2025 Floating pier_Lift_station_cleaning_SOW.doc

USCGC CHENA (WLR-75409) DRYDOCKING AVAILABILITY, 1996

15-APR-2025

Sewage Holding Tank, Clean and Inspect – Dock This work item describes the requirements for the Contractor to clean and inspect the dock sewage hold tank.

Project Location:

USACOE Service Base

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

Location Work Hours:

0700 – 1530 (All work outside of these hours requires advanced approval from the Project Manager.)

Project Manager: DCC Joseph T. Medfisch Office (314) 771-6044 x 2107 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 clean and inspect the following tank(s):

TABLE 1 – TANKS

1.2. Government-furnished property.

2. REFERENCES

2.1 COAST GUARD DRAWINGS

Floating Pier BP Wharf & Pier BP

Pier Sewage Lift Station BP

2.3 Other References

CG Base STL Pier Photo

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, 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.

3.1.2.1. 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.

3.1.3. 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

3.1.4. Plug log. The Contractor shall keep a written record of all plugs used in tank vents and sewage piping.

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

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

NOTE

USCG PERSONNEL WILL OPERATE SEWAGE LIFT STATION

3.2. Service disruption. Prior to sewage collection service is disrupted due to contractor repairs, the Contractor shall verify required temporary facilities have been provided by the USCG.

3.3. Cleaning and inspection requirements. The Contractor shall accomplish the following for the tank listed in paragraph 1.1.

3.3.1. Content removal. Remove and dispose of all contents, fluids, and/or residues in accordance with all applicable Federal, state, and local regulations.

3.3.2. Cleaning requirements. Remove manhole cover(s). Clean all tank structure’s interior surfaces free of all foreign materials, sediment, and sludge. Clean all educators and level switches in place. 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.

NOTE

DUE TO THE LOCATION OF THE FLOATING PIER IN CONJUCTION WITH THE WHARF, THE CONTRACTOR WILL NEED A VACUUM TRUCK CAPABLE OF HANDLING AN APPROXIMATE 40FT SUCTION LIFT, PENDING RIVER LEVEL.

3.3.3. 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 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 FOR THE TANK LEVEL INDICATOR (TLI) AND/OR FLOAT SWITCH INSPECTIONS PRIOR TO CLOSING THE SEWAGE TANK

3.4. 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.

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.

(Rev-0)