SOW S24_085_12317_OilyWstTnks (Rev 0).pdf

S24_085_12317_MLA_1024_10

WORK ITEM 1: Tanks, Dirty Oil and Waste, Clean/Inspect

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to clean and inspect the following tanks to identify a leak between the two tanks listed in Table 1.

TABLE 1 – TANKS

TYPE OF TANK LOCATION *CAPACITY - 95%

(GALLONS)

CURRENT TANK

LEVEL (GALLONS)

Oily Waste 4-171-1-W 5868 2600

Dirty Oil 4-171-3-F 6988 4000

1.2 Government-furnished property.

None.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 400 WAGB 103-003, Rev AJ, Booklet of General Plans (POLAR STAR) Coast Guard Drawing 400-WAGB 2901-3, Rev E, Tank Capacity Tables – POLAR STAR Coast Guard Drawing 400-WAGB 5501-22, Rev A, RIP-Oily Water Hldg Tks & Waste Oil

Tanks Mods (POLAR STAR)

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2022, Welding and Allied Processes Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2022, Requirements for Preservation of Ship Structures

OTHER REFERENCES

Society of Automotive Engineers (SAE) Aerospace Material Specification (AMS) C6183, 2019, Cork and Rubber Composition Sheet; For Aromatic Fuel and Oil Resistant Gaskets Federal Specification (Fed Spec) QQ-N-281D(2), Oct 1985, Nickel-Copper Alloy Bar, Rod, Plate, Sheet, Strip, Wire, Forgings, and Structural and Special Shaped Sections

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep. The Contractor must provide the services of Marine Chemist/Gas Free Engineer to test and certify tanks are safe for worker in accordance with SFLC Std Spec 0000 3.3.1.2.

3.1.3 Protective measures. The Contractor must furnish and install all protective measures in accordance with SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.4 Interferences. The Contractor must 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:

• TLIs

• Piping

• Residual tank contents/fluids

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.2 Operational test, initial. Prior to commencement of work, the Contractor must witness Coast Guard Personnel perform an initial operational test of the equipment listed below to demonstrate existing operational condition. Submit a CFR.

• TLI’s for tank(s) listed in paragraph 1.1

3.3 Tank opening. The Contractor must remove the tank manhole cover(s) and ventilate the confined spaces in accordance with SFLC Std Spec 0000, Paragraphs 3.3.1.1 and 3.3.1.2. The Contractor must provide fall protection to cover tank manhole cover when opened for ventilation/work.

3.4 Tank content and waste disposal. The Contractor must dispose of tank contents and all cleaning fluids in compliance with all applicable Federal, state, and local laws, ordinances, and regulations. Document a complete chain of custody record of the removed tank contents and generated wastes, from the vessel to the point of final destination or delivery. Submit document to the COR upon completion of work. Current tank levels are shown in Table 1.

3.5 Temporary Plugs. The Contractor must plug all inlet and outlet piping in the tank to prevent contaminants from entering the tank. Use plugs with an attached lanyard, ring or other system that will ensure plugs are not lost in the pipe openings.

3.5.1 Plug Log. The Contractor must keep a written record of all installed plugs. Keep a separate list for each tank. Maintain a plug accountability log posted immediately outside the tank to prevent any of the installed temporary plugs from being lost inside the tank or left behind inside at tank closure. The log must include the type and size of each plug, installation date, and removal date. Submit this log to the COR after completion of work item via a CFR.

3.5.2 The Contractor must ensure that all plugs are removed from each tank upon completion of work in the tank.

3.6 Tank cleaning. The Contractor must clean all designated tank interior surfaces free of all foreign materials, such as residual oils, sediment, sludge, rust, or biological growth, taking care not to damage the coating system (if applicable).

3.6.1 The Contractor must accomplish all requirements of SFLC Std Spec 6310, 3.1.6.4 (Surface contaminant removal) to achieve the cleanliness requirements of SSPC-SP 1, including a low-pressure (maximum 5,000 psi) freshwater wash down of the surfaces.

