enforceable water conservation measures exist[.], [In these cases ]the sizing requirements [made ]in this [section]rule may be reduced on a case-by-case basis by the Director.

 

R309-510-7. Source Sizing.

(1) Peak Day Demand and Average Yearly Demand.

Sources shall legally and physically meet water demands under two [separate ]conditions[.]:

(a) [First, they]The water system's source capacity shall be able to meet the anticipated water demand on the day of highest water consumption[.],[This is referred to as the] which is the peak day demand.

(b) [Second, they]The water system's source capacity shall also be able to provide one year's supply of water, which is the average yearly demand.

(2) [Estimated ]Indoor Water Use.

[In the absence of firm water use data, ]Tables 510-1 and 510-2 shall be used [to estimate ]as the minimum sizing requirements for peak day demand and average yearly demand for indoor water use unless a public water system has obtained a reduction per R309-510-5.

 

TABLE 510-1
Source Demand for Indoor Use

                                  Peak                   Average Type of Connection           Day Demand             Yearly Demand   Year-round use    Residential               800 gpd/conn        146,000 gal./conn     Equivalent     Residential     Connection (ERC )         800 gpd/ERC         146,000 gal./ERC  Seasonal/Non-residential  use    Modern Recreation Camp     60 gpd/person      ([s]See [n]Note 1)    Semi-Developed Camp     a.  with pit privies       5 gpd/person      ([s]See [n]Note 1)     b.  with flush toilets    20 gpd/person      ([s]See [n]Note 1)    Hotel, Motel, and Resort  150 gpd/unit        ([s]See [n]Note 1)    Labor Camp                 50 gpd/person      ([s]See [n]Note 1)    Recreational Vehicle    Park                      100 gpd/pad         ([s]See [n]Note 1)    Roadway Rest Stop           7 gpd/vehicle     ([s]See [n]Note 1)    Recreational Home    Development      (i.e., developments     with limited     water use)    (See Note 2)              400 gpd/conn       ([s]See [n]Note 1)        NOTES FOR TABLE 510-1:        Note 1.  A[nnual]verage yearly demand shall be [based on] calculated by multiplying the number of days [the system will be open during the year times ]in the designated water system operating period by the peak day demand unless a reduction has been granted in accordance with R309-510-5[data acceptable to the Director, with a confidence level of 90% or greater showing a lesser annual consumption, can be presented].        Note 2. To be considered a Recreational Home Development (i.e., developments with limited water use) as listed in Table 510-1, dwellings shall not have more than 8 plumbing fixture units,in accordance with the state-adopted plumbing code, and shall not be larger than 1,000 square feet.  For a new not-yet-constructed development to be considered as a development with limited water use, it must have enforceable restrictions in place that are enforced by the water system or local authority and are accepted by the Director.

 

 

TABLE 510-2
Source Demand for Indoor Use - Individual Establishments[^(a)](Note 1)
[(Indoor Use)]

