WAESCHE TANK CLEANING AND INSPECT

This is to be awarded lowest price technically acceptable General Requirements 1. SCOPE? 1.1 Intent. This standard specification invokes general requirements for conducting vessel repairs performed by commercial contractors at a Coast Guard facility for Coast Guard vessels.? 2. REFERENCES? COAST GUARD DRAWINGS? None.? COAST GUARD PUBLICATIONS? Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements? OTHER REFERENCES? None. 3. REQUIREMENTS? 3.1 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.? 3.2 Period of Performance. The period of performance for this work is 10MAR2025-28MAY2025 3.3 Location. The Contractor must perform the work while the USCGC WAESCHE is alongside the pier at U.S. Coast Guard Base Alameda, Coast Guard Island, Alameda CA 94501. 12314_MLA_1224_418 ITEM 1: Tanks (Potable Water), Clean and Inspect 1. SCOPE 1.1 Intent. This work item describes the requirements for the Contractor to clean and inspect the following tank(s): table 1 - List of tanks TYPE OF TANK LOCATION CAPACITY - 95% (gallons) Tank Content Disposal (gallons) Potable Water 3-68-3-W 5,916 311 Potable Water 3-68-4-W 5,916 311 1.2 Government-furnished property. None. 2. REFERENCES Coast Guard Drawings Coast Guard Drawing 418A-WMSL-801-001, Rev A, Booklet of General Plans Coast Guard Drawing 750-WMSL-085-022, Rev B, Tank Sounding and Moment of Inertia Tables (ASC085013B) (WMSL 751) Only Coast Guard Drawing 750-WMSL-100-37, Rev H, Unit 3120 Structure - 1st Platf to 2nd Dk - Fr 64 to Fr 76 (ASC100312) Coast Guard Drawing 750-WMSL-167-001, Rev J, Manhole List Installation and Fabrication Details Ship Wide (ASC167001) Coast Guard Drawing 750-WMSL-530-001, Rev G, Potable Water Systems Diagram (ASC530001) Coast Guard Drawing 750-WMSL-530-019, Rev E, Potable Water Unit 3120 (ASC530312-PW) Coast Guard Publications Commandant Instruction Manual M5100.47 (COMDTINST M5100.47 (series)), Safety and Environmental Health Manual 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, Requirement for Preservation of Ship Structures Other References American National Standards Institute/American Water Works Association (ANSI/AWWA) C652, 2019, Disinfection of Water-Storage Facilities The Society for Protective Coatings (SSPC) Surface Preparation Specification No.1 (SSPC-SP 1), 2016, Solvent Cleaning 3. REQUIREMENTS 3.1 General. 3.1.1 CIR. The Contractor must submit a CIR for the inspections listed in the following paragraph(s): - 3.7 Inspection 3.1.2 Tech Rep. None 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: Fluid contents Piping RO system components Deck grating 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. Test each tank TLIs to demonstrate that each radar head/sensor is functional (i.e., Digital readout is displayed). Ensure that there is interface/communication between the TLI sensor and the Machinery Control and Monitoring System (i.e. Digital readout at the TLI is identical to that displayed). Potable Water Pumps 3.3 Tank Opening. The Contractor must open and ventilate the confined spaces in accordance with SFLC Std Spec 0000, paragraph 3.3.1.1 (Temporary ventilation) and 3.3.1.2 (Confined or enclosed space entry and hot work). 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 residual tank contents listed in Table 1 and any cleaning fluids in compliance with all applicable Federal, state, and local laws, ordinances and regulations. Notify the COR (in writing) at least 48 hours prior to removal of wastes and fluids. 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 chain of custody record to the COR upon completion of work. 3.5 Temporary plugs. The Contractor must plug all inlet and outlet piping in the tank to prevent contaminants from entering the tank or piping system. 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 water, 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 when possible. 3.6.2 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. Wipe the interior tank structure dry and free of all cleaning agents. 