Clean and Inspect Sewage Holding Tank Grey Water Piping and Sewage Piping SOW.doc

USCGC CHENA (WLR-75409) DRYDOCKING AVAILABILITY, 1996

4-Dec-24

CLEAN, FLUSH AND INSPECT SHIPBOARD SEWAGE SYSTEMS

This work item describes the requirements for the Contractor to clean and inspect the vessel’s sewage hold tank (work item 1), clean and flush vessel’s grey water piping system (work item 2) and clean and flush vessel’s sewage piping system (work item 3).

Project Manager:

Mr. James Tepen Industrial Detachment Supervisor* Office (314) 771-6044 x 2103

Cell (314) 565-8893 Fax (314) 771-6269 *Visits for possible estimates must be scheduled with the Industrial Detachment Supervisor Project Location: CG Schlimme Industrial Facility 100 Arsenal Street

Building 17

St. Louis, MO 63118 Location Work Hours:

0700 – 1500 (All work outside of these hours requires advanced approval from the Project Manager) Vessel: USCGC OBION (WLR 65503) Homeport: Owensboro, KY

POC: MKC Corey Walters or Cutter Representative (270) 685-0650*

*Visits for estimates must be scheduled with POC.

Item Start Date: 3 Feb 2025 Item Completion Date: 13 Feb 2025 Note: Work MUST begin on start date unless otherwise coordinated with project manager.

Note: Contractor shall provide tools and equipment to include water hoses and drain camera WORK ITEM 1: Sewage Holding Tank(s), Clean and Inspect – Tender

1. SCOPE

1.1. Intent. This work item describes the requirements for the Contractor to clean and inspect the following tank(s):

TABLE 1 – TANKS

1.2. Government-furnished property.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 65 WD 4808-2, Rev 5, Secondary Drainage System (65504) Coast Guard Publications

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements

Other References

ASTM International (ASTM) D1330, 2010, Standard Specification for Rubber Sheet Gaskets

3. REQUIREMENTS

3.1.5 General.

3.1.1 CIR

None

3.1.2 Tech Rep

Not Applicable

3.1.3 Protective measures. The Contractor shall furnish 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, the Contractor shall remove all installed protective measures, inspect for the presence of contamination, and return all contaminated equipment, components, and spaces to original condition of cleanliness.

3.1.3.1 Plug all inlet and outlet piping in the tank(s) to prevent contaminants from entering. Use plugs with an attached lanyard, ring or other system that will ensure plugs are not lost in the pipe openings.

3.1.4 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 following:

· Pumps

· Piping

3.1.5 Plug log. The Contractor shall keep a written record of all plugs used in tank vents and sewage piping. Keep a separate list for each tank.

3.1.5.1 Verify removal of all plugs after completion of tank cleaning.

3.1.5.2 The plug log shall be available to the Coast Guard Inspector performing his/her closeout tank inspection.

3.2 Operational test - initial. Prior to commencement of work, the Contractor shall witness Coast Guard personnel perform an operational pre-test to demonstrate all tank TLIs' existing operational condition. Submit a CFR.

NOTE

Ship’s Force will operate all shipboard machinery and equipment.

3.3 Confined Space Entry. A confined space entry permit is required to open sewage holding tanks. Contractor shall be responsible for the confined space entry permit from a Certified Marine Chemist.

Marine Chemist of St. Louis

Ryan Ball

30213 Mitchell Creek Rd.

Brighton, IL 62012

(618) 616-7699 rwball709@gmail.com

3.4 Cleaning and inspection requirements. The Contractor shall accomplish the following for the tank(s) listed in paragraph 1.1 (Intent), referring to Coast Guard Drawing 65 WD 4808-2, Rev 1, Secondary Drainage Sys for guidance:

3.4.1 Content removal. Remove and dispose of all contents, fluids, and/or residues in accordance with all applicable Federal, state, and local regulations. The contractor shall provide a sewage vacuum truck to pump contents from the sewage holding tank.

