SOW_Lift Station and SSL_KMY EDITS.docx

Individual Lift Station and Force Sewer Service Line Date: August 2022

STATEMENT OF WORK

1.01 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

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

1.02 SITE LOCATION

A. 1414 South Deleware Avenue, Okmulgee, OK 74447 B. Latitude: 35.6091927 (N) Longitude: -95.9665146 (W) C. Finding Directions: From HWY 75 and 21st Street in Okmulgee, turn west and proceed 2 blocks to home on Deleware Avenue. Brick home on WSOR.

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. Fiberglass Lift Station Basin.

3. Polyethylene Pipe.

4. PVC Pipe.

1.05 QUALITY ASSURANCE

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

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. Nominal diameter:

a. Private service: 4-inch.

b. Sewer main: 8-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.

C. Fittings:

1. Solvent welded SCH40.

1.08 PRESSURIZED SEWER SERVICE LINES

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.

B. Polyethylene Pipe Material Requirements

1. Ultra-high molecular weight polyethylene pipe.

2. PE 4710 IPS DR 9 (pressure rating 200 psi).

3. Nominal diameter: 2-inch.

4. 500-foot coil.

5. Recommended Manufacturer: Silver-Line Plastics Sil-O-Flex IPS SIDR DR 9 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.

1.09 ENCASEMENT PIPING

A. Polyethylene Pipe Material Requirements

1. Ultra-high molecular weight polyethylene pipe.

2. PE 4710 DR7 (wall thickness of 0.0500-inch).

3. Nominal diameter: 3-inch.

4. Rubber or neoprene casing end seals.

a. Stainless steel clamps.

B. Tracer Wire

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

1.010 INDIVIUDAL GRINDER PUMP LIFT STATION

A. Individual Grinder Pump Lift Station Requirements

1. Minimum 70 gallon fiberglass basin.

2. Minimum basin dimensions: 28-inch diameter and 52-inch depth. .

3. Simplex one-horsepower grinder pump.

a. 120-volt, 60 Hz single phase motor.

4. Shall be equipped with high water alarm, tethered float system.

a. Alarm shall be both audial and visual.

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

6. Discharge outlet shall be 2-inch.

7. 25-foot power cord.

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

9. Recommended Manufacturer: Septic Solutions Inc. 70 Gallon Pump Station with 1.0 HP Residential Grinder Pump (Liberty Pumps ProVore PRG101A-2).

1.011 INSTALLATION

A. Contractor shall coordinate with the City of Okmulgee and pay all necessary permit, inspection, and/or all other applicable fees associated with the work.

B. Work shall comply with City of Okmulgee Ordinances, Title 13, Chapter 13.16 – Sewer Permits and Connection Charges.

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

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

E. Install buried electrical cable to homeowner-provided dedicated breaker service.

F. 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%).

G. Water and sewer service crossing and parallel installation.

1. Maintain a 48-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.

H. Pressurized sewer service line shall be encased inside 3-inch polyethylene casing for the entire alignment to prevent any contamination of an adjacent 12-inch water distribution main line.

I. Bore under roadway (Deleware Avenue) as shown on the drawing.

1. Ensure that bore is below any existing utilities such as water, gas, electric, etc.

2. Bore hole diameter shall be same as outside diameter as roadway casing piping.

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

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

J. Install new service connection (tap) on the City’s sewer main.

1. New service connection will include installation of 20 feet of 8-inch SCH40 PVC as the existing sewer main is vitrified clay pipe and cannot be tapped with a saddle or wye.

1.012 TRENCH

A. Depth: Minimum 30 inches to the top of the encasement pipe.

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

C. Backfill:

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.

d. For sewer main line piping, place 6 inches of clean gravel below and above piping to properly bed sewer main.

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, including specialized rock teeth.

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: excavation with earthmoving equipment specialized for rock removal, 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.

1.013 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 to ensure functionality of installed facilities.

1.014 CLOSEOUT ACTIVITIES

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

Author: Andrew Banta Sewer Service Lines PE