TOWN OF HIDEOUT WATER DISTRIBUTION SYSTEM DESIGN STANDARDS, CONSTRUCTION SPECIFICATIONS, AND STANDARD DRAWINGS

Transcription

1 TOWN OF HIDEOUT WATER DISTRIBUTION SYSTEM DESIGN STANDARDS, CONSTRUCTION SPECIFICATIONS, AND STANDARD DRAWINGS REVISED: January 2015

2 Table of Contents 550 Facility Design and Operation: Transmission and Distribution Pipelines Purpose pg Intentionally Left Blank pg Definitions pg General pg Water Main Designs pg Component Materials and Design pg Separation of Water Mains and Transmission Lines from Sewers pg Installation of Water Mains pg Cross Connections and Interconnections pg Water Hauling pg Service Connections and Plumbing pg Transmission Lines pg Operation and Maintenance pg Supplemental Requirements 601 General Construction Requirement pg Materials and Equipment Approvals pg. 17 Appendix Standards Drawings

3 550. Facility Design and Operation: Transmission and Distribution Pipelines Purpose. The purpose of this rule is to provide specific requirements for the design and installation of transmission and distribution pipelines within the Town of Hideout (Town) which deliver drinking water to facilities of public drinking water systems or to consumers. It is intended to be applied in conjunction with State of Utah Administrative rules R through R Collectively, these rules govern the design, construction, operation, and maintenance of public drinking water system facilities. These rules are intended to assure that facilities are reliably capable of supplying water in adequate quantities consistently meeting applicable drinking water quality requirements, and not posing a threat to general public health. The State of Utah Administrative rules at the time this standard was created can be found at Guidance: is included in the Town Standard as recommendations but they are not part of the official standard INTENTIONALLY LEFT BLANK Definitions. "AF" means acre foot and is the volume of water required to cover an acre to a depth of one foot (one AF is equivalent to 325,851 gallons). "Air gap" The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, catch basin, plumbing fixture or other device and the flood level rim of the receptacle. This distance shall be two times the diameter of the effective opening for openings greater than one inch in diameter where walls or obstructions are spaced from the nearest inside edge of the pipe opening a distance greater than three times the diameter of the effective openings for a single wall, or a distance greater than four times the diameter of the effective opening for two intersecting walls. This distance shall be three times the diameter of the effective opening where walls or obstructions are closer than the distances indicated above. "ANSI/NSF" refers to the American National Standards Institute and NSF International. NSF International has prepared at least two health effect standards dealing with treatment chemicals added to drinking water and system components that will come into contact with drinking water, these being Standard 60 and Standard 61. The American National Standards Institute acts as a certifying agency, and determines which laboratories may certify to these standards "Approval" unless indicated otherwise, shall be taken to mean a written statement of acceptance from thetown Engineer. "AWWA" refers to the American Water Works Association located at 6666 West Quincy Avenue, Denver, Colorado Reference within these rules is generally to a particular Standard prepared by AWWA and which has completed the ANSI approval process such as ANSI/AWWA Standard C (AWWA Standard for Disinfecting Water Mains). "Backflow" means the undesirable reversal of flow of water or mixtures of water and other liquids, gases, or other substances into the distribution pipes of the potable water supply from any source. Also see backsiphonage, backpressure and cross-connection. "Backpressure" means the phenomena that occurs when the customer's pressure is higher than the supply pressure, this could be caused by an unprotected cross connection between a drinking water supply and a 1

4 pressurized irrigation system, a boiler, a pressurized industrial process, elevation differences, air or steam pressure, use of booster pumps or any other source of pressure. Also see backflow, backsiphonage and cross connection. "Backsiphonage" means a form of backflow due to a reduction in system pressure which causes a subatmospheric or negative pressure to exist at a site or point in the water system. Also see backflow and cross-connection. "cfs" means cubic feet per second and is one way of expressing flowrate (one cfs is equivalent to gpm). "Combined distribution system" is the interconnected distribution system consisting of the distribution systems of wholesale systems and of the consecutive systems that receive finished water. "Contaminant" means any physical, chemical biological, or radiological substance or matter in water. "Corrosion inhibitor" means a substance capable of reducing the corrosiveness of water toward metal plumbing materials, especially lead and copper, by forming a protective film on the interior surface of those materials. "Cross-Connection" means any actual or potential connection between a drinking (potable) water system and any other source or system through which it is possible to introduce into the public drinking water system any used water, industrial fluid, gas or substance other than the intended potable water. For example, if you have a pump moving non-potable water and hook into the drinking water system to supply water for the pump seal, a crossconnection or mixing may lead to contamination of the drinking water. Also see backsiphonage, backpressure and backflow. "Disinfection" means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents (see also Primary Disinfection and Secondary Disinfection). "Distribution System" means the use of any spring or well source, distribution pipelines, appurtenances, and facilities which carry water for potable use to consumers through a public water supply. Systems which chlorinate groundwater are in this discipline. "Division" means the Utah Division of Drinking Water, who acts as staff to the Director and is also part of the Utah Department of Environmental Quality. "Drinking Water" means water that is fit for human consumption and meets the quality standards of State of Utah Administrative Rule R Common usage of terms such as culinary water, potable water or finished water are synonymous with drinking water "Drinking Water Project" means any work or facility necessary or desirable to provide water for human consumption and other domestic uses which has at least fifteen service connections or serves an average of twenty-five individuals daily for at least sixty days of the year and includes collection, treatment, storage, and distribution facilities under the control of the operator and used primarily with the system and collection, pretreatment or storage facilities used primarily in connection with the system but not under such control. "Engineer" means a person licensed under the Professional Engineers and Land Surveyors Licensing Act, of the Utah Code, as a "professional engineer" as defined therein. "Equivalent Residential Connection" (ERC) is a term used to evaluate service connections to consumers other than the typical residential domicile. Public water system management is expected to review annual metered drinking water volumes delivered to non-residential connections and estimate the equivalent number of residential connections that these represent based upon the average of annual metered drinking water volumes delivered to true single family residential connections. This information is utilized in evaluation of the system's source and storage capacities (refer to State of Utah Administrative Rule R ). 2

