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Storm Sewage Systems

Storm Sewage Systems

(Section 02720)

PART 1 GENERAL

1.01 WORK INCLUDED

A. Contractor shall provide all materials, labor, tools, equipment, fees, permits, transportation and other items required to furnish and install storm sewer systems as indicated on the Drawings and as specified herein. All storm sewer Work shall be in accordance with applicable regulations and shall include the following:

B. Storm sewer piping

C. Inlet boxes and cleanout boxes with grates and lids as required.

D. Rip-rap and drainage way protection

1.02 RELATED WORK

A. Section 02220 - Trenching, Backfilling and Compacting

B. Section 03000 - Concrete

1.03 REFERENCES

A. The applicable provisions of the latest editions of the References listed below shall govern the Work covered under this Section, unless there is a conflict between said References and the requirements of this Section. In the case of such conflict, the requirements of this Section shall apply.

B. Concrete Reinforcing Steel Institute (CRSI)

C. American Society for Testing and Materials (ASTM)

D. American National Standards Institute (ANSI)

E. Utah Occupational Safety and Health Division (UOSHD).

F. American Association of State Highway and Transportation Officials (AASHTO)

G. Midvale City Corporation Standard Construction Details

1.04 SUBMITTALS

A. Submit evidence of materials conformance with applicable requirements as well as these specifications.

B. Submittals shall include the following items:

     1. Certification of pipe materials and precast structures conformance with the requirements specified herein. (ASTM C76, AASHTO HS20, etc)

     2. Concrete mix designs and reinforcing drawings for cast-in-place structures.

     3. Sieve analyses and/or certifications of imported bedding and backfill materials to verify conformance with requirements specified herein.

     4. Shop drawings of precast structures, pipe materials, and castings.

1.05 QUALITY ASSURANCE

A. All products shall be inspected by Contractor, prior to installation, for damage. No damaged products will be used.

B. All working conditions shall be in accordance with the "Utah Occupational Safety and Health Division", Safe Practices for Excavation & Trenching Operations, latest edition, or other Laws or Regulations which apply.

C. Salt Lake County requirements shall govern for all work in Salt Lake County road right-of-ways:

     1. All work shall conform to the applicable standards, regulations, and requirements of the Salt Lake County Public Works Department.

     2. Permits shall be obtained and paid for by the Contractor.

     3. License and Permit Bond, without cancellation clause, in an amount and form prescribed by the Salt Lake County Department of Public Works, shall be provided by the Contractor in connection with his excavations in Salt Lake County Right-of-Way.

D. Utah Department of Transportation requirements shall govern for all work in Utah Department of Transportation highway right-of-ways:

     1. All work shall conform to the applicable standards, regulations and requirements of the Utah Department of Transportation, including the Specifications for Excavation on State Highways.

     2. Permits shall be obtained and paid for by the Contractor.

     3. License and Permit Bond, without cancellation clause, in an amount and form prescribed by the Utah Department of Transportation, shall be provided by the Contractor in connection with his excavations on Utah Department of Transportation Right-of-Way.

E. Utah Department of Transportation requirements in Salt Lake County Roads:

     1. Where reference is made to Utah Department of Transportation standards in these Specifications for work in Salt Lake County roads, the work shall conform to the applicable Utah Department of Transportation standards.

F. Extended Warranty Period for work in Salt Lake County and Utah Department of Transportation roadways shall apply.

1.06 DELIVERY AND HANDLING

A. Workmanship and methods employed in the handling, transportation, storage, bedding, and laying of pipe, fittings, associated structures and accessories shall conform to the appropriate manufacturers' recommendations and/or ASTM recommendations.

B. Load and unload pipe, fittings, and accessories in such a manner as to avoid shock or damage.

1.07 PROJECT CONDITIONS

Not Used

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Manufacturers providing materials or equipment as part of this specification shall have a minimum of five (5) years experience in the manufacture, testing, and installation of such materials and equipment.

B. Manufacturers shall provide, upon request, verification of a consistent record of meeting or exceeding materials or performance standards as specified herein.

