SOW_RES_Sewage Piping Repair Flush.pdf

STATEMENT OF WORK (SOW)

PR801P45841

CGC RESOLUTE SEWAGE SYSTEM REPAIR AND ACID FLUSH

CLEANING

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to repair numerous sections of the sewage piping system on CGC RESOLUTE as well as perform a chemical flush and cleaning of the sewage system components and holding tank. Sewage piping is weak/thin, holes/split seams constantly found on vacuum and discharge side with serious calcium and other organic buildup throughout the system.

WORK TO BE ACCOMPLISHED: Chemically flush the black water piping and clean the black water holding tank until all visible calcium carbonate deposits, solid deposits and build up are removed from pipe and tank walls. Provide the services of a Marine Chemist to certify MSD tanks “Safe for men/hot work”. Renew up to 34 linear feet of 2” vacuum system piping, up to 12 linear feet of 3” vacuum system piping, up to 30 linear feet of 3” sewage discharge piping and up to 1.5 linear feet of 2” sewage discharge piping in the MSD space. All piping is 90/10 Cu/Ni. Renew flanges, 2 ea threaded bronze ball valves, elbows, couplings and tees. Additionally, contractor will be required to renew all gaskets and fasteners using 316 grade stainless steel.

1.2 Government-furnished property.

None.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 627 WMEC 593-001, Rev E, Sewage Transfer System

Coast Guard Drawing 627 WMEC 593-005, Rev B, Sewage Vacuum System Diagram

Coast Guard Drawing 627 WMEC 593-99, Rev F, Sewage Vacuum System Below Main Deck – A&D

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2018, General Requirements

Tech-Pub 3241A_593_A

OTHER REFERENCES

ASTM International (ASTM) D1330, 2015, Standard Specification for Rubber Sheet Gaskets

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

Not applicable.

3.1.3 Protective measures: The and install all protective coverings to seal off and protect all non-affected vessel's components, equipment, and spaces near the work area against contamination during the performance of work. Upon completion of work, remove all installed protective measures, inspect for the presence of contamination, and return all contaminated equipment, components, and spaces to original condition of cleanliness.

3.1.4 SAFETY PROBLEMS: Hot work poses a fire hazard. SF will provide 01 fire watch. MSD tanks must be certified gas free before cutting and brazing completed. Working with raw sewage is a health hazard and proper PPE must be worn.

3.1.5 Interferences. Sewage system will need to be secured and firemain flush performed on discharge piping prior to cutting/replacement of pipe. MSD tanks must be certified gas free before cutting and brazing completed. A/C units, cableway, chill water piping, and ventilation ducting in MSD will be interferences. The Contractor shall handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). Known interferences include, but are not limited to the below-listed:

Sewage pumps

Toilets

3.2 Contamination prevention. The Contractor shall take all precautions to prevent contamination of personnel and spaces in accordance with all applicable Federal, state, and local regulations.

3.3 Personnel qualification. The Contractor shall ensure that personnel accomplishing this work are qualified and experienced in operating the pressurized water system and handling the chemicals. For each operator/cleaning technician, submit documentation of applicable experience and training obtained within the last twelve months along with the Cleaning Plan.

3.4 Operational test, initial. Prior to commencement of work, the Contractor shall witness Coast Guard personnel perform an initial operational test of all items or shipboard devices to be disturbed, used, repaired, or altered, to demonstrate existing operational condition. Submit a CFR.

3.5 Cleaning plan. The Contractor shall establish a plan for cleaning the designated piping system, listing the step by step procedures necessary to ensure that all foreign debris is removed from the piping system.

CAUTION

Although the Coast Guard prefers pressurized water as the cleaning fluid, the Contractor may propose chemical cleaning as an alternative, providing that the proposed chemical cleaning agent is environmentally safe, suitable for use in marine sewage piping application, and pre-approved by the COR. The chemicals used in the cleaning (including cleaning chemicals, neutralizing compounds, and defoaming chemicals) shall not cause any significant detrimental effects to the sewage piping system or any other system components Due to the fact that system piping has historically been difficult to clean by pressure washing only, chemical cleaning is usually required to successfully complete the cleaning process.

