SOO_Grit Facilities Rehab_05.03.24.docx

USIBWC South Bay International Wastewater Treatment Plant Grit Facilities Rehabilitation San Diego County, California

International Boundary and Water Commission United States and Mexico United States Section

Statement of Objectives South Bay International Wastewater Treatment Plant Grit Facilities Rehabilitation San Diego County, California

RFP

May 3, 2024

International Boundary and Water Commission United States and Mexico United States Section Engineering Services Division El Paso, Texas

SOUTH BAY INTERNATIONAL WASTEWATER TREATMENT PLANT EMERGENCY REPAIR STATEMENT OF OBJECTIVES

SECTION I. PURPOSE

The purpose of this Statement of Objectives (SOO) is to describe the work required to provide an emergency replacement of components within the grit facilities throughout the South Bay International Wastewater Treatment Plant (SBIWTP).

SECTION II. SCOPE AND BACKGROUND

The primary goal of this acquisition is to replace 3 Grit Classifiers, 6 Grit Gallery Pumps, 6 Grit Pump VFDs, 2 Primary Channel Air Blowers, and 2 Grit Air Blowers. There is also a requirement to conduct a Short Circuit Arc Flash Study. All components are past its life remaining operations, which could lead to partially treated sewage not meeting permit standards discharged through ocean outfall, leading to permit violations. The rehabilitation and replacements are required to maintain safe and reliable operations of SBIWTP.

There are no redundancies at any of the previously mentioned grit operations.

SECTION III. PERIOD OF PERFORMANCE

The period of performance shall not exceed 365 days from the date of notice to proceed.

SECTION IV. PERFORMANCE OBJECTIVES

1. The Contractor shall provide all labor, equipment, tools, materials, and services to replace the following that meet or exceed the specifications of the existing and fit all existing equipment connections as required:

1. Grit Classifiers

a. 3 classifiers/separators

b. 3 motors

c. Grit Piping (Ductile Iron Glass lined)

(1) Plug Valves w/handwheel

(2) Fittings (Elbow, Cross, Tee, Reducer, Wye, Cap, Etc.)

(3) Vitaulic Couplings

(4) Support Brackets, Clevis Hangers

2. Grit Gallery

a. 6 pumps

b. Grit Piping (Ductile Iron Glass lined) replace all suction & discharge pipe all the way to reducer 90 elbow at top (Next to field)

(1) Plug Valves w/handwheel & chainwheel operators

(2) Fittings (Elbow, Cross, Tee, Reducer, Wye, Cap, Etc.)

(3) Vitaulic Couplings

(4) Support Brackets, Clevis Hangers

(5) 6” Flow Meter Flange

c. 6 VFDs

3. Primary Channel Air Blowers

a. 2 Blowers

4. Grit Blowers

a. 2 Blowers

2. The Contractor shall include any incidentals such as pulley (sheaves), belts, etc. that they determine to be needed.

3. The Contractor shall determine if the existing pumps can be rehabilitated or used for spare parts. The Contractor shall then remove and properly dispose of any material not able to rehabilitate or use.

4. The Contractor shall start up and test the new classifiers, grit pumps, blowers and VFDs in accordance with manufacturer recommendations.

5. The Contractor shall ensure proper function and operation of the new classifiers, grit pumps, blowers and VFDs.

6. The Contractor shall provide manufacturer’s warranties and update the O&M manuals and the shop drawings.

SECTION V. EXISTING SPECIFICATIONS

The contractor shall field verify all existing information. Some, but not all, existing specifications provided below:

A. Grit Classifiers/Separators specifications:

· Manufacturer: Wemco Pump

· Type: 18in-FF Hydrogritter

· Classifier: 18-inch diameter screw type, fullflared tank

· Separator: Cyclone type, WEMCLONE-1500C

· Capacity: 500 GPM @ 8 PSIG

· Feed Chamber Size: 15 in.

· Reducer Type: Orbital B. Grit Pumps specifications:

· Manufacturer: Discflo Pump

· Model No: 604-17

May 03, 2024 Statement of Objectives image1.png image2.jpeg image3.jpeg