Attachment 2 Statement of Work.pdf

Statement of Work (SOW) Project: Chilled Water Pump Repair USDA, NCAH Ames, IA

1.0 GENERAL INFORMATION

1.1 Background: The USDA, NCAH at 1920 Dayton Avenue, Ames, IA Building 20 needs chilled water pumps and motors repaired to maintain chilled water flow in order to supply the ventilation systems cooling the facility. Building 20 has three chilled water pumps (CWPs). These three pumps and motors are original and have been in operation since about 2009 with variable frequency drives to power the motors and a flex coupler between the motors and the pumps. Shaft grounding brush assemblies were added to both ends of the motor shafts about 2012. In approximately 2016, they were converted from stuffings boxes that dripped chilled water to cool the bearing assemblies to mechanical seals. The pumps can be operated independently or in combination depending on the chilled water flow needs for the buildings.

1.2 Scope of Work: The intent of the base bid for this project is to replace CWP #2 with a new skid that has a new motor and new chilled water pump attached; rebuild the motor for CWP#1 and CWP#3; and, replace the rotating pump assembly for CWP #1. At the time of bid, alternative option costs should be provided to rebuild the original CWP #2’s motor and pump. Campus will execute these options based on funding available and the proposed costs. Upon project completion, all pumps and motors shall be interchangeable, allowing campus to have a spare pump and motor if the alternatives are executed. Of importance, the chilled water line is drained outside of chiller season. As such, all operational testing must be done while there is a demand for chillers and before the loop has been drained.

1.3 Bid Requirements: The contractor shall submit a bid with the scope as defined in section 1.2 and detailed throughout the remainder of the documentation provided.

BASE BID –

• Replace and install CWP #2 new skid with new pump and new motor

• Rebuild pump and rebuild motor for CWP #1 and reinstall both

• Rebuild motor CWP #3 and reinstall ADD ALTERNATE #1 – Repair pump removed from CWP #2 and return to campus.

ADD ALTERNATE #2 – Repair motor removed from CWP#2 and return to campus.

1.4 Work requirements are detailed in the statement of work, attached drawings and specifications.

1.5 Note: It is imperative to note that every effort has been made to depict this work in the attachments; however, the content included is approximated. Interested parties are strongly encouraged to visit the site of the proposed work and review the existing conditions there relating to construction and labor, and to be fully informed as to the facilities involved, and the difficulties and restrictions that may affect the performance of the Contract. Failure to visit the site will not disqualify those submitting a proposal. However, change order requests for items that could have been reasonably ascertainable from a site visit (and included in a proposal) will be reviewed by the CO and evaluated accordingly.

2.0 CONTRACTOR REQUIREMENTS

2.1 Technical Requirements/Tasks:

The following are the current specifications for the pumps and motors. Photos 1 and 2 provide additional details. Pumps and motors shall be interchangeable between CWPs (i.e., require no modifications should parts need to be interchanged) and must be equivalent to the existing equipment, with the exception of using mechanical seals instead of stuffing boxes.

Pump Specifications:

- Weinman Split Case Pump.

- L-Series

- Pump size, 12L2

- Discharge, 12”

- Inlet, 12”

- Impel. Dia. 12.625”

- -Max HA, 28 ½”

- Max HB, 72”

- Max HC, 83”

- Max HM, 33”

- HO, 40”

- Note: Replacement for this pump must have mechanical seals.

Motor Specifications:

- Weg W21 Severe Duty Motor.

- HP – 200

- RPM – 1780

- V. – 460

- Hz. – 60

- PH. – 3

- Model # - 20018EP3GBB447T

Photo 1: CWPs in basement

Photo 2: CWP Motor Name Plate

In performing this work, the contractor shall:

2.1.1 Replace CWP #2 skid and verify operations before moving to CWP #1 motor and pump rebuilds. After operations are verified for CWP#1, contract may then move to CWP #3 motor rebuild.

