CITY OF BROOKLYN PARK, MINNESOTA STANDARD DETAIL SPECIFICATIONS FOR THE CONSTRUCTION OF WATERMAIN SYSTEMS MARCH, 2009 INDEX

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1 ARTICLE CITY OF BROOKLYN PARK, MINNESOTA STANDARD FOR THE CONSTRUCTION OF WATERMAIN SYSTEMS MARCH, 2009 INDEX PAGE W-1 SCOPE OF WORK... 1 W-2 USE OF EXISTING WATER SYSTEM...1 W-3 SPECIFICATIONS WHICH APPLY...1 W-4 WATERMAIN PIPE MATERIALS, PROCEDURES AND APPURTENANCES...2 W-4.1 DUCTILE IRON PIPE (DIP)...2 W-4.2 POLYVINYL CHLORIDE PRESSURE PIPE (PVC)...5 W-4.3 POLYETHYLENE ENCASEMENT...6 W-4.4 TRACER WIRE FOR PVC WATERMAIN WRAP...6 W-4.5 THRUST RESTRAINT...6 W-4.6 GATE VALVES AND BOXES...7 W-4.7 VALVE BOX ADAPTOR...7 W-4.8 AIR RELIEF VALVES...8 W-4.9 HYDRANTS...8 W-4.10 BUILDING SERVICES...10 W-4.11 CORPORATION STOPS...11 W-4.12 CURB STOPS...11 W-4.13 CURB BOXES...11 W-4.14 INSULATION...12 W-5 TESTING PROCEDURES...12 W-5.1 HYDROSTATIC PRESSURE AND LEAKAGE TEST...12 W-5.2 TESTING ALTERNATIVES AGAINST EXISTING GATE VALVES...13 W-6 DISINFECTION...13 W-7 MEASUREMENT AND PAYMENT...14 W-7.1 DUCTILE IRON PIPE (DIP) AND POLYVINYL CHLORIDE (PVC)...14 W-7.2 DUCTILE IRON PIPE FITTINGS...14 W-7.3 POLYETHYLENE ENCASEMENT...15 W-7.4 HYDRANTS...15 W-7.5 GATE VALVES AND BOXES AND MANHOLES...15 W-7.6 AIR RELIEF VALVE AND MANHOLE...15 W-7.7 COPPER WATER SERVICE...15 W-7.8 CURB STOPS AND BOXES...15 W-7.9 CORPORATION STOPS...15 W-7.10 SERVICE SADDLES...16 W-7.11 SAND-GRAVEL MATERIAL AND COURSE FILTER AGGREGATE.16 W-7.12 RESTORATION...16 W-7.13 JACKING OPERATIONS...16 W-7.14 SHEETING AND BRACING...17 W-7.15 PILING...17 W-7.16 INSULATION...17 W-7.17 MERGED ITEMS...17 Detail Drawings (W-1 thru W-3, W-5, W-6 & W-7 Attached)

2 W-1 SCOPE OF WORK STANDARD FOR WATERMAIN SYSTEMS CITY OF BROOKLYN PARK, MINNESOTA MARCH, 2009 The work to be done under this contract shall include the furnishing of all labor, materials, tools and equipment to construct complete in place the watermain and all appurtenances as shown on the drawings, plans and as specified herein. The Contractor shall excavate all materials encountered, furnish and compact foundations where required, furnish and install all timbering, sheeting and bracing necessary to safely support all work, remove all water, protect, repair, relocate, maintain and restore all sub-surface, surface and overhead structures directly or indirectly disturbed, injured or affected by his operations and provide all backfilling and furnish all other appurtenant items and services as necessary. W-2 USE OF EXISTING WATER SYSTEM The Contractor shall make written arrangements with the Engineer and obtain the necessary permits from the Brooklyn Park Water and Sewer Department before using any municipal water and before disposing of any water or other wastes into the sanitary sewer system. The Contractor shall pay all charges at the current rates for the use of the municipal sewer and water facilities. All costs incurred shall be incidental and there will be no additional compensation. Only City maintenance personnel shall have authority to operate any hydrants or valves which involve the municipal water system. W-3 SPECIFICATIONS WHICH APPLY All specifications contained herein, including attached detail drawings, together with the construction plans for the designated project or projects and including current revisions of those portions of the following specifications, as indicated by paragraph or designation number, shall apply: American Society for Testing Materials (ASTM); American National Standards Institute (ANSI); American Water Works Association (AWWA); Federal Specifications; Minnesota Department of Transportation "Standard Specifications for Construction" 2005 Edition The Contractor shall comply with all local ordinances and codes together with all rules and regulations of the Minnesota Department of Health which may apply to this work. 1