C. Manufacturers - Subject to compliance with specified requirements, manufacturers offering products that may be incorporated in the Work include, but are not limited to the following:

     1. Storm Sewer Piping

          a. Polyvinyl Chloride (PVC)
               i. J - M Manufacturing Company, Livingston, New Jersey
               ii. Extrusion Technologies, Incorporated, Denver, Colorado
               iii. Pacific Western Extruded Plastics Company, Eugene, Oregon


          b. Ductile Iron (DIP)
               i. Pacific States Cast Iron Pipe Company, Provo, Utah
               ii. United States Pipe and Foundry Company, Birmingham, Alabama

          c. Vitrified Clay (VCP)
               i. Gladding, McBean and Company, Salt Lake City, Utah

          d. Corrugated Metal Pipe (CMP)
               i. Contech Construction Product, Salt Lake City, Utah
               ii. Amcor Precast, Ogden, Utah

          e. Reinforced/Unreinforced Concrete Pipe (RCP and UCP)
               i. W. R. White Company, Ogden, Utah
               ii. Amcor Precast, Ogden, Utah
               iii. Geneva Pipe, Orem, Utah

          f. High Density Polyethylene Pipe (HDPE)
               i. Hancor Inc., Findlay, Ohio
               ii. Plexco/Chevron Chemical Company
               iii. Advanced Drainage Systems, Inc., Washougal, Washington

     2. Storm Sewer Manholes, Catch Basins and Storm Sewer Boxes (Precast)

          a. W. R. White Company, Ogden, Utah

          b. Amcor Precast, Ogden, Utah

          c. Geneva Pipe, Orem, Utah

     3. Storm Sewer Castings

          a. All castings shall be of domestic manufacture.

          b. D & L Supply, Salt Lake City, Utah

          c. W. R. White Company, Ogden, Utah

2.02 STORM SEWER PIPING

A. Unless otherwise indicated, piping materials shall conform to the following minimum requirements.

B. Polyvinyl Chloride (PVC)

     1. PVC pipe materials shall conform to cell class 12454B, 12454C, 12364C, or 13364B as defined by ASTM D1784 - Specification for Rigid Poly(Vinyl Chloride)(PVC) Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) Compounds.

     2. PVC pipe and fittings shall conform to the requirements of ASTM D3034 - Standard Specification for Type PSM Poly(Vinyl Chloride)(PVC) Sewer Pipe and Fittings for pipe sizes 4" to 15".

          a. For pipe sizes 18" to 36",conform to the requirements of ASTM F679 - Standard Specification for Poly(Vinyl Chloride)(PVC) Large- Diameter Plastic Gravity Sewer Pipe and Fittings.

     3. Pipe shall be provided with bell and spigot joints conforming to ASTM D3212 - Standard Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals. Gaskets shall consist of a solid cross section rubber ring, factory assembled, securely locked in place to prevent displacement during assembly.

C. Ductile Iron Pipe (DIP)

     1. Pipe shall be cement mortar lined Class 50 designed and manufactured in accordance with ANSI/AWWA C150/A21.50, C151/A21.51 and C104/A21.4.

     2. Pipe shall generally be bell and spigot type consisting of integral bell section, factory beveled spigot ends, and rubber sealing ring conforming to the requirements of ANSI/AWWA C111/A21.11.

     3. Fittings shall conform to the requirements of ANSI/AWWA C153

D. Vitrified Clay Pipe (VCP)

     1. Vitrified clay pipe shall be push-on joint type, extra strength class conforming to the requirements of ASTM C700 - Standard Specification for Vitrified Clay Pipe, Extra Strength, Standard Strength, and Perforated..

     2. Push on joints and gaskets shall conform to the requirements of ASTM C425 - Standard Specification for Compression Joints for Vitrified Clay Pipe and Fittings.

     3. Fittings shall be vitrified clay, extra strength conforming to the requirements of ASTM C700.

E. Corrugated Metal Pipe (CMP)

     1. Corrugated Metal Pipe materials shall conform to one of the following:
          i. AASHTO M167 - Corrugated Steel Structural Plate, Zinc Coated, for Field Bolted Pipe, Pipe-Arches, and Arches
          ii. AASHTO M218 - Steel Sheet, Zinc Coated (Galvanized) for Corrugated Steel Pipe


     2. Pipe shall conform to AASHTO M36/ASTM A760 - Corrugated Steel Pipe, Metallic Coated for Sewers and Drains

     3. Pipe shall be of the thickness and diameters indicated, or as required to accommodate anticipated depths of bury.

F. Reinforced Concrete Pipe (RCP) (12" Diameter and Larger)

     1. Reinforced Concrete Pipe (RCP) shall meet the requirements of ASTM C76 - Standard Specification for Reinforced Concrete Culvert, Storm Drain and Sewer Pipe, Class III.

