SOW Water Main Extension PVC.pdf

OK24-F95 SR# 4443 Osage County

Caylen Willingham, P.E. Water Main PVC

STATEMENT OF WORK

1.01 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Furnish and install a water main extension as shown on the plans.

1.02 SITE LOCATION

A. Littlewing Ave, Pawhuska Indian Village, Pawhuska, 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 to rescheduling the work.

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

1.04 QUALITY ASSURANCE

A. Perform work under the direction of personnel licensed in the state including, but not limited to Plumbing.

1.05 WARRANTY

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

1.06 WATER MAIN EXTENSION (4-inch diameter and smaller)

A. PVC Pipe Material Requirements

1. Pipe shall be PVC 1120 pressure pipe made from class 12454 materials as defined by ASTM D-1784 with outside diameter dimensions of steel or cast iron pipe. The PVC compounds shall be suitable for potable water meeting NSF Standard No. 61.

PVC pipe shall be manufactured to meet the requirements of ASTM D2241. Use 20 foot pipe lengths. Joints are bell and spigot type.

a. Pressures less than or equal to 125 psi

1) Pipe: Use PVC Class 160 SDR 26 or Class 200 SDR 21 pipe.

2) Fittings: Use schedule 40 PVC (ASTM D-2466) or

Schedule 80 PVC (ASTM D-2467) fittings.

b. Pressures greater than 125 psi use pressure class of piping and fittings as shown on the bid sheet.

1.07 INSTALLATION

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

OK24-F95 SR# 4443 Osage County

Caylen Willingham, P.E. Water Main PVC

B. Water and sewer separation requirements.

1. Maintain a minimum vertical separation between water service lines and sewer lines of 24 inches with the water service line placed above the sewer line.

Otherwise the water service line shall be constructed of ductile iron or placed within Steel Encasement Pipe for a 20-foot section centered at the crossing.

2. Maintain a minimum 10 foot separation between water service lines and sewer lines. Otherwise the water service line shall be constructed of ductile iron or placed within a Steel Encasement Pipe for the entirety of the length for which the minimum separation is not maintained.

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 1 inch, large dirt clods, and any frozen material.

C. Bedding: If the trench bottom is hardpan, rock, or has stones larger than 1 inch in diameter in the largest direction:

a. Over excavate 6 inches.

b. Place 6 inches of mechanically compacted imported bedding (maximum particle size 1 inch) under the pipe

c. Place pipe in trench.

d. Place 6 inches of mechanically compacted imported bedding (maximum particle size 1 inch) on the sides and above the pipe D. Backfill: restore trenches to initial grade.

1.09 TESTING

A. Before joints are covered, test pipe for leaks. Test the installed pipe for leakage in accordance with AWWA standard specifications. Leakage must not exceed 10 gal/inch diameter per mile of pipe per 24 hours at 150 psi testing pressure.

B. Visually inspect all connections and fittings for leaks in the presence of the Construction Inspector.

C. Repair all leaks before backfilling.

1.10 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.

1.11 CLOSEOUT ACTIVITIES

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

B. Provide record drawings to the Project Engineer.