  Type of Establishment                      Peak Day Demand                                                 (gpd)                                            (Notes 2 and 3) Airports  a.  per passenger                                  3  b.  per employee                                  15 Boarding Houses  a.  for each resident boarder and employee        50  b.  for each nonresident boarders                 10 Bowling Alleys, per alley  a.  with snack bar                               100  b.  with no snack bar                             85 Churches, per person                                5 Country Clubs  a.  per resident member                          100  b.  per nonresident member present                25  c.  per employee                                  15 Dentist's Office  a.  per chair                                    200  b.  per staff member                              35 Doctor's Office  a.  per patient                                   10  b.  per staff member                              35 Fairgrounds, per person                             1 Fire Stations, per person  a.  with full-time employees and food prep.       70  b.  with no full-time employees and no food prep.  5 Gyms  a.  per participant                               25  b.  per spectator                                  4 Hairdresser  a.  per chair                                     50  b.  per operator                                  35 Hospitals, per bed space                          250 Industrial Buildings, per 8 hour shift,  per employee (exclusive of industrial waste)  a.  with showers                                  35  b.  with no showers                               15 Launderette, per washer                           580 Movie Theaters  a.  auditorium, per seat                           5  b.  drive-in, per car space                       10 Nursing Homes, per bed space                      280 Office Buildings and Business Establishments,  per shift, per employee (sanitary wastes only)  a.  with cafeteria                                25  b.  with no cafeteria                             15 Picnic Parks, per person (toilet wastes only)       5 Restaurants  a.  ordinary restaurants (not 24 hour service)    35 per seat  b.  24 hour service                               50 per seat  c.  single service customer utensils only          2                                                    per customer  d.  or, per customer served  (includes toilet and kitchen wastes)              10 Rooming House, per person                          40 Schools, per person  a.  boarding                                      75  b.  day, without cafeteria, gym or showers        15  c.  day, with cafeteria, but no gym or showers    20  d.  day, with cafeteria, gym and showers          25 Service Stations[(b) ,]  a.  per vehicle served, or                        10   b.  per gas pump                                 250 Skating Rink, Dance Halls, etc., per person  a.  no kitchen wastes                             10  b.  Additional for kitchen wastes                  3 Ski Areas, per person (no kitchen wastes)          10 Stores  a.  per public toilet room                       500  b.  per employee                                  11 Swimming Pools and Bathhouses[(c) ],  per person     10  (Note 4) Taverns, Bars, Cocktail Lounges, per seat          20 Visitor Centers, per visitor                        5        NOTES FOR TABLE 510-2:       Note 1. When more than one use will occur, the multiple uses shall be considered in determining total demand. Small industrial plants maintaining a cafeteria or showers and club houses or motels maintaining swimming pools or laundries are typical examples of multiple uses. Uses other than those listed above shall be considered in relation to established demands from known or similar installations.      [1]Note 2.  Source capacity must at least equal the peak day demand of the system.  [Estimate ]Determine this by assuming the facility is used to its maximum , e.g., the physical capacity of the facility.      [2]Note 3.  [Generally, storage volume must at least equal one average day's demand]To determine the average day demand for establishments listed in Table 510-2, divide the peak day demand by 2, unless alternative data are accepted by the Director.      [3.  Peak instantaneous demands may be estimated by fixture unit analysis as per Appendix E of the 2006 International Plumbing Code.      (a)  When more than one use will occur, the multiple use shall be considered in determining total demand. Small industrial plants maintaining a cafeteria and/or showers and club houses or motels maintaining swimming pools and/or laundries are typical examples of multiple uses.  Uses other than those listed above shall be considered in relation to established demands from known or similar installations.      (b)  or 250 gpd per pump,      (c)  20 x {Water Area (Ft2) / 30} + Deck Area (Ft2)]       Note 4. Or Peak Day Demand = 20 x (Water Area (ft2)/30) + Deck Area (ft2)

 

(3) [Estimated Outdoor]Irrigation Use.

[In the absence of firm water use data, ]If a water system provides water for irrigation, Table 510-3 shall be used to [estimate ]determine the peak day demand and average yearly demand for [outdoor ]irrigation water use. The following procedure shall be used:

(a) Determine the location of the water system on the map entitled Irrigated Crop Consumptive Use Zones and Normal Annual Effective Precipitation, Utah as prepared by the Soil Conservation Service (available from the Division). Find the numbered zone, one through six, in which the water system is located (if located in an area described "non-arable" find nearest numbered zone).

(b) Determine the net number of acres which may be irrigated.[This is generally done by starting with the gross acreage, then subtract out any area of roadway, driveway, sidewalk or patio pavements along with housing foundation footprints that can be reasonably expected for lots within a new subdivision or which is representative of existing lots. Before any other land area which may be considered "non-irrigated" (e.g. steep slopes, wooded areas, etc.) is subtracted from the gross area, the Director shall be consulted and agree that the land in question will not be irrigated.]

(c) Refer to Table 510-3, which assumes direct application of water to vegetation, to determine peak day demand and average yearly demand for [outdoor ]irrigation use.

(d) [The results of the indoor use and outdoor use tables shall be added together and source(s) shall be legally and physically capable of meeting this combined demand] Consider water losses due to factors such as evaporation, irrigation delivery method, overwatering, pipe leaks, etc. Apply a safety factor to the irrigation demand in the design accordingly.

 

TABLE 510-3
Source Demand for Irrigation
[(Outdoor Use)]

  Map Zone      Peak Day Demand         Average Yearly Demand             (gpm/irrigated acre)       (AF/irrigated acre)                                              (Note 1)     1                2.26                      1.17    2                2.80                      1.23    3                3.39                      1.66    4                3.96                      1.87    5                4.52                      2.69    6                4.90                      3.26        NOTE FOR TABLE 510-3:      Note 1. The average yearly demand for irrigation water use (in acre-feet per irrigated acre) is based on 213 days of irrigation, e.g., April 1 to October 31.

