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Modern t. 6 ,e Co C c. Installation Instructions - GlasteelII Jacketed Steel Tanks INTRODUCTION 1.0 Proper installation is essential to the expected. product life and performance on Moderns Glastael II Underground Storage Tank. This tank must be installed'in accordance with these installation instructions, the latest issue of N.FT A. 30 and 31 Pamphlet, the P.ELRP-100 and local authorities, having jurisdiction over underground.tank installations and codes. 1.1 Although the instructions are clear and precise unexpected conditions often occur and thus prudent thought, coupled.with extreme care become the proper procedure. TANK HANDLING 2.0 Extreme caution shall be used when handling the tank. Do not drop or roll the tank. 2.1 Equipment to lift and lower the tank shall be of sufficientcapacity to do so without dragging or dropping the tank. 2.2 The tank shall be lifted and lowered using the lifting lugs or lifting plugs provided Cables or chains used shall be of adequate length. No circumstances warrant the use of chains or slings around the tank shell. Maximum angle of the sling shall be 60 degrees. TANK STORAGE 3-0 If tank is stored on site prior to installation, a secure area shall be chosen. Special attention shall be placed in selecting the storage location to assure the absence of rocks and foreign objects that might cause damage to the tank exterior. INSPECTION 4.0 Visually inspect the tank exterior for damage. Any extreme gouging or abrasion should be carefully reviewed and appropriate action taken. 4.1 Remove thread protectors and shipping plugs from all openings (except vacuum gage location). Using compatible, non -hardening pipe sealant, install permanent metal plugs in all unused openings. . 4.2 Refer to Modern Welding Company's publication, "Finishing Instructions" for proper installation of permanent coverings for unused openings and lifting lugs. 4.3 For GlasteeUl tants fabricated without. dielectric isolation, (threaded nylon bushings, or flange isolation lits) this taak.must use either: A) Non-metalliepiping; or B) Conductive -piping must be,isolated.from the-backfillmaterial and any other metal or grounding device. TESTING 5.0- Glasteel II tanksare shipped with a vacuum on the annular space; If a minimum of. 5.3 inches Hg of vacuum is maintained for one hour; both the inner tanks and outer tank xray be considered Properly tested. Fluctuations in interstice vacuum are caused by temperature and barometric pressure changes. NOTE: NFPA 30: 2-8.3:1 Secondary containment tanks shall have the interstitial (annulus) space tested using vacuum at 5.3 in -Hg. The vacuum shall be held for one hour. Care shall be taken to ensure that the interstitial space is not subjected to excessive vacuum. NFPA 30: 2-8.4: "Before the tank is initially Placed in service, all leaks or deformations shall be corrected in an acceptable manner." - CAUTION: Do Not Pressure Test Interstitial (Annular) Space. EXCAVATION AND BEDDING 6.6 Glastsel II underground storage tanks are designed to withstand a maximum burial depth of 60". If a greater burial depth is required, contact the manufacturer immediately. 6.1 The excavation shall be properly accomplished and free from any material or object that would cause damage to the tank exterior. 6.2 The bottom of the excavation shall be suitably graded and leveled. The foundation for the tank shall be a minimum of 6 inches of clean, inert, compacted sand, or 6 inches of pea gravel, the largest particle of which does not exceed 3/4 inch, or rounded -edge gravel crushings, angular particle size required to be not less than 1/8" or more than 1/2". See chart in "Backfill Section" 6.3 There shall be a minimum of 12 inches from the outside edge of the tank to the inside edge of the excavation. This distance shall remain true for the entire perimeter surrounding the tank. .