COMPLIANCE INFO_1989-2013 - Laserfiche WebLink

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Fiberglas underground tanks must be installed according to these Instructions and NFPA 30 and 31. Local codes may apply and should be consulted. Failure to follow these Insta lat on instruc- tions will void the warranty and may result in tank failure. Proper Installation of Fiberglas underground tanks is required to prevent tank damage and to insure long-term corrosion -resistant service. It is imperative to read, understand and follow the instructions below. The presence of an Owens -Coming representative at the jobsite does not relieve the contractor of his responsibility to follow the published installation instructions. Any variances to the published • angle 60°-90° Lifting Tanks Use installation lift lug(s) to lift tank. Larger tanks (10' and 12' dia.) have multiple lift lugs; all must be used. Guide the tanks with guide lines. Do not use chains or cables aroundtank. DO NOT ROLL OR DROP TANK. Only use lifting equipment to move tanks. Capacity of lifting equip- ment must be checked before moving tanks. Set tanks on smooth ground, free of rocks and foreign objects and rechock. Single wall fiberglass tanks, 12,000 gallon capacity or less, may be manually unloaded from the truck at the job site by the OCF trained truck driver. If high winds are anticipated, the contractor is responsible for tieing down the tanks to prevent damage from being moved by high winds. All excavated native soil must be 2) Bled and Back -fill replaced with approved backfill. 1 4 naturally 1 rounded gravel 3 4 1 2 1 4 1 4 1 3 stone 4 Crushings 1 2 4 DO NOT MIX APPROVED GRAVEL WITH SAND OR NATIVE SOIL. Always use approved gravel. Do not backfill in layers using sand or native soil. If your backfill does not meet the specified requirements, alternate materials may not be used without written approval from Owens-Corning. Gravel A clean naturally rounded aggre- gate with a mix of particle sizes not less than 1/a11 or more than 3/4" is required. Stone or Gravel Crushings Washed stone or gravel Crush- ings with angular particle size not less than 1/a" or more than 1/z" are required. Note: All backfill materials must meet ASTM C-33 paragraph 7.1 for quality and soundness. The backfill should not have more than 3% passing a #8 sieve. The dry gravel density must be a minimum of 95 pounds per cubic foot. In freezing conditions backfill must be dry and free of ice. Note: You should require your backfill supplier to certify that the backfill meets this specification. Installation Instruction must be approved by Owens-Corning in writing prior to the tank installation. In order to activate the tank's 30 year structural warranty, the tank Installation must be performed by an Owens-Corning Fiberglas Corporation trained contractor In accordance with these instruc- tions. The Owens -Coming installation checklist, Pub. #15 -PE -8894 must be completed and signed by the installing contractor's representative and the tank owner's representative. A copy of the installation checklist should be maintained by both the installing contractor and tank owner to validate any future warranty claim. Before installing tanks, tighten fittings. Pressure test 4'through 10' diameter tanks to 5 psi. 12' diameter tanks to 3 psi. Soap the entire tank and fittings. The air test is of little value without soaping and a careful visual inspection for bubbles. Test at least 30 minutes to insure there are no leaks as indicated by soap bubbles or a drop in pressure. Do not approach endcaps or manways while tanks are under pressure. Use an air gauge with half or quarter pound increments so that changes in pressure can be easily observed. Do not use a vacuum gauge. 4) Hole Size [�4'-_10' Stable Walls In stable soil conditions for 4' through 10'diameter tanks (550-20,000 gallons), the hole i 1 i must be large enough to allow a minimum of 18"(24" preferred) between adjacent tanks and 18"(24" preferred) between the tank sides and ends and the banks of the hole. Minimum 18" Twelve -foot diameter tanks 12' Minimum 24" (25,000-48,000 gallon models), require 24" between tanks and hole sides, and require 24" between adjacent tanks. Unstable walls (all size tanks) _ \\ In muck, bog, peat, swamp, or `% landfill type areas where the soil is soft or in areas with expansive clay All Diameters soils, a larger hole is required to I support tanks. In these types of jf—►� I conditions the holes must be large t i enough to allow a minimum of 1/2 i I the tank diameter from ends and ' sides of tanks to hole walls. +/P dia. min. Unstable soils are defined as those. for unstable wars soils having less than 750lbs./sq. ft. cohesion as calculated from an unconfined compression test; or soils with an ultimate bearing capacity of less than 3500 lbs./sq.ft. Unstable soils or areas with expansive clay may require a reinforced concrete slab under tank for support. For unstable soils with less than 250 lbs/sq. ft. cohesion or with an ultimate bearing capacity of less than 500 lbs./sq. ft., a filter fabric hole liner is recommended to prevent backfill migration. Refer to Section 6.