3.7 Inspection. The Contractor must visually inspect all tank interior surfaces, including, but not limited to bulkheads, floor and overhead plating, structural members, manhole cover surfaces, fasteners and gasket seating surfaces. Submit a CIR with a description of the following, as applicable: Tank structural condition. Manhole and cover condition. Ladder condition (if applicable). Condition of tank coating, including dimensions, percentage, location, and type of coating failure. Tank level indicator (TLI) and/or float switch condition. Sounding/vent tube and striker plate condition. Suction and discharge piping condition. Fastener material and condition. Zinc anode condition (if applicable) Pit measurements Ultrasonic thickness (UT) measurements Suction and discharge piping condition Inaccessible areas (if applicable) 3.7.1 Pit measurements. The Contractor must measure 100 pits within each tank/location listed in Table 1, in accordance with SFLC Std Spec 0740, Paragraph 3.13 (Evaluation of pitting corrosion). The results of these measurements must be included in the inspection report, showing where pit measurements were taken and the depth of the pit. 3.7.2 Ultrasonic thickness (UT) measurement. The Contractor must take UT measurements in the surrounding area of any pit measuring greater than 25% of plate thickness. UT measurements must be taken in the four quadrants at an equal-distant radius from the pit center until full plate thickness is measured. For bidding purposes, assume 200 UT measurements per tank listed in Table 1. UT measurements must be conducted in accordance with SFLC Std Spec 0740, Appendix C, using Coast Guard Drawing 750-WMSL-100-37 as guidance. The results of these measurements (original thickness, measured thickness, and any observed cracks) and the locations where they were taken must be included in the inspection report. 3.8 Substrate fairing and repair by filling Epoxy for shallow pits and small corrosions (i.e. pits < 25% or corrosions < 25%). As designated by the COR, the Contractor must repair small pin holes, shallow pitted substrates (with remaining plate thicknesses over 75% of required plate thicknesses), and fair corroded substrates (with remaining cross sections over 75% of required cross section areas), after removing coating in accordance with SFLC Std Spec 6310 and manufacturers instructions. Procure 2 kits of Epoxy Fairing Compounds (e.g. Belzona 1111, 0.5 Gallon/5 Kg Kit or equivalent) to conduct repairs. Turn over all unused kits to the COR. 3.8.1 Ensure the filling epoxy is compatible with drinking water. NOTE - Substrate fairing and repair by filling Epoxy for shallow pits and corrosions (i.e. pits < 25% or corrosions < 25%) is a supplement barrier intending to help delay penetration. 3.9 Disinfection Preparations. In preparation for disinfecting the potable water tank, the Contractor must accomplish the following tasks: 3.9.1 The Contractor must notify the COR of their intention to disinfect the tank 5 days ahead of time. 3.9.2 Upon completion of all inspections, repairs, coatings and cure times, the Contractor must leave the tank open for 24 hours 3.9.3 Once 24 hours has elapsed, the Contractor must 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. Submit a CFR with the completed plug log. 3.9.4 Conduct a final inspection in the presence of a Coast Guard Inspector to ensure that no foreign objects or plugs have been left in the tank. Submit a CFR documenting this final inspection. 3.9.5 Ensure that no foreign objects enter the tank between the final inspection and the tank disinfection. 3.9.6 The Contractor must verify with the ship's Health Services Technician or Medical Liaison, or a Contractor supplied Marine Chemist, that water supplied for disinfection process meets all USCG requirements for consumption per COMDTINST M5100.47 Chapter 25. 3.10 Tank disinfecting. The Contractor must disinfect and treat the affected potable water tank(s) and associated disturbed piping and components, as necessary, to meet or exceed the requirements of AWWA C652. 3.10.1 Any of the three methods of chlorination listed in Section 4.3 of AWWA C652 is acceptable, but if Method 1 is utilized, then the retention period must be 24 hours. 3.10.2 Appendix B of AWWA C652 shows the chlorine doses for a variety of disinfection methods. 