3 W-4 WATERMAIN MATERIALS, PROCEDURES AND APPURTENANCES All watermain pipe, hydrants, valves, fittings and all appurtenances shall be new materials and shall be of the size, strength, and quality as shown on the plans and as specified below and/or as indicated in the special conditions. The Contractor may be required to secure and deliver to the Engineer a written statement from the manufacturer assuring the quality and compliance to the applicable specifications of all materials furnished and installed under this improvement project or projects. This shall in no way relieve the Contractor of any responsibility as to the quality of materials furnished and installed. All watermain pipe and fittings shall be installed with a minimum cover of seven and one-half (7-1/2) feet over pipe crown unless otherwise shown on the plans. W-4.1 DUCTILE IRON PIPE (DIP) A. DUCTILE IRON PIPE Ductile iron pipe shall conform to ANSI A21.51/AWWA C151, Grade Table 4.1, which follows, shows the allowable thickness class and maximum tapping size diameter without using a service saddle. Design factors are: ANSI A21.50 truck loading, E' at 400 psi and bedding angle of 60 degrees. Table 4.1 *Nominal Class Max. Tap Size Thickness Thickness w/o Saddle 6" 0.31" Cl.52 3/4" 8" 0.33" Cl.52 3/4" 10" 0.35" Cl.52 3/4" 12" 0.37" Cl.52 1" 16" 0.37" Cl /4" 18" 0.38" Cl /2" 20" 0.39" Cl /2" 24" 0.41" Cl.51 2" 30" 0.43" Cl.51 2" 36" 0.48" Cl.51 2" *Includes foundry tolerance and.08" corrosion allowance. B. FITTINGS 2

4 Ductile iron fittings shall conform to ANSI A21.53/AWWA C153 Class 350 grade and shall have an epoxy coating conforming to ANSI/AWWA C550. Glands shall be ductile iron. One-bolt epoxy coated Ductile Iron Fittings may be used. All sleeves used shall be long. C. RESTRAINED JOINTS The following restraining devices are approved for ductile iron pipe and fittings: 1) Mechanical joint retainer glands 2) Epoxy coated Mega Lugs as manufactured by EBAA Iron, Inc. or approved equal. 3) 3/4" tie rods with mechanical joint retainer glands. 4) Grip Rings as manufactured by Romac Industries, Inc. or approved equal. 5) Joint restraint system as manufactured by Uniflange Corporation. D. LININGS AND COATINGS Ductile iron pipe shall be lined with cement mortar in accordance with ANSI A21.4/AWWA C104 and coated with a petroleum asphaltic material per ANSI A21.53/AWWA C153. E. JOINTS All ductile iron pipe and fitting joints shall be of a push-on or mechanical type with rubber gasket conforming to ANSI A21.11/AWWA C111. F. ELECTRICAL CONDUCTIVITY TEST The watermain piping system and hydrants shall be tested for electrical continuity and current capacity. The electrical test shall be made after the hydrostatic pressure test and completion of backfilling. The line may be tested in sections of convenient length as approved by the Engineer. Conductive gaskets with built-in contact similar to "Fastite Conductive Gaskets" as manufactured by American Cast Iron Pipe Company or approved copper strip 3