3.4.2 Tank Opening. Contractor shall remove manhole cover(s) being careful not to break bolts or studs and contact the Project Manager for difficult to remove hardware. Contractor shall provide all tools and equipment to remove manhole cover(s).

3.4.3 Cleaning requirements. Clean all tank structure’s interior surfaces free of all foreign materials, sediment, and sludge. Remove all persistent residues, taking care not to damage the tank coating system. Remove cleaning media and residues continuously from the tank during the washing process. Remove any residual wash media and wipe up residual moisture with clean lint-free cloths. Collect, contain, and dispose of all wash media, residues, and cleaning materials in accordance with all Federal, state, and local regulations. Clean all tank vent lines. Remove and clean the eductors and level switches inside of the tank(s). Reinstall the eductors and level switches upon completion of tank cleaning. Use new gaskets and hardware to install/reinstall all removed/disturbed components.

3.4.4 Inspection. Visually inspect all interior surfaces, including, but not limited to bulkheads, floor and overhead plating, structural members, manhole cover surfaces, fasteners and gasket seating surfaces. Drain camera inspect tank inlet and outlet piping. Submit a CFR including the following, as applicable:

· Tank structural condition.

· Inaccessible areas.

· Condition of tank coating, including measurements taken, percentage, location, and type of coating failure.

· Suction and discharge piping and vent line condition.

· Fastener material (stainless steel) and condition.

NOTE:

The Contractor MUST contact the Project Manager or the Cutter POC for the tank level indicator (TLI), vacuum and/or float switch and control panel inspections prior to closing the sewage tank

3.5 Tank Closing. The Contractor shall notify the COR at least 24 hours prior to closing the tank(s). After satisfactory inspection by the Coast Guard Inspector, and completion of all authorized repairs, close the manhole cover(s) with new gasket material conforming to ASTM D1330 and new hardware being careful not to break bolts or studs.

3.6 Operational test – post repairs. After completion of work, the Contractor shall accomplish the following in the presence of the Coast Guard Inspector and submit a CFR.

NOTE

Ship’s Force will operate all shipboard machinery and equipment.

3.6.1 Upon completion of testing and, in the presence of the Coast Guard Inspector, pump tank(s) to the limit of the ship’s installed pumps.

4 QUALITY ASSURANCE

4.1 Certification and Compliance. Contractor shall comply with EPA certifications and provide a copy of current certification to the Coast Guard. In addition, contractor shall comply with all federal, state, and local public safety and environmental protection regulations applicable to the following issues:

· Handling and disposal of spent cleaning solvents and wastes generated during cleaning procedures

· Protection of waterways during cleaning procedures WORK ITEM 2: Grey Water Piping, Clean and Flush

1. SCOPE

1.1. Intent. This work item describes the requirements for the Contractor to clean the grey water piping system.

1.2. Government-furnished property.

None

2. REFERENCES

Coast Guard Drawings

Coast Guard Drawing 65 WD 4808-002, Rev 5, Secondary Drainage Sys (65504) Coast Guard Publications

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements

Other References

ASTM International (ASTM) D1330, 2010, Standard Specification for Rubber Sheet Gaskets DOD-STD-2187, Department Of Defense Standard Practice: Chemical Cleaning of Salt Water Piping Systems (20-AUG-1987) [Supersedes MIL-C-18159A]

3. REQUIREMENTS

3.1. General

3.1.1. CIR.

None

3.1.2. Tech Rep.

Not applicable.

3.1.3. Protective measures. The Contractor shall furnish 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, the Contractor shall remove all installed protective measures, inspect for the presence of contamination, and return all contaminated equipment, components, and spaces to original condition of cleanliness.

3.1.3.1. Protect non-affected vessel’s equipment, components, and spaces during surface and coating application procedures as specified in SFLC Std Spec 0000 paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.3.2. Abide by all applicable environmental protection agency regulations, as specified in SFLC Std Spec 0000 Appendix A, (Requirements for Environmental Protection).

3.1.4. 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 following:

· Grey water pumps.

