A. 
Any proposed extension of the Langley water system must be approved in advance by the department of public works. All extensions must conform to Washington State Department of Health, city of Langley water system plan, as adopted or hereafter amended, and Langley fire department requirements.
B. 
In designing and planning for any development, it is the developer's responsibility to see that adequate water for both domestic use and fire protection is attainable. The developer must show, in the proposed plans, how water will be supplied and whether water flow and pressure will be adequate in case of fire. An analysis of the system shall be required if it appears that the system is inadequate.
C. 
Anyone who wishes to extend or connect to the city's water system should contact the department of public works for a water extension/connection fee estimate. This fee estimate is an estimate of the costs due the city for a waterline extension or connection.
D. 
Prior to the release of any water meters, all public works improvements must be completed and approved including granting of right-of-way or easements, and all applicable fees must be paid.
E. 
Issuance of building permits for new construction of single-family subdivisions shall not occur until final public works approval of utility installation is given.
F. 
For commercial projects, building permits may be issued upon completion and acceptance of the required fire protection facilities. A performance bond, in accordance with Section 15.01.075, will be required for the remaining public works improvements. Certificate of occupancy will not be issued until final public works approval is given for all improvements.
(Ord. 743, 1997)
A. 
The design of any water extension/connection shall conform to city standards and any applicable standards as set forth herein and in Sections 15.01.025 and 15.01.040.
B. 
The layout of extensions shall provide for the future continuation and/or "looping" of the existing system as determined by the city. In addition, main extensions shall be extended as required in Section 15.01.030.
C. 
A copy of the general notes for water line installation may be obtained from the Langley public works department.
(Ord. 743, 1997)
A. 
Water mains shall be sized to provide adequate domestic plus fire flow at the required residual pressure. See Section 15.01.415 for fire flow requirements.
The minimum water main size shall be eight inches diameter as long as fire flow requirements can be met. Larger size mains are required in specific areas outlined in the Langley comprehensive water system plan. Nothing shall preclude the city from requiring the installation of a larger sized main in areas not addressed in the comprehensive water system plan if the city determines a larger size is needed to meet fire protection requirements or for future service. No dead-end eight-inch main shall be longer than 800 lineal feet unless approved by the city engineer.
B. 
All pipe for water mains shall have flexible gasketed joints and shall comply with one of the following types:
Ductile iron pipe: Ductile iron pipe shall conform to AWWA C151 Class 52 and have a cement mortar lining conforming to AWWA C104. All pipes shall be joined using nonrestrained joints which shall be rubber gaskets, push-on type or mechanical joint, conforming to AWWA C111.
PVC pipe: All PVC pipe shall conform to the latest revision of the following specifications: Four-inch through 12-inch pipe shall meet AWWA C900 standards.
C. 
All fittings for ductile iron pipe or PVC pipe shall be ductile iron compact fittings conforming to AWWA C153 or Class 250 gray iron conforming to AWWA C110 and C111. All fittings shall be cement mortar lined conforming to AWWA C104. Plain end fittings shall be ductile iron if mechanical joint retainer glands are installed on the plain ends. All fittings shall be connected by flanges or mechanical joints.
D. 
All nonmetallic pipe and services shall be installed with continuous tracer tape installed 12 to 18 inches under the final ground surface. No breaks or splices will be allowed. A continuous loop shall be placed from the main line to the meter box and back to the main line. The marker shall be plastic nonbiodegradable, metal core or backing which can be detected by a standard metal detector. Tape shall be Terra Tape "D" or approved equal. In addition to tracer tape, install 14-gauge coated copper wire, taped to the top of pipe, brought up and tied off at valve body.
E. 
The minimum cover for all water mains from top of pipe to finish grade shall be 36 inches unless otherwise approved by the city engineer.
(Ord. 743, 1997)
A. 
The developer's engineer shall be responsible for determining the scope of work for connection to existing water mains.
B. 
It shall be the contractor's responsibility to field verify the location and depth of the existing main and the fittings required to make the connections to the existing mains.
(Ord. 743, 1997)
A. 
The contractor shall give the city (public works, fire department and police department) a minimum of 72 hours' notice of any planned connection to an existing pipeline. This includes live taps. Notice is required so any disruptions to existing services can be scheduled. The contractor shall notify customers involved or affected of the water service interruption 24 hours in advance of the interruption. The contractor shall make every effort to schedule water main construction with a minimum interruption of water service.
B. 
In certain situations, the city may dictate scheduling of water main shutdowns to avoid shutdowns during specific periods to existing customers.
(Ord. 743, 1997)
A. 
The lateral from the service main to the fire hydrant shall be ductile iron cement mortar lined Class 52 no less than six inches in diameter.
B. 
