CITY OF VIRGINIA BEACH PUBLIC UTILITIES AMENDMENTS TO THE HRPDC REGIONAL CONSTRUCTION STANDARDS, 5 TH EDITION. July 29, 2015 Name Action Modification

Transcription

1 CITY OF VIRGINIA BEACH PUBLIC UTILITIES AMENDMENTS TO THE HRPDC REGIONAL CONSTRUCTION STANDARDS, 5 TH EDITION Division 1 All subsections July 29, 2015 General Provisions A.8.a Corrosion Resistance Linings A.8.b Corrosion Resistance Linings Division 1 in its entirety. a in its entirety Replace Replace first paragraph with: E.3 Valves 3. Butterfly Valves b. Ductile iron pipe and fittings shall be lined with Protecto-401 ceramic epoxy coating, or Ownerapproved equal A.7.a Corrosion Resistant Linings A.7.b Corrosion Resistant Linings B Polyvinyl Chloride (PVC) Non- Pressure Pipe C Polyvinyl Chloride (PVC) Pressure Pipe Water Distribution Systems a. Butterfly valves shall not be used in the sanitary sewer force main systems. a. a in its entirety Replace Replace the first paragraph with: b. Where corrosion resistant linings are identified in the Contract Documents for ductile iron pipe and fittings, linings shall be Protecto 401 ceramic epoxy, or Owner-approved equal. : 8. PVC pipe for gravity sanitary sewer applications shall be green. : 5. PVC pipe for gravity sanitary sewer applications shall be green. WATER DISTRUBUTION SYSTEMS All Water Distribution valves and appurtenances shall conform to requirements of AWWA C800 with the exception that any brass part of a fitting or coupling or valve in contact with potable water shall be made of copper alloy CDA No. C89520 or a no-lead brass complying with ASTM B30 and B584. This no-lead brass alloy shall contain no more than one-fourth of one-percent (0.25% or less) total lead content by weight.

2 An ANSI accredited test lab per ANSI/NSF 61, Drinking Water Components-Health Effects 8, shall be used to certify the lead content for all no-lead brass fittings and valves. Proof of certification is required A.3 Ductile-Iron (DI) Pipe All brass fittings and couplings and valves shall have the manufacturers name or trademark integrally stamped or cast onto the fitting. Another marking identifying the item as a no-lead brass alloy shall be cast or stamped as well. 3. DI pipe shall be Class 52 with a minimum pressure classification indicated in the Contract Documents.. Thickness design shall meet requirements of ANSI/AWWA C150/A For burial depths exceeding those allowed by the class, pipe and fittings of sufficient wall thickness shall be provided. The manufacturer s mark, country where cast, year the pipe was produced, and the letters DI or Ductile Iron shall be cast or stamped on the pipe F.1 Valves 1. Gate Valves a. Non-rising stem (NRS) gate valves 3-inches and larger shall meet requirements of ANSI/AWWA C509. Valves shall be rated for at least 200 psi working pressure in sizes 3- through-12-inches and for at least 150 psi working pressure in sizes larger than 12- inches or pressure rating specified for adjacent piping, whichever is greater. Reduced wall valves shall meet requirements of ANSI/AWWA C515. Valve ends shall be compatible with piping systems in which valves are installed and restraint system to be used. Valves shall have O-ring seals. Valves to be used in the water system shall open clockwise. b. Tapping Valves shall meet requirements of gate valves specified above except that seat opening shall be larger than nominal size and valve outlet and shall have mechanical joint F.2 Ball Valves 2. Ball Valves