5 conductors welded to the pipe with silicone bronze bolts and nuts shall be used. All connections must be able to sustain transmission of electrical current up to 400 amperes, plus or minus 10%, for 5 minutes. Current flow through the pipe shall be measured continuously on a suitable ammeter and shall remain steady without interruption or excessive fluctuation throughout the 5 minute test period. Insufficient current or intermittent current or arcing, indicated by large fluctuation of the ammeter needle, shall be evidence of defective electrical contact in the pipe line. The cause shall be isolated and corrected. Thereafter, the section in which the defective test occurred shall be retested and corrected as required until the requirements are met. Connections for the test shall be made at hydrants. The hydrants shall be in the open position with the caps on during the test. The cable shall be clamped to the breakoff flange. After the test, the hydrant shall be shut off and a cap loosened to allow hydrant drainage. Tighten cap after drainage. A hoop-on type D.C. ammeter placed on one of the cables leading to the hydrant is a convenient method of measuring current. When using arc welding machines, the current control should be set at the minimum before starting. After starting the machine, advance the control until the current indicated on the ammeter is at the desired test valve. CAUTION: In the case of open circuits at joints or connections, the voltage across the defective joint or connection will be in the order of volts. G. SERVICE SADDLES Service saddles on DIP shall be used whenever the thread size of the connection exceeds the tap sizes as shown in Table 4.1. Service saddles shall be Smith-Blair type #313 or approved equal with double straps, zinc plated. H. WATERMAIN T HEAD BOLTS AND NUTS All T-Head bolts and nuts used in the construction of a ductile iron pipe (DIP) watermain system shall be Birmingham Fastener Manufacturing 3/4"-10 Fluorocarbon Coated T-Head Bolt (Kore-Blue), or approved equal, conforming to ANSI/AWWA C111/A Furthermore the bolts and nuts shall be sprayed with an approved automobile undercoating agent immediately upon installation. W-4.2 POLYVINYL CHLORIDE PRESSURE PIPE (PVC) A. POLYVINYL CHLORIDE PIPE 4

6 Polyvinyl chloride pipe shall conform to AWWA C-900 or AWWA C-909. The pipe shall be pressure class 150 with a DR rating of 18 and conforming to the outside diameter dimensions of cast iron pipe. All materials shall meet the specifications and approval of the Underwriters Laboratories Factory Mutual and the National Sanitation Foundation (NSF) Standard. B. FITTINGS Fittings for polyvinyl chloride pipe shall be the same as the fittings required for ductile iron pipe (reference section W-4.1B). C. RESTRAINED JOINTS The following restraining devices are approved for polyvinyl chloride pipe and fittings: 1) Megalugs as manufactured by EBAA Iron, Inc., or approved equal. 2) Grip ring as manufactured by Romac Industries, Inc., or approved equal. 3) Joint restraint systems as manufactured by Uni-flange Corporation. 4) MJR (restraint) system as manufactured by Tyler Pipe. D. SERVICE SADDLES Service saddles shall be used in conjunction with the installation of corporation stops on all PVC watermain pipe. Service saddle shall be Ford Style FS 303, Smith-Blair 372, or Romac Industries 306, stainless steel. E. WATERMAIN T-HEAD BOLTS AND NUTS All T Head bolts and nuts used in the construction of a PVC watermain system shall be the same as those required for ductile iron pipe (reference section W-4.1H). W-4.3 POLYETHYLENE ENCASEMENT All metal pipe, fittings, valves, and hydrant barrels shall be encased with polyethylene film. 5