Fire hydrants shall have two two-and-one-half-inch outlets and one four-and-one-half-inch pumper port outlet. All outport threads shall be National Standard thread. The valve opening shall be five-and-one-quarter-inch diameter. The hydrant shall have a positive and automatic barrel drain and shall be of the "safety" or break away style. Hydrants shall be Mueller Centurion or approved equal. All hydrants shall be bagged until system is approved.
C. 
Fire hydrants shall be set as shown in the standard drawings.
D. 
Fire hydrants must be installed, tested, and accepted prior to the issuance of a building permit.
(Ord. 743, 1997)
A. 
All valves and fittings shall be ductile iron with ANSI flanges or mechanical joint ends. All existing valves shall be operated by city employees only.
B. 
Valves shall be installed in the distribution system at sufficient intervals to facilitate system repair and maintenance, but in no case shall there be less than one valve every 1,000 feet. Generally, there shall be two valves on each tee and three valves on each cross. Specific requirements for valve spacing will be made at the plan review stage.
C. 
Gate Valves, Six-Inch to 12-Inch. The design, materials and workmanship of all gate valves shall conform to, or exceed the requirements of AWWA C509-80 latest revision. Gates valves shall be resilient wedge nonrising stem (NRS) with two internal O-ring stem seals. Gate valves shall be Mueller A-2360. Gate valves shall be used on all six- to 12-inch lines.
D. 
Butterfly Valves. Butterfly valves shall conform to AWWA C504, Class 150B, with cast iron short body and O-ring stem seals. Butterfly valves shall be Mueller, Lineal III, Kennedy, Pratt Groundhog, or Allis Chalmers. Butterfly valves shall be used on all lines 14 inches and larger.
E. 
Valve Box. All valves shall have a standard cast iron water valve box set to grade. If valves are not set in paved area, a three-foot by three-foot by four-inch concrete pad shall be set around each valve box at finished grade. In areas where valve box falls in road shoulder, the ditch and shoulder shall be graded before placing asphalt or concrete pad.
F. 
Valve Marker Post. Valve marker posts shall be four-inch by four-inch reinforced concrete or schedule 40 steel posts five feet long stamped with "W" and distance to valve. Post shall be painted with one base coat and two coats blue oil base enamel.
(Ord. 743, 1997)
Steel casing pipe shall be schedule 20 steel or equal. Pipe spacers shall be Cascade style CC5 with eight-inch runners or equal. Casing pipe and spacers shall be sized for pipe being installed. Install minimum of three spacers per section of pipe.
(Ord. 743, 1997)
A. 
Air and vacuum release valves (ARV) shall be Crispin combination air release valve or approved equal.
B. 
The installation shall be set at the high point of the line when required. Where possible, pipes are to be graded to prevent the need for an air release valve. Air release valves may not be required when services or hydrants are in the vicinity.
(Ord. 743, 1997)
If a fire hydrant is not located at the end of a dead-end main, a blowoff assembly shall be required. On water mains which will be extended in the future, the valve which operates the blowoff assembly shall be the same size as the main and provided with a concrete thrust block. The pressure rating for blowoff assemblies shall be 200 psi. Installation shall be as shown on standard drawings.
(Ord. 743, 1997)
A. 
All water system connections to serve buildings or properties with domestic potable water, fire sprinkler systems, or irrigation systems shall comply with the minimum backflow requirements as established by the State of Washington Department of Health (DOH) and the city of Langley.
B. 
The installation of all backflow devices is required to protect the existing water system and users from possible contamination.
C. 
The developer shall provide public works with the certificate for testing of any backflow prevention device before releasing the certificate of occupancy on any building. A list of approved testers may be obtained from Washington Environmental Training Resource Center (WETRC) located in Auburn, Washington.
D. 
The building official will witness the test of the fire line. The contractor shall provide the city with a copy of the certificate for underground piping. In any situation, the building official will not witness the test of the fire protection supply line until public works has tested and approved the water main up to the fire line.
(Ord. 743, 1997)
A. 
All service connections relating to new development shall be installed, at a minimum depth of 36 inches, to the property line by the developer at the time of mainline construction. After the lines have been constructed, tested and approved, the owner may apply for a water meter. The city will install a water meter after the application has been made and all applicable fees have been paid. Water meters will be set only after system is inspected and approved.
B. 
When water is desired to a parcel fronting an existing main but not served by an existing setter, an application must be made to the city. Upon approval of the application and payment of all applicable fees, the city will tap the main, and install the meter, box, and setter. The developer shall be responsible for excavating the main line for tapping, ditch preparation for service installation (including boring if required) and backfilling the excavation upon completion of the installation by city forces. On installations that require a street crossing, boring and conduit installation may be required by the director of public works at the developer's expense.
C. 