2.1.2 Have ten working days to complete each pump or motor repair once it is taken out of service with an anticipated timeframe of 45 workdays or less to complete the work once onsite. The lead time for the proposed new skid should be provided in the bid documents.

2.1.3 Meet the requirements for skid assembly replacement:

2.1.3.1 Verify all necessary parts and tools are on hand to remove and reinstall the new skid assembly.

2.1.3.2 Verify power is locked out and all energy sources are at zero state.

2.1.3.3 Verify the CWP isolation valves are closed and holding by draining the CWP to the floor drain.

2.1.3.3.1 Leave hose connected to the CWP drain valve

and directed to floor drain for any leakage from the isolation valves.

2.1.3.4 Remove necessary insulation on the pump and pipe flange connections.

2.1.3.5 Remove existing skid assembly and turnover to owner.

Relocate to the owners desired location if necessary. (If one or both alternates are accepted, Contractor will use the pump and motor from this skid to rebuild per the alternate work requirement.)

2.1.3.6 If replacement pump and motor differ from original

specifications, then the inertia pad isolation springs must be adjusted to meet operational and manufacturer requirements.

2.1.3.7 Install and verify assembly once received.

2.1.3.8 Verify the motor and pump alignment has not changed

during shipping and realign if necessary.

2.1.3.9 Install new flange gaskets and new flange bolts to

reconnect new pump to existing flanges.

1.1.1.1 Reinsulate the pump and pipe fittings for the pump.

1.1.1.2 Fill the pump with chilled water and bleed all air out as needed. Wire motor leads to the motor.

1.1.1.3 Remove lockout and notify appropriate personnel including

COR.

1.1.1.4 Bump the motor to verify the rotation is correct as indicated on the CWP casting. If not, lockout the motor and switch one motor lead and test rotation again.

1.1.1.5 Work with COR to run the pump for a minimum of 24

hours to verify seals are not leaking and making final adjustments as needed.

1.1.2 Meet the requirements for motor repairs as follows:

1.1.2.1 Verify all parts and tools are on-hand to remove the motor.

1.1.2.2 Verify power is locked out and energy sources are at zero state.

1.1.2.3 Label motor power connections.

1.1.2.4 Disconnect motor power connections in the motor junction box.

1.1.2.5 Install wirenuts on the ends of the motor leads.

1.1.2.6 Remove motor coupler shield and store for reinstallation

1.1.2.7 Remove the motor flex coupler to turn over to COR

1.1.2.8 Remove motor mounting bolts and remove motor.

1.1.2.9 Move, load and transport motor off site for repairs.

1.1.2.10 Once off-site:

1.1.2.10.1 Replace motor bearings and seals on both ends.

1.1.2.10.2 Use a megohmmeter to check continuity phase

to phase and verify no continuity to ground.

1.1.2.10.3 Clean and recondition the motor inside and out

and apply new coat of paint, taking care to maintain all air passages for motor cooling.

1.1.2.10.4 Complete a dynamic balance of the motor and

correct balance as needed.

1.1.2.10.5 Remove and replace shaft grounding brush

assemblies and replace with new shaft grounding assemblies on both ends of the motor.

1.1.2.10.6 Load and transport the rebuilt motor back to

NCAH

1.1.2.11 Set in place.

1.1.2.12 Install motor mounting bolts.

1.1.2.13 Verify motor bearings have been properly greased.

1.1.2.14 Wire motor leads to the motor.

1.1.2.15 Remove lockout and notify appropriate personnel

including COR.

1.1.2.16 Bump the motor to verify the rotation is correct as

indicated on the CWP casting. If not, lockout the motor and switch one motor lead and test rotation again.

1.1.2.17 Lockout the motor and install a new flex coupler.

1.1.2.18 Reinstall the stored motor coupler safety shield.

1.1.2.19 Align the motor and pump assembly.

1.1.2.20 Work with COR to setup test run of the rebuilt

motor and CWP to verify operation for a minimum of 24 hours.