3.10.3 Remove and dispose of disinfection fluids and flushing water in accordance with Paragraph 3.4. Ensure that no one enters the tanks once disinfection is completed. 3.10.4. Tank closing. At the earliest opportunity during the disinfection process, the Contractor must close the tank manhole cover(s) using new gasket material in accordance with Coast Guard Drawing 750-WMSL-167-001. Chase threads on studs to ensure even installation of the access covers. Renew all nuts, washers, and cotton grommets (including those that are missing) in accordance with Coast Guard Drawing 750-WMSL-167-001. 3.10.5 Ship's force will refill the tanks with potable water upon completion of disinfection and flushing process. NOTE Coast Guard personnel will operate all shipboard machinery and equipment. 3.11 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. Test each tank TLIs to demonstrate that each radar head/sensor is functional (i.e., Digital readout is displayed). Ensure that there is interface/communication between the TLI sensor and the Machinery Control and Monitoring System (i.e. Digital readout at the TLI is identical to that displayed). Potable Water Pumps 3.12 Water quality verification. The Contractor must conduct halogen residual, pH, and bacteriological testing of the water system for consumption at the point-of-use (sinks, water fountains, etc) and verify with ship's Health Services Technician, Medical Liaison, or Marine Chemist that potable water meets all USCG requirements per COMDTINST M5100.47 Chapter 25. The Contractor must clean the tank until the water passes these tests. Submit CFR. 4. NOTES This section is not applicable to this work item. 63110_MLA_1224_418 ITEM 2: Tanks (Potable Water), Preserve (Partial) 1.1 Intent. This work item describes the requirements for the Contractor to prepare and coat 33% of the surfaces of the following tank(s): Table 1 - List of tanks location TYPE TOPCOAT color PRESERVE LEVEL 3-68-4-W Potable Water Match Existing Partial 3-68-3-W Potable Water Match Existing Partial 1.2 Government-furnished property. None. 2. REFERENCES Coast Guard Drawings Coast Guard Drawing 418A-WMSL-801-001, Rev A, Booklet of General Plans Coast Guard Drawing 418A-WMSL-530-001, Rev C, Potable Water Systems Diagram Coast Guard Drawing 750-WMSL-085-022, Rev B, Tank Sounding and Moment of Inertia Tables (ASC085013B) (WMSL 751) Only Coast Guard Drawing 750-WMSL-100-37, Rev H, Unit 3120 Structure - 1st Platf to 2nd Dk - Fr 64 to Fr 76 (ASC100312) Coast Guard Drawing 750-WMSL-167-001, Rev J, Manhole List Installation and Fabrication Details Ship Wide (ASC167001) Coast Guard Drawing 750-WMSL-530-019, Rev E, Potable Water Unit 3120 (ASC530312-PW) Coast Guard Publications Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2022, Requirements for Preservation of Ship Structures Surface Forces Logistics Center Standard Specification 8636 (SFLC Std Spec 8636), 2022, Temporary Hull Accesses Other References The Society for Protective Coatings (SSPC) Surface Preparation Specification No.11 (SSPC-SP 11), 2016, Bare Metal Power Tool Cleaning 3. REQUIREMENTS 3.1 General. 3.1.1 CIR. None. 3.1.2 Tech Rep. The Contractor must provide the services of a Qualified Technical Representative to accomplish the following on site: Serve as an Independent Coating Tech Rep. Provide the services of an AMPP Certified Coating Inspector (NACE CIP Level 2) with Marine Coating Inspection Specialty.. Accomplish applicable requirements in SFLC Std Spec 0000, Paragraph 3.2.4.2.2 (Coating Tech Rep). Oversee the Preservation Plan requirements in SFLC Std Spec 6310, Paragraph 3.2 (Preservation Plan). Review and sign daily reports summarizing work. See forms QA-1 thru QA-5 provided in the General Requirements. 3.1.2.1 Qualifications/certifications. The contractor must submit the Coating Tech Rep's name, qualifications/certifications, and certificate number(s) to the Contracting Officer prior to contract award.. NOTE This work item requires the use of an NACE-Certified Tech Rep. The use of a QP-1 certified company/contractor alone is not sufficient. 