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modern Com. any, Inc Modern Welding p Installation Instructions - Glasteel11 Jacketed Steel Tanks 4.3 For Glabteel II tanks fabricated without INTRODUCTION dielectric isolation, (threaded nylon bushings or flange isolation kits)this tank must use either: 1.0 Proper installation is essential to the expected 'Von-metallic piping,or product life and performance on Modern's Glasteel II B) Conductive piping must be isolated from Underground Storage Tank.This tank must be the backfill materiel and any other metal installed in accordance with these installation or grounding device. instructions, the latest issue of N.F.P.A. 30 and 31 pamphlet,the PEVRP-100 and local 'authorities tank installations TESTING having jurisdiction over underground with a vacuum on and codes. 5.0 Glasteel Il tanks are shipped 1.1 Although the instructions are clear and precise, the annular space. If a minimum of 5.3 inches unexpected conditions often occur and thus Hg of vacuum imaintained for one s hour,both the prudent thought,coupled with extreme care inner tanks and outor tank may be considered become the proper procedureproperly tested.Fluctuations in interstice vacuum are caused by temperature and barometric TANK HANDLING pressure changes. :1 secondary 2.0 Extreme caution shall be used when handling the NOTE: allha aeth interstitial (annulus) scontainment tank. Do not drop or roll the tank. vacuum at 5.3 in-11g. The vacuum 2.1 Equipment to lift and lower the tank shall be of tested using sufficient eapacity to do so without dragging or shall be held for one hour. Care shall betaken in the tank. to ensure that the interstitial space is not dropping subjected to excessive vacuum. 2,2 The tank shall be lifted and lowered using the .�pA 30:2-a•C "BPfore the tank is initially lifting lugs or lifting plugs provided. Cables or chains used shall be of adequate length. No placed in service,all leaks or deformations shall be corrected in an acc eptable manner." circumstances warrant the use of chains or slings CAUTION: Do Not Pressure Test Interstitial around the tank shell.Maximum angle of the (Annular) Space. sling shall be 60 degrees. EXCAVATION AND BEDDING TANK STORAGE S.0 If tank is stored on site prior to installation,a 8.0 Glastoel II underground storage tanks are epth of secure area shall be chosen. Speeial at l ctio on to 60�If a greater burial depth is required,ed to withstand&ma)Limum burial ontact the shall be placed in selecting the storageobjects acts manufacturer immediately• er accomplished assure the absence of rocks and foreign j 6.1 Tho excavation shall be properly act that would that might cause damage to the tank eatertor. and free from any material or object cause damage to the tank exterior. 6.2 The bottom of the excavation shall be suitably o 0 0 graded and leveled.The foundation for the tank shall be a minimum of 6 inches ofclathQ compacted sand,or 6 inches of p gravel, largest particle of which does not exceed 8/4 inch, vel crushings,angular �. rounded dg gra ry ; � � t.,.Ir " , c : or a squired to be not lase than 1/8" :.n,., ; az;.l'c- article size „ P „ or more then 112 . See chart in Backfill Section' 6.3 'there shell be a minimum of 12 inches from the outside edge of the tank to the inside edge of the INSPECTION excavation.This distance shall r the n true for d.0 Visually insP act the tank exterior for damage- the entire perimeter surrounding Any extreme gouging or abrasion should be caref REMOVE LARGE OR SHARP F*C reviewed and appro riate action taken. FFOM EXCAVATION P Is�NIMUM 4.1 Remove thread protectors and shipping plugs 12' from all openings (except vacuum gage location). Using compatible,non-hardening pipe sealant, install permanent metal plugs in all unused ' sLoas openings• ' blication, 9Y SOIL TYPE OFTEAMINEO a�1 B 4.2 Refer to Modern Welding Companyis publication, of "Finishing Instructions"for pr°Per openings and � Enu INER(W0. permanent coverings for unused op a�GaAVEI lifting lugs.