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APPLY U.L. CMIFIE <br />PRE SEALANT TO THE <br />ENTIRE SURFACE OF <br />THE FEMALE NYLON <br />BUSHING THREAD <br />NOTE: RILL INSERTION <br />OF PIPE OR PLUG TO <br />CREATE "ELECTRICAL <br />ISOLATING GASKET" <br />2.4 Dual wall tanks require different air pressure <br />testing procedures. Do not conned a high <br />pressure air line directly to the interstitial <br />monitoring port. A factory applied vacuum within <br />the interstitial space can be used in lieu of, or in <br />addition to, the air test procedure. Consult tank <br />fabricator for air test recommendations. Do not <br />apply a vacuum to the primary tank or a single <br />wall tank. PEURP 900.94 also provides <br />guidelines. <br />3.2 Visu nspect the tank for damage. Pay <br />particular attention to areas where laminate has <br />been gouged or abraded. Mark all areas which <br />appear damaged for repair. Any section of the <br />laminate, which has been damaged beyond the <br />surface of the laminate, shall be tested for <br />holidays. This shall be done with a holiday <br />detector set at a minimum 1 O,000 volts. <br />3.3 Coat all holidays, damaged laminate, and/or <br />exposed steel surfaces using touch-up kit <br />furnished by tank supplier. Follow <br />manufacturer's Instructions for mixing and <br />application of resin. (See Section 9 for <br />procedure.) <br />411M GROUND AIR TEST 4.0 TANK HANDLING <br />it SOAP AREA OF PIPE 4.1 Controlled off-loading of the tank shall be <br />CONNECTIONS <br />». AND WELDS allowed. <br />a• <br />4.2 Equipment to lift the tank shall be of adegy; <br />size to lift and lower the tank without dreg- <br />dropping to prevent damage to the tank 01 <br />coating. <br />} <br />UNDEIGROUNO <br />STORAGE <br />TANK I NOT LESS 7HAF145° . <br />2.5 Take necessary safety precautions during air <br />tests. Do not leave tanks unattended while <br />under pressure. Avoid standing at the head of <br />the tank, especially while applying air pressure. <br />Use an air -pressure relief valve. <br />3.0 FRP LAMINATE I;NSPECTiON <br />3.1 Before placing the tank in the excavation, all dirt <br />clods and similar foreign matter shall be cleaned <br />from the tank. <br />id <br />4.3 Tank shall be carefully lifted and lowered into the <br />excavation hole by use of cables or chalnYof <br />adequate length attached to the lifting lugs <br />provided. A spreader bar shall be used where <br />necessary. Under no circumstances shall: <br />chains or wire rope slings be used around the <br />tank shelf. <br />5.0 ANCHORING o� G <br />5.1 High water tables or partially flooded excavation <br />sites exert significant buoyant forces on tanks. <br />