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modem Modern Welding Company, Inc. modern www.modweldeo.com Installation Instructions - Glasteel II Jacketed Steel Tanks INTRODUCTION A)Non-metallic piping,or 1.0 Proper installation is essential to the expected product B)Conductive piping must be isolated from life and performance on Modern's Glasteel II the backfill material and any other metal Underground Storage Tank.This tank must be or grounding device. installed in accordance with these installation TESTING instructions,the latest issue of N.F.P.A. 30 and 31 5.0 Glasteel II tanks are shipped with a vacuum on pamphlet,the PEI/RP-100 and local authorities the annular space.If a minimum of 5.3 inches having jurisdiction over underground tank installations Hg of vacuum is maintained for one hour,both the and codes. inner tanks and outer tank may be considered 1.1 Although the instructions are clear and precise, properly tested.Fluctuations in interstice vacuum unexpected conditions often occur and thus are caused by temperature and barometric prudent thought,coupled with extreme care pressure changes. become the proper procedure. NOTE:NFPA 30: 2-8.3.4 Secondary containment TANK HANDLING tanks shall have the interstitial(annulus)space 2.0 Extreme caution shall be used when handling the tested using vacuum at 5.3 in-Hg. The vacuum tank.Do not drop or roll the tank. shall be held for one hour. Care shall be taken 2.1 Equipment to lift and lower the tank shall be of to ensure that the interstitial space is not sufficient capacity to do so without dragging or subjected to excessive vacuum. dropping the tank. NFPA 30: 2-8.4: "Before the tank is initially PP g p 2.2 The tank shall be lifted and lowered using the laced in service,all leaks or deformations shall lifting lugs or lifting plugs provided. Cables or be corrected in an acceptable manner." chains used shall be of adequate length. No CAUTION: Do Not Apply Air Pressure to tank's annular circumstances warrant the use of chains or slings space. around the tank shell.Maximum angle of the EXCAVATION AND BEDDING sling shall be 60 degrees. 6.0 Glasteel II underground storage tanks are designed to TANK STORAGE withstand a maximum burial depth of 60".If a greater 3.0 If tank is stored on site prior to installation, a burial depth is required,contact the manufacturer. secure area shall be chosen. Special attention 6.1 The excavation shall be properly accomplished shall be placed in selecting the storage location to and free from any material or object that would assure the absence of rocks and foreign objects cause damage to the tank exterior. that might 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, o 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. INSPECTION Multiple tank installation will also require a 4.0 Visually inspect the tank exterior for damage. minimum of 12 inches between tanks measured from Any extreme gouging or abrasion should be carefully each outside edge. reviewed and appropriate action taken. 4.1 Remove thread protectors and shipping plugs REMOVE LARGE OR SHARP ROC from all openings(except vacuum gage location). FROM EXCAVATION Using compatible,non-hardening pipe sealant, MINIMUM 12• install permanent metal plugs in all unused openings. , 4.2 Refer to Modern Welding Company's publication, � � ,. .; U " "Finishing Instructions"for proper installation of SLOPE AS „as , DETERMINED }', permanent coverings for unused openings and BY SOIL TYPE GLASTEEL l « lifting lugs. '^� 1s g• ..` aa•- �G 4.3 For Glasteel II tanks fabricated withoutW. e ` dielectric isolation, (threaded nylon bushings or ' ," hr, CLEAN INERT SAND flange isolation kits)this tank must use either: .'.c��,{� I.. r. GRAVEL I