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 RO system components Deck grating 3.1.5 Temporary access openings. Due to limited access to work areas, the Contractor may, with express permission of the KO (via submission of a CFR), cut access holes to facilitate accomplishment of the work specified herein. Perform all work required to open and close the access openings in accordance with SFLC Std Spec 8636. 3.1.6 Work plan. The Contractor must provide a work plan (preservation plan including protection plan) for the Tank Preservation listed in Table 1 in accordance with SFLC Std 6310, paragraph 3.2 (Preservation Plan) to the Contracting Officer on the first day of contract's period of performance. 3.1.6.1 Pre-work preservation conference. Prior to the start of any preservation work, the Contractor must facilitate a conference meeting with the KO, COR, Coast Guard Inspector(s), Contractor and Contractor's representative able to speak to technical preservation details and requirements. QC/QA Program. The requirements of SFLC Std Spec 0000 3.2.4.2.2.3, Contractor's QC/QA Program (as outlined in SFLC Std Spec 0000, 3.2.4 QC/QA Program), Material Receipt Conformance (as outlined in SFLC Std Spec 6310, 3.1.1.2 Material Receipt Conformance), Preservation plan (as outlined in SFLC Std Spec 6310, 3.2 Preservation plan), SFLC Std Spec 6310 3.1.1.3.1 and 3.1.9 must be formally reviewed and approved by the KO, PDS and SDS. Only submit Manufacturer's Product Data Sheets (PDS) and Safety Data Sheets (SDS) if NAVSEA approved ASTM F718 sheets are not available. 3.2 In-process quality control measures. The Contractor must abide by all the safety, preservation, and quality control requirements specified in SFLC Std Spec 0000, paragraph 3.2.4.2 (In-process QC measures for - critical-coated surfaces). Surfaces being preserved are considered - critical-coated surfaces. All QA Forms and NACE II Reports must be submitted to the COR for review no later than 24 hours after completion of work. 3.2.1 Daily reports. At the conclusion of each work day , the Contractor must provide Daily Reports generated and signed by the Coating Tech Rep. Daily reports must summarize work accomplished that current day, work to be accomplished the following day, any and all materials used during work that day, any and all readings taken and/or data collected (i.e. environmental readings, DFT, WFT, etc) identifications of work locations, time and type of any inspections conducted with the results of such inspection(s) and must also include descriptions any events of non-conformance in relation to the specification, applicable references, standards, and technical data sheets (i.e ASTM F718s). 3.2.2 Environmental readings. Environmental readings must be accomplished within the agreed upon hours according to the interval outlined in SFLC Std Spec 6310, Appendix D3.1. 3.3 Surface preservation. The Contractor must prepare and coat 33% of all tank interior surfaces (including internal surfaces of manhole cover(s), manhole cover hull ring(s) extending outward to the weld line that ties the hull ring into the tank plating on the tank exterior). 3.3.1 Power tool clean all affected surfaces to - bare metal in accordance with SSPC-SP 11, in lieu of using abrasive blasting; and feather edges of existing intact coating to the prepared areas, in order to provide a smooth transition with the new paint. 3.3.2 Inspection. The Contractor must inspect all cleaned surfaces and exposed substrates of areas in tanks listed in Table 1 (after removing/cleaning surface covering/coatings and prior to priming substrates) in accordance with SFLC Std Spec 6310 3.1.8.1 Surface cleanliness evaluation - visual standards. Submit a CFR. 3.3.3 Waste and debris removal. The Contractor must remove all waste and debris generated by the tank preservation process (surface preparation, substrate cleaning, priming, and coating). Waste and debris must be disposed of in accordance with SFLC Std Spec 6310, paragraph 3.1.8.2 (Debris removal and disposal), SFLC Std Spec 0000, and all applicable Federal, state, and local laws, ordinances and regulations. 3.3.4 The Contractor must coat the prepared surfaces using the system specified for "Tanks and Voids (Potable Water Tanks)" in SFLC Std Spec 6310, Appendix B (Cutter and Boat Interior Painting Systems). Select finish/topcoat color to match existing adjacent surfaces. 