333000 - Sanitary Sewer Utilities.pdf

Batavia VAMC Contract #36C24219C0228

Improve Ground Water, Building 30 Project #528A4-18-203

06-01-13

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SECTION 33 30 00

SANITARY SEWER UTILITIES

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies materials and procedures for construction of outside, underground sanitary sewer systems that are complete and ready for operation. This includes piping, structures and all other incidentals.

1.2 RELATED WORK

A. Excavation, Trench Widths, Pipe Bedding, Backfill, Shoring, Sheeting, Bracing: Section 31 20 11, EARTH MOVING (Short Form).

B. General plumbing, protection of Materials and Equipment, and quality assurance: Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING.

C. Fabrication of Steel Ladders: Section 05 50 00, METAL FABRICATION.

D. Submittals: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA AND SAMPLES.

E. Erosion and Sediment Control: Section 01 57 19, TEMPORARY ENVIRONMENTAL

CONTROLS.

1.3 ABBREVIATIONS

A. PVC: Polyvinyl chloride plastic

B. HDPE: High Density Polyethylene pipe

1.4 DELIVERY, STORAGE AND HANDLING

A. Store plastic piping protected from direct sunlight and support to prevent sagging and bending. Protect stored piping from moisture and dirt by elevating above grade. Protect flanges, fittings, and specialties from moisture and dirt.

B. Handle manholes according to manufacturer's written rigging instructions.

1.5 COORDINATION

A. Coordinate exterior utility lines and connections to building lines up to 5 feet of building wall.

1.6 QUALITY ASSURANCE:

A. Products Criteria:

1. When two or more units of the same type or class of materials or equipment are required, these units shall be products of one manufacturer.

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2. A nameplate bearing manufacturer's name or trademark, including model number, shall be securely affixed in a conspicuous place on equipment. In addition, the model number shall be either cast integrally with equipment, stamped, or otherwise permanently marked on each item of equipment.

B. Comply with the rules and regulations of the Public Utility having jurisdiction over the connection to Public Sanitary Sewer lines and the extension, and/or modifications to Public Utility Systems.

1.7 SUBMITTALS:

A. Manufacturers' Literature and Data shall be submitted for the following as one package:

1. Pipe, Fittings, and Appurtenances.

2. Jointing Material.

3. Check Valves.

1.8 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society for Testing and Materials (ASTM):

A74-09..................Cast Iron Soil Pipe and Fittings

A185/A185M-07...........Steel Welded Wire Reinforcement, Plain, for

Concrete

A615/A615M-09b..........Deformed and Plain Carbon-Steel Bars for

Concrete Reinforcement

A746-99.................Ductile-Iron Gravity Sewer Pipe

C478-09.................Precast Reinforced Concrete Manhole Sections

C857-11.................Minimum Structural Design Loading for

Underground Precast Concrete Utility Structures

C890-11.................Minimum Structural Design Loading for

Monolithic or Sectional Precast Concrete Water and Wastewater Structures

C913-08.................Precast Concrete Water and Wastewater

Structures

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C923-08.................Resilient Connectors Between Reinforced

Concrete Manhole Structures, Pipes, and

Laterals

C924-02(2009)...........Testing Concrete Pipe Sewer Lines by Low-

Pressure Air Test Method

C990-09.................Joints for Concrete Pipe, Manholes, and precast

Box Sections using Preformed Flexible Joint

Sealants

C1173-10................Flexible Transition Couplings for Underground

Piping Systems

C1440-08................Thermoplastic Elastomeric (TPE) Gasket

Materials for Drain, Waste and Vent (DWV), Sewer, Sanitary and Storm Plumbing Systems

C1460-08................Shielded Transition Couplings for Use With

Dissimilar DWV Pipe and Fittings Above Ground

C1461-08................Mechanical Couplings Using Thermoplastic

Elastomeric (TPE) Gaskets for Joining Drain, Waste and Vent (DWV), Sewer, Sanitary and Storm

Plumbing systems for Above and below Ground Use

D2321-11................Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications

D3034-08................Type PSM Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings

F477-10.................Elastomeric Seals (Gaskets) for Joining Plastic

Pipe

F679-08.................Poly(Vinyl Chloride) (PVC) Large-Diameter

Plastic Gravity Sewer Pipe and Fittings

F891-10.................Coextruded Poly(vinyl Chloride) (PVC) Plastic

Pipe With a Cellular Core

F949-10.................Poly(Vinyl Chloride) (PVC) Corrugated Sewer

Pipe With a Smooth Interior and Fittings

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F1417-11................Standard Test Method for Installation