NOTE

Ship’s Force will operate all shipboard machinery and equipment.

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 (see paragraph 3.5.2 (Plan Submittal)).

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 Piping chemical cleaning. The Contractor shall perform the following work:

3.5.1 The Contractor shall clean and flush the entire grey water system piping, shown on Coast Guard Drawing 65 WD 4808-2, Rev 1, Secondary Drainage Sys.

3.5.2 Prior to commencing work, coordinate with the Coast Guard Inspector. Determine required down times for affected piping system. Determine the feasibility/need for the piping system to be split to minimize system down time.

3.5.3 With the aid of ship’s force, split the plumbing drain system fore and aft by closing isolation valves in the drainage system. Work on only one section of the plumbing drain system at a time to allow use of toilet and shower facilities in the other section of the system by the ship’s duty section.

3.5.4 Using the referenced Coast Guard drawings as guidance, chemical clean the internal surfaces of all the plumbing drain piping.

3.5.4.1 Ship’s force will provide an assistant to the Contractor to show the Contractor the location of clean-out connections within the plumbing drain system.

3.5.4.2 Open each of the clean out connections as required to clean and chemical clean all the internal piping within the system. Catch any fluid that drains from the clean out connections when it is opened and clean up any spills using bleach to disinfect the spill after cleaning.

3.5.4.3 It may be necessary for the Contractor to install additional clean-out connections to access all portions of the plumbing drain system. If additional clean-out connections are needed, a separate specification item in this specification package shall be authorized to install additional clean-out connections.

3.5.4.4 Chemical cleaning water may be collected in the ship’s sewage system and disposed of via the ship’s sewage shore tie connections.

3.5.5 Clean until all 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.

3.5.5.1 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.

3.5.6 Ensure that chemical cleaners do not damage the environment, heat exchanger or the vessel.

3.5.6.1 Submit the written plan for chemical cleaning to the COR for approval. The procedure shall include products to be used, safety precautions, disposal requirements, sequence of events, etc.

3.5.6.2 Chemical cleaning wastewater disposal. 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.

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

· Flush twice the volume of the system cleaned with water to include 3 repeated pH tests between 6 and 8. The flushing water shall be collected in the ship’s sewage system and disposed of via the ship’s sewage shore tie connections.

3.6 Pumps and valves. The Contractor shall replace system tank valve(s) with temporary spool piece(s). Visually inspect system pumps and valve(s); and submit a CFR. Upon completion of work, reinstall the removed tank valve(s) with new gaskets. Grey water pumps to remain in place and isolated during cleaning operations.

3.7 Gasket renewal. The Contractor shall reinstall all removed valves and fittings with new gasket material conforming to applicable referenced drawings.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.8 Operational test – post repairs. After completion of work, the Contractor shall thoroughly test, 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. Submit a CFR.

3.8.1 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.

WORK ITEM 3: Sewage Piping, Clean and Flush

1. SCOPE

1.1. Intent. This work item describes the requirements for the Contractor to clean the sewage piping system.

1.2. Government-furnished property.

None

2. REFERENCES

Coast Guard Drawings

Coast Guard Drawing 65 WD 4808-002, Rev 5, Secondary Drainage Sys (65504) Coast Guard Publications

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements

Other References

ASTM International (ASTM) D1330, 2010, Standard Specification for Rubber Sheet Gaskets DOD-STD-2187, Department Of Defense Standard Practice: Chemical Cleaning of Salt Water Piping Systems (20-AUG-1987) [Supersedes MIL-C-18159A]

3. REQUIREMENTS

3.1. General. The Contractor shall clean and flush the entire sewage system piping shown on Coast Guard Drawing Coast Guard Drawing 65 WD 4808-005, Rev 1.

3.1.1. CIR.

None

3.1.2. Tech Rep.

Not applicable.

3.1.3. Protective measures. The Contractor shall furnish 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. 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

· Urinals

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 (see paragraph 3.5.2 (Plan Submittal)).

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.