7 Polyethylene film shall be the tube type with a nominal thickness of.008 in. (8 mils) meeting the requirements as outlined in ANSI/AWWA C105/A21.5. Two (2) inch wide adhesive tape shall be used to secure the polyethylene film overlaps and ends. W-4.4 TRACER WIRE FOR PVC / HDPE WATERMAIN and HDPE Services Watermain tracer wire shall be No. 12 AWG gauge, single strand plastic coated copper wire and used with the installation of all watermain pipe. The wire shall be placed immediately below the watermain pipe and run continuously between hydrants. Tracer wire is required along watermain services if constructed of HDPE. The tracer wire for the HDPE water services shall be connected to the mainline tracer wire via an approved connector. The tracer wire shall be secured to the curb stop box lid, this can be done utilizing a curb stop box top with an integral screw for attaching the wire to the bottom of the curb box lid. The screw shall also act as a terminal for attaching an alligator clip for locating purposes. It may be necessary to connect the wire to curb boxes if hydrants and gate valve boxes are not conveniently located. The wire shall be wrapped twice around hydrants, and shall be attached to the traffic flange bolt. Tracer wire connectors shall be as approved by the Engineer. When connecting to an existing DIP watermain the tracer wire shall be CAD Welded to the pipe. The CAD weld shall be covered with an approved automotive type undercoating. A continuity test shall only be performed after completion of construction of sanitary sewer, watermain and storm sewer. Costs for furnishing and installing tracer wire and testing shall be considered incidental to the improvement costs. W-4.5 THRUST RESTRAINT Concrete thrust blocks shall not be used for thrust restraint. Watermain and fitting joints shall be tied for a sufficient distance back for each plug, tee, cross or bend to allow soil friction to overcome the thrust. The pipe supplier shall furnish data on the frictional resistance to endwise movement of the pipe embedded in earth. Reference Sections W-4.1C and W-4.2C for types of restraining devices approved for ductile iron pipe and polyvinyl chloride pipe respectively. Contractor shall only submit shop drawings of restrained joints as required in the Special Conditions. Where restrained joints are required and the pipe is in a casing near the fitting to be restrained, the length of pipe in the casing shall not be included in the length of pipe necessary to develop sufficient soil friction to overcome thrust. All hydrants, valves, stubs and extensions, blind flanges, plugs, and all other watermain items retaining water pressures must be tied a minimum distance of one (1) full nominal length of pipe. A torque wrench shall be used when tightening bolts, nuts, etc. 6

8 All costs to furnish and install restraining devices shall be incidental to the improvement/project costs. W-4.6 GATE VALVES AND BOXES All valves shall be RESILIENT SEATED (R/S) GATE VALVES conforming to AWWA C509 standards and installed on line with valve boxes. Epoxy coating shall be applied to all gate valves meeting the requirements of AWWA C550. Valve boxes shall be cast or ductile iron, screw type with 4-1/2 inch shaft and round drop cover with "water" imprinted on the top. Only gate valve boxes and accessories manufactured in the United States shall be used. Stainless steel nuts and bolts shall be used on all gate valves. Valve boxes shall be of sufficient length to provide for adjustment above and below grade of not less than six (6) inches when the pipe is laid to the specified depth. Insert extensions will not be allowed on new construction. On street reconstruction projects insert extensions may be used. Refer to Special Conditions for details for the installation of extensions and payment thereof. Gate Valves (R/S) Up to 4" valves No. 4 round 6" to 8" valves No. 6 round 10" valve No. 8 round W-4.7 VALVE BOX ADAPTORS Valve box adaptors shall be installed on all gate valves. Valve box adaptors as manufactured by Adaptor, Inc. or approved equal shall be used. Payment for the adaptors shall be included in the unit bid price for furnishing and installing gate valves. W-4.8 AIR RELIEF VALVES Air relief valves shall be placed in manholes as shown on detail drawing W-5. The corporation stop shall be Mueller H or approved equal. 7

9 W-4.9 HYDRANTS Hydrants shall be Waterous "Pacer" hydrant model WB-67 traffic flange hydrants or equal conforming to AWWA C502 and the following (see also detail drawing W-3): Hydrants shall have a five (5) inch minimum valve opening; one (1) four and one-half (4-1/2) inch steamer connection with a Minneapolis Standard thread of four (4) to the inch, two (2) two and one half (2-1/2) inch hose connections with a National Standard thread of seven and one-half (7-1/2) to the inch. The hydrant main valve shall be of the compression type and shall open against and close with the pressure. The valve shall be faced with a resilient material which resists damage by rocks and other foreign matter, and shall be so designed that together with the seat, it is removable for repairs and replaceable without digging up the hydrant. "O" ring seals shall be provided to prevent water from reaching operating mechanism. Operating mechanism shall be lubricated through an opening in the operating nut. All moving parts are to be bronze or a non-corrodible metal. The length of hydrants shall be approximately nine and one-half (9-1/2) feet from crown of the connecting pipe to the center of the outlet nozzles. This dimension shall be divided so that there will be seven and one-half (7-1/2) feet from the crown of the connecting pipe to the grade or sidewalk, and approximately 24 inches from the grade or sidewalk line to the center of the outlet nozzles. Each hydrant shall have a break off section capability consisting of a safety stem coupling and safety flange so constructed that, if hit, the stem will not bend and the hydrant barrel will not break. It shall also permit rotation for the upper barrel and/or addition of extension sections. A non-corrodible drain valve shall be provided and arranged so that it will automatically drain the hydrant barrel when the main valve is closed, and prevent any leakage when the main valve is open. The drain valve shall be faced with leather, rubber, neoprene or approved equal material, or have a tapered plug and seat for positive closure. The entire drain mechanism shall be lubricated with waterproof graphite grease. Hydrants shall have satisfactory self-lubricating features for the stem threads. Where the stem (valve rod) or operating nut comes in contact with the packing, it shall be brushed with bronze or non-corrodible metal, and no leakage shall be permitted under the brushed surface. All movable parts within the hydrant shall be bronze or non-corrodible metal. Outlet nipples shall be of bronze or suitable non-corrodible metal securely pinned or locked in and caulked in place. 8

