2025 Floating Pier Sewage SSMR SoW.doc

USCGC CHENA (WLR-75409) DRYDOCKING AVAILABILITY, 1996

05-Mar-2025 Sewage Discharge Piping Removal and Replacement in Holding Tank –Floating Pier Project Location:

USACOE Service Base

USCG Schlimme Industrial Facility Dock 100 Arsenal Street Building 17 St. Louis, MO 63118

Project Manager: DCC Joseph T. Medfisch Office (571) 613-2251 Cell (724) 910-1596 Fax (314) 771-6269

E-mail: joseph.t.medfisch@uscg.mil

1. SCOPE

1.1. Intent. This work item describes the requirements for the Contractor to remove the existing discharge piping for two wastewater pumps located inside the tank listed in Table 1 and replace with new in-kind or equivalent piping, associated valves, hardware, and gaskets.

TABLE 1 – TANKS

LxWxH (FT)

1.2. Description of Layout. The piping and valves to be replaced are located solely on one end of the holding tank and is accessible by manhole cover. Two wastewater discharge pumps connect to two separate legs of 3-inch diameter cast iron piping via a mounted slide rail system. The piping converges at the top of the hold tank and has a short horizontal run before it’s stepped up to a 4-inch diameter pipe and proceeds to travel through the shared side wall of an adjacent void. The discharge side of each leg contains its own dedicated inline check valve and eccentric plug valve, and the main run contains a gate valve used to drain the system back into the holding tank. All components are conjoined by four bolt 7 ½-inch flanged ends, with the exception of the 4-inch to 3-inch reducer, which steps up to eight bolt.

2. REFERENCES

2.1 DRAWINGS & PICTURES

Floating Pier BP Wharf & Pier BP Pier Sewage Lift Station BP

Pipe Layout Pictures

3. REQUIREMENTS

3.1. General.

3.1.1. CIR

None

3.1.2. Protective measures. The Contractor shall furnish and install all protective coverings to seal off and protect all non-affected components, equipment, piping, 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. Lock-Out Equipment. The Coast Guard will be responsible before securing all hose connections leading to the holding tank and will deenergize and secure the wastewater pumps prior to work commencing.

3.1.4. Gas-Free Certified. Prior to starting work inside the sewage holding tank, the Contractor will utilize a certified Marine Chemist to verify that the space is safe for entry under all applicable Federal, State and Local law requirements.

3.1.5. Interferences. The Contractor shall handle all interferences. Known interferences include, but are not limited to the following:

· Pumps

· Piping

· Tank Level Indicators (TLI)

· Electrical Wiring

· Manhole Cover(s)

NOTE

USCG PERSONNEL WILL OPERATE SEWAGE LIFT STATION

3.2. Tank Cleaning. Prior to the project start date, the U.S. Coast Guard shall have the sewage holding tank pumped out and industrially cleaned by a third party, and all discharge lines drained. No wastewater shall be permitted to be pumped into the holding tank after it has been cleaned and work has been completed,

3.3. Materials list. The Contractor shall provide a full list of materials and hardware to the Project Manager prior to the project commencing.

3.4. Alterations and Modifications. If circumstances require alternative products or materials that are not a part of the existing design, or altering the original pipe layout, the Contractor shall notify the Project Manager for approval prior to execution and will ensure equivalent functionality and reliability.

3.5. Content removal. The Contractor will be responsible for the disposal all removed piping, valves, and associated hardware in accordance with all applicable Federal, state, and local regulations.

3.6. 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. Submit a Condition Found Report (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.

3.7. Operational Test. Upon completion of installation of all new materials, the Contractor will notify the Project Manager and request an operational test of the sewage lift station to ensure proper functionality of all valves, gaskets, and that all materials are properly secured and in place. The Coast Guard will arrange for only municipal water to be discharged into the top of the holding tank via firehose as to not compromise the atmospheric conditions of inside the tank in case re-entry is required.

4. HOURS OF OPERATION AND TIME REQUIREMENTS

4.1. Work Hours. U.S. Coast Guard IPD St. Louis is normally open 7:00am – 4:00pm, Monday through Friday and observes all Federal holidays. Any deviation the Contractor wishes to make from these hours must be approved first by the Project Manager.

4.2. Timeline to Complete Project. Due to the support operations of the pier, the sewage system shall only be taken out of service a maximum of 5 consecutive business days for repairs. The Project Manager shall work with the Contractor to coordinate the project start date and will authorize site visits prior to work commencing to ensure the successful completion of the project. The Project Manager will also coordinate with the Contractor for any needed pre-stagging of gear and materials on the day-to-day basis in an effort to help expedite the timely completion of the project.

5. QUALITY ASSURANCE

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

6. SAFETY AND SECURITY

6.1. All persons conducting business with or at the Coast Guard Industrial Production Detachment (IPD) 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.

6.2. U.S. Coast Guard IPD St. Louis is located at a secured facility on U.S. Army Corps of Engineers Service Base St. Louis, all persons require a valid State or Federal ID to obtain entry. The Contractor will provide the Project Manager a full list of the names of all personnel that will be working on-site.

(Rev-0)