Service lines shall be three-quarter-inch minimum, high density polyethylene pipe, minimum pressure class 200 psi, iron pipe size. Service lines one and one-half inch and larger shall be minimum pressure class 200 psi, copper tube size. Service lines shall be installed 90 degrees off the main. Tracer tape and wire wrapped around the pipe shall be installed on all service lines.
D. 
Service saddle shall be all bronze with stainless steel straps and shall be Romac style 202S, Rockwell 317 or approved equal. All clamps shall have rubber gasket and iron pipe threaded outlets.
E. 
Corporation stop shall be all bronze and shall be Mueller type H15005 or approved equal with iron pipe threads conforming to AWWA C 800.
F. 
Meter setters shall be Mueller B-2404-2 (locking angle valve with dual check) with dual purpose end connections, 15-inch minimum.
G. 
Meter boxes shall be Brooks Standard Series 1419, Carson Series 1419 (plastic) or Fogtite #1D.
(Ord. 743, 1997)
The location of all service lines shall be marked on the face or top of the cement concrete curb, where curbs are available, with a "W" one-quarter inch into concrete.
(Ord. 743, 1997)
A. 
The contractor shall maintain a minimum of 18 inches of vertical separation between the top of sanitary sewers and the bottom of water mains. The minimum cover for water main of 36 inches may be reduced to 24 inches upon approval by the city engineer to provide for acceptable vertical separation.
B. 
The longest standard length of water pipe shall be installed so that the joints will fall equidistant from any sewer crossing. In some cases where minimum separation cannot be maintained, it may be necessary to encase the water pipe and/or sewer service in pipe or concrete as required by the director of public works. No concrete shall be installed unless specifically directed by the city.
(Ord. 743, 1997)
A. 
All irrigation systems shall be installed with an approved backflow prevention assembly approved by AWWA and the Department of Health.
B. 
Irrigation sprinklers shall be situated so as to not wet any public street or sidewalk.
(Ord. 743, 1997)
A. 
All surveying and staking for main extensions shall be performed by an engineering or surveying firm capable of performing such work. The engineer or surveyor directing such work shall be licensed as a professional engineer or professional land surveyor by the state of Washington.
B. 
A pre-construction meeting shall be held with the city prior to commencing staking. All construction staking shall be inspected by the city prior to construction.
C. 
The minimum staking of waterlines shall be as directed by the city engineer or as follows:
1. 
Stake centerline alignment every 50 feet with cut or fill to invert of pipe maintaining 36 inches of cover over pipe. Cuts are normally not required when road grade has been built to subgrade elevation.
2. 
Stake alignment of all fire hydrants, tees, water meters, setters and other fixtures and mark cut or fill to hydrant flange finished grade.
(Ord. 743, 1997)
A. 
Clearing and grubbing where required shall be performed within the easement or public right-of-way as permitted by the city and/or governing agencies. Debris resulting from the clearing and grubbing shall be disposed of by the owner or contractor in accordance with the terms of all applicable permits.
B. 
Trenches shall be excavated to the line and depth designated by the approved plans to provide a minimum of 36 inches of cover over the pipe. Except for unusual circumstances where approved by the city, the trench sides shall be excavated vertically and the trench width shall be excavated only to such widths as are necessary for adequate working space as allowed by the governing agency. The trench shall be kept free from water. Surface water shall be diverted so as not to enter the trench. The contractor shall maintain sufficient pumping equipment on the job to ensure that these provisions are carried out.
C. 
The contractor shall perform all excavation of every description and whatever substance encountered and boulders, rocks, roots and other obstructions shall be entirely removed or cut out to the width of the trench and to a depth six inches below water main grade. Where materials are removed from below water main grade, the trench shall be backfilled to grade with material satisfactory to the city and thoroughly compacted.
D. 
Trenching and shoring operations shall not proceed more than 300 feet in advance of pipe laying without approval of the city, and shall be in conformance with Washington Industrial Safety and Health Administration (WISHA) and Office of Safety and Health Administration (OSHA) safety standards.
E. 
The bottom of the trench shall be finished to grade with hand tools in such a manner that the pipe will have bearing along the entire length of the barrel. The bell holes shall be excavated with hand tools to sufficient size to make up the joint.
(Ord. 743, 1997)
A. 
Location of thrust blocking shall be shown on plans. Thrust block concrete shall be Class B poured against undisturbed earth. A plastic barrier shall be placed between all thrust blocks and fittings.
B. 
See standard drawings for thrust block locations and calculations.