1.1.3 Meet the requirements for pump repairs as follows:

1.1.3.1 Weinman Pump parts shall be used to rebuild the pump.

1.1.3.2 Verify all necessary parts and tools are on hand to remove the pump.

1.1.3.3 Verify power is locked out and all energy sources are at zero state.

1.1.3.4 Remove coupler shield and store for reattachment.

1.1.3.5 Remove flex coupler and turn over to COR.

1.1.3.6 Verify the CWP isolation valves are closed and holding by draining the CWP to the floor drain.

1.1.3.6.1 Leave hose connected to the CWP drain valve

and directed to floor drain for any leakage from the isolation valves.

1.1.3.7 Remove necessary insulation on the pump and pipe

connections.

1.1.3.8 Remove flush lines between top pump casing and seal

assemblies on both sides.

1.1.3.9 Unbolt and remove the bearing cap on the end of the pump shaft.

1.1.3.10 Unbolt and carefully remove the top pump casing

for reinstallation after the CWP repair.

1.1.3.11 Carefully remove the pump shaft and support to

replace shaft sleeves, mechanical seal assemblies and all necessary pump components.

1.1.3.12 The shaft assembly may be replaced with new or

rebuilt onsite or offsite. If rebuilt:

1.1.3.12.1 Grease bearings and lubricate components as

necessary after shaft assembly is rebuilt.

1.1.3.12.2 Replace bearing and seal on the motor side of

the pump shaft.

1.1.3.13 Carefully reinstall the new or rebuilt pump shaft

assembly and verify all components are in proper position.

1.1.3.14 Install new pump casing gasket and the upper pump

casing.

1.1.3.15 Install bolts and properly torque the two pump

casings together.

1.1.3.16 Install new bearing and seal in bearing cap on the

end of the pump shaft and bolt in place.

1.1.3.17 Install flush lines between top casing and the seals on both sides of the pump.

1.1.3.18 Prepare and repaint the outside of the pump

assembly as needed without harming new bearings or seals.

1.1.3.19 Reinsulate the pump and pipe fittings for the pump.

1.1.3.20 Install flex coupler between the pump and motor.

1.1.3.21 Align the pump and motor assembly.

1.1.3.22 Fill the pump with chilled water and bleed all air

out as needed.

1.1.3.23 Work with COR to run the pump for a minimum of

24 hours to verify seals are not leaking and making final adjustments as needed.

1.1.4 Protect the surrounding equipment from dust, debris and damage during the duration of the project. Damage incurred during the course of the project shall be repaired at no expense to the owner.

1.1.5 Use dust control measures to capture dust with HEPA filtered vacuum capture system and use necessary measures to protect all surrounding structures and components for the duration of the work.

1.1.6 Clean all areas after completion of work with a HEPA filtered vacuum system and wipe down areas as needed to leave the space and equipment in a clean condition.

1.1.7 Clean up the work site daily, remove all debris from the site and recycle or dispose of debris in a responsible manner. Facilities staff must be able to access the space to perform maintenance work throughout the duration of the project.

1.2 General Requirements

1.2.1 The Contractor shall work with the USDA to verify methods and materials to repair and replace existing components in the pumps and motors.

1.2.2 The Contractor shall furnish all labor, materials, equipment, supplies, transportation, supervision, safety equipment*, and incidentals for all elements of the work to provide a complete and properly functioning installation in accordance with this Statement of Work.

* Note: Contractor is solely responsible for safety measures and conformance to applicable requirements in accordance with FAR clauses referenced in Solicitation package

1.2.3 The scope of the project shall be performed in a neat, workmanlike manner and shall be sequenced for efficient workflow and to minimize interruption to the daily activities and ongoing research at the facility to the greatest extent possible.

1.2.4 Contractor shall provide all means and methods to protect the facility and its installations from all project activities, including protecting the facility from environmental elements as the improvements are completed.

1.2.5 The Contractor shall submit a safety plan to the USDA no less than 10 days prior to the commencement of work.

1.2.6 The Contractor shall submit a quality control plan no less than 10 days prior to the commencement of work.

1.2.7 The Contractor shall site verify all dimensions and shall carefully examine the entire site and building and shall make all necessary investigations to become thoroughly aware of the existing conditions and all difficulties involved in the completion of the work in accordance with the contract documents prior to the submission of bid.

