33 31 11 - Public Sanitary Sewerage Gravity Piping.pdf
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- West Pump Station Replacement Project
- Solicitation number
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- Issued by
- Chester County, Pennsylvania
About this file
This is a technical specification document for public sanitary sewerage gravity piping prepared by Herbert, Rowland & Grubic, Inc. for the Northwestern Chester County Municipal Authority's West Pump Station Replacement Project in Pennsylvania. The specification details the materials, installation standards, and quality assurance requirements for sanitary sewer piping systems, including ductile-iron pipe with ceramic epoxy lining, PVC plastic pipe (ASTM D3034, SDR-26) with bell-and-spigot connections, flexible couplings, and manhole installations. The work encompasses bedding and cover materials meeting AASHTO No. 8 standards, concrete encasement with 4,000 psi strength, and comprehensive field quality control including pressure testing, deflection testing, and compaction testing. Installation must comply with ASTM D2321 standards, with piping laid to specified slope gradients beginning at the downstream end and progressing upstream, with maximum slope variation tolerances of 1/8 inch in 10 feet. The specification requires contractor qualifications of minimum three years' documented experience and manufacturer approval, with preinstallation meetings convened at least one week prior to construction commencement and attendance by affected utility companies and local county officials.
The specification mandates strict material storage and handling protocols, including protection from moisture and dust, with materials accepted only in manufacturer's original packaging. Bedding placement must achieve 95 percent maximum density compaction in continuous layers not exceeding 8 inches, with minimum 12-inch compacted thickness at pipe sides and over pipe. Backfilling compliance is required per Section 31 23 23, and all pipe testing frequencies and methodologies are directed by the Engineer. The project involves coordination with the Northwestern Chester County Municipal Authority, with affected utility companies notified at least 72 hours prior to construction. Closeout submittals must document invert elevations, actual pipe locations, connections, manholes, and any unexpected variations to subsoil conditions or discovery of uncharted utilities. No specific pricing information, set-asides, funding sources, or award dates are detailed in this technical specification document.
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33 31 11 – PUBLIC SANITARY SEWERAGE GRAVITY PIPING
Herbert, Rowland & Grubic, Inc. 33 31 11 - 1 000483.0450
SECTION 33 31 11 – PUBLIC SANITARY SEWERAGE GRAVITY PIPING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Sanitary sewerage piping.
2. Bedding and cover materials.
B. Related Requirements:
1. Section 31 05 13 – Soils for Earthwork: Soils for backfill in trenches.
2. Section 31 05 16 – Aggregates for Earthwork: Aggregate for backfill in trenches.
3. Section 31 23 16 – Excavation: Product and execution requirements for excavation and backfill required by this Section.
4. Section 31 23 16.13 – Trenching: Execution requirements for trenching required by this Section.
5. Section 31 23 23 – Fill: Requirements for backfilling as required by this Section.
6. Section 33 05 05.43 – Mandrel Testing: Deflection testing of plastic sewerage piping.
7. Section 33 05 61 – Concrete Manholes: Manholes for sanitary sewerage piping.
8. Section 33 05 97 – Identification and Signage for Utilities: Pipe markers.
1.2 DEFINITIONS
A. ABS: Acrylonitrile butadiene styrene.
B. Bedding: Fill placed under, beside, and directly over pipe, prior to subsequent backfill operations.
C. EPDM: Ethylene-propylene-diene terpolymer.
1.3 REFERENCE STANDARDS
A. American Association of State Highway and Transportation Officials:
1. AASHTO T 180 - Standard Method of Test for Moisture-Density Relations of Soils
Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.
