API 653 Internal Tank Inspection Robins AFB, GA

Perform a Tele-con kick-off meeting either prior to mobilization or the morning of the commencement of work on-site. Remove and transfer of 5,000 gallons of fuel product. Clean the tank and perform an internal AST inspection to also include the visual inspection of the containment area. Tank cleaning shall be done in accordance with UFGS 33 01 50.60. The tank Inspection shall be in conformance with applicable industry standards API 653, NFPA 30, NFPA 326, UFGS 33 01 50.60, and in compliance with 40 CFR 112, UFC 3-460-01, UFC 3-460-03 and any other applicable federal, state, local, service or host nation requirements. At a minimum, table 8-1 within UFC 3-460-01 shall be followed. All tank appurtenances that are required shall be documented along with all required appurtenances that aren’t present. Alarms, Automatic Tank Gauge equipment, and all tank appurtenances shall be tested and verified. The contractor shall visually inspect containment for ability to contain the entire contents of the tank in the event of catastrophic failure, assessing for cracks, settlement, and deterioration. Record dimensions of cracks and provide photographic evidence of each deficiency. Hydrostatically test the containment inlet, basin, line, valve. Visually assess the liner integrity and impermeability where applicable. Each containment drain inlet, drain line and containment drain valve shall be hydrostatically tested to assure the drainage system is liquid tight. The Contractor shall perform a hydrostatic test to ensure the drainpipe and release valve do not leak. The Contractor shall perform a hydrostatic test to ensure the integrity of the inlet sump. Drain Line and Release Valve. The Contractor shall perform a hydrostatic test to ensure the drainpipe and release valve do not leak. Test in accordance with applicable requirements of AWWA C600 for hydrostatic testing. Ensure the release valve is closed and pressurize the end of the pipe within the containment basin sump. Test for leakage by filling the pipe with water and pressurizing to 10 psi using a suitable pump connected to the pipeline. The test pressure shall not vary by more than ±1 psi for the duration of the test. Hold this pressure for not less than 2 hours. If the system does not hold pressure, check the outfall point to see if water is bypassing the valve. Test pressure shall be maintained during the test by adding makeup water through the pressure test pump into the pipeline. Accurately note the amount of makeup water required to maintain pressure during the test. Containment Drain Inlet. The Contractor shall perform a hydrostatic test to ensure the integrity of the inlet sump. Test for leakage by filling the inlet with water to a level at least 1-2 inches above the top of the inlet structure. The inlet shall hold this water for not less than 2 hours with no measurable change in the water level. UT Scan. Coverage of the UT scan shall include 5 points per shell plate on the first shell course. Spot UT scans shall be made once every foot along the circumference of the tank shell within the critical zone and along the tank chime as accessible. 5 points per shell plate should also be taken along the spiral staircase for each shell course as accessible. Provide UT scans of tank shell nozzles on the first shell course and their respective reinforcements plates as applicable. Include all findings in the inspection report. Replace existing wiper seal. The existing wiper seal (foam log, double wiper etc.) shall be removed and completely replaced with a new double wiper seal in accordance with UFGS 33 56 21.17 and the IFR manufacturer's recommendations; penetration seals in the floating pan will also need replaced. Provide legible tank stencil or label on tank. Upon completion of the Out-of- Service inspection the contractor shall provide a legible tank stencil or decal, consisting of black letters at least 1” in height, stating the date cleaned and inspected, the contractor’s name and the name of the contractor’s personnel supervising the work. Remove any existing stencils displaying previous inspection information.

Division 01 -	General Requirements, Quality Control, Testing and Inspecting Services.
Division 22 -	Plumbing, Facility Potable-Water Storage Tanks.