10 Hose caps shall be provided for all outlets and must be securely attached to the barrel with a chain constructed of material not less than one-eighth (1/8) inch in diameter. A rubber washer shall be provided in each cap and set in a groove to prevent its falling out when the cap is removed. The hose cap nut shall be of the same size and shape as the top operating nut. All caps shall be lubricated with waterproof graphite grease. The size and shape of the operating nut shall be the National Standard pentagon nut, measuring 1-1/2 inch from point to flat. Hydrants shall open to the left (counter clockwise) and shall be marked with an arrow to show the direction of opening. The hydrant will be marked with the name of the manufacturer. The hydrant will be painted red above the bury line. All hydrants shall have a 6 inch flanged connection to the hydrant valve which will then have a mechanical joint connection to a 6 inch ductile iron lead from the main. Wherever a hydrant is set in soil that is pervious, drainage shall be provided at the base of the hydrant with coarse gravel or crushed stone mixed with coarse sand, from the bottom of the trench to at least 6" above waste openings in the hydrant and to a distance of 1 foot around the base elbow. Hydrant barrel shall be wrapped with a polyethylene film with a nominal thickness of 0.008in (8 mils) meeting the requirements as outlined in ANSI/AWWA C105/A21.5 Two inch wide adhesive tape shall be used to secure the polyethylene film overlap and ends. Wherever a hydrant is set in clay or other impervious soil, a drainage pit 2 feet in diameter and 3 feet deep shall be excavated below each hydrant base and filled compactly with coarse gravel or crushed stone and coarse sand, under and around the elbow and concrete base to a level of 6 inches above the waste opening. Cover all material placed for drainage with a minimum of two layers of tar paper. No drainage system shall be connected to a sewer. Whenever the hydrants are set in areas in which the ground water is within two feet of the bottom of the hydrant or less, the drain plugs in the hydrant shall be plugged and the pumper nozzle painted blue. Whenever the ground cover exceeds 7-1/2 feet over hydrant leads, hydrant extensions or off setting fittings shall be used. 18 maximum extension without using off set fittings on the hydrant lead. If hydrant extensions are used, a distance of 24" shall be maintained from the existing grade to the center of the nozzles. A heavy duty connecting rod shall be provided when the depth from 9

11 the break-off flange to the top of the hydrant lead exceeds 8-1/2 feet. Offsetting fittings shall be as manufactured by Gradelok or equal. These fittings allow for 6" to 24" horizontal or vertical adjustment. Payment for hydrant extension and offsetting fittings shall be as specified in the detail specification or Special Conditions. The contractor shall install a fiberglass candy cane whip pole and spring on each hydrant. *If hydrant Model WB-67 is not available, the Contractor may substitute with Model WB W-4.10 BUILDING SERVICES Building services shall be constructed as shown on the Detail Drawing. Copper service pipe shall be Type K and shall be one inch (1) diameter unless otherwise specified (2" copper service pipe will not be allowed to be used for building services). HDPE water service pipe may be used in lieu of copper service pipe and shall be ENDOT ENDOPURE PE3408 SIDR-7 (I.P.S.) 200 psi conforming to ASTM D2239 and shall be one inch (1 ) diameter unless otherwise specified. Should the SIDR-7(I.P.S.) not be available then ENDOT ENDOPURE PE SDR -9(C.T.S.) 160 psi conforming to ASTM D2737 and shall be one and a quarter inch (1-1/4 ) diameter. All field taps for corporation stops shall be made while the mainline is under working pressure. A minimum distance of thirty-six (36) inches shall be maintained between corporation taps into the main. No unions, couplings, or joints shall be used between the corporation and the stop box. The project inspector shall view each complete building service installation prior to backfilling and while the service pipe is under working pressure. Copper tubing shall comply with the following: Federal Specification ASTM Specification AWWA Specification WW-T-799 Type K B Type K C Type K The water service lines as placed between the watermains and the curb boxes shall have a minimum of seven and one-half (7-1/2) feet of cover. Service lines must be placed (incidental to the project) beneath any obstruction which would prohibit cover of 7-1/2 feet if the service line was placed on top of the said obstruction. If tunneling or jacking of watermain building services is required, the method used shall be approved by the Engineer. 10