B. American Water Works Association:
1. AWWA C104 - Cement-Mortar Lining for Ductile-Iron Pipe and Fittings.
2. AWWA C105 - Polyethylene Encasement for Ductile-Iron Pipe Systems.
3. AWWA C110 - Ductile-Iron and Gray-Iron Fittings.
4. AWWA C111 - Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings.
5. AWWA C150 - Thickness Design of Ductile-Iron Pipe.
6. AWWA C151 - Ductile-Iron Pipe, Centrifugally Cast.
7. AWWA C153 - Ductile-Iron Compact Fittings.
C. ASTM International:
Herbert, Rowland & Grubic, Inc. 33 31 11 - 2 000483.0450
1. ASTM A74 - Standard Specification for Cast Iron Soil Pipe and Fittings.
2. ASTM A123/.
3. ASTM C14 - Standard Specification for Nonreinforced Concrete Sewer, Storm
Drain, and Culvert Pipe.
4. ASTM C76 - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe.
5. ASTM C443 - Standard Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets.
6. ASTM C564 - Standard Specification for Rubber Gaskets for Cast Iron Soil Pipe and
Fittings.
7. ASTM C923 - Standard Specification for Resilient Connectors Between Reinforced
Concrete Manhole Structures, Pipes, and Laterals.
8. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of
Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3).
9. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3).
10. ASTM D1785 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.
11. ASTM D2235 - Standard Specification for Solvent Cement for Acrylonitrile-
Butadiene-Styrene (ABS) Plastic Pipe and Fittings.
12. ASTM D2321 - Standard Practice for Underground Installation of Thermoplastic
Pipe for Sewers and Other Gravity-Flow Applications.
13. ASTM D2466 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe
Fittings, Schedule 40.
14. ASTM D2564 - Standard Specification for Solvent Cements for Poly(Vinyl Chloride)
(PVC) Plastic Piping Systems.
15. ASTM D2729 - Standard Specification for Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings.
16. ASTM D2751 - Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS)
Sewer Pipe and Fittings.
17. ASTM D2855 - Standard Practice for Making Solvent-Cemented Joints with
Poly(Vinyl Chloride) (PVC) Pipe and Fittings.
18. ASTM D3034 - Standard Specification for Type PSM Poly(Vinyl Chloride) (PVC)
Sewer Pipe and Fittings.
19. ASTM D6938 - Standard Test Method for In-Place Density and Water Content of
Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).
20. ASTM F477 - Standard Specification for Elastomeric Seals (Gaskets) for Joining
Plastic Pipe.
1.4 COORDINATION
A. Section 01 31 13 – Project Coordination: Requirements for coordination.
B. Coordinate Work of this Section with Northwestern Chester County Municipal Authority.
C. Notify affected utility companies at least 72 hours prior to construction.
Herbert, Rowland & Grubic, Inc. 33 31 11 - 3 000483.0450
1.5 PREINSTALLATION MEETINGS
A. Section 01 31 19 – Project Meetings: Requirements for preinstallation meeting.
B. Convene minimum one week prior to commencing Work of this Section.
C. Attendance Roster: Include affected utility companies and appropriate local county officials.
1.6 SUBMITTALS
A. Section 01 33 00 – Submittal Procedures: Requirements for submittals.
B. Product Data: Submit manufacturer catalog cuts and other information indicating proposed materials, accessories, details, and construction information.
C. Permits: Submit building permits as required.
D. Manufacturer's Certificate: Certify that products meet or exceed specified requirements.
E. Test and Evaluation Reports: Submit reports indicating field tests made and results obtained.
F. Manufacturer Instructions:
1. Indicate special procedures required to install specified products.
G. Source Quality-Control Submittals: Indicate results of factory tests and inspections.
H. Field Quality-Control Submittals: Indicate results of Contractor-furnished tests and inspections.
I. Qualifications Statement:
1. Submit qualifications for manufacturer and installer.
1.7 CLOSEOUT SUBMITTALS
A. Section 01 77 00 – Closeout Requirements: Requirements for submittals.
B. Project Record Documents: Record invert elevations and actual locations of pipe runs, connections and manholes.
C. Identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities.
1.8 QUALITY ASSURANCE
A. Perform Work according to Northwestern Chester County Municipal Authority standards.
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1.9 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacturing products specified in this Section with minimum three years' documented experience.
