SOW_Lift Station and SSL_KMY EDITS.pdf

Individual Lift Station and Force Sewer Service Line Date: October 2023

Author: Kala Yarnall Sewer Service Lines PE

STATEMENT OF WORK

1.01 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Furnish and install gravity sewer service line, an individual grinder pump lift station, buried electrical cabling and connections, force sewer service line, encasement piping, and connection to community sewage system as shown on the drawings.

B. Pump and abandon existing septic tank.

1.02 SITE LOCATION

A. 24010 East 97th Street South, Broken Arrow, OK 74014

B. Latitude: 36.023167302 (N) Longitude: -95.708628478 (W)

C. Finding Directions: From HWY 51 and 241st Street intersection, go north on 241st

Street 0.3 mile to 97th Street. Turn west and go to first home on SSOR.

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 SUBMITTALS

A. Product Data

1. Grinder Pump.

2. Lift Station Basin.

3. PVC Pipe.

1.05 QUALITY ASSURANCE

A. Perform work under the direction of personnel licensed in the state of Oklahoma for plumbing and electrical.

1.06 WARRANTY

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

1.07 GRAVITY SEWER SERVICE LINES

A. References (use latest versions)

1. ASTM D1785 Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

2. ASTM D2466 Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

B. PVC Pipe Material Requirements

1. ASTM D2241.

2. 4-inch nominal diameter.

3. Pressure rating: SCH40 (Class 200).

4. Twenty foot pipe lengths.

5. Solvent weld bell and spigot joints.

6. Recommended Manufacturer: Silver-Line Plastics or approved equal.

C. Fittings:

1. 4-inch nominal diameter.

2. Solvent sealed joints.

3. Shall not exceed 45⁰ bends.

4. Recommended Manufacturer: Charlotte Pipe and Foundry Co. or approved equal.

D. Two-Way Cleanouts:

1. 4-inch nominal diameter.

2. Compatible with sanitary sewerage piping material.

3. Sanitary tee.

4. PVC riser pipe with female adapter cap with square-nut threaded plug.

1.08 INDIVIUDAL GRINDER PUMP LIFT STATION

A. Individual Grinder Pump Lift Station Requirements

1. Manufacturer: E/ONE Sewer Systems: D-Series DH071-61 Grinder Pump Lift Station

2. Hard wired level controls

3. Influent inlet shall be 4-inch with a rubber grommet seal.

4. Discharge outlet shall be 1 ¼-inch PVC.

5. 30-foot power cord.

6. Shall include backflow prevention structure that prevents back siphonage of wastewater into pump.

7. Consult with Wagoner County RWD #4 for further specifications and/or requirements.

1.09 FORCE SEWER SERVICE LINES

A. PVC Pipe Material Requirements

1. ASTM D2241.

2. Nominal diameter: 1 ¼-inch.

3. Pressure rating: SCH40 (Class 200).

4. Twenty foot pipe lengths.

5. Solvent weld bell and spigot joints.

6. Recommended Manufacturer: Silver-Line Plastics Schedule 40.

B. Fittings:

1. Solvent welded SCH40.

1.10 ENCASEMENT PIPING

A. PVC Pipe Material Requirements

1. ASTM D2241

2. Nominal Diameter: 3-inch

3. Pressure Rating: SCH40 (Class 200)

4. Rubber or neoprene casing end seals.

a. Stainless steel clamps.

1.11 INSTALLATION

A. Contractor shall coordinate with the Wagoner County RWD #4 and pay all necessary permit, inspection, and/or all other applicable fees associated with the work.

1. These fees are incidental to the sanitary sewerage lift station and shall not be paid separately.

B. Contractor shall coordinate the pumping of the existing septic tank contents with a licensed DEQ septage hauler. All solids and liquids shall be removed via vacuum-pump truck.

C. Contractor shall abandon existing septic tank by penetrating and breaking the bottom of the tank in at least two separate points.

1. Tank walls shall remain intact due to proximity of tank to home foundation.

2. Tank shall be backfilled with imported fill material to fill entirety of tank (5 cubic yards) and match existing grade level.

3. Imported backfill shall not be cohesive soil or exceed particle size of 2-inch diameter (i.e. a clean sand or clean gravel).

D. Install basin level and to manufacturer’s specifications and/or recommendations.

E. Install risers (if necessary) and terminate access cover 2-inches above existing grade.

F. Install buried electrical cable from lift station to homeowner-provided dedicated breaker service. Connect electrical wiring to control panel and breaker service.

G. Install sewer service lines and appurtenances in the locations, sizes and materials shown on the drawings.

1. Minimum slope for gravity flow sewer service lines is 1/8-inch per foot (1%).

2. Fittings are incidental to the sanitary sewer piping and shall not be paid separately.

H. Install cleanouts at the location specified in the drawings.

1. Install two-way cleanout such that the service can be rodded or snaked in either direction.

2. Install sanitary tee in the sanitary sewerage piping and connect riser pipe from the fitting to minimum 2 inches above existing grade.

3. Solvent seal the cleanout out plug to the end of the riser pipe.

I. Water and sewer service crossing and parallel installation.

1. Maintain a 30-inch horizontal separation between water and sewer services.

2. Maintain a 12-inch vertical separation for crossing water and sewer services. The water service is to be placed above the sewer service whenever possible.

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

J. Pressurized sewer service line shall be encased inside 3-inch PVC casing across gravel driveway. Casing shall be installed by open cut method. Gravel to be replaced in kind.

1. Install casing piping.

2. Install skids to ensure carrier pipe is centered in casing.

3. Seal each end of the encasement pipe with clamped rubber or neoprene end seals.

K. Connect to existing sanitary sewer piping with PVC wye, restrained saddle, or other approved fittings.

1. Connection fittings are incidental to the sanitary sewer tap and shall not be paid separately.

1.12 TRENCH

A. Depth: Minimum 6 inches to the top of the pipe for gravity sewer service lines and minimum 30 inches to the top of the pipe for force sewer service lines.

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

C. 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. Mound the trench 3 -6 inches above existing grade to provide for settling.

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

e. Any excessive settlement, exceeding 3 inches, shall be corrected by the contractor.

D. Rock Excavation

1. Definition:

a. Solid rock: large masses or rock which cannot be excavated without hammering, ripping with a dozer, or other specialized equipment.

b. Loose rock: boulders and/or detached stone having a volume of one cubic yard or more.

2. Execution:

a. Rock excavation may be accomplished by any or all of the following methods:

ripping with a bull dozer or jack hammering.

b. Remove excavated rock from site in accordance with city, state, and federal regulations unless the property owner has requested to keep on property.

1.13 TESTING

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

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

Oversight.

C. Repair all leaks before backfilling.

D. Test system operation in presence of Project Oversight to ensure functionality of installed facilities.

1.14 CLOSEOUT ACTIVITIES

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