 

(4) [Accounting for ]Variations in Source Yield.[The design engineer shall consider whether flow from the source(s) may vary. Where flow varies, as is the case for most springs, the minimum flow rate shall be used in determining the number of connections which may be supported by the source(s). Where historical records are sufficient, and where peak flows from the source(s) correspond with peak demand periods, the Director may grant an exception to this requirement.]

(a) Water systems shall consider that flow from sources may vary seasonally and yearly. Where flow varies, the number of service connections supported by a source shall be based on the minimum seasonal flow rate compared to the corresponding seasonal demand.

(b) Where source capacity is limited by the capacity of treatment facilities, the maximum number of service connections shall be determined using the treatment plant design capacity instead of the source capacity.

 

R309-510-8. Storage Sizing.

(1) General.

Each public water system, or storage facility serving connections within a specific area, shall provide:

(a) equalization storage volume, to satisfy average day demands for water for indoor use [as well as outdoor ]and irrigation use,

(b) fire [suppression ]flow storage volume, if the water system is equipped with fire hydrants [and ]intended to provide fire suppression water or as required by the local fire code official, and

(c) emergency storage, if deemed appropriate by the water supplier or the Director[, to meet demands in the event of an unexpected emergency situation such as a line break or a treatment plant failures].

(2) Equalization Storage.

(a) All public drinking water systems shall [be ]provide[d with] equalization storage. The amount of equalization storage [which must be provided ]varies with the nature of the water system, the extent of [outdoor ]irrigation use, and the location and configuration of the water system.

(b) Table 510-4 lists [R]required equalization storage for indoor use[ is provided in Table 510-4]. Storage requirements for non-community systems not listed in this table shall be determined by calculating the average day demands from the information given in Table 510-2.

 

TABLE 510-4
Storage Volume for Indoor Use

              Type                         Volume Required                                             (gallons)            Community Systems Residential;  per single resident service connection          400 Non-Residential;  per Equivalent Residential Connection (ERC)     400             Non-Community Systems Modern Recreation Camp; per person                30 Semi-Developed Camp; per person  a.  with Pit Privies                              2.5  b.  with Flush Toilets                           10 Hotel, Motel and Resort; per unit                 75 Labor Camp; per unit                              25 Recreational Vehicle Park; per pad                50 Roadway Rest Stop; per vehicle                     3.5 Recreational Home Development  (i.e., developments with limited water use); per connection (See Note 2 in Table 510-1)       400

 

(c) Where [the]a drinking water system provides water for [outdoor ]irrigation use, [such as the irrigation of lawns and gardens,]Table 510-5 shall be used to determine the minimum equalization storage volumes for irrigation[estimated in Table 510-5 shall be added to the indoor volumes estimated in Table 510-4]. The procedure for determining the map zone and irrigated acreage for using Table 510-5 is outlined in [Section ]R309-510-7(3).

 

TABLE 510-5
Storage Volume for [Outdoor ]Irrigation Use

  Map Zone                           Volume Required                               (gallons/irrigated acre)    1                                   1,782    2                                   1,873    3                                   2,528    4                                   2,848    5                                   4,081    6                                   4,964

 

(3) Fire [Suppression ]Flow Storage.

[Fire suppression storage shall be required if the water system is intended to provide fire fighting water as evidenced by fire hydrants connected to the piping. The design engineer shall consult with the local fire suppression authority regarding needed fire flows in the area under consideration. This information shall be provided to the Division. Where no local fire suppression authority exists, needed fire suppression storage shall be assumed to be 120,000 gallons (1000 gpm for 2 hours).

] (a) Fire flow storage shall be provided if fire flow is required by the local fire code official or if fire hydrants intended for fire flow are installed.

(b) Water systems shall consult with the local fire code official regarding needed fire flows in the area under consideration. The fire flow information shall be provided to the Division during the plan review process.

(c) When direction from the local fire code official is not available, the water system shall use Appendix B of the International Fire Code, 2015 edition, for guidance. Unless otherwise approved by the local fire code official, the fire flow and fire flow duration shall not be less than 1,000 gallons per minute for 60 minutes.

(4) Emergency Storage.

Emergency storage shall be considered during the design process. The amount of emergency storage shall be based upon an assessment of risk and the desired degree of system dependability. The Director may require emergency storage when it is warranted to protect public health and welfare.

 

R309-510-9. Distribution System Sizing.