5 "Finished water" is water that is introduced into the distribution system of a public water system and is intended for distribution and consumption without further treatment, except as treatment necessary to maintain water quality in the distribution system (e.g., booster disinfection, addition of corrosion control chemicals). "Flowing stream" is a course of running water flowing in a definite channel. "fps" means feet per second and is one way of expressing the velocity of water. "Geologist" means a person licensed under the Professional Geologist Licensing Act, of the Utah Code, as a "professional geologist" as defined therein. "gpd" means gallons per day and is one way of expressing average daily water demands experienced by public water systems. "gpm" means gallons per minute and is one way of expressing flowrate. "gpm/sf" means gallons per minute per square foot and is one way of expressing flowrate through a surface area. "Maximum Contaminant Level" (MCL) means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system. "MG" means million gallons and is one way of expressing a volume of water. "MGD" means million gallons per day and is one way of expressing average daily water demands experienced by public water systems or the capacity of a water treatment plant. "mg/l" means milligrams per liter and is one way of expressing the concentration of a chemical in water. At small concentrations, mg/l is synonymous with "ppm" (parts per million). "Nonpoint source" means any diffuse source of contaminants or pollutants not otherwise defined as a point source. "Peak Day Demand" means the amount of water delivered to consumers by a public water system on the day of highest consumption, generally expressed in gpd or MGD. This peak day will likely occur during a particularly hot spell in the summer. In contrast, some systems associated with the skiing industry may experience their "Peak Day Demand" in the winter. "Peak Instantaneous Demand" means calculated or estimated highest flowrate that can be expected through any water mains of the distribution network of a public water system at any instant in time, generally expressed in gpm or cfs (refer to section 510-9). "Plan Approval" means written approval, by the Town Engineer, of contract plans and specifications for any public drinking water project which have been submitted for review prior to the start of construction. "Public Drinking Water Project" means construction, addition to, or modification of any facility of a public water system which may affect the quality or quantity of the drinking water. "Residual Disinfectant Concentration" ("C" in CT calculations) means the concentration of disinfectant, measured in mg/l, in a representative sample of water. "scfm/sf" means standard cubic foot per minute per square foot and is one way of expressing flowrate of air at standard density through a filter or duct area. "Service Connection" means the constructed conveyance by which a dwelling, commercial or industrial establishment, or other water user obtains water from the supplier's distribution system. Multiple dwelling units such as condominiums or apartments, shall be considered to have a single service connection, if fed by a single 3

6 line, for the purpose of microbiological repeat sampling; but shall be evaluated by the supplier as multiple "equivalent residential connections" for the purpose of source and storage capacities. "Significant deficiencies" means defects in design, operation, or maintenance, or a failure or defects in design, operation, or maintenance, or a failure or malfunction of the sources, treatment, storage, or distribution system that the Director determines to be causing, or have potential for causing, the introduction of contamination into the water delivered to consumers. "System with a single service connection" means a system which supplies drinking water to consumers via a single service line. "Water Supplier" means a person who owns or operates a public drinking water system. "Water System" means all lands, property, rights, rights-of-way, easements and related facilities owned by a single entity, which are deemed necessary or convenient to deliver drinking water from source to the service connection of a consumer(s). This includes all water rights acquired in connection with the system, all means of conserving, controlling and distributing drinking water, including, but not limited to, diversion or collection works, springs, wells, treatment plants, pumps, lift stations, service meters, mains, hydrants, reservoirs, tanks and associated appurtenances within the property or easement boundaries under the control of or controlled by the entity owning the system General. Transmission and distribution pipelines shall be designed, constructed and operated to convey adequate quantities of water at ample pressure, while maintaining water quality Water Main Design. 1. Distribution System Pressure. a. The distribution system shall be designed to maintain minimum pressures as required in State of Utah Administrative Rule R at points of connection, under all conditions of flow. b. When static pressure exceeds 150 psi in new distribution water lines, pressure reducing devices shall be provided on mains in the distribution system where service connections exist. Guidance: The normal working pressure in the distribution system should be between 60 and 100 psi. The requirement for PRV s to be installed when pressures exceed 150 psi only applies to new water pipelines. Systems should implement an operation program to protect water users from excessive pressures. 2. Design Flow Rates. Flow rates used when designing or analyzing distribution systems shall meet the minimum requirements in the current version of the State of Utah Administrative Rule R Hydraulic Analysis. a. All water mains shall be sized following a hydraulic analysis based on flow demands and pressure requirements. 4