3.4 Curing. The Contractor must ensure tanks are cured in accordance with the manufacturer's instructions for NSF/NEHC certification under the same conditions before being filled. note Typical curing times are at least 4 days, and range up to 14 days or longer, depending on the paint selected, amount of surface area covered, and environmental conditions. See paint manufacturer's recommendations for specific application. CAUTION Verify application and cure requirements with paint manufacturer prior to paint purchase and application. Lack of attention to environmental conditions can adversely impact paint system cure, cause unnecessary contract time delays, and negatively impact crew health and vessel habitability when tanks are put back into service. DO NOT assume paint Product Data Sheet to be accurate. Contact paint manufacturer directly to verify, as formulations change and new application information may be available. 3.4.1 The Contractor must rinse freshly painted potable water tanks at least twice with freshwater before being disinfected and put into service. 3.5 Touch-up preservation. The Contractor must prepare and coat all new and disturbed surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, paragraph 3.1.13 (Touch-ups and minor coating repairs). 4. NOTES This section is not applicable to this work item 53310_MLA_0624_418 ITEM 3: Potable Water Pneumatic Tank, Clean and Inspect 1. SCOPE 1.1 Intent. This work item describes the requirements for the Contractor to clean and inspect the following potable water pneumatic tank(s): table 1 - Pneumatic tank information SERVICE LOCATION CAPACITY (gallons) PRESSURE (psig) Potable Water Hydro-Pneumatic Tank 3-64-0-E 280 100 1.2 Government-furnished property. MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED COST ($/UNIT) N Bladder, Water NSN: 4510-01-601-2564 P/N: 660603996 1 ea. $2,936 2. REFERENCES Coast Guard Drawings Coast Guard Drawing 418A-WMSL-530-001, Rev C, Potable Water Systems Diagram Coast Guard Drawing 750-WMSL-530-019, Rev E, Potable Water Unit 3120 (ASC 530312-PW) Coast Guard Publications Coast Guard Technical Publication S6435-TL-MMI-010, 15 February 2015, Angle Relief Valve, Type D50 - Description, Operation, and Maintenance - Rev 9 Coast Guard Technical Publication (TP) 7082, SWBS 533, Dec 2020, Potable and Chilled Water Tanks Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2022, Requirements for Preservation of Ship Structures Other References NSF International (NSF) 61/600, 2024, Drinking Water System Components - Health Effects American National Standards Institute/American Water Works Association (ANSI/AWWA) C652-19, 2020, Disinfection of Water-Storage Facilities 3. REQUIREMENTS 3.1 General. 3.1.1 CIR. None. 3.1.2 Tech rep. None. 3.1.3 Protective measures. The Contractor must furnish and install all protective measures in accordance with SFLC Std Spec 0000, (Vessel component, space, and equipment protection). 3.1.4 Interferences. The Contractor must handle all interferences in accordance with SFLC Std Spec 0000, (Interferences). Known interferences include, but are not limited to the following: Piping, hoses, and supports Water 3.1.4.1 Tank residual fluids. Remove and dispose of all tank residual fluids in accordance with all applicable federal, state, and local laws and regulations. 3.1.5 Work locations. The concerned work areas are listed in Table 1. See the applicable drawings in Section 2 References for guidance, locations, and details. 3.1.6 Materials, tools, and services. The Contractor must provide service, tools, and materials to accomplish the requirements in this work item. New components, parts, materials, and paints with the same color, comparable and matching material properties as the existing components/parts. Use references in Sections 1, 2 and SFLC Std Specs for guidance, required materials, and details. 3.2 Preparation. The Contractor must depressurize and drain the designated tank(s) in Table 1 before performing any work on them. Dispose of all fluids in accordance with all applicable Federal, state, and local environmental regulations. Do not drain any fluids (including fresh water) into any space, bilge or exterior location. NOTE Do not drain any fluids (including fresh water) into any space, bilge or exterior location. 