3 F.3 Butterfly Valves a. Shall be bronze with stainless steel handles as manufactured by McDonald Corp., American Valve, Swagelok, or Owner-approved equal. 3. Butterfly Valves a. Shall be used on water main piping 16-inches in diameter and larger unless otherwise specified. Butterfly valves shall meet requirements of ANSI/AWWA C504. Valves shall be for the pressure class 150B. Wafertype valves shall not be used underground. Valve bodies shall be constructed of close grain, high tensile strength ductile iron and coated inside and out with standard bitumastic coating for water main. Valve body ends shall conform to the requirements of connecting pipe and restraint system to be used. The shaft shall have a minimum diameter specified for the size and class and restraint system to be used. The shaft shall have a minimum diameter specified for the size and class valve in table 3 of AWWA C504. Discs shall be constructed of corrosion resistant alloy cast iron. Seats shall be natural or approved synthetic rubber of the molded-type, secured for complete immobility under all operating conditions. Shaft bearing shall be selflubricating sleeve type. Valves larger than 20- inch diameter shall have an adjustable twoway thrust bearing to keep the valve disc centered regardless of the valve position. Valves shall be Mueller Corporation Lineseal 111 and XP, Lineseal 150 A and B, 200B and 250, Val-Matic rubber seated, M&H Valve Company (Kennedy), Pratt or Ownerapproved equal. b. Valve operators shall be side-mounted and meet requirements of ANSI/AWWA C504, pressure class 150B and be capable of seating and unseating the discs against the full design pressure and velocity and unless otherwise noted and open clockwise. Exterior valves for buried service shall have buried service gear actuated, permanently lubricated operators

4 with 2-inch nut and open clockwise. Valve operators shall be suitable for a minimum of 10,000 cycles of operation at its rated torque. Valve operators shall be designed such that a maximum torque of 80 foot/pounds is required on the operator to develop the seating and unseating torques of the valve. Valve operators shall be sized based on valve diameter as indicated on the Project Drawings, materials specified above, and the following system characteristics. c. Maximum non-shock shutoff pressure across the valve of 150 psi. Velocity through valve under normal conditions of 4 fps. Velocity through valve under extreme maximum flow condition of 16 fps. The system can be assumed to have a constant head source. d. Written certification of compliance with ANSI/AWWA C504, pressure class 150B, for each size valve and operator shall be required prior to installation. In addition, state the maximum operating torque, as defined the appendix of AWWA C504, to which each size valve and its operator will be subjected based upon the above information and the torque output rating of each of the above operators G Valve Boxes G. Valve Boxes Valve boxes shall be as indicated on the contract documents or CVB Public Utilities Standard Details H.6 Fire Hydrants I.1 Air Vent Blow Off Assemblies 6. Fire Hydrants shall be Kennedy Model K81- A, Clow Corporation Medallion, American Darling MK 73-1, or Mueller Company Super Centurion Air Vent and Blow Off Assemblies a. Air Vent and Blow Off Assemblies shall be as indicated on the contract documents or CVB Public Utilities Standard Details. b. Castings for Air Vent Blow Off assemblies

5 I.3 Corporation Stops shall be Capitol Foundry Model #VB-1200 or Owner-approved equal. Frame and cover shall weigh at least 140 pounds. 3. Corporation Stops I.4 Service Saddle a. Corporation stops shall be Mueller type H , McDonald 4701, Cambridge 302 or Owner-approved equal. 4. Service Saddle a. For 1-1/2 inch services, use double strap tapping saddles (such as Ford 202, McDonald 3825, Mueller H105 or Cambridge 810 or approved equal) with 1-1/2 inch corporation stop, 1-1/2 inch Type K copper service line and a flanged meter valve (McDonald B, Mueller B or Cambridge 210- H6MF6 or Owner-approved equal) with flanged tailpiece for meter connection. b. For 2 inch services, use double strap tapping saddles (such as Ford 202, McDonald 3825, Mueller H105 or Cambridge 810 or Ownerapproved equal) with 2 inch corporation stop, 2 inch Type K copper service line and a flanged meter valve (McDonald 4602-B, Mueller B or Cambridge 210-H7MF7 or Owner-approved equal) with flanged tailpiece for meter connection J.3 Water Meters K.2.b Mechanical Joints 3. Meter boxes shall be Capitol Foundry Model MBX-1 heavy duty for 12-inch depth and MBX- 2 heavy duty for 18-inch depth. b. Mechanical Joints M Sleeves and Couplings : Shall meet requirements of ANSI/AWWA C111/A21.11 and be on the CVB Public Utilities Approved Products list. 7. Service couplings or unions shall be included on