3.6.2 Remove cleaning media and residues continuously from the tank during the washing process.

3.6.3 Reinstall both manhole covers between the tanks using new gasket material conforming to SAE AMS C6183. Chase threads on studs to ensure even installation of the access covers. Renew all stud cotton grommets (as applicable) upon reinstallation of manhole covers.

3.7 Leak check. The Contractor must conduct a hydrostatic test by filling 5-171-3-F with fresh water. In the presence of the Coast Guard Inspector, visually inspect the boundary between the two tanks to identify all leaks. Submit CFR with findings and recommended repairs.

3.7.1 The use of freshwater for hydrostatic testing is to reduce chloride contamination as there will likely be repairs and painting in the tank(s).

3.7.2 Upon test completion, dispose of test water in accordance with paragraph 3.4.

3.8 Post Repair Testing. The contractor must conduct a test of all repairs using the following methods from SFLC Std Specification 0740. Submit CFR with test results.

• B2.7.6 Visual Inspection

• B2.7.7 MT Inspection

• C2.2.5.4 Tank Hydrostatic Test by filling 5-171-3-F using seawater or freshwater.

3.8.1 If the manhole covers between the tanks were removed during repairs, reinstall in accordance with paragraph 3.6.3 prior to conducting the hydrostatic test.

3.9 Tank closing. The Contractor must ensure that the tanks remain open for at least 24 hours after completion of any authorized repair and preservation procedures (if applicable). Notify the COR at least 48 hours prior to closing the tanks.

3.9.1 After satisfactory inspection by the Coast Guard Inspector and completion of all authorized repairs, remove all installed temporary plugs and document removal via signature on the plug log by the Coast Guard Inspector and Contractor prior to tank closing.

3.9.2 Close all tank manhole covers with new gasket material conforming to SAE AMS C6183. Chase threads on studs to ensure even installation of the access covers. Renew all stud cotton grommets (as applicable) upon reinstallation of manhole covers.

3.9.2.1 Renew any damaged or non-monel nuts with Nickel-Copper alloy (monel) nuts meeting QQ-N- 281, Class A or B. The nuts and bolts shall be of different classes to prevent galling. Existing undamaged fasteners meeting this specification may be reused. If nylon insert/ nyloc nuts were previously being used, the contractor must renew 100% of the nylon insert/nyloc nuts.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.10 Operational test, post repairs. After completion of work and in the presence of the Coast Guard Inspector, the Contractor must thoroughly test and demonstrate the equipment listed below to be in satisfactory operating condition. Submit a CFR.

• TLIs

3.11 Touch-up preservation. The Contractor must prepare and coat all new and disturbed surfaces, and all manhole cover external surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, paragraph 3.1.13 (Touch-ups and minor coating repairs). Do not paint any manhole cover fasteners.

4. NOTES

4.1 General. The Contractor must conform to all requirements specified in SFLC Std Spec 0000 and in this item, as applicable, during the performance of this availability. The requirements of this WI apply to all work under the scope of this contract, whether explicitly stated in all following work items or not, and to all other work subsequently authorized by changes, modifications, or extensions to the contract.

4.2 Welding and brazing requirements. The Contractor must perform all welding and allied processes, and NDE in accordance with SFLC Std Spec 0740.

4.3 Fire Prevention Specification. The Contractor must submit a Fire Prevention Plan in accordance with paragraph 3.1 of SFLC Standard Spec 5550

4.4 Materials. The Contractor must obtain all of the materials required to complete this job with the exception of the Government-furnished Property shown in Paragraph 1.2 of Work Item 1.

4.5. Period of Performance. The period of performance for this work starts on 28 October 2024 and ends on 15 November 2024.

4.6. Location. The Contractor must perform the work while the USCGC POLAR STAR (WAGB-10) is alongside the pier at USCG Base Seattle: 1519 Alaskan Way S, Seattle, WA 98134.