7 b. Where improvements will upgrade more than 50% of an existing distribution system in a given phase of a specific project, or where a new distribution system is proposed, a hydraulic analysis of the entire system being upgraded or being installed shall be prepared and submitted for review prior to plan approval. c. Some projects require a hydraulic model. The Town may require submission of a hydraulic modeling report and/ or certification in a format acceptable to the Town Engineer, as outlined in State of Utah Administrative Rule R , prior to plan approval. 4. Minimum Water Main Size. For water mains not connected to fire hydrants, the minimum line size shall be 4 inches in diameter, unless they serve picnic sites, parks, semi-developed camps, primitive camps or roadway rest-stops. Minimum water main size, serving a fire hydrant lateral, shall be 8 inches in diameter unless a hydraulic analysis indicates that required flow and pressures can be maintained by 6-inch lines. Guidance: Generally, velocity in water main should not exceed 5 fps for base water system demands and not to exceed 12 fps under peak instantaneous demand or peak day demand with fire flow imposed. Mains should be designed with sufficient excess capacity to provide for anticipated future connections. 5. Fire Protection. When a public water system is required to provide water for fire flow by the local fire code official, or if the system has installed fire hydrants on existing distribution mains for that purpose: a. The design of the distribution system shall be consistent with the fire flow requirements as determined by the local fire code official. The fire flow requirement for residential subdivisions is 1500 gpm. Guidance: The State Fire Marshall s office has stated that The State adopted fire code recognizes that water mains intended for firefighting need not become subject to retroactive fire flow requirements. As such, an existing system is considered code compliant as long as it is maintained properly and new construction does not alter the fire flow requirement. Water companies are encouraged to make improvements incrementally to avoid a possible moratorium on development due to lack of water, i.e., fire flow. b. The location of fire hydrants shall be consistent with the requirements of the State adopted fire code and as determined by the local fire code official. Guidance: Generally, individual hydrant spacing may range from 200 to 500 feet depending on the area being served. The planning of hydrant locations should be a cooperative effort between the water utility and local fire officials. c. The pipe network design shall permit fire flows to be met at fire hydrant representative locations together with peak day system demands while minimum pressures as 5

8 required in State of Utah Administrative Rule R are maintained at all times and at all points in the distribution system. d. Fire hydrant laterals shall be a minimum of 6 inches in diameter. 6. Geologic Considerations. The character of the soil through which water mains are to be laid shall be considered. Special design and burial techniques shall be employed for Community Water Systems in areas of geologic hazard (e.g., slide zones, fault zones, river crossings, etc.) Guidance: Water supply conduits and major service lines crossing known fault areas should be either designed to accommodate significant differential movement of the ground, or be valved immediately above and below the points of the fault crossing to allow control of water flow, in case of pipe rupture during an earthquake event. Guidance: Water systems should be designed to provide alternative flow paths for major conduits in regions of known geologic hazards. 7. Dead Ends. a. To provide increased reliability of service and reduce head loss, dead ends shall be minimized by making appropriate tie-ins whenever practical. b. Where dead-end mains occur, they shall be provided with a fire hydrant if flow and pressure are sufficient, or with an approved flushing hydrant or blow-off for flushing purposes. Flushing devices shall be sized to provide flows that will give a velocity of at least 2.5 fps in the water main being flushed. No flushing device shall be directly connected to a sewer. 8. Isolation Valves. Sufficient number of valves shall be provided on water mains so that inconvenience and sanitary hazards will be minimized during repairs. Valves shall be located at not more than 500 foot intervals in commercial districts and at not more than one block or 800 foot intervals in other districts. Where systems serve widely scattered customers and where future development is not expected, the valve spacing shall not exceed one mile. 9. Corrosive Soils and Waters. Consideration shall be given to the materials to be used when corrosive soils or waters will be encountered. 10. Special Precautions in Areas of Contamination. Where distribution systems are installed in areas of contamination: a. pipe and joint materials which are not susceptible to contamination, such as permeation by organic compounds, shall be used; and, 6

