SOW (statement of wrok).docx

STATEMENT OF WORK

1.01 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Install 4,960 linear feet of 3-inch DR9 HDPE water main line, fittings, gate valves, air relief valve, flush hydrant and other appurtenance specified in the contract drawings to serve one home.

1.02 SITE LOCATION

A. 26819 South 273rd West Avenue, Slick, OK 74071 B. Legal Description: S/2 N/2 of Section 18, Township 15 North, Range 10 East, Creek County, Oklahoma

1.03 Construction Schedule

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

B. Failure to perform work on the date scheduled will 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 is to 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 federal holidays.

E. Andrew Banta, Project Engineer andrew.banta@ihs.gov Office: (918) 752-3172 Cell: (918) 752-9191

1.04 QUALITY ASSURANCE

A. Perform work under the direction of personnel licensed in the state and where licensing of the trade is regulated by the state including:

1. Plumbing

2. Rock Blasting B. Perform work in accordance with the contract drawings and specifications.

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 POLYETHYLENE PIPE (Sizes: 1-inch through 3-inch diameter IPS PE 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 Lines

5. AWWA C901 Polyethylene (PE) Pressure Pipe and Tubing, ½ in. Through 3 in. for Water Service.

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

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

B. PE Pipe Material Requirements

1. Ultra-high molecular weight polyethylene pipe

a. PE 4710 DR 11 (pressure rating 250 psi) C. Fittings:

1. Non-flare compression type fittings with stainless steel pipe stiffeners at each joint.

D. Valves, Hydrants, Other Appurtenances

1. Comply with material and installation requirements listed in contract drawings and specifications.

1.07 INSTALLATION

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

B. 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 shall not be permitted within 10 feet of a sewer line crossing.

C. Thrust blocking is to be provided at all changes in direction.

1.08 TRENCH

A. Depth: Minimum 30 inches.

B. Bottom: Free from stones greater than 3/4 inch, large dirt clods, and any frozen material.

C. Bedding: If the trench bottom is hardpan, rock, or has stones larger than 3/4 inch in diameter in the largest dimension:

a. Over excavate 6 inches.

b. Place 6 inches of mechanically compacted imported bedding (maximum particle size 3/4 inch) under the pipe

c. Place pipe in trench.

d. Place 6 inches of mechanically compacted imported bedding (maximum particle size 3/4 inch) on the sides and above the pipe D. Backfill: restore trenches to initial grade.

1. Initial Backfill

a. Work material under and around the pipe to ensure full pipe support.

b. Hand tamp to prevent movement of the pipe during placement of material, avoiding contact between the pipe and compaction equipment.

c. Compact in lifts not to exceed 6 inches in loose measurement until 12 inches of backfill covers the top of the pipe.

2. Final Backfill

a. Compact in lifts not to exceed 12 inches in loose measurement with mechanical compacting equipment.

b. Compact all backfill to a density not less than the density of the surrounding undisturbed soil.

c. Surplus materials shall be disposed of as directed by the Project Engineer, or his designated representative.

d. Any excessive settlement, exceeding 1 inch, shall be corrected by the contractor.

1.09 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 Engineer.

D. Repair all leaks before backfilling.

1.010 DISINFECTION

A. Disinfect in accordance with AWWA C651 before placing in service.

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

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

1.011 CLOSEOUT ACTIVITIES

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

B. Final Inspection:

1. Send written certification that work is complete and ready for Final Inspection to the Project Engineer.

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

3. Provide record drawings to the Project Engineer.

C. Punch List:

1. The Contracting Officer should provide a letter to 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 Engineer.