Attachment_8_PWS_LARO_Seven_Bays_Lift_Station_Repairs.pdf

Solicitation no. 140P8326Q0033– Attachment no. 8, PWS

Performance Work Statement

Rehabilitate Seven Bays Marina/Store Wastewater Lift Station

FY2026

Developed By:

Lake Roosevelt National Recreation Area

Facility Management 1008 Crest Drive Coulee Dam, WA

TABLE OF CONTENTS

Section Title.................................................................................Page Numbers

00 30 00 Index of Attachments

DIVISION 1 - GENERAL REQUIREMENTS

01 11 00 Summary of Work ............................................................................... 4-8

SECTION 00 30 00 INDEX OF ATTACHMENTS

General

Solicitation Attachments:

1) AS-BUILT CONSTRUCTION DRAWINGS

2) SEVEN BAYS WASTEWATER OPERATION MANUAL (1990)

3) SEVEN BAYS EXISTING UTILITY OVERVIEW MAP

4) SEVEN BAYS REFERENCE PHOTOS

5) SEVEN BAYS LIFT STATION DESIGN DRAWING

6) LIFT STATION GENERAL LOCATION MAP

7) ABS Piranha PE45-2C Manual. Use to compare list of salient characteristics if “equal pump” will be offered

8) This PWS

9) Wage Determination

10) Relevant Experience / Past Performance

11) Technical Approach

12) FAR 52.204-24 Fill-In

DIVISION 01

GENERAL REQUIREMENTS

SECTION 01 11 00 SUMMARY OF WORK

PART 1: GENERAL

1.1 DESCRIPTION

The Contractor shall provide all personnel, equipment, supplies, facilities, transportation, tools, materials, supervision, and other items and non-personal services necessary to rehabilitate and modernize the existing wet well and septic lift station components within the wet well serving the Seven Bays Marina Large Onsite Septic System (LOSS) within Lake Roosevelt National Recreation Area.

A. Pump Level Control System (Float Tree Assembly) - Contractor shall:

1. Furnish and install a new pump level control system utilizing a rigid float tree assembly installed within the wet well.

2. As identified on attached drawing 606-187026, the float tree assembly shall include five liquid level sensors for pump operations and shall have associated wiring re-connected to the lift station control panel mounted adjacent to the tank.

B. Electrical Service Replacement - Contractor shall:

1. Remove and replace the existing electrical components within the wet well.

2. Remove all electrical wiring servicing the existing/proposed pumps and replace with in-kind wiring and components per attached manual.

• Work includes new conduit and terminations suitable for wet environments.

C. Wet Well Improvements – Contractor shall:

1. Remove all existing pumps, piping, valves, float controls and electrical components.

2. Clean the wet well and apply an epoxy coating per code and industry standards for long-term corrosion protection.

3. Install two submersible grinder pumps (ABS Piranha PE45-2C or approved equal), 208V, 3-phase. Install duplex (dual) 316 stainless steel guide rail system with duck foot base elbows using stainless steel fasteners.

4. Install new discharge piping: 1.5-inch pump discharge to 2-inch stainless steel piping, then transition to 3-inch force main.

D. Replace in-wet well copper discharge piping with wastewater-rated materials –

Contractor shall:

1. Remove the existing hard-piped copper discharge piping within the wet well and replace it with materials compatible with submersible wastewater pump applications.

2. Where rigid discharge piping is required, use 316 stainless steel drop pipe with flanged connections, in combination with a short flexible connector or rubber expansion joint at the pump discharge elbow.

3. Ensure the connections are durable, corrosion resistant, and compatible with the engineered pump station configurations.

E. Startup, Testing, Commissioning, and Documentation - Contractor shall:

1. Provide full startup, testing, and documentation.

1.2 BACKGROUND

A. The Seven Bays Marina is a concession-operated facility featuring houseboat rentals, small boat rentals, seasonal moorage, and a convenience store, along with The Grill at Seven Bays restaurant, which operates seasonally from May through September. Lake Roosevelt National Recreation Area oversees visitor services through administration of a concession contract but retains responsibility for providing wastewater service.

B. The Seven Bays Marina LOSS serves wastewater generated by marina boat pump-out operations and by concession-operated facilities, including a convenience store and restaurant. Wastewater from the marina pump-out station is conveyed under pressure to a single manhole that also receives gravity flow from the convenience store and restaurant, which is equipped with a 1,000-gallon grease interceptor.

C. A centralized sewage lift station receives combined flows from this manhole. The lift station was originally designed with duplex submersible grinder pumps discharging through a 3-inch PVC force main to a series of septic tanks located upslope.

Documentation within the pump control panel indicates that the original pumps were replaced in kind in July 2019 with Sulzer type ABS Piranha PE45 submersible grinder pumps (208 V, 60 Hz, 6 HP). Replacement pumps shall be equal or have same salient characteristics as existing pumps per attached manual.

D. The Seven Bays Marina large onsite sewage system (LOSS) was designed to collect, treat, and dispose of wastewater generated by marina operations, including houseboat pump-out activities and wastewater from concession-operated facilities such as the convenience store and restaurant. The system was designed for a permitted flow of 6,954 gallons per day and constructed in 1990, with subsequent equipment replacements performed in kind.

