B08_140P1425Q0078_Solicitation_Attachment__1_SOW_Reservoir_Inspection_and_Cleaning.pdf

Yellowstone National Park, Potable Water Reservoir Cleaning, and Inspection.

As part of the park maintenance plan, Yellowstone National Park is seeking a contractor for cleaning and inspection of the potable water storage tanks listed in attachment #1.

The contractor will perform the work in compliance with all federal and state regulations and in accordance with the current AWWA (American Water Works Association) C652 Standard for Disinfection of Water Storage Tank Facilities and OSHA standards for tank inspections.

The contractor will inspect the complete reservoir or clearwell structure.

All accumulated sediment will be removed from reservoir floors.

All work will be conducted while potable water reservoirs are full and in-service.

Cleaning and inspection shall not increase turbidity of potable water inside reservoirs and tanks.

Sediment will be discharged into filter bags for land fill disposal.

Water from sediment cleaning can be discharged to the ground. Sediment must be contained in filter bag.

NPS will assume responsibility of filter sediment bag disposal.

Reservoirs are part of Yellowstone’s Public Water Systems. Yellowstone’s water systems are maintained in accordance with all Federal, State, and Public Health rules and regulations.

Water Systems are potable water with chlorine disinfection.

Access to reservoirs is by use of unimproved dirt service roads. Roads vary in length but do not exceed 2 miles of dirt road travel to access reservoirs.

On a case-by-case basis, the contractor shall notify the government at the time of inspection items found that can be remedied by normal means – typically simple removal with hand tools, minor grinding – typical removal of some previous control and design appurtenances that remain in some of the older tanks. The contractor shall account for minor removal of these design appurtenances in their bid price per tank.

This shall include minor cleaning of tanks and mechanical hardware within the tank not otherwise accessible by means of diving.

All inspection and cleaning equipment (including diving suits and helmet, robots, cables, etc.) shall be provided by the contractor and shall be fully sanitized prior to use in the tanks in accordance with proper disinfection requirements as stated in

AWWA.

Contractor shall meet all regulations and standards required for diving, inspecting, and repairing potable water tanks, including but not limited to regulations and standards from OSHA, EPA, CDPHE, AWWA, NFPA and TCEQ. All dive technicians and equipment that is used in the tank will be fully disinfected prior to accessing tank in accordance with AWWA Standard C652-11. All entries will be conducted in accordance with applicable OSHA regulations pertaining to diving and confined space; including 1910.401 through1910.441.

Inspection equipment used previously for other than potable water inspections is not permitted. Contractor will provide all equipment, personnel, and supplies necessary to perform the work. Work shall include the following:

• Water quality standards MUST be met and always maintained while performing work. Bacteriological tests will be taken by the Government at each location prior to and just after work is completed. Samples will be tested at Yellowstone’s EPA certified lab.

• Interior and exterior assessments include review structural, sanitary, safety, security, and any installed coating conditions.

• Minimum items to be examined include ladders, shell, roof, vents, man ways, seams, anchors, safety systems, hatches, external overflow, and plumbing.

• High resolution color video will document the interior inspection. All pertinent finding will be recorded including, dive technician’s findings and a narrative summary.

• Cleaning and removal of any sediment or material up to three (3”) present in the tanks.

• Sediment will be thoroughly removed from the floor of each scheduled tank.

Sediment will be pumped out of the tank into filter bag which can be drained onto the ground or sewer drain when available.

• All dive technicians performing work and inspections and repairs shall be well versed in knowledge of water systems and aspects of AWWA and be designated as a competent person in terms of system knowledge and ability to make and documents systems and identify deficiencies and rating of urgency of repairs required.

• The attached map generally locates the storage tanks throughout the park to aid the contractor in their pricing. The park will provide personnel to accompany the contractor to each of the locations and provide access to the tanks to complete the inspections. It should be noted that some tanks are in relatively remote areas with limited vehicle access, and most have no electrical source nearby. Inspection and diving efforts for tanks shall be self-contained – meaning that all means and methods can be achieved using methods provided on site by the contractor without such utilities or access available in all cases.

• Each inspection will be followed up with a report that includes a list of tank deficiencies, pictures of any findings, and cost estimates of the work to be performed to repair the tanks or bring them into compliance with current standards, codes, and regulations.

• Additionally, the contractor will provide video files of the tank interiors. Video files will be uploaded to SharePoint site specified by the government. Video files will accompany each report narrative and photo documentation.

• Period of Performance August 4, 2025 – September 5, 2025

Commercial Dive Service shall comply with the following regulations:

• OSHA CFR1910.401(A)(2)(LV)(B) - Commercial Diving Standards

• OSHA CFR 1910(g)(t) - Commercial Diving Operations

• OSHA CFR 1910.00 – Safety and Health Requirements

• OSHA CFR1910.146 – Permit Required Confined Spaces

• CALOSHA TITLE 8, SEC. 6050-6063 – California Commercial Diving

Standards

• CALOSHA TITLE 8, SEC. 5156-5159 – California Confined Space

Regulations

• NIOSH 87-113 – Confined Air Space Regulations

• NACE – National Association of Corrosion Engineers

• ANSI/AWWA D101-53(R86) – Inspecting and Repairing Steel Water

Storage Tanks

• ANSI/AWWA D102 – Painting and Inspecting Steel Water Storage

Tanks

• ANSI/AWWA C652-92 Disinfection of Water Storage Facilities

• ANSI/AWWA D104-91 (C) – Inspection of Impressed Current

Cathodic Protection Systems

• ANSI/AWWA D130-97(M25) – Maintenance of Flexible Membrane

Covers and Linings

• ASTM D3359-92a – Testing of Coating Adhesion to Metallic Substrates

• NSF 60/61 – Approved for Use in, or in contact with, Potable Water

All Dive Maintenance Technicians are required to know, understand, and abide by these regulations, as well as meet any other regulatory requirements, at all times.