12 All building service locations will be established in the field by the Engineer. Generally these locations will agree with those shown on the plans, however the Contractor shall not install a service until its location is verified by the Engineer. It will be the Contractors responsibility to keep an accurate written record of the location of each service and submit this to the Engineer prior to backfilling. W-4.11 CORPORATION STOPS Corporation stops (ball valves) shall be Mueller B-25000, Ford FB600, A.Y.McDonald 4701B. The sizes of the inlet thread and the size of the copper service coupling shall be: 1" x 1" and, 1-1/2" x 1-1/2" for 1" and 1-1/2" services respectively. Tapping of PVC pipe shall be accomplished by the use of an approved core cutter. Any other tapping method shall be approved by the Engineer. Corporation stops for use with HDPE services shall be Ford B66-444M compression type or approved equal used along with insert stiffeners at the connections in the HDPE Pipe. W-4.12 CURB STOPS Curb stops shall be Mueller H "Mark II Oriseal", Ford B22 series, A.Y.McDonald 6100M or approved equal (no drain). Size shall be 1" x 1" unless otherwise indicated in Special Provisions. Curb stops for use with HDPE service pipe shall be the same make as the above but with a compression fitting and used with an insert stiffener at the connection in the HDPE pipe. W-4.13 CURB BOXES Curb boxes (7-1/2 feet long) shall be Mueller H or Ford EM for the 1" size and Mueller H or Ford EM for the 1-1/2" and 2"sizes or approved equal. The box shall be supplied complete with lid and stationary rod. The stationary rod shall be Mueller and for the 1" and 1-1/2" sizes respectively or approved equal. The curb stops shall be installed on the property line/right-of-way line and left in the off position. It shall be the responsibility of the contractor to plainly and accurately mark the installed curb stop locations with a steel fence post. This steel fence post shall be placed to extend 3' above grade and along the side of the stop box assembly which shall be installed half collapsed. W-4.14 INSULATION 11

13 Insulation board (polystyrene) shall meet the requirements of MnDOT W-5. TESTING PROCEDURES W-5.1 HYDROSTATIC PRESSURE AND LEAKAGE TEST After all utility pipes/mains including storm sewer have been constructed within the project area or within a portion thereof, including fittings, services, valves and hydrants, and also backfilling in accordance with the specifications, all newly laid watermain pipe, and/or any valved section of the watermain including building services, unless otherwise directed by the Engineer, shall be subjected to a hydrostatic pressure and/or leakage test. Each valved section of pipe shall be slowly filled with water and the specified test pressure, measured at the lowest point of elevation, shall be applied by means of a pump connected to the pipe in a satisfactory manner. The pump, pipe connection, gauges and all necessary apparatus shall be furnished by the Contractor. The Engineer shall have the right to check the gauge to determine its accuracy at any time. Before applying the specified test pressure, all air shall be expelled from the pipe. To accomplish this, taps with corporation stops shall be made if necessary at points of highest elevation in the main (incidental). The test pressure shall be brought to 150 psi. Thereafter, the test shall be considered satisfactory if the pressure remains constant for a period of 2 hours. If a constant pressure of 150 psi cannot be maintained after 3 attempts without the use of additional water then a leakage test may be conducted. The test shall be completed on each valved section. The Contractor shall provide means for measuring the quantity of water lost by leakage under the test pressure of 150 psi. Allowable leakage shall be in accordance with ANSI/AWWA AWWA C600. The formula for computing leakage shall be L = SD (P)^1/2 133,200 in which L is the allowable leakage in gallons per hour; S is the length of pipeline tested in feet; D is the nominal diameter of the pipe in inches; and P is the average test pressure during the leakage test in PSI. NOTE: The above formula provides for an allowable leakage of gallons per day per mile per inch of nominal diameter at a pressure of 150 psi. The duration of the leakage test shall be two (2) hours minimum, unless otherwise directed by the Engineer. 12

