Statement of Work (SOW).pdf

Statement of Work

2023 Water Tower Inspection

USDA, Ames, IA

February 7th, 2023

1.0 General Information

A. In Accordance with AWWA Standards, The USDA elevated water storage tank should be cleaned and inspected every three years. The storage tank was last cleaned and inspected in 2020.

B. The USDA elevated water storage tank is located at 1920 North Dayton Avenue in Ames, Iowa. It is of welded steel, double ellipsoidal construction with a 500,000-gallon capacity supported on eight columns. The elevated water storage tank was erected by the Pittsburg Des Moines Steel Company in 1958 and measures 139 feet and 7/8 inches to high water level with a 39 foot and 7/8 inches head range within the container.

C. In 2018, NCAH completed safety improvements that included adding non-slip ladder rung covers, installing a 24-inch diameter manway into the wet riser, and extending the 30-inch diameter sidewall manway and balcony platform.

Additional improvements included upgrading the vent, extending the overflow pipe down to grade, and adding bypass piping around the tower.

D. In 2019 the inside and outside of the water tower was recoated.

2.0 Scope of Work:

A. The contractor shall provide all services and material necessary for performance of the following task:

1. Coordinate between USDA staff and the cleaning and inspection crews for the water tower to be emptied. USDA requires 2 weeks’ notice prior to start of on-site work.

2. Complete a professional examination of the interior and exterior coating systems, foundations, structural members, and appurtenances in accordance with current American Water Works Association (AWWA) M42 “Steel Water Storage Tanks”, Occupational Safety and Health Administration (OSHA) 29 CFR General Industry Standards, National Association of Corrosion Engineers (NACE) International, Steel Structures Painting Council (SSPC) and Federal and State Homeland Security requirements.

3. Complete a written report of the inspection including documentation and photographs. Complete an evaluation of the inspection findings with regard to compliance with industry standards, safety regulations, and compliance with current AWWA Standards. The evaluation shall include a general ranking of any deficiencies identified in order of importance to the safety of the water and structure; including critical for the safety of the structure, code/standard compliance, and improvements to extend the life or reduce operating or maintenance cost.

4. Clean the vertical stand/fill piping and, if necessary, the interior of the water tower. Work will include opening the grade-level drain/inspection hatch on the standpipe and removing all accumulated settled material from the vertical piping.

If required, the tank interior shall be cleaned using only water and hand tools.

Any tools used inside the tower shall be disinfected prior to use. A power washer may be used if needed. The services shall include the collection and legal disposal of sludge cleaned from the water tower. Note: The tank interior was recoated in 2019 and is not expected to require cleaning. If light cleaning is required, then care must be taken to avoid damage to the new coating. No work shall be conducted that would void the existing coating warranty.

5. Following all cleaning and interior inspections, the interior and standpipes shall be disinfected in accordance with the most current version of AWWA C652 “Disinfection of Water Storage Facilities.” The disinfection procedure shall be approved by the Owner and/or COR prior to implementation. Disposal of disinfection rinsate will be coordinated with Owner and legally discharged into the site sanitary sewer.

6. Following disinfection and prior to placing the tank into service, no less than two

(2) bacteriologically safe samples must be collected 24 hours apart. If either sample fails, the tank must be disinfected again, and another two (2) samples drawn as described above. The samples shall be collected by the Contractor and sent to a testing laboratory as directed by the Owner and/or COR using containers obtained from the stated laboratory for that purpose. All costs will be paid by the Contractor. A copy of the sample results shall be provided to the COR for project documentation.

7. At the end of on-site work, the crews shall clean up all debris and material used by the crews on site and shall leave the work area in a clean, safe, and operable condition.

8. Coordinate with USDA staff to refill the water tower and return it to service.

C. Project Timeline:

Due to operational conditions on the USDA campus, this service may only be conducted in the spring from March 15th through May 15th, or in the fall from September 1st through October 31st. The service work must be completed within a three week timeframe starting at initial draining of the tank and ending once the water tower has passed disinfection tests, has been filled, and has been turned back over to the USDA to be placed into service.