1.2.8 All work must be performed by qualified personnel.

1.2.9 Prior to commencing work, the general contractor shall provide proof that an OSHA certified “competent person” (CP) (29 CFR 1926.20(b) (2) will maintain a presence at the work site whenever the general or subcontractors are present.

1.2.10 Anything mentioned in the Scope of Work and not shown on the drawings or shown on the drawings and not mentioned in the Scope of Work, shall be of like effect as if shown or mentioned in both.

1.2.11 The finished product and all components shall provide a complete operational and functional system per this Scope of Work and the manufacturer’s specifications.

1.2.12 Waste Disposal:

1.2.12.1 Contractor shall divert project waste to recycle where practical.

The Contractor shall track and document the amount of project waste diverted to recycle. Documentation should be submitted at project closeout.

1.2.12.2 Contractor shall submit documentation on the amount of project waste diverted to recycle as part of project closeout. Contractor shall submit the type and amount of waste that was diverted to recycle, present information in a clear, typewritten format.

1.2.12.3 If no project waste is diverted to recycle, the Contractor shall submit a letter stating this and why diversion was not practical.

1.3 Special Provisions

1.3.1 Do not disturb portions of the site beyond areas in which the work is approved. If land is disturbed due to staging or other reasons, the contractor is required to return the condition back to pre-construction condition or better at no cost to the government.

1.3.2 Repair or replace portions of existing work which have been altered during construction operations to match existing or adjoining work, as approved by the Contracting Officer. At the completion of operations, existing work must be in a condition equal to or better than that which existed before new work started.

1.3.3 Keep driveways, entrances, walkways, and doorways serving premises clear and available to the Government, employees, visitors, and emergency vehicles at all times. Do not use these areas for parking or storage of materials.

1.3.4 Any damage resulting from the contractor’s operation shall be brought to the attention of the Contracting Officer's Representative immediately.

1.3.5 Finished surfaces of existing facilities that are affected, marred, scratched, or damaged by the contractor shall be refinished to match original condition.

1.3.5.1 Patching material shall be of the same type, style, and thickness, and shall be finished to match existing adjacent surface construction in color and texture.

1.3.5.2 Patching material, paint color, paint material and paint application methods shall be approved in advance by the Contracting Officer’s Representative.

1.3.6 No building structural members shall be cut or altered without prior approval of the Contracting Officer's Representative.

1.3.7 The contractor shall take all necessary and reasonable measures to keep the work site clean of trash and debris. Work areas shall be cleaned immediately as work in that area is completed, and before moving to a new work area. Place all trash and debris in OSHA approved containers, remove, and dispose of trash off site daily.

1.3.8 The contractor shall move all materials and equipment, including ladders and scaffolding from the site at the completion of each day's operation unless otherwise approved by the Contracting Officer's Representative.

1.3.9 The contractor shall provide proper safety equipment to workmen and ensure a safe environment for employees and the public at all times. The contractor shall work to ensure free, unobstructed, and safe access to and about the work area.

1.3.10 The Contractor shall ensure that any materials that are delivered by FedEx, UPS, etc. are delivered to the jobsite and NOT to the USDA warehouse dock at Building 24 or to the north warehouse, Building 11. The USDA and/or the COR will not be responsible for receiving any materials for the project. USDA reserves the right to refuse any unscheduled deliveries that arrive at either warehouse or at the main gate.

1.4 Product Specifications

1.4.1 Any basis-of-design products included in this SOW convey a specified standard of quality and salient characteristics desired but are not to be considered a single-source specification. It shall be the Contractor’s burden to furnish all documentation and / or samples to show equality with specified items. The owner’s decision on equality is final. Manufacturers / products that are submitted as “Approved Equal” are reviewed during the shop drawing process, not during bidding.