Acceptance of Plastic Gravity Sewer Lines Using

Low-Pressure Air

F1668-08................Construction Procedures for Buried Plastic Pipe

C. American Water Works Association (AWWA):

C105/A21.5-10...........Polyethylene Encasement for Ductile-Iron Pipe

Systems

C110-08.................Ductile-Iron and Gray-Iron Fittings

C111/A21.11-06..........Rubber Gasket Joints for Ductile Iron Pressure

Pipe and Fittings

C151/A21.51-09..........Ductile Iron Pipe, Centrifugally Cast

C153/A21.53-06..........Ductile Iron Compact Fittings for Water Service

C219-11.................Bolted, Sleeve-Type Couplings for Plain-End

Pipe

C512-07.................Air Release, Air/Vacuum and Combination Air

Valves for Water Works Service

C600-10.................Installation of Ductile-Iron Mains and Their

Appurtenances

C900-07.................Polyvinyl Chloride (PVC) Pressure Pipe and

Fabricated Fittings, 4 In. Through 12 In. (100 mm Through 300 mm), for Water Transmission and

Distribution

D. American Society of Mechanical Engineers:

A112.14.1–2003..........Backwater Valves

A112.36.2M-1991.........Cleanouts

1.9 WARRANTY

A. The Contractor shall remedy any defect due to faulty material or workmanship and pay for any damage to other work resulting therefrom within a period of one year from final acceptance. Further, the

Contractor will provide all manufacturers’ and supplier's written guarantees and warranties covering materials and equipment furnished under this Contract.

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PART 2 - PRODUCTS

2.1 FACTORY-ASSEMBLED PRODUCTS

A. Standardization of components shall be maximized to reduce spare part requirements.

B. All pipe and fittings used in the construction of force mains shall be rated to meet the system maximum operating pressure with a minimum of

150 psi (1035 kPa).

C. The Contractor shall guarantee performance of assemblies of components, and shall repair or replace elements of the assemblies as required to deliver specified performance of the complete assembly.

2.2 HDPE PRESSURE (FORCE) MAIN:

A. All fittings shall be fully pressure rated to match the pipe pressure rating. All fittings shall be molded or fabricated by the manufacturer.

No contractor fabricated fittings are allowed. Thrust blocks shall not be permitted.

1. The HDPE pipe manufacture shall supply all HDPE fittings, accessories, adapters, and/or special components required to perform the work.

B. HDPE Pipe: Less than 4 inches in diameter

1. Pipe shall be manufactured from a PE4710, or higher, high density resin compound meeting the specifications of ASTM D3350 with a cell classification of PE445474C.

2. HDPE pipe shall comply with AWWA Specifications C901.

3. The pipe shall contain no recycled compounds except that generated in the manufacturer’s own plant from resin of the same specification from the same raw material.

4. Pipe and accessories shall be 200 psi at 73.4 F degrees meeting requirements of Standard Dimension Ratio (SDR) 11 as a minimum strength.

2.3 PRESSURE-TYPE PIPE COUPLINGS

A. Tubular-Sleeve Couplings:

1. Couplings shall meet AWWA C219, with center sleeve, gaskets, end rings, and bolt fasteners.

B. Metal, bolted, sleeve-type, reducing or transition couplings for joining underground pressure piping:

1. Couplings shall meet a 200-psi (1380-kPa) minimum pressure rating and ends of same sizes of the main line piping.

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C. Center-Sleeve Material:

1. Sleeve shall be Manufacturer's standard.

D. Gasket material: Gaskets shall be natural or synthetic rubber.

E. Metal component finish: Finish shall be a corrosion-resistant material or coating.

2.4 BACKWATER VALVES

A. Cast-Iron Backwater Valves:

1. Valve Material: Valve shall be as per ASME A112.14.1, gray-iron body and bolted cover, with bronze seat.

2. Valve will include a ball check valve and hub-and-spigot ends.

B. PVC Backwater Valves:

1. PVC valve shall be with PVC body, PVC removable cover, and PVC ball check valve.

2.5 CONCRETE (NOT USED)

2.6 WET WELL (NOT USED)

2.7 WARNING TAPE

A. Warning tape shall be standard, 4 mil (0.1 mm) polyethylene 3 inch (76

mm) wide tape detectable type, green with black letters and imprinted with “CAUTION BURIED SEWER LINE BELOW”.