3.3 Operational test - initial. Prior to commencement of work, the Contractor must 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 Coast Guard personnel will operate all shipboard equipment and machinery. 3.4 Cleaning requirements. The Contractor must clean the tank as follows: 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 laws, ordinances, and regulations. 3.4.1 Tank content and waste removal. The Contractor must dispose of residual tank contents and any cleaning fluids in accordance with all applicable federal, state, and local laws, ordinances, and regulations. Notify the COR (in writing) at least 48 hours prior to removal of wastes and fluids. 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. 3.5 Visual inspection. The Contractor must clean and visually inspect the internal and external surfaces of each tank for signs of corrosion, pitting, and other damage. If required by the pneumatic tank's construction, the Contractor must provide and use a borescope during the visual inspection. Submit a CFR. 3.6 Surface preservation. If a Change Request has been authorized and released, the Contractor must prepare and coat each tank's interior surfaces using the system specified for - Tanks and Voids (Potable Water Tanks) in SFLC Std Spec 6310, Appendix B (Cutter and Boat Interior Painting Systems). If preservation is for less than 100 percent of tank interior surfaces, power tool clean all affected surfaces to - bare metal in lieu of using abrasive blasting, and feather edges of existing intact coating to the prepared areas to provide a smooth transition with the new paint. 3.7 Renew tank air bladder. The Contractor must renew the air bladder in accordance with TP 7082 with provided GFE. 3.8 Relief valve testing. The Contractor must remove, clean, inspect, test, and reinstall the tank relief valve, CPW-V-013. Clean and visually inspect all parts for defects, deterioration, dirt, scale, rust, grease, and marine growth. Inspect all valve openings for obstructions and damage to the valve seat, disc, and body. Use the appropriate test fluid, shop test the relief valve to the correct lifting pressure. Ensure that the valve seats correctly after pressure relief, without simmering, and with zero leakage allowed. Adjust the valve relief pressure as necessary to obtain the required lifting pressure. After adjustment, perform a final test to confirm the relief valve's lifting pressure with the Coast Guard Inspector present. Reinstall the relief valve upon completion of testing. Submit a CFR with test results and all data plate information. 3.9 Tank closure. After all authorized repairs, the Contractor must 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. Submit a CFR with the completed plug log. 3.9.1 Conduct a final inspection in the presence of a Coast Guard Inspector to ensure that no foreign objects or plugs have been left in the tank. Submit a CFR documenting this final inspection. 3.9.2 The Contractor must reinstall the tank(s) to the original configuration with new rubber gaskets conforming to ANSI/NSF 61. Renew all fasteners with stainless steel. 3.10 Tank disinfecting. The Contractor must disinfect and treat the affected potable water tank(s) and associated disturbed piping and components, as necessary, to meet or exceed the requirements of AWWA C652. Any of the three methods of chlorination listed in Section 4.3 of AWWA C652 is acceptable, but if Method 1 is utilized, then the retention period must be 24 hours. Appendix B of AWWA C652 shows the chlorine doses for a variety of disinfection methods. Refill the tanks with potable water upon completion of disinfection and flushing process. Remove and dispose of disinfection fluids and flushing water in accordance with all applicable federal, state, and local environmental regulations. Ensure that no one enters the tanks once disinfection is completed. NOTE Coast Guard personnel will operate all shipboard machinery and equipment. 3.11 Operational test, post repairs. After completion of work, the Contractor must 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. 4. NOTES This section is not applicable to this work item.