6 the CVB Public Utilities Approved Products list. 301 III.D Measurement 302 III.R Measurement D. Temporary and/or Tree Protection Fencing installed completely in place. Measurement of temporary and/or tree protection fencing installed shall be incidental to the Contract unit price for clearing and grubbing. Replace Replace R with: R. Storm Sewer Conflict Manhole, installed complete in place. Measurement will be based upon the vertical linear footage, from the invert at the center of the sewer manhole to the bottom of the manhole casting, of each conflict manhole installed. Payment will include the cost of the following: 1. Removing and disposing of existing structures (for replacement structures/manholes only) 2. Excavating 3. Coarse aggregate fill 4. Backfilling with suitable material 5. Compacting 6. Temporary sheeting and bracing 7. Dewatering 8. Interior and exterior applied coatings 9. Benches 10. Walls 11. Inverts 12. Disposing of surplus or unsuitable material 13. Testing 14. Connection of existing storm drain lines to the conflict structure 15. Openings and seals 16. Final surface grading 17. Manhole Frame and Cover 18. Bedding 19. Saw cutting, removing and disposing of existing pavement 20. Temporary and permanent pavement patching.

7 303 II.2.2.A.1 Existing Utilities 303 III.A.6 Measurement 303 III.C.4 Measurement 303 III.C.6 Measurement 303 III.C.6 Measurement 303 III.C Measurement 303 III.D Measurement 309 III.C Measurement 310 III.C Measurement 313 III.B Measurement 317 III.B Measurement Replace Replace " " with " ". 6. Undercut excavation Undercut excavation shall be incidental to the Contract unit price for Pipe Bedding. in its entirety. Replace Replace "Standard Detail EW-03" with "the trench detail as shown on the construction drawings. Replace Replace "Standard Detail EW-02 and Standard Detail EW-03" with "the trench detail shown on the construction drawings. : 7. itional pipe bedding, if required and authorized by the inspector, will be measured in 6-inch lifts for the full width of the trench by linear feet as indicated on the Bid Form. The unit price will include the cost of the following: a. Furnishing and installing the bedding b. itional excavation c. Dewatering d. Temporary sheeting and bracing e. Removal and disposal of unsuitable material Replace Replace first paragraph: Erosion and sediment control items will be incidental to other work and will not be measured for separate payment unless line item(s) are included on the Bid Form. Those item(s) will be paid per the individual items identified below and in accordance with the Bid form. Replace 109" replace with Supplemental Replace 109" replace with Supplemental Replace " replace with Supplemental Replace Replace B. with: B. The width of the patching or restoration will

8 406 III.D Measurement 414 III.C Measurement 501 III.C Measurement 502 III.E Measurement 502 III.R Measurement not be measured, but shall be the maximum permissible trench width plus two feet as indicated on the trench detail shown on the construction drawings. It shall be the responsibility of the Contractor to minimize the width disturbed or removed. Replace 109" replace with Supplemental Replace " replace with Supplemental Replace " replace with Supplemental Concrete driveway and entrances installed or replaced will be 7-inches in thickness and will be paid for in units of square yards, or as indicated on the Bid form. Payment will include the cost of saw cutting, removing and disposing of existing concrete driveway, and installation of new concrete. Replace " replace with Supplemental 510 III.A Measurement : 9. Dewatering 10. Temporary and Permanent Pavement patching 11. Furnishing all materials, labor, tools, equipment and incidentals necessary to complete the work as shown on the Plans. 512 II.2.1.Q 5th paragraph Replace Replace " 109.II" with " III Measurement 513 I.1.1 Description of Work : III. MEASUREMENT FOR PAYMENT Traffic control items will be incidental to other work and will not be measured for separate payment unless line item(s) are included on the Bid Form. Those item(s) will be paid per the individual items identified below and in accordance with the Bid form. : Contractor shall furnish all materials and labor for the

9 staging area. The staging area shall have the appropriate erosion and sediment control including but not limited to construction entrance and silt fence. Chain link fence at 8-feet in height shall be installed around the perimeter of the staging area. The staging area shall be maintained at all times including cleaning the street and gutter pans by removing any debris, trash, sediment, etc. The Contractor shall take pre-construction photos of the staging area. 530 III.A.5 Measurement Demobilization, site restoration, general cleaning of the project area, removal of traffic control, removal of erosion and sediment control devices, and postconstruction photos will be required upon completion of project. 5. Abandonment of existing pipelines larger than 2- inch diameter will be paid for at the unit price per linear foot for the pipe size abandoned or, per cubic yard of flowable fill as indicated on the Bid form. Payment shall include the cost of the following: a. Excavation b. Dewatering c. Pumping of flowable fill, if specified d. Compaction e. Grouting existing openings at connections to existing manholes to remain f. Disposing of surplus or unsuitable materials 530 III.E Measurement : 3. The abandonment of mainline cleanouts shall be measured and paid as each and shall include excavation, removal, disposal or salvage of castings, placement of flowable fill, backfilling with suitable material, compacting, pavement patching, disposing of surplus or unsuitable material, top soiling, seeding, restoration and cleanup of property and for furnishing all materials, labor, tools, equipment and incidentals necessary to complete the work.