PART 3 - EXECUTION

3.1 PIPING INSTALLATION

A. Drawing plans and details indicate the general location and arrangement of underground sanitary sewer piping. Install piping as indicated, to extent practical. Where specific installation is not indicated, follow piping manufacturer's written instructions.

B. Install piping true to grades and alignment indicated on the drawings, with unbroken continuity of invert. Install gaskets, seals, sleeves, and couplings according to manufacturer's written instructions for using lubricants, cements, and other installation requirements.

C. Do not lay pipe on unstable material, in wet trench or when trench and weather conditions are unsuitable for the work.

D. Support pipe on compacted bedding material.

E. Inspect pipes and fittings for defects before installation. Defective materials shall be plainly marked and removed from the site. Cut pipe shall have smooth regular ends at right angles to axis of pipe.

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F. Lower pipe into trench carefully and bring to proper line, grade, and joint. After jointing, interior of each pipe shall be thoroughly wiped or swabbed to remove any dirt, trash or excess jointing materials.

G. Do not walk on pipe in trenches until covered by layers of bedding or backfill material to a depth of 12 inches (300 mm) over the crown of the pipe.

H. Warning tape shall be continuously placed 12 inches (300 mm) above sewer pipe

I. Install proper size increasers, reducers, and couplings where different sizes or materials of pipes and fittings are connected. Reducing size of piping in direction of flow is prohibited.

J. When installing pipe under streets or other obstructions that cannot be disturbed, use horizontal directional drilling (HDD).

K. Clear interior of piping and manholes of dirt and superfluous material as work progresses. Maintain swab or drag in piping, and pull past each joint as it is completed. Place plug in end of incomplete piping at end of day and when work stops.

3.2 HORIZONTAL DIRECTIONAL DRILLING (HDD)

A. General – Install the pipe to the lines and grades shown in the plans.

Use workers that are skilled in the method of construction. Construct with good workmanship by skilled workers along with proper safety precautions. Locate ends of trenchless construction and pits beyond the vehicle recovery area of the pavement areas. The vehicle recovery area may be reduced using acceptable traffic control methods.

B. Water Control – Provide groundwater control and removal as appropriate for the method of excavation and installation. Remove the groundwater using an engineered dewatering system. Keep surface waters out of the excavation pits.

C. Shoring – Maintain continuous and active support (shoring) to the soils surround both the pit and the trenchless excavation. Provide temporary or permanent shoring, as needed. Provide temporary shoring to maintain the hole or pit excavation for the duration of the work. Casing pipe 36 inches and larger, tunnel liner, pit and trench shoring and shoring that is not certified for permanent use is considered temporary. Provide permanent shoring when desired or specified to maintain the hope hole for an indefinite time. Permanent shoring requires certification of durability and a design life of 100+ years.

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Fill all voids around the excavation and shoring with structural fill material as work progresses. Fill the annular space between the specified pipe and temporary shoring.

Either work continuously (24 hours/day and 7 days/week) on the operations from the time the excavation begins through filling of voids or use an engineered system for shoring the excavation during work stoppage.

D. Pre-Construction Meeting – The Contractor shall conduct a pre-construction meeting with the COR to review the proposed method for installation of the pipe. Conduct the meeting at least 48 hours before beginning installation. The meeting shall consist of, but is not limited to:

1. Presentation of the construction methods for understanding by all involved,

2. Presentation of the methods for filling any potential voids around the pipe,

3. Demonstrating that appropriate equipment and materials are on site,

4. Providing a progress schedule, and

5. Demonstrating ability to react to failures or pavement settlement.

E. Directional Drilling - For drilled holes up to 6 inches diameter in stable ground, the hole may be drilled and reamed followed by pulling the pipe into the hole within 8 hours. For drilled holes greater than 6 inches, simultaneously pull the pipe or casing into the hole as reaming occurs. Multi-pass reaming larger than 6 inches requires certification by the Contractor’s engineer that the soils are self-supporting of the dead and live loads.

When under pavement or within one horizontal to one vertical distance from pavement, maintain the depth of cover as follows:

DEPTH OF COVER FOR DIRECTIONAL DRILLING

Drilled Hole Diameter Single Pass Reaming

Minimum Depth of Cover

Multi-Pass Reaming

Minimum Depth of Cover

2” to 6” 4 ft 4 ft

>6” to 22” 8 times hole diameter 12 times hole diameter

>22” to 32” 15 ft 25 ft

Begin bores at locations that allow transitioning the bore to meet the above depths. Use drilling fluids as appropriate for the type of soils. Pump drilling fluids only while drilling or reaming. Monitor flow rates to match the amount leaving the bore hole. Do not increase

33 30 00-9 pressure or flow to free stuck drillheads, reamers, or piping. Limit drilled or reamed holes to 2 inches larger than the pipe.