Submit a MSDS to the COR for all chemicals proposed for use.

3.5.1 Procedure requirements. The Contractor shall ensure that the procedure includes the following:

Methods of cleaning.

All safety precautions required during cleaning operations.

List of qualified personnel who will operate machinery or handle chemicals (see paragraph

3.3 (Personnel qualification) herein).

Locations in the sewage piping where cleaning will take place, and any additional fittings necessary.

Sequence of each location that ensures all piping sections will be cleaned and all foreign debris removed.

3.5.2 Plan submittal. The Contractor shall submit the written plan to the COR for approval at least 48 hours prior to commencing cleaning operations.

3.6 Clean and flush. The Contractor shall clean and flush all sewage system piping, using references outlined in section 2: References.

3.6.1 Pumps and valves. Replace system tank valve(s) with temporary spool piece(s) before cleaning.

Visually inspect system pumps and valve(s); and submit a CFR. Upon completion of work, reinstall the removed tank valve(s) with new gaskets.

3.6.2 Cleaning. Continue cleaning until all of the following conditions are met:

All visible calcium carbonate deposits, solid deposits and build-up are removed from pipe walls.

Discharge water from the piping being cleaned is free of all visible scale and deposits.

3.6.3 Inspect the piping interior using a borescope in the presence of the COR, to verify that all solid deposits visible to the unmagnified eye have been removed. Continue the cleaning process until all visible solid deposits are removed from the pipe walls.

3.7 Waste disposal. The Contractor shall dispose of all cleaning fluids and debris in accordance with all applicable Federal, state, and local regulations. Remove all unused chemicals from USCG property immediately upon completion of work item. Do not drain any fluids (including fresh water) into any space, bilge, or exterior location.

3.8 Gasket renewal. The Contractor shall reinstall all removed valves and fittings with new gasket material conforming to ASTM D1330.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.9 Operational test, post repairs. After completion of work, the Contractor shall thoroughly test for vacuum leaks and perform operational test on discharge piping to the main deck shore tie, in the presence of the Coast Guard Inspector and demonstrate all items or shipboard devices that have been disturbed, used, repaired, altered, or installed to be in satisfactory operating condition and submit a CFR if required.

Any painting/preservation requirements to be completed by ships force.

3.9.1 Leak test. After all system components are reinstalled, the Contractor shall test all disturbed piping for leaks, as follows, and submit a CFR:

Plug all system openings (except the highest) and fill system with water to the point of overflow. Ensure that the water level does not go down (without adding any water) for sufficient time to inspect the entire system (no less than 15 minutes).

Closely monitor the system for leaks. Repair all leaks detected.

Repeat test and inspection until no leaks are detected.

3.10 Service disruption. When grey water and sewage systems are disrupted due to contractor repairs, the Contractor shall refer to SFLC Standard Spec 0000 par 3.2.11 to provide required temporary facilities.

4.0 ADMINISTRATION.

4.1 CONTRACTOR PERSONNEL

4.1.1 Qualified Personnel.

The Contractor shall provide qualified personnel and subject matter experts to perform all required tasks specified in this SOW.

4.1.2 Employee Conduct.

Contractor employees shall present a professional appearance and their conduct shall not reflect discredit upon the U.S. Government, and any involved Departments or Agencies.

4.1.3 Conflict of Interest.

The Contractor shall not employ any person who is an employee of the U.S. Government if that employment would, or would appear to cause, a conflict of interest. The Contractor shall take appropriate precautions as delineated in the Federal Acquisition Regulation (FAR) to preclude actual or apparent conflicts of interest.

4.2 PERIOD OF PERFORMANCE.

01 March 2021- 15 March 2021

4.3 PLACE OF PERFORMANCE.

CGC RESOLUTE

600 8th Ave. SE St. Petersburg FL. 33701 POC: LT Jonathon Upton

PH: 781-720-9769

Jonathon.f.upton@uscg.mil