10 530 III.F.1 Measurement 603 III.B Measurement 604 III.B Measurement 801 III.F Measurement Replace Replace 1 with: 1. Abandonment of concrete or masonry manholes, drainage structures, meter/valve vaults and other structures, to include excavating, removal of frame & cover, demolishing, plugging of incoming pipelines and filling with flowable fill or Owner approved material will be measured and paid for each regardless of size or depth " replace with Supplemental " replace with Supplemental : 19. Removal and disposal of existing water main 801 III.I Measurement : 15. Dewatering 801 III.J Measurement 801 III.M Measurement 801 III.N Measurement 801 III.S Measurement : : : : 17. Dewatering 13. Removal and disposal of existing water service line, surplus and unsuitable material 14. Saw cut, remove and dispose of asphalt or concrete 15. Restoration in right-of-way and easements (including pavement patching or pavement restoration) 13. Removal and disposal of existing water service line, surplus and unsuitable material 14. Saw cut, remove and dispose of asphalt or concrete 15. Restoration in right-of-way and easements (including pavement patching or pavement restoration) 19. Connections to existing mains

11 802 III.A.2 Measurement 802 III.A.3 Measurement 802 III.B Measurement Replace Item 2 in its entirety, replace with: 2. Measurement shall be made based on the linear feet of gravity sewer pipe installed at depth ranges in accordance with the Bid form, complete in place, in accordance with the trench detail. Depth shall be determined by the average depth of gravity sewer pipe installed from manhole to manhole. n. Removal of existing sewer main o. Bypass pumping (up to 2 MGD) Replace Items 1 & 2 in its entirety, replace with: 1. Measurement for lateral service connection will be made along the centerline of the pipeline and based upon the linear footage and pipe material. Pipe will be measured from the service cleanout to the centerline of the gravity sewer pipe or manhole. Payment will include the cost of the following: i. Backfilling and compacting, and compaction testing ii. Bedding iii. Dewatering iv. Removal and disposal of existing sewer lateral, surplus and unsuitable material v. Capping and abandonment of existing laterals located within the right-of-way vi. Connection to mainline pipe or manhole vii. Rebuilding bench and invert of connection manhole viii. Excavation ix. Flushing x. Lateral pipe and fittings, excluding sewer lateral cleanout assemblies and mainline wyes xi. Restoration in right-of-way and easements (including temporary and permanent pavement patching or pavement restoration) xii. Stripping and stockpiling topsoil.

12 xiii. xiv. xv. xvi. xvii. xviii. xix. Replacement of topsoil and reseeding. Temporary sheeting and bracing Testing Maintenance, restoration and replacement of utility lines disturbed or otherwise displaced during construction Flow control Hand excavation around existing utilities Tracer wire for PVC laterals Saw cutting, removing and disposing of existing pavement 802 III.C.1 Measurement 2. Measurement for service wyes or tees will be for each wye or tee installed in place. Payment for installation will be incidental to the cost of installation of the service lateral. Replace Item 1 in its entirety, replace with: 1. Sanitary Manholes a. Measurement of sanitary manholes will be made based on the vertical feet of each size manhole installed and satisfactorily tested, measured to the nearest tenth of a foot from the bottom of the frame and cover to the invert out, in accordance with the Bid form. b. Payment will include the cost of the following: i. All appurtenances required for satisfactory operation ii. Excavation, bedding, backfill, and compaction iii. Sheeting and shoring iv. Precast concrete adjustment ring v. Manhole, complete including benches, inverts and troughs vi. Openings and seals vii. Steps, unless otherwise noted viii. Stone bedding ix. Testing x. Removal and disposal of existing manhole structure and mainline cleanouts, surplus and unsuitable material

