6552 WLX WSL SOW PVC PE Pipe.docx

Date: March 2024

STATEMENT OF WORK

1.01 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Install 850 linear feet of 2-inch SDR21 PVC water main line, fittings, gate valve, and other appurtenance specified in the contract drawings to serve one home.

B. Install 400 linear feet of 2-inch DR 11 HDPE water service line and isolation valve as shown in the contract drawings.

1.02 SITE LOCATION

A. 18045 Cherry Road, Henryetta, OK 74437 B. Legal Description: Lot 4, Section 7, Township 12 North, Range 12 East, Okmulgee County, Oklahoma.

C. Latitude: 35.522441298 (N) Longitude: -95.874616946 (W) D. Finding Directions: From the intersection of Hwy 52 & 62 in Morris, turn south on Hwy 52. Continue for 6 miles and turn west on Cherry Road. Continue for approximately 1 mile. Driveway on NSOR.

1.03 Construction Schedule

A. Contact the Project Oversight three business days before the start of any work.

B. Failure to perform work on the date scheduled shall require 24-hour notice for rescheduling the work.

C. Leave all work exposed until inspected and approved. Work not inspected before it is covered shall be re-exposed at the Contractor’s expense.

D. All work shall be performed Monday – Friday ONLY between the hours of 8:00 a.m. – 5:00 p.m. No work is to be performed on the weekends and/or federal holidays unless other work schedule arrangements are approved by the Project Oversight to do otherwise.

1.04 QUALITY ASSURANCE

A. Perform work in accordance with the Oklahoma Department of Environmental Quality (ODEQ) regulations and contract drawings.

1.05 WARRANTY

A. Provide a minimum one-year warranty for all materials and labor, covering defects in the materials or workmanship.

1.06 PUBLIC WATER DISTRIBUTION PIPING POLYVINYL CHLORIDE PIPE

A. References (use latest versions)

1. ASTM D2241 Standard Specification for Polyvinyl Chloride (PVC) Pressure-Rated Pipe (SDR Series).

2. AWWA Manual M23 PVC Pipe Design and Installation.

3. AWWA C605 Underground Installation of Polyvinyl Chloride (PVC) and Molecularly Oriented Polyvinyl Chloride (PVCO) Pressure Pipe and Fittings.

4. AWWA C651 Disinfecting Water Mains.

5. NSF Standard 014 Plastic Piping System Components and Related Materials.

6. NSF Standard 061 Drinking Water System Components – Health Effects.

B. PVC Pipe Material Requirements

1. ASTM D2241.

2. Nominal diameter: 2-inch.

3. Pressure rating: SDR21 (Class 200).

4. Twenty foot pipe lengths.

5. Gasket bell and spigot joints.

C. Fittings

1. Epoxy-coated, ductile iron.

2. Mechanical joint.

3. Conforms to AWWA C110 and AWWA C111 ductile and gray iron fittings.

4. Conforms to AWWA C153 for ductile iron compact fittings.

5. Fusion bonded epoxy conforming to AWWA C116.

D. Tracer Wire

1. #12 AWG, solid-core, insulated copper wire.

E. Driveway Casing

1. ASTM D1785.

2. Diameter: 4-inch.

3. Pressure rating: SCH40.

4. Twenty foot pipe lengths.

5. Rubber or neoprene casing end seals.

a. Stainless steel clamps.

1.07 PUBLIC WATER UTILITIY DISTRIBUTION GATE VALVES

A. References (use latest versions)

1. AWWA C509 Resilient Seat Gate Valves for Water and Sewerage Systems.

2. AWWA C515 Reduced-Wall, Resilient-Seated Gate Valves for Water Supply Service.

3. AWWA C550 Protective Epoxy Interior for Valves and Hydrants.

4. NSF 61 Drinking Water System Components – Health Effects.

B. Gate Valve Material Requirements

1. Meet or exceed AWWA C509 or C515 and NSF 61.

2. 250 psi minimum pressure rating.

3. Provided a bottle tight seal.

4. Non-rising stem (NRS).

5. 2-inch square stem-operating nut.

a. Open counter-clockwise.

6. Ductile iron construction of:

a. Body.

b. Bonnet.

c. Wedge.

d. Operating nut.

7. Rubber encapsulated wedge.

8. Fusion bonded epoxy coating on interior and exterior of valve.

9. Supply valves with mechanical restraining joints.

C. Valve Boxes

1. 2-piece, screw-type, adjustable cast iron valve boxes.

2. Non-locking cover.

3. Mushroom-type, cast iron cover.

1.08 WATER SERVICE LINE POLYETHYLENE PIPE

A. References (use latest versions)

1. ASTM D2609 Standard Specification for Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe.

2. ASTM D2737 Standard Specification for Polyethylene (PE) Plastic Tubing.

3. ASTM D2774 Standard Practice for Underground Installation of Thermoplastic Pressure Piping.

4. AWWA C651 Disinfecting Water Mains.

5. NSF Standard 014 Plastic Piping System Components and Related Materials.

6. NSF Standard 061 Drinking Water System Components – Health Effects.

B. PE Pipe Material Requirements

1. Ultra-high molecular weight polyethylene pipe.

2. PE 4710 IPS DR 11 (pressure rating 200 psi).

3. Diameter: 2-inch.

4. 500-foot coil.