     2. Push-on gasket joints shall conform to ASTM C443 - Standard Specification for Joints for Circular Concrete Sewer and Culvert Pipe, Using Rubber Gaskets.

     3. Cement for the pipe shall be Portland Cement Type V, conforming to ASTM C150.

G. Unreinforced Concrete Pipe (UCP) (Less than 12" Diameter)

     1. Concrete pipe shall meet the requirements of ASTM C14 - Standard Specification for Concrete Sewer, Storm Drain, and Culvert Pipe, Class III.

     2. Push-on gasket joints shall conform to ASTM C443.

     3. Cement for the pipe shall be Portland Cement, Type V, complying to ASTM C150.

H. High Density Polyethylene Pipe (HDPE)

     1. HDPE pipe materials shall conform to ASTM D1248, Type III, Class C, Category 4 or 5, Grade P33 or P34, or ASTM D3350 Cell Classification 324420C or 345434C.

     2. Pipe and fittings shall conform to the requirements of ASTM D3350 - Standard Specifications for Polyethylene Plastic Pipe and Fittings.

     3. Pipe shall be provided with bell and spigot joints conforming to AASHTO M294 - Specification for Corrugated Polyethylene Drainage Pipe, 12 to 36 Inch Diameter. Gaskets shall be factory installed in the bell by the manufacturer.

2.03 STORM SEWER MANHOLES

A. Manholes shall be either cast in place or precast units of the size, depth and configuration indicated on the drawings.

B. Precast concrete manhole sections shall be designed and manufactured in accordance with the requirements of ASTM C478 - Standard Specification for Precast Concrete Manhole Sections.
 

C. Manhole rings and flat top sections shall be designed and manufactured in accordance with the requirements of ASTM C478 and AASHTO HS-20 loading.

D. Manholes shall be of watertight construction, utilizing either bitumastic sealant or rubber gasket between adjacent manhole sections.

E. Cement for manholes shall be Portland Cement, Type V, or Type II-A complying with ASTM C150.

F. All required openings in manhole sections shall be preformed during the casting process at proper locations required for indicated installation. Each opening shall be provided with a watertight rubber boot equipped with stainless steel bands to secure boot to both manhole and pipe connection.

G. Manhole ring and cover shall be manufactured of grey iron castings conforming to ASTM A48, Class 30, with non rocking, machined bearing surfaces between cover and frame.

     1. Cover shall be vented and shall bear the lettering "STORM SEWER".

     2. Ring and cover shall weigh not less than 350 pounds.

H. Manhole steps, if required, shall be cast in place units consisting of steel rebar construction covered with polyvinyl material and specifically manufactured for use in manhole installation.

2.02 INLET AND CLEANOUT BOX MATERIALS

A. Concrete, forms and reinforcement: Shall be as specified in Section 03300, 03100 and 03200, respectively.

B. Rings, Lids and Grates shall be as specified on the Drawings.

2.03 RIP-RAP

A. Rip-rap shall be as specified on the Drawings.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify installation or connection requirements prior to construction by potholing as necessary.

B. Verify that Work covered under other sections of these specifications is complete to the point that Work covered under this section may properly commence without hindering or damaging Work of other trades. Do not proceed with construction until unsatisfactory conditions have been corrected.

3.02 METHODS AND PROCEDURES

A. Install materials and equipment included in the Work in accordance with materials/equipment manufacturer's recommended methods and procedures.

B. All working conditions shall be in accordance with the "Utah Occupational Safety and Health Division", Safe Practices for Excavation & Trenching Operations, latest edition, or other Laws or Regulations which apply.

3.03 INSTALLATION

A. General

     1. Install storm sewer piping to the lines, grades, and elevations indicated on the drawings. Install connections at the locations indicated or as otherwise required to provide storm drainage connections to existing roof drains or other storm drainage improvements.

B. Bedding:

     1. Bedding shall be prepared in accordance with Section 02220 of these specifications and as indicated on the drawings.

     2. Overexcavate as necessary and install approved material to provide firm, stable foundation for sewer piping installation. Overexcavation shall be approved by Engineer.

     3. Prepare bedding to insure trench bottom is free of large stones, debris, frozen, organic or other deleterious materials.

     4. Excavate to pipe bells to insure pipe is supported properly along its entire length.

C. Pipe Laying Procedures

     1. Dewater trench as necessary to prevent the accumulation of groundwater or other unacceptable water in trench.

     2. Pipe laying operations shall proceed in a uphill direction with all bell facing uphill unless otherwise specifically approved by Engineer.