9 b. non-permeable materials shall be used for all portions of the system including water mains, service connections, and hydrant leads. 11. Water Mains and Other Sources of Contamination. Caution shall be exercised when locating water mains at or near certain sites such as sewage treatment plants or industrial complexes. Individual septic tanks shall be located and avoided. The Town Engineer shall be contacted to establish specific design requirements prior to locating water mains near a source of contamination. Guidance: It is recommended that utility lines are clearly identified and visually different from one another. Consideration shall be given to providing appropriate separation between water and other utilities for operational and contamination reasons Component Materials and Design. 1. ANSI/NSF Standard for Health Effects. All materials that may come in contact with drinking water, including pipes, gaskets, lubricants and O-Rings, shall be ANSI-certified as meeting the requirements of ANSI/NSF Standard 61, Drinking Water System Components - Health Effects. To permit fieldverification of this certification, all components shall be appropriately stamped with the NSF logo. 2. Asbestos and Lead. a. The use of asbestos cement pipe shall not be allowed. b. Pipes and pipe fittings installed shall be lead free in accordance with Section 1417 of the Federal Safe Drinking Water Act. They shall be certified as meeting ANSI/NSF 372 or Annex G of ANSI/NSF 61. Guidance: The Federal Community Fire Safety Act of 2013 exempts fire hydrants from the lead free requirements of Section Standards for Mechanical Properties. Pipe, joints, fittings, valves, and fire hydrants shall conform to ANSI/NSF Standard 61, and applicable sections of AWWA Standards C104-A through C and C through C Used Materials. Only materials that have been used previously for conveying drinking water may be reused. Used materials shall meet the above standards, be thoroughly cleaned, and be restored to their original condition. 5. Fire Hydrants. 7

10 a. Hydrant drains shall not be connected to, or located within, 10 feet of sanitary sewers. Where possible, hydrant drains shall not be located within 10 feet of storm drains. b. Auxiliary valves shall be installed in all hydrant leads. c. Hydrant drains shall be installed with a gravel packet or dry well unless the natural soils will provide adequate drainage. 6. Air Relief Valves and Blow-offs. a. At high points in water mains where air can accumulate, provisions shall be made to remove air by means of hydrants or air relief valves. b. The open end of the air relief vent pipe from automatic valves shall be provided with a #14 mesh, non-corrodible screen and a downward elbow, and where possible, be extended to at least one foot above grade. Alternatively, the open end of the pipe may be extended to as little as one foot above the top of the pipe if the valve s chamber is not subject to flooding, or if it meets the requirements of (7) Chamber Drainage. c. Blow-offs or air relief valves shall not be connected directly to a sewer. d. Adequate number of hydrants or blow-offs shall be provided to allow periodic flushing and cleaning of water lines. e. The air relief valve shall be installed in a manner to prevent from freezing. A shut-off valve shall be provided to permit servicing of an air relief valve. 7. Chamber Drainage. a. Chambers, pits, or manholes containing valves, blow-offs, meters, or other such appurtenances to a distribution system, shall not be connected directly to a storm drain or sanitary sewer. b. Chambers shall be provided with a drain to daylight, if possible. Where this is not possible, underground gravel-filled absorption pits may be used if the site is not subject to flooding and conditions will assure adequate drainage. 8. Control Valve Stations. a. Pressure Reducing Valves (PRV s) i. Isolation Valves shall be installed on both sides of the pressure reducing valve. ii. Where variable flow conditions will be encountered, consideration shall be given to providing parallel PRV lines to accommodate low and high flow conditions. b. Backflow Devices Installation of Backflow devices shall conform to the State-adopted plumbing code. c. Meters Meter installation shall conform to the State-adopted plumbing code and local jurisdictional standards. 8

11 Separation of Water Mains and Transmission Lines from Sewers. 1. Basic Separation Standards. a. The horizontal distance between water lines and sanitary sewer lines shall be at least 10 feet. Where a water main and a sewer line must cross, the water main shall be at least 18 inches above the sewer line. Separation distances shall be measured edge-to-edge (i.e., from the nearest edges of the facilities). b. Water mains and sewer lines shall not be installed in the same trench. c. Where local conditions make it impossible to install water or sewer lines at separation distances required by subsection (a), the sewer pipes are in good condition, and there is not high groundwater in the area, it may be acceptable if the design includes a minimum horizontal separation of 6 feet and a minimum vertical clearance of 18 inches with the waterline being above. In order to determine whether the design is acceptable, the following information shall be submitted as part of the plans for review: i. reason for not meeting the minimum separation standard; ii. location where the water and sewer line separation is not being met; iii. horizontal and vertical clearance that will be achieved; iv. sewer line information including pipe material, condition, size, age, type of joints, thickness or pressure class, whether the pipe is pressurized or not, etc.; v. water line information including pipe material, condition, size, age, type of joints, thickness or pressure class, etc.; vi. ground water and soil conditions; and, vii. any mitigation efforts. d. If the basic separation standards as outlined in subsections (a) though (c) above cannot be met, an exception to the rule can be applied for with additional mitigation measures to protect public health, in accordance with State of Utah Administrative Rule R (2)(b). 2. Special Provisions. The following special provisions apply to all situations: a. The basic separation standards are applicable under normal conditions for sewage collection lines and water distribution mains. More stringent requirements may be necessary if conditions such as high groundwater exist. b. All water transmission lines that may become unpressurized shall not be installed within 20 feet of sewer lines. c. In the installation of water mains or sewer lines, measures shall be taken to prevent or minimize disturbances of the existing line. d. Special consideration shall be given to the selection of pipe materials if corrosive conditions are likely to exist or where the minimum separation distances cannot be met. These conditions may be due to soil type, groundwater, and/or the nature of the fluid conveyed in the conduit, such as a septic sewage which produces corrosive hydrogen sulfide. e. Sewer Force Mains 9