E. Based on information documented in the Operations and Maintenance Manual, the original lift station pump operating point was approximately 79 gallons per minute against a total dynamic head of approximately 104 feet. This head requirement reflects conveyance through a 3-inch-diameter force main extending approximately 950 linear feet from the lift station to the septic tanks, with an elevation gain of roughly 97 feet.

Table 1. Design criteria for Seven Bays Marina LOSS

1.3 DETAILED WORK DEFINITIONS

A. Wet Well Cleaning and Coating - Contractor shall:

1. Remove all debris, grease and build-up from the wet well using pressure washing and mechanical cleaning methods.

• The surface shall be prepared to a condition suitable for coating adhesion comparable to near-white metal cleaning standards.

• A protective epoxy coating designed for continuous wastewater immersion shall be applied.

B. Pump System – Contractor shall:

1. Install two (2) submersible grinder pumps capable of operating continuously under load.

• Pumps shall operate on 208-volt, 3-phase power and include an integrated grinding mechanism for solids reduction.

• The pumps shall be ABS Piranha PE45-2C or approved equal and must meet system performance requirements and salient characteristics.

C. Guide Rail System – Contractor shall:

1. Install a duplex (dual) guide rail system using 316 stainless steel rails.

• This system shall allow pumps to be raised and lowered without entering the wet well.

• Duckfoot base elbows shall be installed at the bottom to allow automatic connection when pumps are lowered into place.

D. Discharge Piping – Contractor shall:

1. Install stainless steel piping within the wet well and valve vault.

• The system shall include 1.5-inch pump discharge connections, transitioning to 2-inch stainless steel piping, and connecting to the existing 3-inch force main.

• All piping exiting the vault shall be stainless steel until connection.

1.4 LOCATION

A. Construction Camp: Establishment of a camp within the park is not allowed.

B. Work Hours: Work hours are from 7:00 am to 5:30 pm Monday through Friday.

Weekend or holiday work may be allowed with approval of the Contracting Officer.

C. The following conditions shall be followed during the Contractor's work while in the park:

1. Prior to entering the park, all workers shall check boots, tools, equipment, and vehicles for weed seeds, mud that could harbor weed seeds, and plant parts. Any equipment to be used at the site must be pressure cleaned and free of weeds, seeds, debris, and mud to prevent the introduction and/or spread of exotic, invasive plants.

2. Pets are prohibited.

3. To prevent unnatural attractions to bears, no food, garbage, drinks, trash, or food and drink containers shall be placed outside vehicles or trailers, except during actual use.

4. Feeding wildlife is prohibited.

D. Preservation of Natural Features: Confine all operations to work limits of the project, which is within the existing wet well. Prevent damage to natural surroundings. Restore damaged areas, repair or replace damaged trees and plants (per direction by NPS vegetation specialist) at no additional expense to the Government.

E. Hauling Restrictions: Comply with all legal load restrictions in the hauling of materials.

Load restrictions on park roads are identical to the State load restrictions with such additional regulations as may be imposed by the Park Superintendent. Information regarding rules and regulations for vehicular traffic on park roads may be obtained from the Office of the Park Superintendent. A special permit will not relieve Contractor of liability for damage which may result from moving of equipment or materials.

F. Access Restrictions: Components east of the existing wet well are secured behind a locked gate that is managed by the concessionaire. If required, coordinate with COR for vehicular access to septic system components outside of this PWS.

1.5 FIELD VERIFICATION: Field verify all new and existing conditions/dimensions affecting the work of this Contract before beginning cleaning or maintenance activities.

1.6 CONTRACTOR-FURNISHED ITEMS: All materials and equipment shall be Contractor-furnished from outside the park.

1.7 SEQUENCE OF WORK: Work shall proceed in sequence: site verification, demolition, cleaning, installation, testing, and commissioning.

1.8 ACCEPTANCE CRITERIA: The system shall be accepted when pumps operate correctly, alarms function, no leaks exist, and the system performs reliably under normal conditions.

1.9 SITE CONDITIONS: Access to the project location is public, but the project is located within an active marina environment. Interaction with the public and commercial services is likely.

Contractor shall minimize disruption to the public and concessionaire operations while maintaining a safe work environment.

1.10 SITE VISIT: A site visit during solicitation will be established by the Contracting Officer and is strongly recommended to ensure potential contractors verify existing conditions.

PART 2: PRODUCTS

2.1 LIFT STATION REHABILITATION: Contractor shall provide all labor and products for a complete and integrated lift station system. All critical products shall be approved by the COR prior to installation. Critical products are equivalent to and include:

A. Pumps (2) - ABS Piranha PE45-2C or equal grinder pumps, 208V, 3-phase. See attached Piranha Manual for salient characteristics that are required if offering an equal pump.

B. Guide Rails (2) – 316 Stainless Steel duplex system with duck foot base elbows.

C. Piping – All new piping shall be Stainless Steel.

PART 3: EXECUTION Not used.