     3. Contractor shall follow pipe manufacturer's recommended practice for lowering, assembling, and installing storm sewer pipe.

     4. During pipe installation, verify that no foreign material is inside pipe. Clean interior of each pipe joint prior to installation.

     5. Storm sewer pipe shall be laid to uniform line and grade between manholes or drainage structures unless otherwise approved by the Engineer.

     6. Plug open end of installed storm sewer piping and close trench at the end of each day's work. Open trenches may not be left overnight without specific permission from the Engineer.

D. Water main crossing requirements:

     1. Maintain 18" vertical separation wherever possible.

     2. Storm sewers shall be installed beneath water mains wherever possible.

     3. If vertical separation or installation beneath water main requirement can not be met, advise Engineer of vertical separation less than 18" and receive approval of corrective measures prior to proceeding with storm sewer installation.

E. Horizontal separation requirements.

     1. Maintain a minimum 10' horizontal separation between storm sewer and existing water mains wherever possible.

     2. Advise Engineer of horizontal separation less that 10' and receive approval of corrective measures prior to proceeding with storm sewer installation.

F. Backfilling

     1. Install backfill and compact in accordance with manufacturer's requirements and as indicated on the drawings. Backfill shall not be placed in lifts greater than can be properly compacted to the required density.

     2. Backfill material shall be free of large rocks, organic or frozen material.

G. Manholes

     1. Excavation, bedding and backfill for manhole installation shall be in accordance with Section 02220 of these specifications and as indicated on the drawings.

     2. Install manholes at locations and to grades indicated on the drawings.

          a. Installation shall be in accordance with ASTM C891 - Standard Practice for Installation of Underground Precast Concrete Utility Structures.

     3. Set manhole lid flush with finished surface unless otherwise noted on the drawings.
 

     4. Cast-in-place base and floor shall conform with requirements of standard details for layout and configuration.

     5. All lifting holes shall be grouted watertight.

     6. Prevent debris from entering installed storm sewer piping via manholes by providing suitable barriers or covers.

     7. Pipe transition into manhole must be smooth and free of any pockets or indentations. Any such inconsistencies shall be filled with non-shrink grout to form a smooth surface.

H. Cast-In-Place Structures

     1. Shall conform to the requirements of Section 03000 - Concrete.

I. Rip Rap

     1. Place rip-rap in location as shown on the Drawings. Rocks shall be placed in such a manner as to assure tight interlocking; no loose piles will be allowed.

     2. Required depths indicated are for hand-placed rip rap. Increase depths by 25% for "dumped" placement.

3.04 PROTECTION

A. Provide barricades and restrict access as appropriate to prevent damage to Work in place.

B. Contractor shall be responsible for protection of Work in place against displacement, damage, loss or theft until Owner's acceptance. Any Work installed and subsequently damaged, lost, or displaced shall be repaired or replaced to the Owner's satisfaction at no additional cost.

3.05 CLEANING

A. Thoroughly clean all pipe lengths or units of all debris immediately after laying.

B. Thoroughly clean by flushing and remove all debris from storm sewer pipe and manholes. Inspect and clean all lines as specified herein. Storm sewerage facilities shall be thoroughly cleaned prior to turning over to the Owner.

3.06 TESTING

A. Contractor shall provide all materials, equipment, and labor to perform testing of installed storm sewer piping, structures, and manholes as required for acceptance by Engineer.

B. Engineer shall be notified no less than two full working days prior to any proposed testing.

C. Testing of storm sewer shall consist of the following.

     1. Engineer, Owner or their representative shall visually inspect each run of piping by lamping to verify consistent line and grade.

     2. Mandrel testing (flexible pipe)

          a. Mandrel (deflection testing) shall be conducted no sooner than 30 days after pipe is backfilled.

          b. Mandrel shall be manufactured to provide proofing ring and minimum 9-point bearing with an outside diameter of 95% of the average inside diameter of line to be tested. Contractor shall provide certifications that mandrel meets these requirements prior to testing.

          c. Mandrel shall be pulled by hand in the presence of the Engineer and shall pass freely through the line being tested.

          d. In the event the mandrel cannot pass freely through the line, pipe shall be excavated, rebedded and backfilled to reduce pipe deflection below 5%. All costs for excavation, rebedding, and repair of deflected pipe shall be borne by Contractor.

          e. Contractor shall reperform mandrel test and make repairs until acceptable deflection results.