13 802 III.C.2 Measurement 802 III.C.3 Measurement 802 III.D Measurement Replace xi. Interior and exterior applied coating xii. Connection of sanitary sewer mainlines to the new manhole xiii. Dewatering xiv. Bypass pumping (up to 2 MGD) xv. Saw cutting, removing and disposing of existing pavement xvi. Restoration in right-of-way and easements (including temporary and permanent pavement patching or pavement restoration) Item 2 in its entirety Item 3 in its entirety, replace with: : 2. Inside Drop Connection a. Measurement of inside drop connections will be made for each connection complete and in-place according to size, 4-inch and larger. b. Payment will include the cost of the following: i. Excavating, backfill with suitable material, and compaction ii. All materials for construction of drop connection iii. Removing and disposing any existing drop connections iv. Sheeting and bracing v. Dewatering viii. Testing ix. Disposing of surplus or unsuitable material x. Connection of main sewer lines xi. Manhole, complete including benches, inverts, and troughs xii. Restoration in right-of-way and easements (including temporary and permanent pavement patching or pavement restoration) 10. Dewatering 11. Removal and disposal of existing cleanouts 12. Disposing of surplus of unsuitable material 13. Site restoration and cleanup

14 802 III.F Measurement Replace Replace in its entirety with: F. Connections to existing manholes or structures, complete in place. 802 III Measurement 803 III.J Measurement : Connections to existing manholes or structures will be paid for each connection installed and satisfactorily tested. Payment will include materials, excavation, backfilling, dewatering, testing, core drilling, rubber boot and rubber boot installation, rebuild bench and invert and all other work incidental to the connection to the existing manhole or structure. J. itional Pipe Bedding : 1. Shall be measured in linear feet per 6-inch lift, when directed by the Inspector, for the full width of the trench. 2. Payment shall be at the contract unit price per linear feet and shall include the following: a. itional excavation and bedding in 6- inch lifts. b. Dewatering c. Temporary sheeting and bracing d. Disposing of the unsuitable material which is replaced by the pipe bedding J. Low Pressure Force Main 1. Measurement of Low Pressure Force Main will be made along the centerline of the pipeline and based upon the linear footage of each size pipe installed and satisfactorily tested. 2. Payment will include the cost of the following: a. All appurtenances required for satisfactory operation b. Excavation, bedding, backfill, and compaction c. Dewatering d. Sheeting and shoring

15 810 III Measurement For Payment 811 III.A Measurement For Payment 814 Pipe Rehabilitation by Fold and Form Method 818 III.3.2.D Measurement of Quantities 818 III.3.2.F.15 Measurement of Quantities 822 III.A Measurement 822 III.B Measurement e. Tracer wire f. Flow control g. Restoration in right-of-way and easements (not including curb and gutter restoration or pavement restoration, unless otherwise noted) Replace Replace A & B with: Payment for sewer pipeline and manhole cleaning will be considered incidental and the cost for cleaning shall be included in other bid items, unless otherwise specified on the Bid form. Replace Replace A in its entirety A. Post-Installation Televising of New and Replaced Pipeline and Point Repairs-Payment shall be made at the contract unit price bid per linear foot for pipe cleaned and televised in accordance with the City of Virginia Beach standards. The contractor shall provide post CCTV videos and Hansen Neztek Import CD s for all gravity sanitary sewer mains and service laterals. The Department of Public Utilities will provide the contractor with electronic copies of the project Hansen database file and location map to ensure proper delivery of the Hansen reports to the Department of Public Utilities. 814 in its entirety. Replace Replace section D with: D. Measurement shall be made at the following depth classifications: 0-6, 6-12, 12-16, 16-20, and greater than 20 feet, in accordance with the Bid form. Item 15 (Post-installation video inspection). : 14. Flow control 15. Site restoration Replace Replace B. with: B. Measurement for payment for manhole frame sealing will on a unit price for each internal manhole frame sealed and tested. Payment

16 Standard Details will include the cost of the following: 1. All labor, materials, equipment, tools and incidentals for preparing the internal frame/cone area 2. Sealant application 3. Testing entire : Refer to Construction Plan Details, City of Virginia Beach Public Utilities Standard Details, and City of Virginia Beach Public Works Specification and Standards.