1.5 Regulatory Requirements

1.5.1 The equipment materials, installation, workmanship, and operation shall conform to the most stringent applicable requirements of the most recent editions of the associated publications, in the below section and in the attached specifications unless otherwise noted:

i. NFPA 5000 – Building Construction and Safety Code

ii. Underwriters Laboratories, Inc. (UL)

iii. Appropriate UL Standards

iv. State and Local Building Codes as adopted by the Authority

Having Jurisdiction (AHJ).

v. The Uniform Federal Accessibility Standards (UFAS)

vi. Occupational Safety and Health Administration (OSHA)

vii. ASHRAE 90.1

viii. ASME B16.21

ix. NFPA 70

2.0 INTENT OF CONTRACT DRAWINGS

2.1 Government provided drawings, henceforth referred to as “Contract Drawings”, do not attempt to show complete details that may affect the repairs. Government provided diagrams of proposed systems are for reference only and do not necessarily show physical arrangement of all equipment and/or maximum number of devices. Minimum system requirements are shown.

2.2 Drawings are shown diagrammatically only. The drawings do not necessarily show all structural components or all modifications to the structure.

3.0 WORK RESTRICTIONS & CONDITIONS

3.1 Site Security Access

A. This project construction site is located in the limited access zone.

B. Access to the construction site is controlled by a security fence and visitor/contractor check-in/check-out system. All contractor’s/subcontractor’s employees shall sign-in and out at the main entrance gate and always wear a contractor/visitor identification badge while on the site. The ID badges will be turned in at the end of each workday.

C. A minimum of 5 days of advanced registration is required for all personnel entering the site that are foreign nationals and 3 days for all other workers.

D. All personnel must have a real I.D. (gold star on state issued driver’s license) to enter the site.

E. Contractor vehicles will be allowed escorted access to the Building 24 loading dock to load and unload necessary tools and material for the repairs; contractor employee’s personal vehicles shall be parked in the facility parking lots as directed by the COR. Appropriate vehicle badges shall be displayed at all times while the contractor is on site.

F. The Contractor shall use only the service roads and access routes approved by the Contracting Officer’s Representative.

G. Unless accompanied by a NCAH/USDA employee, the Contractor, subcontractors, and their employees shall not enter buildings or facilities not specifically part of this project. Reasons included, but are not limited to, disease control and health requirements.

H. The Contractor shall adhere to all Site, ARS, APHIS and USDA security policies and procedures including, but not limited to, Code of Federal Regulations Requirements, Standard Operating Procedures, Security Directives, Security Procedures, General Orders, Post Orders and any applicable Government Policies and Procedures.

I. Additional security requirements may be imposed when the Federal Government raises the Homeland Security Alert Level. Additional directions will be provided if the situation occurs.

J. No pets or animals are allowed inside the Security Gate, even if left in a vehicle.

K. No firearms or weapons are allowed on site.

L. Failure to comply with access requirements shall be adequate grounds for the removal of the Contractor/subcontractor employees from the site and barring further site access to individuals.

M. Additional entry requirements may be added prior to the commencement of the project. The COR will advise of any updates during the project kickoff meeting.

3.2 Work Hours

Regular work hours for the site are 7:00am to 3:30pm, Monday through Friday, excluding Government holidays. Work outside regular work hours will not be allowed.

3.3 Project Timeline

Contractor shall be given 180 days from the “Notice to Proceed” to complete the project.

4.0 SUBMITTAL & SHOP DRAWINGS PROCEDURES

4.1 Submittal Register

At the beginning of the project, the Contractor shall provide a Submittal Register identifying all the items called out in the Specifications for submittal to the COR for approval. The Contractor shall update and maintain the Submittal Register to show the status of all required submittals.