F. Quality Control:

1. Ground Movement – Before excavation, establish control points for measuring settlement of pavement and concrete surfaces at 10 ft intervals along the centerline and 10 feet each side of the pipeline.

A land surveyor licensed in the State shall monitor these points daily until construction is complete. Cease trenchless operations when measured settlement exceeds 0.02 feet. Determine cause of settlement and repair as necessary. Modify trenchless methods as needed.

2. Line and Grade – Abandon and grout all pipes that are not at required alignment and grade. Trenchless installation of proposed pressure pipeline may not vary more than 2% of total length from required horizontal alignment, one foot from vertical alignment and shall maintain minimum cover.

3. Leakage – Control leakage through tunnel walls to minor seepage.

Seal all leaks in pipes, casing, or other permanent shoring.

4. Roundness – Provide permanent shoring with at least 95% of nominal diameter in all directions.

5. External Voids – Fill all external voids greater than 2 inches high or 2 feet wide. Fill with compacted flowable fill, grout, or Class

II or III select material.

3.3 PIPE JOINT CONSTRUCTION

A. Join force-main, pressure piping according to the following:

1. Join HDPE pressure piping by butt fusion, socket fusion, electrofusion, or according to manufacturer’s recommendations.

2. Join dissimilar pipe materials with pressure-type couplings.

B. Pipe couplings, expansion joints, and deflection fittings with pressure ratings at least equal to piping rating may be used in applications below unless otherwise indicated.

1. Use pressure pipe couplings for force-main joints.

3.4 SEWER AND MANHOLE SUPPORTS, CONCRETE CRADLES WITHIN VAULTS (NOT USED)

3.5 BUILDING SERVICE LINES

A. Install sanitary sewer service lines to point of connection within approximately 5 feet (1500 mm) outside of building(s) where service is required and make connections. Coordinate the invert and location of the service line with the Contractor installing the building lines.

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3.6 WET WELLS (NOT USED)

3.7 BACKWATER VALVE INSTALLATION (NOT USED)

3.8 CONNECTIONS

A. Make connections to existing piping by coring through basement wall and installing the pipe at the design invert. Install an elastomeric gasket around the pipe, and grout the interstitial space between the pipe and the core.

3.9 PIPE SEPARATION (NOT USED)

3.10 IDENTIFICATION

A. Install green warning tape directly over piping and at outside edges of underground manholes.

3.11 FIELD QUALITY CONTROL

A. All systems shall be inspected and obtain the Resident Engineer's approval. Prior to final acceptance, provide a video record of all piping from the building to the connection to existing to show the lines are free from obstructions, properly sloped and joined.

B. To inspect, thoroughly flush out the lines and manholes before inspection. Lamp test between structures and show full bore indicating sewer is true to line and grade. Lips at joints on the inside of gravity sewer lines are not acceptable.

1. Submit separate report for each system inspection.

2. Defects requiring correction include the following:

a. Alignment: Less than full diameter of inside of pipe is visible between structures.

b. Deflection: Flexible piping with deflection that prevents passage of ball or cylinder of size not less than 92.5 percent of piping diameter.

c. Damage: Crushed, broken, cracked, or otherwise damaged piping.

d. Infiltration: Water leakage into piping.

e. Exfiltration: Water leakage from or around piping.

3. Replace defective piping using new materials, and repeat inspections until defects are within allowances specified.

4. Re-inspect and repeat procedure until results are satisfactory.

C. Air Tests: Test sanitary sewerage according to requirements of authorities having jurisdiction and the following:

1. Test plastic gravity sewer piping according to ASTM F1417.

2. Clean and isolate the section of sewer line to be tested. Plug or cap the ends of all branches, laterals, tees, wyes, and stubs to be

33 30 00-11 included in the test to prevent air leakage. The line shall be pressurized to 4 psi (28 kPa) and allowed to stabilize. After pressure stabilization, the pressure shall be dropped to 3.5 psi (24 kPa) greater than the average back-pressure of any groundwater above the sewer.

3. For force mains, perform testing after supports and anchors are installed. Test at pressure not less than 1-1/2 times the maximum system operating pressure, but not less than 150 psi (1035 kPa).

3.12 CLEANING

A. Clean dirt and superfluous material from interior of piping.

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