(Ord. 743, 1997)
Backfilling and surface restoration shall closely follow installation of pipe so that not more than 300 feet is left exposed during construction hours without approval of the city. Selected backfill material shall be placed and compacted around and under the water mains by hand tools to a height of six inches above the top of the water main. The remaining backfill shall be compacted to 95 percent of the maximum density in traveled areas, 90 percent outside traveled area. Where governmental agencies other than the city have jurisdiction over roadways, the backfill and compaction shall be done to the satisfaction of the agency having jurisdiction. Native material may be used for backfill only upon the approval of the director of public works. If suitable backfill material, as determined by the director of public works, is not available from trenching operations, the city may order the placing of bedding conforming to Section 9, 30.7A of the Standard Specifications around the water main and gravel base conforming with Section 9, 30.7(3) of the Standard Specifications for backfilling the trench.
A. 
Prior to the acceptance of the work, the installation shall be subjected to a hydrostatic pressure test of two and one-half times the static pressure or 250 psi minimum, for 15 minutes. Any drop in pressure must be within the allowable limits set by the State of Washington Department of Health. Any leaks or imperfections developing under said pressure shall be remedied by the contractor. No main shall be hydrostatically tested until the lines are flushed. The main shall be tested between valves. Insofar as possible, no hydrostatic pressure shall be placed against the opposite side of the valve being tested. Test pressure shall be maintained while the entire installation is inspected.
B. 
The contractor shall provide all necessary equipment and shall perform all work connected with the tests. Tests shall be made after all connections have been made and the roadway section is constructed to subgrade. This is to include any and all connections and hydrants as shown on the plan. The contractor shall perform the test to assure that the equipment to be used for the test is adequate and in good operating condition and the air in the line has been released before requesting the city to witness the test.
C. 
Testing against existing valves shall not be allowed.
D. 
See Section 15.01.355 for testing responsibilities for backflow prevention devices.
(Ord. 743, 1997)
A. 
Sterilization of water mains shall be accomplished by the contractor in accordance with the requirements of the Washington State Department of Health and in a manner satisfactory to the city. At no time shall chlorinated water from a new main be flushed into a body of fresh water. This is to include lakes, rivers, streams, drainage ways, and any and all other waters where fish or other natural water life can be expected.
B. 
When a chlorine concentration has been established throughout the line, the valves shall be closed and the line left undisturbed for 24 hours. The line shall then be thoroughly flushed and water samples taken by the city at least 24 hours after flushing and disinfecting. Should the initial treatment result in an unsatisfactory bacteriological test, the original chlorination procedure shall be repeated by the contractor until satisfactory results are obtained. Testing and sampling shall take place after all underground utilities are installed and compaction of the roadway section is complete. The developer shall be responsible for all testing and testing costs.
(Ord. 743, 1997)
A. 
All subdivisions/developments/buildings served by the city's water systems shall be required to provide for fire flow as hereinafter specified. Nothing herein shall be construed to preclude the imposition of fire flow requirements for water systems, where such consideration is found to be necessary by the fire chief to mitigate fire hazards.
B. 
When the subdivision/development/building is determined by the land use coordinator to be commercial in nature, fire flow requirements for the servicing water system will be set by the building official consistent with provisions hereinafter.
C. 
All modification or extension of the existing system, and those developments of a commercial nature, shall provide fire flow as stated below. In the case of existing systems, incremental improvements toward complete compliance may be stipulated, reflecting the concurrence of the Health Department, the engineer, and the fire chief. The "Insurance Service Office Guide for Determining Fire Flow" may be used in setting the fire flow requirement, but the minimum requirement for new development shall be as follows:
1. 
Fire Flow Requirements. The following minimum fire flow requirements are hereby imposed:
a. 
Residential units: 500 gallons per minute for 30 minutes.
b. 
Commercial units: 1,000 gallons per minute for 60 minutes. Higher flow requirements may be required after evaluation by the fire chief.
c. 
The water system providing the above fire flows to commercial/multifamily class buildings shall do so with a minimum residual pressure of 20 pounds per square inch.
2. 
Fire Hydrants. Fire hydrants shall be provided in accordance with WAC 248-57-600.
3. 
Hydrant Spacing.
a. 
Residential: 600 feet maximum, except that additional hydrants may be required by the fire chief to permit all dwellings to be reached by hose lays of no greater than 500 feet.
b. 
Commercial/industrial/multifamily: as determined by the fire chief, but not to exceed 300 feet maximum.
c. 
Where geographically or otherwise physically possible, the spacing intervals for hydrants shall commence at street intersections.
d. 
Hydrant spacing shall be measured along the improved portion of the roadway.
D. 
1. 
For requirement regarding use, size and location of a fire department connection (FDC) and/or post indicator valve, contact the Langley building department. Location of FDC shall be shown on water plans.
2. 
The property owner installing a fire sprinkler line to a building shall be responsible for maintenance of the fire line, for the life of the project, from the building to the water main, including the appurtenances utilized in the connection to the water main.
E. 
Where needed, the department of public works or Langley fire department may require hydrants to be protected by two or more posts, each four inches in diameter by five feet in length made of either reinforced concrete or steel.
(Ord. 743, 1997)