Submittal register shall include:

Spec. Section 9900 SD-03 Paint product data SD-04 Paint sample

Spec. Section 15080 SD-03 General Material Adhesives Sealants Pipe insulation material

Spec. Section 15181 SD-03 Product Data Gaskets

Pumps – performance characteristics Mechanical seal assemblies Flex connector SD-10 – O&M information SD-11 – Pumps data package - repair parts list with part numbers, quantity required and description

Spec. Section 16050N Electric Motors – Performance characteristics and O&M information Grounding Rings – Performance characteristics and O&M information

4.2 Submittal Requirements

Format: There are no formal submittal transmittals or format for this project other than the requirement that the documents shall be submitted as PDF files, scanned, or created in documents that can be easily read when printed on 11x17 sheets. Exceptions for larger sheet sizes will be considered by the COR. Failure of the Contractor to provide legible submittals will be adequate grounds for rejection.

Identification: Submittals shall be labeled and marked for this project. The identification shall include Contractor/sub-contractor’s name, date of submittal, description of item, specification section, and details on product data that are marked clearly for this project.

4.3 Submittal Procedures

All submittals will be posted in PDF by the Contractor and sent to the USDA for review. This same submittal process will be used for RFIs, Change Bulletins, etc.

4.4 Approved Submittals

The approval/acceptance of submittals is not to be construed as a complete check. Approval or acceptance will not relieve the Contractor of the responsibility for any error which may exist.

5.0 RECORD DRAWINGS

5.1 Redline Drawings

During the construction period the Contractor shall keep an updated “redline” or “conformed” copy of the project drawings on the jobsite. The redline set shall include notes on changes, RFI responses, and other field notes. At the end of the project the Contractor shall electronically scan the redline drawings at full-size and in color and provide an electronic copy in PDF to the Owner along with the close-out documentation.

6.0 TEMPORARY FACILITIES

6.1 Utilities

The Contractor will be responsible for providing their own electrical power and fuel for the project if the two existing 20 Amp. 110V circuits for electrical power are not sufficient to operate Contractor Equipment.

USDA will provide water for the Contractor from a garden hose connection in the Building 20 Basement Mechanical Room 0104 as needed at no cost to the Contractor. The Contractor shall be responsible for making and removing any temporary utility connections.

6.2 Telephones

The Contractor shall equip all his foremen and work leaders with cell phones as necessary to coordinate the work effort. The Government will not provide any phone service for the project.

6.3 Construction Trailer

Will not be allowed for the Project.

6.4 Toilet Facilities

The Contractor shall be allowed to use toilet facilities in Building 20 where the work is being completed.

7.0 COORDINATION

7.1 The contractor shall coordinate all work with the Contracting Officer's

Representative.

7.2 The contractor shall submit an installation schedule for review and approval by the Contracting Officer's Representative within ten (10) days of task order award.

7.3 The contractor shall be solely responsible for coordinating work with all subcontractors and ensuring that all items of joint use in conjunction with installations are completed.

7.4 Contractor shall provide company Safety policy for review and approval by COR within 10 days of task order award.

8.0 WARRANTY DOCUMENTATION

8.1 Warranty List: Provide a 3-year warranty summary sheet in spreadsheet format with all the warranties listed by section, description, supplier, warranty contact, start date, end date. The warranty shall start at the completion of the project.

8.2 Warranty Copies: Provide the COR one signed & dated copy of all warranties for products and equipment installed on the project. An electronic (scanned) copy of the Warranty Binder in a PDF file shall be submitted with the final close-out documentation.

9.0 DELIVERABLES / SCHEDULE

Item No.

Deliverable

Objective

Due

1 Project Schedule Defining the responsibilities, timeline, risks, and milestones of contract objectives. Ref. Subtask 7.2

No later than ten

(10) business days after contract award

2 Contractor Safety Policy.

For review and approval by COR.

Ref. Sub Task 7.4

Ten (10) business days before starting work on site.

3 Material Submittal Defining the motors, pumps and their performance characteristics, seal assemblies, flex coupler and pump rebuild components parts list with part numbers and quantities, insulation and paint. Electric motors and grounding rings. Ref.

Sub Task 1.4

No later than ten

(10) business days after contract award

4 Warranty For review and approval by COR.

Ref. Sub Task 8.1 & 8.2

At completion of project.

END OF SECTION