B. Installer: Company specializing in performing Work of this Section with minimum three years' documented experience and approved by manufacturer.
1.10 DELIVERY, STORAGE, AND HANDLING
A. Section 01 61 00 – Product Requirements: Requirements for transporting, handling, storing, and protecting products.
B. Inspection: Accept materials on Site in manufacturer's original packaging and inspect for damage.
C. Storage:
1. Store materials according to manufacturer instructions.
2. Store valves in shipping containers with labeling in place.
D. Protection:
1. Protect materials from moisture and dust by storing in clean, dry location remote from construction operations areas.
2. Block individual and stockpiled pipe lengths to prevent moving.
3. Provide additional protection according to manufacturer instructions.
1.11 EXISTING CONDITIONS
A. Field Measurements:
1. Verify field measurements prior to fabrication.
2. Indicate field measurements on Shop Drawings.
PART 2 - PRODUCTS
2.1 SANITARY SEWERAGE PIPING
A. Ductile-Iron Pipe:
1. Comply with AWWA C151.
2. Minimum Special Thickness Class: 52.
3. End Connections: Bell and spigot.
4. Outside Coating:
a. Type: Asphaltic.
b. Minimum Uniform Thickness: 1 mil.
c. Comply with AWWA C151.
5. Lining:
a. Ceramic Epoxy.
B. Plastic Pipe:
1. Material: PVC.
Herbert, Rowland & Grubic, Inc. 33 31 11 - 5 000483.0450
2. Comply with ASTM D3034, SDR-26.
3. Inside Nominal Diameter: As shown on Drawings.
4. End Connections: Bell-and-spigot style, with rubber-ring-sealed gasket joint.
5. Fittings: PVC.
6. Joints:
a. Elastomeric gaskets.
b. Comply with ASTM F477.
C. Ductile Iron OD Plastic Pipe (Required for sewer segment with gate valve installed)
1. Material: PVC DR-25, pressure class 165 psi, pipe stiffness 129.
2. Comply with AWWA C-900
2.2 MANHOLES
A. As specified in Section 33 05 61 – Concrete Manholes.
2.3 FLEXIBLE COUPLINGS
A. Description:
1. Material: Resilient, chemical-resistant, elastomeric PVC with stainless steel shield.
2. Attachment: Two Series-300 stainless-steel clamps, screws, and housings.
2.4 FLEXIBLE PIPE BOOTS FOR MANHOLE PIPE ENTRANCES
A. Description:
1. Material: EPDM.
2. Comply with ASTM C923.
3. Attachment: Series-300 stainless-steel clamp and hardware.
2.5 CONCRETE ENCASEMENT AND CRADLES
A. Concrete:
1. As specified in Section 03 30 00 – Cast-in-Place Concrete.
2. Strength: 4,000 psi at 28 days.
3. Air entrained.
4. Finish: Rough troweled.
B. Concrete Reinforcement: As specified in Section 03 20 00 – Concrete Reinforcing.
2.6 MATERIALS
A. Bedding and Cover:
1. Bedding and cover: AASHTO No. 8, as specified in Section 31 05 16 – Aggregates for Earthwork.
2. Backfill from above Pipe to Finish Grade: Material as specified in Section 31 23 23
– Fill.
3. Subsoil: No rocks more than 6 inches in diameter, frozen earth, or foreign matter.
Herbert, Rowland & Grubic, Inc. 33 31 11 - 6 000483.0450
2.7 FINISHES
A. Galvanizing:
1. Hot-dip galvanize after fabrication.
2. Comply with ASTM A123/A123M.
2.8 ACCESSORIES
A. Pipe Markers: As specified in Section 33 05 97 – Identification and Signage for Utilities.
2.9 SOURCE QUALITY CONTROL
A. Section 01 40 00 – Quality Requirements: Requirements for testing, inspection, and analysis.
B. Provide shop inspection and testing of pipe.
C. Certificate of Compliance:
1. If manufacturer is approved by authorities having jurisdiction, submit certificate of compliance indicating Work performed at manufacturer's facility conforms to Contract Documents.
