COMPLIANCE INFO_1998 REMOVAL AND INSTALL

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This procedure applies onl fiberglass underground FCI INSPEO : storage tanks manufactured by: Owens-Corning Fiberglass - The tank is tested for benzene and explosive vapor levels O/C Tanks prior to FCI personnel entry. Fluid Containment Inc. The tank is then continuously vented and monitored for PRE-INSTALLATION: oxygen and flammable vapor levels. The tank may be entered when the oxygen level is greater than 19.5%and The ReTank candidate tank is inspected subject to the the flammable vapor level is less than 10%of the tower following criteria: Explosive Limit. - The water table must be maintained at or below the - The ReTank candidate tank is inspected internally subject bottom of the tank to the following guidelines: f 9 - The candidate tank must have passed a recent precision - Indentions or other surface discontinuities are less than test before beginning the ReTank installation 1/2" high. s - Deflection of the existing tank does not exceed 3% of Note: Surface irregularities outside of these guidelines will the original diameter as determined by measuring the require review by FCI personnel and may require special repair vertical diameter of the tank through a fitting. procedures before the ReTank process can be performed. - Minimum vertical tank diameter is 89"for a 92"diameter fiberglass tank. TYPICAL RETANK INSTALLATION PROCEDURE: CONTRACTOR PREPARATORY WORK: - Entry openings are typically cut in one endcap and at The contractor fills out and submits a"ReTank Job Site each manway location. Survey"form to Fluid Containment at least 2 weeks before proceeding with preparations for the ReTank operation. - The Contractor removes backfill, piping, and electrical connections from the top of the tank. - The Contractor arranges for/provides equipment necessary to unload ReTank equipment and supplies. - Tripods may be installed over the manway hole cutouts. (Note: This includes pallets and/or 55 gallon drums. It Chain hoists may be attached to the tripods in order to may also include a large sealed container -8'x 8'x 20' raise the tri-fold panels into position. Sea-Train) - The endcap opposite the entry hole is installed in 3 pieces The tank is then triple-washed,cleaned and defumed, and held in place with jacks until the permanent fiberglass under the direction of a local contractor(designated as seams are applied. The Contractor)and in accordance with API Standards, 2015 Safe Entry And Cleaning Of Petroleum Storage Tanks, and RP 1631, Interior Lining Of Underground _ Storage Tanks. Also follow OSHA Regulation 29 CFR Parts 1910, Confined Space Entry Procedures,as well as any applicable local safety regulations. The Contractor is also responsible for providing a back- hoe and operator for a period of time to assist with the - Prefabricated panels are hinged together in groups of 3 insertion of ReTank parts. (designated as tri-folds),folded together and secured with (Note:The period of time for heavy equipment assistance straps. is typically no more than 2 days after FCI approves the interior condition of the tank.) Note:The panels are sized so that each tri-fold covers half of the circumference of the tank. The Contractor is responsible for maintaining security barriers around the job site.