12 i. When a new sewer force main crosses under an existing water main, all portions of the sewer force main within 10 feet (horizontally) of the water main shall be enclosed in a continuous sleeve. ii. When a new water main crosses over an existing sewer force main, the water main shall be constructed of pipe materials with a minimum rated working pressure of 200 psi or equivalent pressure rating. 3. Water Service Laterals Crossing Sewer Mains and Laterals. Water service laterals shall conform to all requirements given herein for the separation of water and sewer lines Installation of Water Mains. 1. Standards. The specifications shall incorporate the provisions of the manufacturer's recommended installation procedures or the following applicable standards: a. For ductile iron pipe, AWWA Standard C600-10, Installation of Ductile Iron Water Mains and Their Appurtenances; b. For PVC pipe, ASTM D2774, Recommended Practice for Underground Installation of Thermoplastic Pressure Piping and PVC Pipe and AWWA Manual of Practice M23, 2003; c. For HDPE pipe, ASTM D2774, Recommended Practice for Underground Installation of Thermoplastic Pressure Piping and AWWA Manual of Practice M55, 2006; and d. For Steel pipe, AWWA Standard C604-11, Installation of Buried Steel Water Pipe- 4 inch and Larger. 2. Bedding. A continuous and uniform bedding shall be provided in the trench for all buried pipe. Stones larger than the backfill materials described below shall be removed for a depth of at least 6 inches below the bottom of the pipe. 3. Backfill. Backfill material shall be tamped in layers around the pipe and to a sufficient height above the pipe to adequately support and protect the pipe. The material and backfill zones shall be as specified by the standards referenced in Subsection (1), above. As a minimum: a. for plastic pipe, backfill material with a maximum particle size of 3/4 inch shall be used to surround the pipe; and b. for ductile iron pipe, backfill material shall contain no stones larger than 2 inches. 4. Dropping Pipe into Trench. Under no circumstances shall the pipe or accessories be dropped into the trench. 5. Burial Cover. 10

13 All water mains shall be covered with sufficient earth or other insulation to prevent freezing, unless they are part of a non-community system that can be shut-down and drained during winter months when temperatures are below freezing. The minimum burial depth, measured at top of pipe, for the projects in the Town of Hideout is 6 below 7000 and 7 at or above 7000 and the maximum burial depth is 10. Burial depths greater than 10 would require approval from the Town Engineer. 6. Thrust Blocking. All tees, bends, plugs, and hydrants shall be provided with thrust blocking, anchoring, tierods, or restraint joints designed to prevent movement. Restraints shall be sized to withstand the forces experienced. 7. Pressure and Leakage Testing. All types of installed pipe shall be pressure tested and leakage tested in accordance with AWWA Standard C Surface Water Crossings. Guidance: Surface water crossings, whether over or under water, present special problems. The Division should be consulted before final plans are prepared. a. Above Water Crossings The pipe shall be adequately supported and anchored, protected from damage and freezing, and accessible for repair or replacement. b. Underwater Crossings i. A minimum cover of 2 feet or greater, as local conditions may dictate, shall be provided over the pipe. ii. When crossing water courses that are greater than 15 feet in width, the following shall be provided: A. Pipe with joints shall be of special construction, having restrained joints for joints within the surface water course and flexible restrained joints at both edges of the water course. B. Isolation valves shall be provided on both sides of the water crossing at locations not subject to high ground water or flooding, so that the section can be isolated for testing or repair. C. A means shall be provided, such as a sampling tap, not subject to flooding, to allow for representative water quality testing on the upstream and downstream sides of the crossing. D. A means shall be provided to pressure test the underground water crossing pipe. 9. Sealing Pipe Ends During Construction. 11

14 The open ends of all pipelines under construction shall be covered and effectively sealed at the end of the day's work. 10. Disinfecting Water Lines. All new water mains or appurtenances shall be disinfected in accordance with AWWA Standard C The specifications shall include detailed procedures for the adequate flushing, disinfection, and microbiological testing of all water mains. On all new and extensive distribution system construction, evidence of satisfactory disinfection shall be provided to the Town Engineer. Samples for coliform analyses shall be collected after disinfection is complete and the system is refilled with drinking water. A standard heterotrophic plate count is advisable. The use of water for public drinking water purposes shall not commence until the bacteriologic tests indicate the water is free from contamination Cross Connections and Interconnections. 1. Physical Cross Connections. There shall be no physical cross connections between the distribution system and pipe, pumps, hydrants, or tanks that may be contaminated from any source, including pressurized irrigation. 2. Recycled Water. Neither steam condensate nor cooling water from engine jackets or other heat exchange devices shall be returned to the drinking water supply. 3. INTENTIONALLY LEFT BLANK Water Hauling. 1. Community Water Systems. Water hauling is not an acceptable permanent source for drinking water distribution in Community Water Systems. 2. INTENTIONALLY LEFT BLANK 3. INTENTIONALLY LEFT BLANK Service Connections and Plumbing. 1. Service Taps. Service taps shall not jeopardize the quality of the system's water. 2. Plumbing. a. Water services and plumbing shall conform to the State-adopted Plumbing Code. b. Pipes and pipe fittings installed, shall be lead-free in accordance with Section 1417 of the federal Safe Drinking Water Act. They shall be certified meeting the ANSI/NSF 372 or Annex G of ANSI/NSF Individual Home Booster Pumps. 12