5. Recommended Manufacturer: Silver-Line Plastics Sil-O-Flex OD DR 11 or approved equal.

C. Fittings

1. Non-flare compression type fittings with stainless steel pipe stiffeners at each joint, heat (butt) fused, or electro-fused fittings will be accepted.

D. Isolation Valve

1. Ball valve:

a. Brass.

b. ¼-turn handle type.

E. Valve Box

1. Polyethylene box and cover.

2. Minimum dimensions:

a. Length: 21 inches.

b. Width: 16 inches.

c. Height: 12 inches.

3. Recommended Manufacturer: NDS or approved equal.

1.09 INSTALLATION

A. Locate and expose the existing 2-inch PVC water main.

1. Verify material size and type.

B. Remove existing blow off valve.

C. Install water main line, water service line, and appurtenances in the locations, sizes and materials shown on the contract drawings or staked in the field.

D. Install #12 AWG tracer wire along top of the water main line piping, taping at every 10-foot interval.

E. Water and sewer service crossing and parallel installation.

1. Maintain a 10-foot horizontal separation between water and sewer mains, storm sewers, raw water lines, oil and gas lines, and buried electric cables.

2. Maintain a 24-inch vertical separation for crossing water and sewer services. The water service is to be placed above the sewer service whenever possible.

3. Water line splices or joints will not be permitted within 10-feet of a sewer line crossing.

F. Thrust blocking and/or mechanical joint restraints are to be provided at all changes in direction and valves.

G. Support gate valves on solid concrete block.

H. Set valves plumb.

I. Install 4-inch PVC casing across driveway crossing via open cut method and replace gravel in-kind.

J. The terminus of the 2-inch PVC water main line shall consist of a 2-inch gate valve with appropriate concrete blocking or joint restraints. A post hydrant shall be installed by Okmulgee County RWD #4.

1.010 TRENCH

A. Width: No greater than 22 inches plus the diameter of the pipe and no less than 2 inches plus the diameter of the pipe.

B. Depth: Minimum 30 inches of cover on top of the pipe.

C. Bottom: Free from stones greater than ¾ inch, large dirt clods, and any frozen material.

D. Bedding: If the trench bottom is hardpan, rock, or has stones larger than ¾ inch in diameter in the largest dimension:

a. Place 4 inches of mechanically compacted imported bedding (maximum particle size ¾ inch) under the pipe.

b. Place pipe in trench.

c. Place 6 inches of mechanically compacted imported bedding (maximum particle size ¾ inch) on the sides and above the pipe.

E. Backfill: restore trenches to initial grade.

1. Place 12-inch lifts of excavated material over mechanically compacted bedding and compact to a density at least equal to that of the surrounding earth.

2. Mound trenches at a maximum of 3 inches above existing grade to provide for consolidation of the disturbed soil.

3. Surplus materials shall be disposed of as directed by the Project Oversight.

4. Any excessive settlement, exceeding 3 inches, shall be corrected by the contractor at his expense.

1.011 CONNECTION TO EXISTING SYSTEM

A. Locate and expose the existing PVC water main.

1. Verify the type and pressure rating of the pipe.

B. Provide thrust blocking and/or mechanical restraints.

1.012 TESTING

A. Test the installed piping for leakage in accordance with AWWA standard specification. Leakage must not exceed 10 gallons/inch diameter per mile of pipe per 24 hours at 150 testing pressure.

B. Before joints are covered, test pipe for leaks.

C. Visually inspect all connections and fittings for leaks in the presence of the Project Oversight.

D. Repair all leaks before backfilling.

1.013 DISINFECTION

A. Disinfect the water main line in accordance with AWWA C651 before placing in service.

1. Sample and test until 2 consecutive (minimum of 24 hours apart) negative bacteriological tests are obtained.

2. Provide a copy of the negative tests to the Project Oversight.

1.014 CLOSEOUT ACTIVITIES

A. Restore the site as close as is practical to its original condition.

B. Any fencing that is disturbed by the Contractor shall be replaced in-kind and to original condition.

C. All excess material and/or garbage shall be removed from the site by the Contractor and disposed of in accordance to state and federal regulations.

D. Final Inspection:

1. Send written certification that work is complete and read for Final Inspection to the Project Oversight and Contracting Officer.

2. The Contracting Officer will schedule the Final Inspection at a day and time that is convenient to all parties.

E. Punch List:

1. The Contracting Officer will provide a letter of the Contractor listing the deficiencies noted during the Final Inspection.

2. Correct the deficiencies in conformance with the contract drawings and specifications.

3. Send written certification that punch list items are complete to the Project Oversight

Author: Kala Yarnall