3.0 Site Specific Requirements

3.1 Work Restrictions & Conditions

A. Site Security Access:

1. Access to the construction site is controlled by a security fence and visitor/contractor check-in/check-out system. All contractor/subcontractor employees shall sign-in and out at the main entrance gate and wear a contractor/visitor identification badge at all times while on the site. The ID badges will be turned in at the end of the work day. A current government-issued identification with a picture ID is required for entry.

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

3. Construction vehicles will be allowed access adjacent to the work; contractor employee’s personal vehicles shall be parked in the facility parking lots.

4. The Contractor shall use only the service roads and access routes approved by the Contracting Officer’s Representative (COR).

5. Work shall be confined to the areas identified on the Drawings. 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.

6. 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.

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

B. Work Hours: Regular work hours for the site are 7:00am to 4:30pm, Monday through

Friday, excluding Government holidays.

C. Work Outside Regular Work Hours: Work scheduled outside regular work hours including late hours, Saturdays, Sundays, and Government holidays requires Contracting Officer’s Representative (COR) approval in advance. Make application to the COR at least 5 calendar days prior to such work to allow arrangements to be made by the Government for access to the work area and inspection & monitoring arrangements. Requests shall include the exact dates, hours, location, and purpose of the exception. If approved, the COR will coordinate access with the site security office.

3.2 Quality Control Requirements

A. The Contractor shall maintain a Construction Quality Control (CQC) Plan for the project that is generally in conformance with the Corp of Engineers (COE) Quality Control process.

B. The Contractor’s CQC Plan manager shall be trained in the COE system and shall maintain the project CQC Plan records and documents.

3.3 Confined Space Program

A. The Contractor and/or subcontractor employees who will be entering Confined Spaces shall be adequately trained and equipped for access and extraction. The Contractor shall provide all ventilation equipment, air quality monitoring, harnesses, and other safety equipment as appropriate for OSHA compliance. The Contractor’s Confined Space program shall substantially conform to the NCAH plan.

B. The Contractor shall submit a written copy of their plan(s) for acceptance by the COR prior to entry into any confined spaces.

3.4 Temporary Facilities

A. Utilities: The existing USDA utilities at the site may be used by the Contractor for completion of the contract work at no cost to the Contractor. The Contractor shall be responsible for making and removing any temporary utility connections.

B. 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 to the project.

C. Toilet Facilities: A temporary toilet facility shall be provided by the contractor.

3.5 Close-Out Submittals

A. Contractor shall provide final reports as required by Section 2.0.

3.6 Special Provisions

A. The Contractor shall confine all operations to within the work limits of the project and exercise special care to maintain natural surroundings undamaged. All surfaces that have been altered for the installation shall be refinished to match original condition by skilled personnel of the trades involved at no additional expense to the Government.

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

a. 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.

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

c. Any damage to the interior coating of the water tower must be repaired by an authorized agent to maintain the existing coating warranty.

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

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

E. 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 site. Place all trash and debris in OSHA approved containers, remove, and dispose of trash off site daily.

F. 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.

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

H. Equipment, materials, installation, workmanship, and operations shall conform to the most stringent applicable requirements of the most recent editions of the associated publications listed below and in any attached specifications, unless otherwise noted:

a. National Fire Protection Association (NFPA)

b. NFPA 101 – Safety to Life from Fire in Buildings and Structures.

c. NFPA 1 – Uniform Fire Code

d. NFPA 5000 – Building Construction and Safety Code

e. Underwriters Laboratories, Inc. (UL)

f. Appropriate UL Standards

g. State and Local Building Codes as adopted by the Authority Having Jurisdiction

(AHJ).

h. The Uniform Federal Accessibility Standards (UFAS)

i. Occupational Safety and Health Administration (OSHA)

END OF SECTION