15 Individual booster pumps shall not be allowed for individual service from the public water supply mains. 4. Service Lines. a. Service lines shall be capped until connected for service. b. The portion of the service line under the control of the water system is considered to be part of the distribution system. 5. Service Meters and Building Service Line. Connections between the service meter and the home shall be in accordance with the Stateadopted Plumbing Code Transmission Lines. 1. Unpressurized Flows. Transmission lines shall conform to all applicable requirements in this rule. Transmission line design shall minimize unpressurized flows. 2. Proximity to Concentrated Sources of Pollution. A water system shall not install an unpressurized transmission line less than 50 feet from a concentrated source of pollution (e.g., septic tanks and drain fields, garbage dumps, pit privies, sewer lines, feed lots, etc.). Furthermore, unpressurized transmission lines shall not be placed in boggy areas or areas subject to the ponding of water Operation and Maintenance. 1. Disinfection After Line Repair. The disinfection procedures of Section 4.7, AWWA Standard C shall be followed if a water main is cut or repaired. 2. Cross Connections. The water system shall not allow a connection that may jeopardize water quality. Cross connections shall be eliminated by physical separation, an air gap, or an approved and properly operating backflow prevention assembly. The water system shall have an ongoing cross connection control program in compliance with R ANSI/NSF Standards. All pipe and fittings used in routine operation and maintenance shall be ANSI-certified as meeting NSF Standard 61 or Standard INTENTIONALLY LEFT BLANK 13

16 In addition to complying with the requirements of 550 Facility Design and Operation: Transmission and Distribution Pipelines all construction activity related to the installation, maintenance and repair of water distribution systems have to comply with the following 600 Supplemental requirements. The hierarchy of compliance shall be the current State of Utah Administrative Drinking Water Rules, then the requirements of the Section 550 and then Section Supplemental Requirements 601 General Construction Requirements Licenses and Permit Required: 1. All water mains and service line construction shall be done by a General Utility Contractor licensed and bonded in Utah. 2. When construction is required within the Town s public right-of-way, contractor shall comply with applicable Town regulations. Removal of Unsuitable Materials: Wherever in excavating the trench for water mains the bottom of the trench exposes peat, soft, clay, quicksand, organic soils, or other material which is unsuitable such material shall be removed and disposed of by the Contractor. The material thus removed shall be replaced by suitable material as directed by a licensed geotechnical engineer. Trench Excavation: The Contractor shall exercise sound engineering and construction practices in excavating the trench and maintaining it so that no damage will occur to any foundation, structure, pole line, pipe line, or other facilities because of slough, slopes, or from any other cause. If, as a result of the excavation, there is disturbance of the ground such as to endanger other property, the Contractor shall immediately take remedial action at his own expense. No act, representation or instruction of the Town or his representatives shall in any way relieve the Contractor from liability for damages or costs that result from trench excavation. Care shall be taken not to excavate below the depth indicated, and excavation below that depth shall be backfilled with selected backfill material and compacted to the satisfaction of the Engineer at the Contractor's expense. The bottom of trenches shall be accurately graded to provide uniform bearing and support for each length of pipe or undisturbed or compacted soil at every point along its entire length, except at the joints. Bell holes shall be excavated to an extent sufficient to relieve bearing pressure at the bell joint. Work shall comply with the "Utah Occupational Safety and Health Rules and Regulations" for the Utah State Industrial Commission. Handling of Pipe: 14

