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Always consult a soils engineer for proper design of excavation, Refer to Modern Welding Company's publication, "Finishing <br /> tank support and restraint of buoyant forces when installation InsWctions" for proper installation of permanent coverings for <br /> is located in these unstable soil areas and where a high water unused openings, lifting lugs, piping, fittings and any exposed <br /> table is expected. steel surfaces. Finishing InsWctions are not complete until <br /> all exposed steel surfaces on tank are sealed with fiberglass <br /> resin. <br /> Modern Welding Company would like to acknowledge and <br /> thank the Petroleum Equipment Institute of Tulsa, OK for <br /> allowing us to use their illustrations to help clarify parts of this <br /> installation manual. <br /> Finer <br /> fabric <br /> n=r. <br /> i�\I;: SUBSIDIARIES: <br /> Corporate Office <br /> Unstable soil Owensboro, KY (502)685-4400 <br /> q�:U •,, <br /> >,I Modern Welding Company of Owensboro, Inc <br /> �;_,�„= Owensboro, KY (502)683-5323 <br /> %,�c<;rr�= �•=_%u_ Modern Welding Company of Ohio, Inc <br /> 9 P Y <br /> ��,��, =�C.r •,��I�Ali,�`��� Newark, OH (614) 344-9425 <br /> Modern Welding Company of Ohio, Inc <br /> Heath, OH (614) 344-9425 <br /> Modern Welding Company of Florida, Inc <br /> Piping and Attachments Orlando, FL (407)843-1270 <br /> Modern Welding Company of Texas, Inc <br /> Modern Welding Company markets tanks with and without Houston, TX (713)675-4211 <br /> dielectric isolation such as threaded nylon bushings or flange Modern Welding Company of Texas, Inc <br /> isolation kits. When tanks do not have dielectric isolation, then Rhome, TX (817)636-2215 <br /> tank must use either: Modern Welding Company of Iowa, Inc <br /> A) Non-metallic piping,or Burlington, IA (319)754-6577 <br /> B) Conductive piping must be isolated from the backfill Modern Welding Company of California, Inc <br /> material and any other metal or grounding device. Fresno, CA (209)275-9353 <br /> Modern Welding Company of Georgia, Inc <br /> Augusta, GA (706)722-3411 <br /> Within the installation, the pump and external piping must be <br /> free to move with the tank. <br /> Street boxes must be used to isolate tank's piping from loads j <br /> subjected at traffic pad. <br /> Internal piping must terminate 4” to 6"from tank's bottom. I <br /> Never use water or fuel to ballast tank in a dry hole excavation / <br /> until backfill is at top of tank level. <br /> All tanks must be vented to the atmosphere. Tanks are designed modern <br /> for operation at atmospheric pressure. <br /> Only when a vapor recovery system is utilized at the installation <br /> shall pressure or vacuum be administered with maximum American made <br /> amount being.25 psi. <br /> Special piping provisions shall be provided on double wall and <br /> jacketed secondarily contained underground tanks to prevent <br /> water from entering the annular space through monitor <br /> openings and secondary vents. <br /> Always follow guidelines of NFPA-30, 31 and PEI/RP-100 and <br /> local codes having jurisdiction when installing and piping <br /> underground storage tanks. <br /> 0 8/ 1995 MWCo - FILE:/fort/1`1746.PUB <br />