COMPLIANCE INFO_2002-2006 - Laserfiche WebLink

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8.2.9. If tank is to be anchored, install the anchoring hardware at this time. (See SECTION 6.) 8.2.10. Place one 12 -inch lift of approved backfill material evenly around the tank. From the edge of the hole or the top of an adjacent tank, push the backfill in place by using a nonmetal probe long enough to reach beneath the tank. Work the backfill material under the tank body and domes so the tank is fully supported — that is, so there are no voids under the tank. (See FIGURE 8-1 and FIGURE 8-2.) CAUTION Do not strike the tank with the probe or tank damage may result Right Wrong FIGURE 8-1 FIGURE 8-2 8.2.11. Repeat Point 8.2.10. with a second 12 -inch lift. 8.2.12. After the second lift of material has been placed and worked under the tank, bring the backfill to the top of the tank. 8.3. WET -HOLE INSTALLATION 8.3.1. Follow the dry -hole installation procedure (SECTION 8.2.) with the following modifications: 8.3.1.1. Before performing Point 8.2.1. of the dry -hole installa- tion, take a measurement of the internal diameter of the tank before the tank is placed in the excavation hole. (See SECTION 14 of the Installation Manual for instructions on taking diameter measurements.) Record this measurement as Initial Internal Diameter on the Tank Installation Checklist, SECTION 4. 8.3.1.2. Before performing Point 8.2.1. of the dry -hole installa- tion, pump the water from the hole and continue pumping to maintain minimum water level during tank installation. 8.3.1.3. During Point 8.2.2. of the dry -hole installation, when setting and leveling the tank, partially ballast the tank until it settles firmly on the prepared bed. The ballast level in the tank must never exceed the water level in the hole by more than 1 foot until the backfill reaches the top of the tank. (See FIGURE 8-3.) 8.3.1.4. Omit Point 8.2.8. 1�1 17 FIGURE 8-3 8.3.2. Cover depth must meet minimum depth specified in SECTION 5 of this Installation Manual. 8.3.3. Completely ballast the tank once backfill is even with the top of the tank. ® WARNING Do not use air pressure to test tanks that contain or have contained flammable or combustible liquids or vapors. The fuel and air mixture could explode and result in death or serious injury. Tanks should be air tested before ballasting. WARNING If product is used as ba/Iasi; exercise special care in handling. Safeguard against sparks, fire or product spills. Improper handling of product could cause a fire or explosion and result in death or serious injury. 9.1. GENERAL 9.1.1. After backfill is brought to the top of the tank, take a measurement of the internal diameter of the tank as a deflection check. (See SECTION 14 of the Installation Manual for instructions on taking diameter measurements.) 9.1.2. After the internal diameter of the tank has been measured and vertical deflection is determined to be within the limits specified by Xerxes (See table in Tank Installation Checklist, SECTION 4.), the tank must be pressure tested to ensure that no damage occurred during installation. 9.1.3. Follow the procedure in SECTION 3, soaping all exposed areas of the tank and all fittings, and monitoring the pressure for one hour. 9.1.4. Carefully relieve the pressure in the tank. Remove the quick -disconnect assembly from dry double-wall tanks. WARNING Do not use air pressure to test tanks that contain or have contained flammable or combustible liquids or vapors, and do not perform any postinstallation pressure tests. The fuel and air mixture could explode and result in death or serious injury. Tanks should be air tested before ballasting. E