NOTE

Ship’s Force will operate all shipboard machinery and equipment.

3.5. Cleaning plan. Submit the written plan for chemical cleaning to the COR for approval 96 hours before work is to commence. The procedure must include products to be used, safety precautions, disposal requirements, sequence of events, etc. Submit a MSDS to the COR for all chemicals proposed for use. Changes to the chemical cleaning plan as written, need to be approved by the COR (and Facilities).

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 conforms to DOD-STD-2187 (where applicable), is environmentally safe, and pre-approved by the COR. 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. Changes to the chemical cleaning plan as written, need to be approved by the COR (and local Facilities).

CAUTION

The Contractor shall be aware multiple turns and elbows are present in piping system which may hinder cleaning and/or inspection operations. The Contractor shall install additional access points as necessary. Include anticipated access points in plan submittal (see paragraph 3.4.2).

3.6. Clean and flush. The Contractor shall clean and flush the entire sewage system piping shown on Coast Guard Drawing 65 WD 4808-002, Rev 1, Secondary Drainage Sys.

3.6.1. Pumps and valves. Replace system tank valve(s) with temporary spool piece(s). 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 the following conditions are met:

· Removal of all visible calcium carbonate deposits, solid deposits and build-up from pipe walls is complete.

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

3.6.2.1 Ship’s force will provide an assistant to the Contractor to show the Contractor the location of clean-out connections within the plumbing drain system.

3.6.2.2 Open each of the clean out connections as required to clean all of the internal piping within the system. Catch any fluid that drains from the clean out connections when it is opened and clean up any spills using bleach to disinfect the spill after cleaning.

3.6.2.3 It may be necessary for the Contractor to install additional clean-out connections to access all portions of the plumbing drain system.

3.6.3. Inspection. Inspect the piping interior using a drain camera 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 removal of all visible solid deposits from the pipe walls is complete.

3.6.4. Flush twice the volume of the system cleaned with water to include 3 repeated pH tests between 6 and 8. The flushing water shall be collected in the ship’s sewage system and disposed of via the ship’s sewage shore tie connections.

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 The Contractor shall renew all disturbed gaskets with new gasket material conforming to ASTM D1330 and renew all disturbed hardware.

NOTE

Ship’s Force will operate all shipboard machinery and equipment.

3.9. Operational test – post repairs. After completion of work, the Contractor shall thoroughly test, 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. Submit a CFR.

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 there are no leaks detected.

4. QUALITY ASSURANCE

4.1. Certification and Compliance. Contractor shall comply with EPA certifications and provide a copy of current certification to the Coast Guard. In addition, contractor shall comply with all federal, state and local public safety and environmental protection regulations applicable to the following issues:

· Handling and disposal of spent cleaning solvents and wastes generated during cleaning procedures

· Protection of waterways during cleaning procedures

5. SAFETY

5.1 All persons conducting business with or at the Coast Guard Industrial Support Activity (ISA) St. Louis Facility and onboard Coast Guard Cutters while moored at this facility are required to meet all applicable safety requirements including weather conditions set forth by the Coast Guard Industrial Facility and the Army Corps of Engineers.

SEWAGE AND GREY WATER SYSTEM CLEANING CONTRACTORS

Industrial Production Detachment Saint Louis, MO

ABBCO Plumbing

Phone: (636) 250-3221

5096 Blase Station Rd

POC: Craig Beckmann

Saint Charles, MO 63301

EMAIL:

Pipe Solutions

Phone:

(636) 856-8989

210 South Linn Ave.

POC:

Wentzville, MO 63385

EMAIL: office@pipesolutions.com St. Louis Sewer & Drain Cleaning

Phone: (314) 830-0867 Mercury Drive

POC:

Florissant, MO 63031

EMAIL: service@stlsewercleaning.com Gateway Sewer and Drain Inc.

Phone: (314) 849-7300

11070 Gravois Industrial Court

POC:

St. Louis, MO 63128

EMAIL: service@gsd-stl.com

(Rev-0)