14 If the test on any section of pipe laid shows leakage per mile of pipe in excess of that specified above the Contractor shall, at his own expense, locate and repair the defective pipes, fittings, valves, hydrants or joints so that leakage is within the specified limits. Any cracked or defective pipes, fittings, valves or hydrants discovered in consequence of the pressure test shall be removed and replaced by the Contractor and the test shall be repeated until satisfactory to the Engineer. There shall be a 24 hour advance notice before testing shall begin. W-5.2 TESTING ALTERNATIVES AGAINST EXISTING GATE VALVES W-6 DISINFECTION 1. Plug and block end of new watermain, test line and tie into existing gate valves. 2. Furnish and install a new gate valve at the Contractors expense between new and existing watermain, which shall remain in place after test has concluded. 3. Test new watermain against existing valves. Unless facilities are available for introduction of either chlorine or heavily chlorinated water directly into the mains on their completion, chlorine disinfectant shall be placed at each joint prior to jointing. The following table indicates the amount of calcium hypochlorite (65% available chlorine) that shall be added to each 20 ft. length of pipe to furnish a solution containing the minimum amount of free chlorine. Pipe Size Calcium Hypochlorite (65% available chlorine) 6" 2/5 oz. 8" 4/5 oz. 12" 1-1/2 oz. 16" 2-4/5 oz. 18" 4-0 oz. 24" 6-1/4 oz. 30" 8-1/4 oz. 36" 15-0 oz. Only fresh disinfectants shall be used and the main filled with water and flushed not later than one week after the disinfectant has been added. The water (containing chlorine) shall be left in the pipe being disinfected, for a minimum of twenty-four (24) hours. 13

15 If facilities are available for the introduction of either chlorine or heavily chlorinated water directly into the mains upon their completion, the Contractor shall follow the disinfection procedures as described in paragraph No and No of Section XII, "Manual of Water Supply Sanitation", of the Minnesota Department of Health. The Contractor shall become thoroughly informed on the requirements of the above mentioned manual and shall maintain a sufficient number of copies of same on the job site. Flushing of mains shall only be accomplished by City personnel after completion of curb and gutter, first lift of bituminous pavement, and after all iron has been raised or as directed by the City s Construction Engineer. W-7. MEASUREMENT AND PAYMENT W-7.1 DUCTILE IRON PIPE (DIP) AND POLYVINYL CHLORIDE (PVC) Payment will be made at the Contract price per lineal foot for each diameter of pipe furnished, which shall include the cost of furnishing the pipe, rubber gaskets, joints, and other materials and of delivering, handling, laying, trenching, backfilling, compacting, testing, disinfection and inspection and all material or work necessary to install the pipe complete in place at the depth specified. The length of pipe for which payment is made shall be the actual overall length measured along the axis of the pipe without regard to intervening valves or specials. All lengths will be measured parallel with the centerline of the pipe as laid in the trench. Lengths of branches will be measured from the centers of connecting pipes to centers of valves or hydrants or end of the last pipe installed. W-7.2 DUCTILE IRON PIPE FITTINGS Ductile fittings including sleeves will be paid for at the AWWAC153 average weights shown on Detail W-7. Polyethylene encasement, coatings, glands gaskets, rods, bolts, or other accessories will be considered incidental to the project. W-7.3 POLYETHYLENE ENCASEMENT The unit bid price for polyethylene encasement shall be per lineal foot to include furnishing and installing the film and shall be compensation in full regardless of the size of the pipe to be protected. W-7.4 HYDRANTS Hydrants will be paid for at the unit price per hydrant installed complete including drainage pit, gate valve and box, and fiberglass candy cane, as shown on the detail drawing. 14