2. Specified shop tests are not required for Work performed by approved manufacturer.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Section 01 73 00 – Execution Requirements: Requirements for installation examination.
B. Verify that trench cut is ready to receive Work of this Section.
C. Verify that excavations, dimensions, and elevations are as indicated on Drawings.
3.2 PREPARATION
A. Section 01 73 00 – Execution Requirements: Requirements for installation preparation.
B. Correct over-excavation with coarse aggregate.
C. Remove large stones or other hard materials that could damage pipe or impede consistent backfilling or compaction.
D. Protect and support existing sewer lines, utilities, and appurtenances.
E. Utilities:
1. Maintain profiles of utilities.
2. Coordinate with other utilities to eliminate interference.
3. Notify Architect/Engineer if crossing conflicts occur.
Herbert, Rowland & Grubic, Inc. 33 31 11 - 7 000483.0450
3.3 INSTALLATION
A. Bedding:
1. Excavate pipe trench as specified in Section 31 23 16.13 – Trenching.
2. Excavate to lines and grades as indicated on Drawings, or as required to accommodate installation of encasement.
3. Dewater excavations to maintain dry conditions and to preserve final grades at bottom of excavation.
4. Provide sheeting and shoring as specified in Section 31 23 16.13 – Trenching.
5. Placement:
a. Place bedding material at trench bottom.
b. Level materials in continuous layer not exceeding 8-inch compacted depth.
c. Compact to 95 percent of maximum density.
B. Piping:
1. Install pipe, fittings, and accessories according to ASTM D2321, and seal joints watertight.
2. Lay pipe to slope gradients as indicated on Drawings.
3. Begin at downstream end of system and progress upstream.
4. Bedding: Install at sides and over top of pipe, to minimum compacted thickness of 12 inches.
5. Lay bell-and-spigot pipe with bells upstream.
6. Backfill and compact as specified in Section 31 23 16.13 – Trenching.
7. Do not displace or damage pipe when compacting.
8. Connect pipe to existing sewer system, using doghouse manhole connection.
9. Pipe Markers: As specified in Section 33 05 97 – Identification and Signage for
Utilities.
10. Installation Standards: Install Work according to Northwestern Chester County
Municipal Authority standards.
C. Manholes: As specified in Section 33 05 61 – Concrete Manholes.
D. Backfilling: As specified in Section 31 23 23 – Fill.
3.4 TOLERANCES
A. Section 01 40 00 – Quality Requirements: Requirements for tolerances.
B. Maximum Variation from Indicated Slope: 1/8 inch in 10 feet.
3.5 FIELD QUALITY CONTROL
A. Section 01 40 00 – Quality Requirements: Requirements for inspecting and testing.
B. Request inspection by Engineer prior to and immediately after placing bedding.
C. Testing:
Herbert, Rowland & Grubic, Inc. 33 31 11 - 8 000483.0450
1. If tests indicate that Work does not meet specified requirements, remove Work, replace, and retest.
2. Pipe Testing:
a. Pressure Testing: As specified in Section 33 05 05.31 – Hydrostatic Testing and 33 05 05.41 – Air Testing.
b. Deflection Testing: As specified in Section 33 05 05.43 – Mandrel Testing.
3. Compaction Testing:
a. Comply with ASTM D698 or ASTM D1557.
b. Testing Frequency: As directed by Engineer.
3.6 PROTECTION
A. Section 01 73 00 – Execution Requirements: Requirements for protecting finished Work.
B. Protect pipe and aggregate cover from damage or displacement until backfilling operation is in progress.
C. Cap open ends of piping during periods of Work stoppage.
END OF SECTION 33 31 11
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