(1) General Requirements.

The distribution system shall be designed to [insure]ensure adequate flow and that minimum water pressures as required in R309-105-9 exist at all points within the distribution system.[If the distribution system is equipped with fire hydrants, the Division will require a letter from the local fire authority stating the fire flow and duration required of the area to insure the system shall be designed to provide minimum pressures as required in R309-105-9 to exist at all points within the system when needed fire flows are imposed upon the peak day demand flows of the system.]

(2) [Indoor Use, Estimated ]Peak Instantaneous Demand for Indoor Water Use.

(a ) Large or complex water systems may determine peak instantaneous demand using hydraulic modeling. The hydraulic model must either apply an instantaneous peaking factor to account for peak instantaneous demand or use actual peak instantaneous water flow data.

([a]b) [For community water systems and large non-community systems]Alternatively, the peak instantaneous demand for [each]a single pipeline shall be [assumed ]calculated for indoor use[as] using the following equation:

Q = 10.8 x N ^0.64

where N equals the total number of ERC's, and Q equals the total flow (gpm) delivered to the total connections served by that pipeline.

(c) For Recreational Vehicle Parks, the peak instantaneous flow for indoor use shall be based on the following:

 

TABLE 510-6

 Peak Instantaneous Demand  for Indoor Water Use for Recreational Vehicle Parks  Number of Connections                     Formula       0 to 59                             Q = 4N      60 to 239                            Q = 80 + 20N0.5     240 or greater                        Q = 1.6N       NOTES FOR TABLE 510-6:      Q is total peak instantaneous demand (gpm). [and ]N is the maximum number of connections.  However, if the only water use is via service buildings, the peak instantaneous demand shall be calculated for the number of  plumbing fixture units as presented in [Appendix E of the 2006 International Plumbing Code]the state-adopted plumbing code.

 

([b]d) For small non-community water systems, the peak instantaneous demand [to be estimated ]for indoor water use shall be calculated on a per-building basis for the number of plumbing fixture units as presented in [Appendix E of the 2006 International Plumbing Code]the state-adopted plumbing code.

(3) [Outdoor Use, Estimated ]Peak Instantaneous Demand for Irrigation Use.

Peak instantaneous demand [to be estimated ]for [outdoor]irrigation use is given in Table 510-7. The procedure for determining the map zone and irrigated acreage for using Table 510-7 is outlined in [Section ]R309-510-7(3).

 

TABLE 510-7

 Peak Instantaneous Demand for [Outdoor ]Irrigation Use  Map Zone                      Peak Instantaneous Demand                                  (gpm/irrigated acre)     1                                     4.52    2                                     5.60    3                                     6.78    4                                     7.92    5                                     9.04    6                                     9.80
 
  

(4) Fire Flow[s].

[(a) Distribution systems shall be designed to deliver needed fire flows if fire hydrants are provided. The design engineer shall consult with the local fire suppression authority regarding needed fire flows in the area under consideration. This information shall be provided to the Division. Where no local fire suppression authority exists, needed fire flows shall be assumed to be 1000 gpm unless the local planning commission provides a letter indicating that the system will not be required to provide any fire flows, in which case fire hydrants will not be allowed to be installed on any mains.

(b) If a distribution system is equipped with fire hydrants, the system shall be designed to insure that minimum pressures required by R309-105-9 exist at all points within the system when fire flows are added to the peak day demand of the system. Refer to Section R309-510-7 for information on determining the peak day demand of the system.

] (a) Distribution systems shall be designed to deliver needed fire flow if fire flow is required by the local fire code official or if fire hydrants intended for fire flow are provided. The distribution system shall be sized to provide minimum pressures as required by R309-105-9 to all points in the distribution system when needed fire flows are imposed during peak day demand in the distribution system.

(b) The water system shall consult with the local fire code official regarding needed fire flow in the area under consideration. The fire flow information shall be provided to the Division during the plan review process.

(c) If direction from the local fire code official is not available, the water system shall use Appendix B of the International Fire Code, 2015 edition, for guidance. Unless otherwise approved by the local fire code official, the fire flow and fire flow duration shall not be less than 1,000 gallons per minute for 60 minutes.

 

KEY: drinking water, minimum sizing, water conservation

Date of Enactment or Last Substantive Amendment: [August 28, 2013]2015

Notice of Continuation: March 13, 2015

Authorizing, and Implemented or Interpreted Law: 19-4-104

 

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