16 Payment for hydrant extensions will be made at the contract unit bid price per lineal foot of hydrant extension installed to include, but not limited to, labor, equipment and all necessary materials. W-7.5 GATE VALVES AND BOXES AND MANHOLES Gate valves and boxes including extensions and manholes will be paid for at the Contract unit price bid for each valve size and box and manhole furnished and installed complete. W-7.6 AIR RELIEF VALVE AND MANHOLE The Contract unit price per air relief valve and manhole shall include the complete manhole, granular fill, corporation stop, gate valve and accessories. W-7.7 COPPER OR HDPE WATER SERVICE Copper or HDPE water service pipe will be paid for at the Contract price per lineal foot, for each diameter of pipe furnished, measured horizontally from the centerline of mainline pipe to the centerline of curb box. Unless otherwise specified in the special conditions per EACH. W-7.8 CURB STOPS AND BOXES Curb stops including boxes and extension will be paid for at the Contract unit price for each size furnished and installed. W-7.9 CORPORATION STOPS Corporation stops will be paid for at the Contract unit price for each size furnished and installed and shall include the tap or connection to the watermain. W-7.10 SERVICE SADDLE Service saddles on ductile iron pipe shall be paid for at the unit bid price for each saddle furnished and installed. Costs for furnishing and installing service saddles on polyvinyl chloride pipe shall be considered incidental to the project/improvement costs and no payment will be made therefore. W-7.11 SAND-GRAVEL MATERIAL AND COARSE FILTER AGGREGATE Payment for sand-gravel and coarse filter aggregate shall be per ton furnished, installed and properly compacted. The unit price bid for these materials shall include the cost of all excavation and compaction required to place these materials and also the cost to dispose of 15

17 any undesirable material so replaced unless otherwise specified in the Special Conditions. W-7.12 RESTORATION Restoration shall be made in accordance with the "Excavation and Restoration Procedures" of these specifications and paid for in accordance with the Special Provisions and/or Bid Proposal. W-7.13 JACKING OPERATIONS Unless otherwise specified, payment for jacking operations shall be as follows: Measurement for payment for furnishing and installing steel casing pipe will be made horizontally from end to end of the casing installed. Payment for the carrier pipe to be threaded through the casing will be made separately at the corresponding mainline or building service unit bid price. The unit bid price for the steel casing pipe shall include all labor, equipment and materials necessary to install the casing pipe complete as specified. If the carrier pipe is jacked, tunneled or augured directly into place without the use of a steel casing pipe, the unit bid price for the pipe so installed shall include all labor, equipment and materials necessary to install the pipe complete as specified. Only carrier pipe approved for jacking, tunneling or auguring shall be used. Depth zones will not be a factor in payment. Measurement for payment will be made horizontally from end to end of the jacked, tunneled or augured pipe installed. The Contractor shall pay all charges for bonds, permits and/or inspection fees required in connection with jacking operations or other special crossing at no additional compensation. W-7.14 SHEETING AND BRACING Measurement for payment shall be based upon units of board feet in place. Payment will be made only for that portion of sheeting or bracing which is ordered to be left in place by the Engineer except that payment will be made for the upper four (4) feet of "Cut-off" section of the sheeting. W-7.15 PILING Pile bents shall be paid for at the Contract unit price for a bent in place with the number of piles specified or shown on the detail drawings assuming piles to be 20 feet long and shall be complete with caps, cradles and accessories required. The caps and cradles shall be included 16

18 as part of the 20 ft. minimum length. Any piling required over 20 ft. in length shall be paid for as excess length of piling and shall be paid for at the Contract unit price per lineal foot driven in place over 20 ft. Payment will not be made for piling above the cut-off line for piling over 20 feet long. Unless otherwise specified, there will be no additional compensation for piling delivered. W-7.16 INSULATION Payment for insulation board (polystyrene) shall be paid for at the contract unit price per square foot to furnish and install insulation board. Thickness of the board shall be as specified in the Special Conditions. W-7.17 MERGED ITEMS The cost of all materials and labor required to complete this project as specified and shown on the plans, but not specifically included as a pay item, shall be merged with the various unit prices. 17

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