17 All types of pipe shall be handled in such manner as will prevent damage to the pipe, pipe lining or coating. Damage to the pipe, pipe lining or coating shall be repaired to the satisfaction of the Engineer or the damaged pipe shall be removed from the job and methods of handling corrected to prevent further damage. Threaded pipe ends shall be protected by couplings or other means until laid. The pipe and fittings shall be inspected for defects and cast iron pipe, while suspended above grade, shall be rung with a light hammer to detect cracks. Dirt or other foreign material shall be prevented from entering the pipe or pipe joints during handling or laying operations and any pipe or fitting that has been installed with dirt or foreign material in it shall be removed, cleaned and re-laid. (At times when pipe laying is not in progress, the open ends of the pipe shall be closed by watertight plug.) Pipe Bedding and Backfill: Specific Requirements. Engineer shall submit to the Town Engineer for approval a complete system of pipe zone embedment materials and installation requirements and final backfill. Submittal shall include pipe manufactures installation recommendations, soils engineer s recommendations and ANSI/AWWA codes that apply. Engineer should consider environmental impacts of trucking on its selection of imported materials. General Requirements. For all graded streets, including the shoulders, asphalt, and parkway strip located in the Right-of-Way, the backfill shall be compacted to 96% of the maximum modified proctor density at optimal moisture content as determined by the Compaction Control Tests specified in ASTM D and verified by the methods specified in ASTM D or ASTM D The compaction may be reduced to 90% for areas where vehicle traffic will never occur, and/or the most distant five (5) feet of the Right-of-Way with written approval from the Town of Hideout Engineer. Concrete thrust blocking shall be placed at bends, tees, and crosses or as directed by the Engineer. Blocking concrete shall be Class 4000 (1 ½ minus aggregate) concrete mix placed in place. (See Standard Detail). Concrete blocking, when placed as indicated on the Standard Drawings, shall be bearing against solid undisturbed earth at the sides and bottom of the trench excavation and shall be shaped so as not to obstruct access to the joints of the pipe or fittings. Dewatering of Trench: Where water is encountered in the trench, it shall be removed during pipe laying operations and the trench so maintained until the ends of the pipe are sealed and provisions are made to prevent floating of the pipe. Trench water shall not be allowed to enter the pipe at any time. Connections to Existing Mains: 1. The Contractor shall notify the Town of Hideout at least 48 hours (two full working days) in advance of such connections. 2. Existing Town of Hideout water lines can only be shut down by crews authorized by the Town of Hideout Engineer. 15

18 3. The Contractor shall also provide written notice giving the date of the notice, the date and time of the shutdown, and the duration of the shutdown. Major shutdowns shall only occur as approved by the Town. Disruption of Services: Where the connection of new work to old requires interruption of service and notification of customers affected, the Town of Hideout Engineer, and the Contractor shall mutually agree upon a date for connections which will allow ample time to assemble labor and materials, and to notify all customers affected. The Contractor will be required to notify all affected customers, the Town of Hideout Engineer 24 hours in advance of service being interrupted. Wet Tap Connections: Wet tap connections shall not be made on Friday, Saturday, Sunday, Holidays, or after 12:00 Noon subject to approval by the Town of Hideout Engineer. Where connections are made between new work and existing pipelines, such connections shall be made in a thorough, neat manner using suitable and proper fittings to suit the conditions encountered. Each connection with an existing water line shall be made at a time under conditions which will least interfere with normal user consumption and as authorized by the Town of Hideout. Suitable facilities shall be provided for proper dewatering, drainage and disposal of all water removed from the dewatered lines and excavations without damage to adjacent property. Air and/or water testing may be requested by the Town of Hideout Engineer. Testing Records and Documentation: Both the pressure tests and leakage tests shall be recorded by the Contractor with the approved inspector present. Records shall contain the length of pipe tested, size of pipe, type of pipe, rated working pressure of pipe, time and duration of test(s), pressure(s) used, complete list of test equipment used, list of personnel performing the test(s), and any comments about the test. Test records shall be submitted to the Town of Hideout Engineer before the water line will be accepted. Disinfection of Water Lines: Before being placed in service, all new water lines and repaired portions or extensions of existing mains shall be chlorinated and flushed in accordance with these standards. The Contractor shall review the proposed method of chlorination with the Town of Hideout Engineer prior to water line construction and shall schedule the Inspector prior to chlorination of the water line. The Contractor shall be responsible for maintaining the disinfected condition of existing water lines when connecting to, cutting into, repairing, or tapping existing water lines. Mains shall be flushed without using hydrants, unless approved by the Town of Hideout Engineer. Taps required by the Contractor for chlorination or flushing purposes shall be provided by him as a part of the construction of water mains, unless otherwise provided. The Contractor shall be responsible for disposal of heavily chlorinated treated water flushed from mains and shall neutralize the waste water for protection of the environment before disposal into any natural draining channel, sanitary sewer, storm drain, curb and gutter, or onto the ground. In the process of chlorinating newly laid pipe, all valves or other appurtenances shall be operated while the pipe line is filled with the chlorinating agent and under normal operating pressure. 16

