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the requirements of the Underwriters Laboratories listing. All fittings shall be <br /> protected using threaded plugs or suitable covers. <br /> 2. Standard fittings shall be 4" NPT forged steel weld flanges. (If required <br /> by regulation, 5" NPT forged steel weld flange with 5" x 4" nylon dielectric <br /> bushings may be used). <br /> 3. Interstitial monitoring shall be accomplished using the 2" threaded <br /> access tube. <br /> 4. Location: Refer to drawings. <br /> C. Containment Piping Collar (optional): <br /> 1. As required, collars may be used to provide secondary containment for <br /> the piping connections at the tank. <br /> D. Manways (optional): <br /> 1. All manways shall be furnished with U.L. listed gaskets, bolts and <br /> covers. <br /> E. Interior Painting and Coating: <br /> 1. If required, see Paint Section. <br /> F. Anchor Straps: If required, provide flat carbon steel anchor straps or other <br /> approved anchoring material as recommended by the tank manufacturer for each <br /> tank. The number, size and location shall be as that shown on the contract <br /> drawings. A suitable dielectric material shall be placed between the steel strap <br /> and tank at time of installation. <br /> G. Lifting Lugs: Specially designed lifting lugs or temporary lifting plugs shall be <br /> provided with each tank for installation. Lifting lugs are capable of sustaining the <br /> tank weight with a 2:1 safety factor. <br /> PART III Execution <br /> 3.01 Installation <br /> A. Tanks shall be installed in strict accordance with the most recent installation <br /> instructions provided by the tank manufacturer, NFPA, UFC, PEI/RP100, local <br /> ordinance or other applicable codes. <br /> 3.02 Testing <br /> A. The tank(s) shall be delivered to jobsite with a vacuum of at least 5.3 inches <br /> Hg on the interstitial space. If the minimum vacuum is maintained for one hour, <br /> the inner tank and outer tank may be considered properly tested. <br /> WARNING: The interstice is never to be tested by applying positive pressure. <br /> Tank(s) shall have an installation precision test performed by utilizing factory <br /> mounted testing unit to monitor the vacuum amount between the primary tank <br /> and it's outer FRP secondary containment. When followed per the tank <br /> manufacturers instructions, this test procedure meets Environmental Protection <br /> Agency (EPA) requirements for tightness testing of empty underground storage <br />