CGC KATMAI BAY - BOILER STACK CLEANING

1. SCOPE 1.1 Intent. This work item describes the requirements for the Contractor to clean the Boiler exhaust stack uptakes. 1.2 Government-furnished property. None.

2. REFERENCES Coast Guard Drawings Coast Guard Drawing 140 WTGB 259-001, Rev -, Diesel Exhaust Systems, Arrangements & Details 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 Other References None 3. REQUIREMENTS 3.1 General. 3.1.1 CIR. None. 3.1.2 Tech Rep. Not applicable.

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 following:

Access covers. Exhaust stack. Boiler. Exhaust pipe expansion joints. Exhaust insulation blankets. 3.2 Safety precaution. The Contractor must rig suitable safety netting, to protect workers during possible falls, and to protect the Engine Room and machinery from falling tools. NOTE Coast Guard personnel will operate all shipboard machinery and equipment. 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. 3.4 Cleaning. The Contractor must clean the interior surfaces of the exhaust piping to the Boiler, shown on Coast Guard Drawing(s) 140 WTGB 259-001, to a condition free from soot, tar, and any other foreign matter as follows:

3.4.1 Disconnect the exhaust piping as necessary to facilitate cleaning. 3.4.2 Thoroughly sweep, mechanically clean, and vacuum the interior of each exhaust pipe system, including the mufflers, from the exhaust outlet to the topmost location outside the vessel. Ensure that all tar deposits, soot deposits, and all other surface contaminants are completely removed. 3.4.3 Upon completion of cleaning, do the following:

3.4.3.1 Remove all debris from the pipe surfaces, stack deck, and Engine Room areas by vacuuming. Dispose of all cleaning materials and generated debris in accordance with all applicable Federal, state, and local regulations. 3.4.3.2 Reassemble exhaust piping; renew all disturbed flange connection gaskets with suitable high temperature, non-asbestos-containing gasket materials; and renew all disturbed fasteners. 3.5 Inspection and report.

The Contractor must perform a visual inspection of the following components; submit a CFR: Exhaust stack access hatches, including all associated studs and nuts. All cleaned exhaust stack surfaces. All exhaust expansion joints, including associated bolts. 3.5.1 Following cleaning of the interior of each uptake, the Contractor must demonstrate completeness of the cleaning process to the Coast Guard Inspector, showing that the entire length of uptake has been satisfactorily cleaned according to the work plan.

3.6 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.) NOTE Coast Guard personnel will operate all shipboard machinery and equipment. 3.7_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. 3.8 Period of performance. (POP) 27-31 Jan 2025