19 Twenty four (24) hours after the line is flushed by the Contractor, the Contractor shall take three (3) bacteriological samples from the installed pipe line with the inspector present. The locations of the samples shall be at intervals along the pipe line as directed by the Engineer. The sampling bottles and methods used shall be in accordance with the Utah State Board of Health, and this. Sample results shall be sent to the Town of Hideout Engineer. All disinfection operations shall be observed and recorded by the Inspector. Records shall contain the length of pipe disinfected, size of pipe, type of pipe, location of pipe, date, time, and duration of disinfecting operations, complete list of equipment used and personnel performing the disinfection, and any comments about the disinfection operations. These records shall be submitted to the Engineer. Should the initial treatment result in an unsatisfactory bacterial test, the original chlorination procedure shall be repeated by the Contractor until satisfactory results are obtained. Failure to get a satisfactory test shall be considered as failure of the Contractor to keep the pipe clean during construction, or to properly chlorinate the main, and no additional payment will be made for flushing and rechlorinating. Concrete Thrust Blocking: Concrete thrust blocking shall be placed at bends, tees, and crosses or as directed by the Engineer. Blocking shall be Class 4000 (1 ½ minus aggregate) concrete mix placed in place. (See Standard Detail ). Concrete blocking, when placed as indicated on the Standard Drawings, shall be bearing against solid undisturbed earth at the sides and bottom of the trench excavation and shall be shaped so as not to obstruct access to the joints of the pipe or fittings. Payment for blocking will be included in the unit price for water line installed. 602 Material and Equipment Approvals General: Prior to starting any water system project a complete submittal package shall be submitted to the Town of Hideout for review. The submittal shall be well organized and shall include all relevant manufactures information. If during the project changes are made the contractor shall submit the changes for review. Contractor shall submit a complete Material and Equipment Submittal to the Town. Contractor shall specifically identify any part of their submittal that is not in compliance The Town shall review the submittal for compliance with the standards set forth herein. Review shall not constitute a waiver from the State of Utah Administrative Drinking Water Rules or Section 550 requirements and for acceptance of the type and manufacturer of the products used. Valves for Water Mains: Valves types and valve manufacturer are subject to approval from the Town Engineer. The valves shall be suitable for an ordinary waterworks service intended to be installed in a normal position on buried pipe lines for water distribution systems. All valves shall be Mueller or EJ or approved equal the valves shall have the name or mark of the manufacturer, year valve casting was made, size and working pressure plainly cast in raised letters on the valve body. All valves not in a vault shall be provided with a cast iron valve box of the extension sleeve type, and the correct adjustable height to bring the top of the valve box flush with the finished surface. The valve box shall not be less than (five) 5 inches in diameter, and shall have a minimum thickness of 3/16 inch, and 17

20 shall be provided with suitable base and cover. The word Water shall be cast on the cover. Valve boxes shall be equal to MUELLER H with No. 6 or No. 8 round base as needed. There shall also be furnished to the Town of Hideout, one (1) T handle operating wrench for each five (5) new valves installed on the project. All gate valves shall be inspected upon delivery in the field to insure proper working order before installation. Water Service Connections and Fire Lines: The service connections will be made by the Contractor, in accordance with these Specifications and Standard Drawings. This excludes setting the meter, which will be accomplished by Town of Hideout personnel, only after proper inspection of the service connection at the main service line, yoke, meter box, and lid assembly (furnished by the Contractor). All connections to the TOWN OF HIDEOUT water system including fire lines shall be metered unless otherwise approved by the Town of Hideout Engineer. All service connections including fire lines shall be constructed in accordance with the provisions of this standard up to the first shut-off valve within the building. Service connections will be activated only after inspection, testing, chlorination and flushing of all new water line facilities. Each culinary service connection must be pressure tested in accordance with the provisions of this standard except that the test pressure shall not be less than 50 psi greater than the line pressure. Meter Yoke: Meter yokes for 1" and smaller shall be approved by Town Engineer to verify compatibility with Town water meter; meter fittings will be standard thread. Meter yokes for 1½-inch will be shall be approved by Town Engineer to verify compatibility with Town water meter. Please refer to the appropriate Standard Drawing. High pressure setters shall be used. Meter Box: Meter boxes will be 24-inch diameter for single 1-inch meter installations; and a 48-inch diameter vault for 1½-inch meter. Meter box shall be location is subject to approval by the Town of Hideout Engineer. Meter boxes shall also be insulated, including the lid. Alternative Meter Box: Alternative meter boxes that achieve high degrees of frost protection may be submitted for review and possible approval. Curb Stop and Curb Box: Mueller Oriseal curb valve and cast iron extension-type curb box with arch pattern base with cast iron foot piece as manufactured by Mueller or approved equal Meters: TOWN OF HIDEOUT provides meters. A fee shall be charged. Acquisition, calibration, and distribution will be at the Town of Hideout's discretion. 18

21 Unless otherwise approved by the Town of Hideout Engineer water meters, vaults/boxes, and the associated appurtenances shall be placed in the Town Right-of-Way between 6 (six) and 10 (ten) feet behind the curb/gutter/edge of asphalt and in a landscaped area. Proposed interior placement of water meters must be submitted to the Town of Hideout Engineer at the time the building plans are submitted for initial review. The Town of Hideout will maintain water service lines to the cold side of the water meter yoke or the edge of the Town Right-of-Way, whichever is the shorter distance. If the water meter vault/box is on private property the Town of Hideout will maintain the water meter, yoke, and vault/box only, not the section of line between the right-of-way and the meter box. Hydrants shall be six (6)-inch minimum size with two (2) 2½-inch hose nozzles and one (1) 4½-inch pumper nozzle. Hydrants shall be supplied with O-Ring seals and a six (6)-inch ASA 125 pound flanged inlet. Each hydrant shall be supplied complete with a flanged mechanical joint auxiliary gate valve with box. They shall be EJ Water Master or approved equal. 19